Of ancient dolphins and threatened sounds: an unheard ecological story from the Ganga

Platanista’s predicaments
Perceptions of the Ganga in India are often as diverse as the many states the river flows through. From being a living embodiment of a Hindu Goddess in one, to just a navigable channel in another, the Ganga oscillates in identity. One section of society ascribes ‘personhood’ to the Ganga while another abuses the river for economic benefits. Even people who believe in the holiness of the Ganga, litter and pollute. Devotion, it would seem, is not equal to reverence. The river is, therefore, constantly shrouded by a fog of duality and contradictions. So is the case for an inhabitant of the Ganga, the Ganges river dolphin (Platanista gangetica).


The Ganges river dolphin is the national aquatic animal of India, yet this animal is threatened by a wide range of issues, including declining water levels, increasing pollution, depleting fish abundance, and greater traffic in the rivers. But among these factors, one issue, a kind of pollution, is often overlooked. The pollution that I speak of is not the well-known chemical or industrial pollution of the water but a far more subtle pollution that severely affects the Ganges river dolphin: noise.
To understand why noise pollution is problematic for the river dolphin, we need to understand the animal’s biology. Unlike its marine cousins, these ancient cetaceans have almost lost their visual powers, probably because eyesight in a sediment-rich river is not a very useful sense. These dolphins navigate and forage by producing high-frequency clicks, much like bats do, to echolocate in the dark and murky waters. The dolphin relies on sound not only for navigation, but also to communicate with one another and to hunt.


People who haven’t seen the Gangetic dolphin often assume that, like their marine counterparts, they too are athletic when they dive. However, this dolphin only does the bare essential required to breathe; it will only breach the surface, ever so slightly, exposing its blowhole right behind the head, and silently plunge into the murky water to resume swimming in an unconventional manner.
Unconventional because this dolphin is a side swimmer and at times, uses its flippers to sense the bottom of the river, probably to orient itself. Most of the time, one can only see their arched back, head and the snout studded with sharp, pointed teeth. But on certain occasions, the animal will leap out of the water gloriously and dive in head first, showing that it too is capable of acrobatic skills. Although the river dolphin does display such diving behaviour during courtship periods, this behaviour is also characteristic of stress and is probably a response to motorised vehicles plying close to them.
In the 21st century, given the volume of traffic and noise in the river, stress is probably a constant for the dolphins. One needs to only look at China to witness the threats that increasing river traffic may lead to. Following the development of the waterway in the Yangtze River, continuous vessel movement and dredging became the ‘final nail in the coffin’ for the Chinese river dolphin and it was labelled extinct in 2008.
Because of our reliance on sight, it may be difficult to imagine the sonic perceptions of a river dolphin. However, an analogy with light may make this clear. Imagine being exposed to harsh and blinding stroboscopic light for every single hour of the day. It is sure to leave you blinded, disoriented and exhausted. What the Ganges river dolphins perceive when exposed to noise may very well be the same.
However, there is more to the Ganga than noisy vessels and dirty waters. Beyond the polluted waters and vast agricultural fields, there exists a land where otters and jackals roam without boundaries, where riverine birds flock by the hundreds and fishes as large as humans still dwell beneath the river. In the popular discourse, we hear how polluted and filthy the river is – which is true – but we miss out on other stories of the river. In trying to understand how noise affects the acoustic behaviour of dolphins, I have begun to appreciate this other side of the Ganga that  is rarely seen but is frequently heard. Out in the floodplains, the unseen captures your attention. Despite all the problems associated with the Ganga, and the popular notion of it being a ‘dead’ river, the part that flows through in Bihar still resonates with sounds that befit the living. This ‘other’ Ganga that I wish to write about is surrounded by charismatic animals on land, in water and air; areas that still retain their rustic nature, might and ‘wildness’ as was documented in the 1920s by the Bengali author Bibhutibhushan Bandyopadhyay in his book, ‘Aranyak’. A place that triggers a sense of being lost in time.


Riverine symphonies
The Ganga, especially in the northern state of Bihar, is a breathtaking place. The river and its floodplain is a vast expanse of sand and silt, bordered in most places with a carpet of agricultural lands as far as the eye can see. The river itself, in some places, is about three kilometers wide and looks like the sea. After sundown, however, one starts to sense the landscape not through sight but through sound, similar to a river dolphin. A particular incident during my fieldwork made me experience the night-time ambience of the river and remains etched on my mind.


I was based in a small town called Kahalgaon in Bihar right on the banks of the Ganga. At about 3:00 in the morning, as my boatman and I climbed down to the water’s edge to place our sound recorders and underwater microphones in the water, the howling North-Eastern winds that blow during March and April created ferociously crashing waves on the river. Our small fishing boat stood no chance in navigating the river in this tempestuous weather. However, the storm didn’t last too long and disappeared as swiftly as it had arrived. The ambient sound too changed dramatically. Soon after the roaring winds and crashing rain, all we could hear was the gentle lapping of waves against the hull of our fishing boat and the sound of the oar breaking the water’s surface. As we sailed across the river, a lone Ganges river dolphin started trailing our boat. These animals are known to follow small fishing boats at night in hopes of getting an easy meal from the scattering fish when the fishermen start hauling their nets. Although you cannot see much in the dark, the river dolphins reminded us of their presence by breathing air out of their bodies with a characteristic ‘sus’ sound. This sound is why these dolphins are known as ‘sus’, ‘susu’, ‘sons’, and ‘hu’, in various vernacular languages.

Experiences such as the one I describe are rare, but there is beauty even in the ordinary, if one looks, or rather listens, in the right direction. A traveller visiting for the first time may even turn back because of the cacophony that one perceives as he or she travels through the cities of Bhagalpur and Kahalgaon. But, in a sense, exposure to this din in the city is crucial in appreciating the more comforting and peaceful sounds of the river and its floodplain. This peaceful riverine orchestra is in fact quite rewarding if you listen close enough, for the musicians in this symphony are both human and non-human in nature. The wind and the rustling sand, during morning hours, form the foundation of the song, with the occasional motorboat acting as the bass, while the shrill calls of little terns, common ringed plovers, sandpipers, river lapwings, Eurasian curlew and small pratincoles form the melodious high notes. The soloist in this orchestra of the floodplain is the farmer who sings with his alto voice, a haunting tune that echoes through the vast floodplains.


However, come nightfall, the soundscape along the river changes drastically. Once, my boatman and I were camping on a river island near the town of Kahalgaon. His boat was anchored off the island and was gently swaying along with the waves. After dinner, I decided to take a stroll along the island and absorb the gentle sound of the flowing water. The peace and tranquillity that I felt was absolutely mesmerising but little did I know that the midnight symphony of the Ganges was about to begin.

Past midnight, the crescendo of the wind becomes noticeable, and like the wind in the dawn orchestra, formed the bass and keynote for this midnight symphony. The waves too, emboldened by the wind, created a soothing, crashing sound, with water bubbling in the sand. Nearby, filling in the role of cellos, ruddy shelducks took flight and called. Their calls, although quite eerie in nature, fit the vast, moonlit darkness of the river. Whatever caused the disturbance to the shelducks soon moved nearer and displaced a dozen greater adjutant storks. Their wings produced the percussions that were necessary to complete the low notes of this soundtrack.
 
Like curtains rising to show the playwright of a play, a shrill laughter erupted from the grasslands, revealing the disturbance that led to the dramatic flight of the birds. The characteristic call of jackals was unmistakable. The jackals caused a ruckus among the nesting lapwings and their calls along with the alarm cries of the lapwings added to the much needed soprano of the composition. The end of this midnight symphony was heralded by a hunting river dolphin which, while chasing fish in knee-deep water, kept slapping its jaws, producing a very apt applause for the performance.


Navigating nature
Noise and tranquillity; wilderness and civilisation; filth and reverence; dolphin and destruction, existing cheek by jowl in the Ganga, challenge our notion of where wildlife should exist. Usually, when we visit a protected area, we are often surrounded by all things ‘natural’ and devoid of anthropogenic developments. However, river systems, like the Ganga, are strange places. One can experience both ‘wilderness’ and ‘civilisation’ within a span of 24 hours. The same river island, overrun by people who depend on the river for their livelihood during the day, can transform into an island that harbours exciting wildlife, rich with drama, during the night. Unfortunately, this fragile and boundary-less nature that exists in the river also experiences threats more intimately than areas that have been cordoned off for protection.


With rapid development of waterways looming in the immediate future, experiencing the river and its natural entities may soon be a thing of the past. The proponents of the national waterway which include several ministries of the government such as the shipping and water resources, road and transport and ironically, the Ganga rejuvenation and development, argue that waterways are in fact, ‘eco-friendly’, since the amount of fuel consumed for transporting materials over water is much less. Their arguments may make economic sense but make very little ecological sense since continuous dredging, alteration of river flows and construction of embankments and dams need to be ensured for navigation on the river. Hence, here too, the identity of the river is being contested with one section lobbying for economic growth while the other section argues for ecological stability.


The rapid development of the waterways not only threatens the Ganges river dolphin but can also impact other organisms that depend on the river for their survival. Although tigers, sloth bears, and wild buffaloes that once roamed the land have gone extinct, otters, fishes, nilgais, wild pigs, jackals, the occasional gharial and mugger crocodile, hyenas, diverse waterbirds, and the shushuk (dolphin), still inhabit this timeless place. However, the fact that the dolphin and other wildlife still manage to survive here should not mislead us into thinking that the busy waterway has no impact.
If one is to develop and rejuvenate the Ganga, it is crucial to view the river through an ecological lens and not solely through an economic lens. The hydrology of the river, the status and health of other biodiversity, along with the community of people that depend on the river need to be taken into consideration if one is to revive this ‘dead’ river. Bihar remains one of the only states where rivers such as the Son, Gandak and Ganga run relatively free, without any major alterations to their flow. Instead of viewing this as an underdeveloped state of rivers, it should be viewed as a source of inspiration on how rivers need to flow.


Some dualities in the river lend character, whereas others reduce it. Therefore, it becomes crucial that we as a community see not just one aspect of the river but also appreciate and honour the more nuanced bits that often go unseen and unheard. If only we were to use this sense of appreciation and reverence as regularly as our sense of gain and profit, much of the harmful dualities will cease to exist.
Link to the soundtrack:https://soundcloud.com/mayukh-dey-533977316/riverine_symphonies
 
 
 
 
 

This article is from issue

13.1

2019 Mar

Diminishing colours on the food palette?: Reflections on lost diversity of foods in West Sikkim, India

In the 2000s, Sikkim banned its traditional pastoral practice in parts of the state due to ‘serious degradation’ of forests. This inevitably led to a loss of livelihoods and economic inequality between different groups. Perhaps the ban did lead to regeneration of forests where grazing used to take place. However, proof for this or that there was loss in forest cover before, is sparsely documented in scientific studies. Despite the absence of such studies, there remain entrenched views on the ‘unsustainable and backward’ practice of pastoralism.


Sikkim’s Organic Mission launched in 2015 was another policy that embellished the state government’s green image. This is, by any standards, a massive achievement since Sikkim is the first fully organic state of India that had completely stopped the use of chemical fertilisers for ten years before the policy came into being. However, a large population of its farmers who are below the poverty line (BPL) are still largely rice-fed by non-organic produce from outside, under the Public Distribution System.
Also, the earlier ban on grazing in forests stopped the production of large amounts of cattle dung required as manure to practice organic farming. Herds that numbered over 40 were collectively owned by two or three families, had to be sold. Today they have shrunk to 2-5 stall-fed animals depending on the activities the villagers choose to engage in. Faced with high rates of unemployment, the ban also triggered the movement of the younger population to urban areas for education and jobs.


These changes are best understood through a specific case, the Semba villages in West Sikkim, where I conducted a study in November 2016. The first agro-pastoral families migrated to Semba from Nepal in the 1960s when Sikkim was still a kingdom and the forest was not a designated national park. Sikkim went through a major shift in policies when it became a part of democratic India in 1975. These were amongst the regions that came under the grazing ban.


With a population of about 300, Semba is situated atop the Eastern Himalayas in India, disconnected from roads. Thus, all activities are conducted on foot. The villages lie close to the Kanchendzonga National Park (KNP), which is home to 36 species of rhododendron flowers and sometimes gives lucky trekkers a glimpse of the red panda.


With very apparent differences in altitude, temperature and livelihoods, Semba can be split into upland and lowland areas. The lowland is mainly covered in large cardamom crops as far as the eye can see, invading the kitchen gardens of residents who have planted them. This spice has a global demand and can sometimes earn farmers big money. However, fluctuating prices and recurring disease in the crops put farmers under constant threat.
The upland, covered in clouds at all times, grows vegetables and has larger numbers of livestock compared to the lowland. One cannot grow large cardamom here due to the colder climate. The upland is also closer to the forests. This drives a considerable difference between the earnings as does the landholding size. Land availability decreases with increase in altitude and cost of carrying head-loads goes up as distance from markets increases.

Three major changes

The changes experienced in Semba’s agricultural development in the last three decades have emerged due to several cross-scale interactions. The first was a shift from subsistence to commercial agriculture. The second, reduced livestock population owned by communities, and the third, restricted access of communities to forests. The overall result is a reduction in the diversity of food and food sources, and increasing dependence of communities on external markets and government subsidies for food and income. The main sources of food used to be subsistence agriculture, livestock husbandry and forest foraging which do not provide the same services anymore. A ‘food plate’ exercise with older community members to compare daily meals from 25-30 years ago revealed that the only item bought from the markets in the past was salt. The rest of the ingredients were available in the villages. The variety of foods had changed over time too and the current food was perceived to be less nutritious.


The careful mixing of colours on the old palette 

Back in the day, yak and other livestock grazed in the forests of the now Kanchendzonga National Park (KNP) in West Sikkim. This pastoral tradition, known as the gothwala system enabled the pastoralists to practice subsistence agriculture. The monarchic rule allowed this under an elaborate tax system, the regulation of which is not very well known. The cattle dung which was rich in forest nutrients served as manure for an array of crops grown by the mountain communities. The benefits of dietary diversity obtained from the integrated practice of livestock herding in forests and agriculture have been documented. For example, dung obtained from grazing in forests as opposed to stall feeding indirectly contributes to dietary diversity through biomass flows. So does increased availability of manure, that increases the diversity of home gardens.
The variety of crops depended on land holding size and time available aside from that spent in the goth or tending the cattle in forests. Crops included mustard, wheat, buckwheat, barley, maize and millets. Mustard was used to prepare cooking oil. Millet was used to make the famous chaang, a fermented alcoholic beverage, and flour for pancakes. Maize was used to make popcorn. From the dairy itself, communities made curd, churpi or dried cheese, and ghee or fat which they also used to sell. Meat was also an obvious by-product. While having access to forests, communities had developed the skill and knowledge to forage for fruit like kawlo and banta, wild mushrooms, wild saag, laipatta, bamboo shoots, and wild garlic among other herbs and plants with medicinal values. Wild deer was also hunted for meat. Wax from oak trees was used for making tea. While some of these practices continue, they have diminished greatly.


Wild vs. the tame
When Sikkim came under the constitutional framework of India, the Wildlife (Protection) Act, 1972 became applicable. This along with the declaration of KNP in 1977, made it harder for communities to access forests. Following this, with an increase in human population and the opening of new markets over time as Sikkim became integrated with India, the demand for cattle products increased. To save the forests from overgrazing, the government passed a ban on selective parts of Sikkim in 1998. The Semba communities shifted to commercial farming from subsistence, and the upland communities suffered greater losses than the lowland ones, resulting in economic inequality.

This came about because while cardamom can be grown in the lowland areas, the upland climate does not support it. Government policies together with growing market demand for large cardamom has also pushed aside the practise of subsistence farming. In Semba villages, 60% of MGNREGA funds are used for daily labour wages for those who work in the farms and, and 40% for buying high yielding large cardamom seeds. Water sprinklers have been distributed under Rashtriya Sinchayee Yojana, to expand cardamom plantations which could earlier thrive only close to water bodies and under the shade of trees. Local seeds are replaced by hybrid varieties that are issued by the central government, thousands of which are wasted every year as they are not suited to local conditions.


Food subsidy
Interactions between people, ecology and economy work in non-linear ways. When development policies are designed, the history and context of a system matter. The Public Distribution System was first created in the 1940s before India became independent. After the merger of Sikkim with India, BPL ration card holders could claim 35kg of free rice, per family, per month. An upland resident recalled the time they first started to receive subsidised rice and described it as the moon rising on a dark night. While the policy can help save money and/or provide food security, farmers may feel no need to grow food when the government gives rice almost free of cost. The rise of external markets in conjunction with subsidised rice make it easier to buy rather than grow. For example, mustard oil which was produced at homes is now replaced with refined oil from the markets.

This has probably interacted with the increasing need for money, which encourages commercial farming over the ‘toilsome practice’ of subsistence farming. The staple of Semba villages has shifted to rice from the various millets, wheat, buckwheat, maize and barley.


Semba’s sarpanch is concerned about the future of his children, saying, “if there’s a strike, a war in the future, and the rice stops coming from outside then should learn the practice of agriculture. Right now the rice comes from Siliguri, it’s not grown here.”


In a nutshell, the social-ecological system of Semba is faced with high vulnerability. Its diverse foods were lost as their sources diminished in one way or another and the communities have become increasingly dependent on government subsidies and external markets. The lost diversity is largely caused by the disintegration of subsistence farming, livestock grazing and forest foraging, that were all deeply connected to each other. These changes have probably come at the cost of nutritional decline in diets, as dietary diversity loss can reduce micronutrient adequacy. There is evidence that literacy has gone up and standard of living across Sikkim is better than the past. But has it come at the cost of long term resilience?

Why do colours on the palette matter?

Semba villages are not the only ones losing diversity and becoming dependent on far off sources. Parts of central India and Odisha have also come under the homogenous distribution systems, making a switch to a more rice-based diet and losing local varieties, respectively. The replacement of subsistence foods with imported market products causes a disconnect between diets and food sources. This depleting diversity of foods also results in a loss of knowledge that help to harvest or cultivate, produce and use them. With increasing droughts and resistance to disease in crops, several factors that govern marginal and small- scale farming communities need to be considered.


Keeping or providing options gives freedom of choice as well as the ability to fall back   on substitutes when other options fail. It is like an ability to choose from a colourful palette and paint one’s own future in terms of food diversity and choice. Acknowledging the diversity of individual social-ecological systems should be a key consideration while creating policy.
Studying interactions across time and different geographical scales can greatly inform policy. Conservation of forests and economic development are not individual end goals. They are parts of a larger painting that can ensure Sikkim’s food security.


*Semba is a replacement for the original name to maintain the anonymity of interview participants for ethical reasons.

Further reading

Baudron, F., J. Y. Duriaux Chavarria, R. Remans, K. Yang, and T. Sunderland. 2017. Indirect contributions of forests to dietary diversity in Southern Ethiopia. Ecology and Society 22(2): 28
Maikhuri, R.K., K.S.Rao, & R.L. Semwal. 2001.Changing scenario of Himalayan agroecosystems: Loss of agrobiodiversity, an indicator of environmental change in Central Himalaya. India. The Environmentalist 21(1): 23-39
 

 
 
 
 

This article is from issue

13.1

2019 Mar

Mass slaughter of an ancient mariner

Reports of a mass slaughter of sea turtles in Malaysia in 2014 were received with dismay. Scattered across the island of Pulau Tiga in the Balabac Strait of Malaysia, 53 carcasses of immature and adult green sea turtles had been found at different stages of decomposition. The discovery suggested that poachers were illegally taking turtles from the wild at different times and leaving them on the island, possibly until they could be collected by a larger boat. Two turtle carcasses had tags, and the inscribed information showed the animals had previously been tagged by biologists studying nesting turtles in the Turtle Islands of Malaysia and the Philippines. But had the turtles been captured while they were at Pulau Tiga or more distant waters? And where did the other turtles originate from?

Determining the source of the turtles would help understand the number of turtle populations that might be affected by such illegal poaching. Therefore, Malaysian researcher Dr. Juanita Joseph and her collaborators used wildlife forensics to compare genetic samples from the turtles found at Pulau Tiga with a database containing DNA sequences collected from turtles in the Pacific and Indian Oceans. The turtles found at Pulau Tiga matched the genetic composition of turtles feeding in Brunei Bay of Borneo island, and this could possibly have been the population targeted by the poachers. But turtles are migratory – breeding and hatching at one location while spending the majority of their lives feeding in another. Genetic results indicated that the turtles had hatched from beaches throughout the Sulu and Celebes Seas, Malay Peninsula, and the South China Sea before taking up residence in Brunei Bay or somewhere with a similar genetic mix of turtles.

So the researchers found that illegal poaching of turtles in Malaysia, such as those found at Pulau Tiga, could affect green turtle populations in different locations across Southeast Asia. Dr. Joseph and her co-authors are not certain that the recently established Tun Mustapha Park around Pulau Tiga will be an effective conservation measure as there is little information available about how sea turtles utilise these protected waters. Since green turtles are a slow-maturing species and the loss of breeding females is a serious conservation threat, they conclude that further studies of sea turtle movements are needed for effective management. In addition, regional collaboration and enforcement of existing measures of protection are also required.

Further Reading:
Joseph, J., H. Nishizawa, J.M. Alin, R. Othman, G. Jolis, I. Isnain & J. Nais. 2019. Mass sea turtle slaughter at Pulau Tiga, Malaysia: Genetic studies indicate poaching locations and its potential effects. Global Ecology and Conservation 17: e000586. Available at https://www.sciencedirect.com/science/article/pii/S2351989419300174.

Digging into Evolutionary Time: Extinctions in the Fossorial Shieldtail Snakes

Humans are modifying the planet at an alarming rate and are pushing many species to the brink of extinction. However, some species appear more vulnerable to extinction than others. To understand why some groups face higher extinction risks, we need to know how different groups have survived through environmental changes during their evolution.

Underground (fossorial) environments are comparatively more stable and thought to remain relatively unaffected by above-ground environmental fluctuations. However, it’s been shown that snakes that live underground evolve into new species at slower rates and experience higher extinctions compared to above-ground snakes (Bars-Closel et al., 2017; Cyriac and Kodandaramaiah, 2018). But how does living in a relatively stable environment lead to more extinctions? Fluctuations in climate are one factor that has been shown to influence extinctions in many organisms. Can the above-ground climate influence the evolution of fossorial species? Is it that fossorial snakes are so specialised in their underground environment, that they cannot adapt to sudden changes in their environment?

To address this, we (Cyriac and Kodandaramaiah, 2017) focused on shieldtail snakes (Family Uropeltidae), a group of highly specialised fossorial snakes found in the forests of peninsular India and Sri Lanka. Using DNA obtained from tissue samples, we built a phylogenetic tree that reconstructs the relationships between species and estimated the time at which different shieldtail species evolved. Using this tree, we estimated the rates at which new species arise and go extinct, which together (termed diversification) determines the total number of species in any family/lineage. We found that diversification rates were strongly correlated to above-ground temperatures over the 55 million years since shieldtail snakes evolved. We further found that a sudden increase or decrease in global temperature was correlated with higher extinction. Overall diversification also reduces in association with contraction and fragmentation of forest habitats that started from the late Miocene around 11 million years ago.

Our study highlights how rapid environmental fluctuations can negatively influence the evolution of fossorial taxa like shieldtail snakes. Shieldtail snakes, being highly specialised in their fossorial environments, may not be able to adapt to rapid environmental changes, and this raises concerns regarding how such species may cope with the present rate of climate change.
 
Uropeltis madurensis, a species of the family Uropeltidae that is restricted to the Southern Western Ghats of India.   

Further Reading:
Bars‐Closel, M., T. Kohlsdorf, D. S. Moen and J. J. Wiens. 2017. Diversification rates are more strongly related to microhabitat than climate in squamate reptiles (lizards and snakes). Evolution 71(9): 2243-2261.

Cyriac, V. P. and U. Kodandaramaiah. 2017. Paleoclimate determines diversification patterns in the fossorial snake family Uropeltidae Cuvier, 1829. Molecular phylogenetics and evolution 116: 97–107.

Cyriac, V. P. and U. Kodandaramaiah. 2018. Digging their own macroevolutionary grave: fossoriality as an evolutionary dead-end in snakes. Journal of evolutionary biology 31(4): 587–598.  
 

 

During drought, sea snakes have ‘water, water, everywhere, nary a drop to drink’

Yellow-bellied sea snakes rely on freshwater to stay hydrated, which is quite a challenge for a species that ventures far from land, drifting on the Indo-Pacific ocean gyres and currents that extend from southern Africa to the Pacific coast of Central America. Sea snakes possess salt glands, and it was previously thought that these structures enabled them to drink sea water and excrete the excess salt. But yellow-bellied sea snakes become dehydrated during periods of drought, demonstrating lower body water content and poor body condition than after periods of rainfall. Therefore, biologists realized the animals may not be drinking seawater to remain hydrated.

To verify this idea, Harvey Lillywhite and collaborators studied yellow-bellied sea snakes found in the coastal waters off Guanacaste province, Costa Rica, after a period of drought in 2017. Snakes were caught with a net and then transported to a laboratory, where they were weighed before being placed in a container holding freshwater. The following day, the snakes were re-weighed and then released. The researchers continued to catch snakes for 8 days, with heavy rain occurring between Day 2 and Day 3 and continuing intermittently for the rest of the study. Most snakes (80%) caught on Day 1 and 2 drank freshwater soon after it was provided to them and gained weight overnight. Once the rains began, the proportion of snakes drinking water and gaining weight in the lab decreased to only 13% by Day 8. The biologists believe that rainfall created a freshwater layer on the ocean’s surface, from which yellow-bellied sea snakes were able to ‘binge drink’ so they no longer needed to drink water when it was provided in the lab.

The study findings help us understand the species’ biology, but also identify a future challenge for sea snakes as climate change is expected to alter rainfall patterns and result in longer and more intense droughts in their tropical habitats. Will the species’ drifting behaviour, and potentially their distribution, change as an adaptation to less freshwater from rainfall being available during their oceanic travels? Only time and further studies will help us understand if the yellow-bellied sea snake can survive a changing environment.

Further reading:

Lillywhite, H.B., C.M. Sheehy III, M.R. Sandfoss, MR, J. Crowe-Riddell & A. Grech. 2019. Drinking by sea snakes from oceanic freshwater lenses at first rainfall ending seasonal drought. PLoS ONE 14: e0212099. https://doi.org/10.1371/journal.pone.0212099.
(Title includes a line from “Rime of the Ancient Mariner” by Samuel Taylor Coleridge.)

Biological Invasions: from ecologies to human well being

People have moved species from one part of the globe to another throughout human history. For the most part species introductions have been deliberate—most of the food we eat, the fibers we use, the plants in our gardens, have their origins in distant parts of the world. Occasionally, species introductions have been inadvertent or accidental—as hitchhikers on deliberate introductions, or, increasingly, as collateral to growing global travel and trade. Every so often, an introduced species tends to become dominant in its de novo environment, competing with native species, altering the structure and functioning of native ecosystems, and doing untold ecological and economic damage: the arrival of avian malaria in the Hawaiian islands led to the extinction of several bird species unique to the archipelago, and to the decline of many others; introduced grasses have altered !re regimes, thereby changing ecosystem structure, composition, and dynamics in the Americas; introduced trees are reducing water flow into aquifers and a$ecting water supply to Cape Town in South Africa. These are examples of what have come to be known as invasive alien species, ‘invasive’ a reference to the ecological damage they cause, and ‘alien’ a reference to their non-native biogeographical provenance. So great is the concern about invasive alien species today, that the international Convention on Biological Diversity has ranked them amongst the foremost threats to biodiversity and ecosystem functioning.

A British biologist, Charles Elton, was amongst the earliest to draw attention to the problem of invasive species in the late 1950s. He was concerned that with increasing human- aided movement of species around the planet, the uniqueness and distinctness of biodiversity in different parts of the world was in danger of being homogenised. He cautioned that though not all alien species were necessarily invasive, those that were could have devastating impacts. He also cautioned that the potential danger from invasive alien species was likely to be greatest on oceanic islands, with their unique but vulnerable biota, and in disturbed environments, where available resources could be readily preempted by invasive species.


Today there is a great deal of interest, both in what makes certain species more invasive than others, and in what makes certain ecosystems more vulnerable to invasion than others—questions that can provide insights into how ecosystems are assembled. These questions also have tremendous practical significance for the conservation of biodiversity and the services that society derives from ecosystems, as they can provide us with tools to predict which species are most likely to become invasive, and can enable us to model invasive species spread and to prioritise management interventions. #ere is also growing interest in evaluating the economic consequences of invasive species for human well being, and in developing appropriate policies and capacities for invasive species prevention, control, or mitigation.


This special feature brings together a collection of articles that showcases a diversity of concerns related to invasive alien species. Perrings et al. examine the economic and policy aspects of the problem of biological invasions at a global scale, especially with respect to global trade. The authors include microorganisms in their definition of biological invasive species, thus encompassing issues of emergent and recurrent human diseases. Their assertion, that the problem of invasive species is the most significant environmental issue facing humanity, is therefore not surprising.
Volin reviews work on Lygodium micro-phyllum, a climbing fern native to the Old World and now widespread in the southeastern USA. #is article illustrates the kinds of information, across scales, required to understand the ecological underpinnings of a species’ invasiveness; such information can aid the search for appropriate control methods and enable predictive modeling of the species’ spread, of value for managers and policymakers.


Three of the articles focus on Lantana camara in India, undoubtedly a reflection of lantana’s status as amongst India’s most widespread terrestrial invasive species. However, they examine very di$erent aspects of lantana—Sharma and Raghubanshi focus on its ecological impacts, Babu et al. talk about mitigation and control, and Shaanker et al. propose adaptation and related livelihoods. The article by Sharma and Raghubanshi draws on their work on the impacts of lantana on biodiversity and ecosystem functioning. They also propose that lantana’s invasive success may not be explained by any one characteristic of the species but rather, could be attributed to multiple mechanisms. Babu et al. describe a method they have designed to control lantana and restore native species and ecosystem functioning, which may have high benefits, particularly in protected areas.


The management of invasive species can have complex effects on livelihoods and ecology, as illustrated by both Shaanker et al. and by Shackleton and Gambiza. Shaanker et al. argue that once an invasive species has become widespread it may be best to live with it and enable local communities to draw a livelihood from it, thus reducing the costs of control. Shackleton and Gambiza draw our attention to Euryops floribundus, a native invasive species in South Africa; its eradication, though of bene!t to livestock owners, would adversely a$ect women who depend on it for fuel.
Rauf Ali is dismissive of the focus on what he terms the ‘page 3 species,’ including lantana. Instead, he draws attention to the vulnerability of island eco-systems, in this case, the Andaman islands, to invasions. His choice of invasive species—both elephants and chital are native to the Indian mainland— helps underscore an important point, that ‘alien’ is a biogeographical rather than a political concept. His choice of invasive species also underscores the cultural obstacles to our dealing with animal invasive species.


Namboothri and Shanker draw our attention to Kappaphycus alvarezii, a marine invasive species, and its relationship with the industrial production of soft drinks. Cola production has created an economic interest in the species, to the extent that arguments are made contesting the species’ invasiveness. Who bears the burden of proof? Should we adopt the precautionary principle? #is collection of summaries informs us that there are a great diversity of biologically invasive species and contexts, with some fundamental uncertainties but possibly great implications for human welfare.
Ankila Hiremath is a Fellow at ATREE, New Delhi, India. Mail at hiremath@atree.org
Vikram Dayal is an Associate Professor at the Institute of Economic Growth, Delhi, India.
 
Illustrator: Kalyani Ganapathy

This article is from issue

4.1

2010 Mar

Red Light Areas Prevent Close Encounters

A novel warning system to alert villagers to passing elephants could reduce human-elephant conflict on the Valparai plateau in Tamil Nadu, southern India, a mosaic of plantations (predominantly tea), woodlots and rainforest fragments. Home to one of the largest populations of elephants in the region, the plateau sees frequent interactions between people and elephants that result in accidental human fatalities, usually late in the evening or at nighttime, when elephant movement is hard to see.


But a new initiative by M Ananda Kumar and colleagues at the Nature Conservation Foundation, Mysore, could change all that. In association with the corporations, running the plantations, the Forest Department, media, and women’s self-help groups, Kumar and his team plan to install “ashing red lights activated by GSM-based technology mounted on poles near colonies and bus stops. These ‘Elephant Alert Indicators,’ seen from up to a kilometer away, will “ash red when elephants are in the vicinity, allowing locals to use alternative routes or wait till the lights are turned off. Kumar and his team, who have documented elephant-human conflict in Valparai since 2002, hope to build on the success of earlier initiatives. The team previously introduced a system that allows villagers to learn of elephant herd movement across the plateau through cable TV. The movements of the elephant herds appeared on a news ticker across the screen of a local television channel through the evenings.
Technology offers promising solutions to conservation problems, says Kumar.


Selling Nests to Save Birds
The indiscriminate poaching of swiftlet nests could be ended while at the same time allowing simultaneous sustainable harvest of nests in the Andaman Islands, India, according to a bold initiative by scientists and forest officers.
Edible-nest swiftlets are widely distributed across the south and southeast Asia, and their nests are the main ingredient in bird-nests soup, a popular dish in the Orient region. Valued at US $ 400/kg in the international market, poachers in India can earn up to Rs. 10,000/kg of nests harvested. Poaching of nests from caves prevents birds from raising young, and the subspecies of swiftlet on the Andaman Islands is under threat. Efforts to control this by including the species in Schedule I of the Indian Wildlife Protection Act (according it the highest degree of protection) failed, given the difficulty of monitoring caves in inhospitable terrain. The solution could lie in a unique program initiated by the late Ravi Sankaran and now executed by Shirish Manchi, Salim Ali Centre for Ornithology and Natural History, Coimbatore in association with the Andamans Forest Department. The program employs poachers to protect caves (numbering 181), and nests are harvested after the first breeding cycle.


Additionally, birds are translocated to abandoned buildings in order to establish breeding centres similar to those in Southeast Asia. Cross-fostering of chicks from caves to the buildings will eventually encourage more birds to breed in the buildings, given that the species is philopatric. Nests are kept in the custody of the forest department, and their sale will be monitored by a co-operative society (comprising of forest department, local communities and biologists). The team persuaded the Indian Government to deregister the species from Schedule I on a probation basis for 3 years, during which this controversial program will be monitored.

This article is from issue

4.1

2010 Mar

The Culling of the Flying Fox: How Everyone Lost

Human-Wildlife Conflict (HWC) describes the clash between wildlife and humans. Typically, in these cases, humans infringe upon animal habitat in order to make a livelihood. Although this is commonly associated with agriculture, in Asia and Africa, the rapid expansion of urban areas also drives HWC. It is an all-too-common occurrence across the world today, with examples such as elephants destroying tea estates in Assam and Amur leopards being killed in retaliation for preying on livestock in Mongolia. In the large majority of instances of HWC, local and national governments tend to side with the humans in the conflict, with responses ranging from turning a blind eye to retaliation all the way to legislation detrimental to the wildlife involved. Resolution of HWC is by no means easy, inexpensive or quick; additionally, most resolutions tend to lead to adverse outcomes for humans or wildlife involved. Mauritius provides a classic example of a disastrous outcome of the HWC resolution.

Mauritius is an island nation, east of Madagascar, in the Indian Ocean. It is made up of four islands and once famously housed the extinct dodo. It is home to a number of native species of animals and plants – such as the pink pigeon, the keel-scaled boa, the Mauritius ebony and the boucle d’oreille (the national flower of Mauritius) – many of which are threatened with extinction today. The Mascarene Endemic Flying Fox (Pteropus niger), the unfortunate antagonist in our HWC story, is currently listed as endangered by the IUCN. The reason for this conflict is that the fruit growers in Mauritius blame the species for reducing the yield of their mango and lychee crops. The IUCN Red List records show P. niger as rare in 1986, vulnerable between 1988 and 1996, endangered in 2008, vulnerable in 2013, and endangered in 2018.

Culling of P. niger in response to requests from the fruit growers dates back to 2006 when the Mauritian government recorded the culling of six flying foxes (although the government had authorised the culling of up to 2000 individuals). The original strategy of the government was to get the status of P. niger upgraded to vulnerable, and to pass a law authorising authorise the culling of species unless they were endangered or worse in response to the conflict, and to circumvent the current Mauritian law that forbade the culling of any species with a status of endangered or critically endangered. Hence, in 2013, the Mauritius government appealed to change the IUCN listing of the species from endangered to vulnerable in order. However, the revision of the conservation status for P. niger in 2013 was granted on the condition that it would be immediately reverted to endangered if culling was considered. Despite this condition, the Mauritius government undertook mass culling of P. niger during its breeding season in forested and protected areas in November-December 2015 (30,938 animals culled) and in December 2016 (7380 animals culled). The endangered IUCN listing of the species in 2018 is a direct result of these culls.

Following the 2015-16 culls, the government and the fruit growers expected the yields of mangoes and lychees to increase. To everyone’s surprise and shock, fruit yields, especially those of lychees, decreased markedly. The reasons for this are unclear; however, the fruit growers continue to believe that the losses in yields are caused by flying foxes and that the species needs to be culled further. The IUCN records the species’ current population at 37700 mature individuals, with losses of approximately 6000 individuals every year (to threats not including the culls). Another authorised cull on the scale of the 2015-16 culls would undoubtedly render the Mascarene Endemic Flying Fox extinct.

Mauritius changed its laws and carried out the culling of flying foxes not only in the absence of evidence of the effectiveness of the culling strategy in increasing fruit production and alleviating conflict but in the face of much evidence to the contrary. The 2015-16 cull was authorised despite evidence that it would only serve to further threaten the existence of P. niger. This case study presents a testament to the fact that evidence-based decision-making is crucial for conservation, often along with other forms of evidence such as past experience from management, and all the more relevant when species’ survival may be at stake such as in HWC situations. As various species of the flying fox threaten fruit production in a number of other countries, the precedent set by Mauritius is sobering and worrying.
 

Further reading
Florens, F. B. V., & Baider, C. (2019). Mass-culling of a threatened island flying fox species failed to increase fruit growers’ profits and revealed gaps to be addressed for effective conservation. Journal for Nature Conservation, 47, 58–64. https://doi.org/10.1016/j.jnc.2018.11.008
 

Threatened species recovery & climate change


The Bramble Cay melomys, a rodent native to Australia, occurred on a single, low-lying sandy atoll northeast of Cape York in the Torres Strait. In the 1970s, the population comprised several hundred individuals but no trace of the species was found during surveys in 2011 and 2014 and it was declared extinct in 2015. The loss of the species has been attributed to multiple events of ocean inundation and its demise likely represents the first documented mammal extinction that can be directly attributed to anthropogenic climate change.

The Bramble Cay melomys had been listed as endangered under Australia’s Environment Protection and Conservation Act (EPBC) 1999 and a recovery plan was published in 2008.  Recovery plans are prepared for threatened species in countries such as Australia, Canada, and the US to guide efforts for improving their status. Plans typically review ecological and taxonomic knowledge about the threatened taxa, identify key threats, and set out a series of actions aimed at improving conservation status. In the case of the melomys, the recovery plan acknowledged that climate change could pose a future threat but contained no strategies to reduce this threat. The extinction of the Bramble Cay melomys, despite the existence of a recovery plan, was the impetus of a study aimed at assessing the extent to which recovery plans for Australian threatened species were ‘climate-ready (Hoeppner & Hughes, 2018). We assessed a sample of 100 recovery plans for threatened species listed under the EPBC Act, recording whether they acknowledged the threat of climate change, and if so, the nature of the strategies proposed to ameliorate the threat.

Our results identified a substantial gulf between knowledge about climate change risk and recovery planning. While recognition of potential climate-related impacts has increased over time(9% before 2005 42% from 2005 to 2010; 77% after 2010), most proposed recovery actions were categorised as passive and incremental, with only a few plans encouraging bolder interventions to reduce extinction risk. In light of the growing threats to threatened species from climate change and the findings of this assessment, we recommend that all recovery plans be climate-informed and the scale and urgency of proposed actions be appropriate for the growing risk.

Further reading:
Hoeppner, J.M. and Hughes, L., 2018. Climate readiness of recovery plans for threatened Australian species. Conservation Biology. https://doi.org/10.1111/cobi.13270
 

Choose One: Your Backyard or the Public Park

For generations, being in and around nature has been associated with good health and psychological well-being. However, as more people move to rapidly developing urban areas, opportunities for interaction with the natural environment tend to decrease.

In their 2017 study, Jessica R. Sushinsky and her co-authors examined whether urban growth and increasing population density lead to a decrease in opportunities to experience nature. They estimated the changes that would occur in backyard sizes, public green spaces and bird species richness after the addition of 84,642 new houses in Brisbane, a growing city in Australia with many green spaces and high biodiversity.

Since more houses needed to be accommodated within the same area, the study assessed two models: one in which backyards were demolished to create more housing, and the other in which public green spaces were replaced with more housing.

The researchers found that opportunities to interact with nature as well as bird species richness decreased in both scenarios. Under a sprawling development model, larger backyards would exist at the cost of public green spaces and bird species richness. This negative result will be amplified in socioeconomically weaker districts which generally have a relatively less green cover and species diversity. Previous research suggests that this could lead to an increase in health problems and crime rates among populations residing in such areas.

Alternatively, reducing backyard spaces would decrease people’s interactions with nature around their homes but it will minimize other negative environmental impacts at a larger scale. Hence, the researchers conclude that adopting a well-planned compact development model is the better option.

Further Reading

Jessica R. Sushinsky, Jonathan R. Rhodes, Danielle F. Shanahan, Hugh P. Possingham and Richard A. Fuller. 2017. Maintaining experiences of nature as a city grows. Ecology and Society, 22.3.

Is rewilding viable under climate change?

A global view of climatic suitability for 17 large-bodied mammals from the study, showing the overlap of (re)introductions under current and future climate conditions. The current distributions shows the climatic tolerance under current conditions. The future conditions align with projections for 2070

In theory, yes, concludes the paper by Jarvie and Svenning (2018), which investigates if human-mediated climate change is likely to reduce the rewilding potential of large-bodied animals (megafauna). Climate change is recognised as a major threat to global biodiversity and ecosystem functions, mainly because under climate change, temperatures and precipitation may exceed a species’ physiological tolerances. Megafauna has had higher extinction rates and range contractions than other species, often leading to the loss of ecosystem functions, notably a reduced capacity to maintain biodiversity. This recognition has led to an increase in rewilding campaigns to restore self-regulating, biodiverse ecosystems. Rewilding projects often involve the reintroduction of extirpated animal species, or the introduction of functionally similar species to replace globally extinct species, aiming to restore top-down trophic interactions such as predation and herbivory to ecosystems.

However, climate change may alter the potential suitability of habitats for many species commonly discussed as rewilding candidates. As a consequence, current or proposed (re)introductions of species may be to areas that, under future conditions, are climatically unsuitable. This could mean major investments in (re)introducing species to areas that may become unsuitable habitat in the future, for example in areas that exceed the species’ maximum temperatures or that are unable to support their primary food source in future climate scenarios.
To assess the magnitude of this potential problem, Jarvie and Svenning intersect climatic tolerance estimates with future climate scenarios of 17 megafauna species commonly discussed for rewilding, including iconic species such as African savannah elephant, various rhino species, and lion. Since the geographic and environmental ranges of many large animals are already seriously restricted by humans, they quantified climatic tolerances of these species according to their estimated natural ranges in the absences of human-induced range contractions.

The results suggest that, for many species, the total amount of area with a suitable climate remains relatively similar from current to future climates. This means that, even under future climate change, trophic rewilding remains a viable option for restoring self-regulating biodiverse ecosystems. While there are other constraints (social acceptance, species composition and other ecological variables), climate change in itself does not appear to be a major future road block to implementing rewilding.


Further Reading 

Jarvie S & Svenning JC (2018) Using species distribution modelling to determine opportunities for trophic rewilding under future scenarios of climate change. Phil. Trans. R. Soc. B.  20170446 https://doi.org/10.1098/rstb.2017.0446

 

Conserve the Beauty to Save the Beast?

Conservation efforts often focus on protecting charismatic animals, such as elephants or pandas. It is frequently assumed that protecting these animals will help to conserve other less charismatic organisms at the same time. For example, scientists have used data on vertebrate and plant biodiversity to identify “hotspots” that have high biodiversity and suggested that protecting these locations would also protect invertebrate biodiversity. However, the largest portion of terrestrial biodiversity occurs in soil, and it is not clear whether determining conservation priorities based on aboveground organisms helps to protect soil biodiversity. Soil biodiversity supports many important ecosystem services such as nutrient cycling and carbon storage, and food webs in the soil and aboveground are often tightly linked.

In our study (Cameron et al., in press), we examined whether the typical focus on aboveground charismatic taxa (‘beauties’) serves to protect the functionally important but less visible and charismatic biodiversity in the soil (‘beasts’). We mapped aboveground biodiversity (mammals, birds, amphibians, and plants) and soil biodiversity (bacteria, fungi, and soil animals) globally. We found that areas of mismatch where aboveground biodiversity was high and soil biodiversity was low, or vice versa, covered 27% of the Earth’s land surface. In particular, temperate forests tended to have higher aboveground biodiversity but lower soil biodiversity. Boreal and tundra regions showed the opposite pattern of higher soil biodiversity but low aboveground biodiversity, and thus their conservation should be prioritized to protect soil biodiversity. Notably, these ecosystem types are also among the most vulnerable to climate change and should thus receive particular scientific and political attention.

The mismatch between soil and aboveground biodiversity hotspots suggests that conserving ‘the beauty’ will not be sufficient to save ‘the beast’. As a result, soil biodiversity should be explicitly considered in conservation actions and policy actions in the future.
 
Further Reading:
Cameron, E. K., I. S. Martins, P. Lavelle, J. Mathieu, L. Tedersoo, M. Bahram, F. Gottschall, et al. In press. Global mismatches in aboveground and belowground biodiversity. Conservation Biology. https://doi.org/10.1111/cobi.13311
 

Editor's Note 12.4

Conservation science has long been seen as the domain of trained professional. At CC, we have long acknowledged the role of indigenous knowledge, and published a special issue on the topic in 2013. We engage with this issue by visiting a fascinating project in the Nilgiris, a collaboration between Keystone Foundation, a local NGO and Cornell University, USA. Steven Wolf et al. provide an overview of the project which attempts to integrate research and practice towards conservation and sustainable development. Their article is linked to seven research pieces (online only) written by seven pairs of student researchers including an undergraduate student from Cornell and a young Adivasi community member from the Nilgiris.
Our feature article in this issue takes on the contentious issue of cats. Not so much differences in musical tastes pertaining to Andrew Lloyd Weber’s rendition of TS Elliot’s poems, but the dramatic impact that domestic cats have on biodiversity, and the opposition from cat fanatics to doing anything about it. We include an interview with George Schaller, one of the pioneers of wildlife biology and conservation. Talia Tamson gives us a glimpse into the use of cameras to study whale sharks. And in our creative rambling section, we have a poem delving into a researcher’s tryst with turtles; and our columnists wonder what the Half-Earth movement might look like if it were an Avengers movie!

Does fish farming help conserve wild fish?

Ocean ecosystems face significant threats from human activities, not the least of which is fishing. According to the Food and Agriculture Organization of the United Nations (FAO), by 2013 approximately 90 per cent of global fisheries were either overfished or fished to maximum capacity. The pressure placed on wild fish stocks from fishing, combined with other human impacts, such as climate change and pollution, has put many aquatic species and ecosystems at risk.

Aquaculture, or fish farming, is frequently presented as a possible answer to the problems created by overfishing. As fish farms can rear organisms from egg-to-plate, these technological systems can produce valuable and nutritious food, presumably decreasing demands placed on wild fish stocks. More broadly, the substitution or displacement of farmed for wild fish follows a commonly held principle that when one resource is being depleted, it can be replaced with another. Aquaculture technology can act as a sort of “relief valve” for capture fisheries.

In an article in Conservation Biology, Longo et al. (2019) examine whether aquaculture production displaces capture fisheries. The study uses World Bank and FAO data to assess this relationship within nations from 1970 to 2014. The authors develop multiple models to examine whether there is evidence of displacement while controlling for the principal driving forces of demand including economic and demographic indicators as well as more direct measures of demand, such as consumption of seafood and fish exports.  The results of the study did not provide convincing evidence that fish farming has thus far displaced or suppressed fisheries captures.

According to the study, continued efforts to enlarge seafood production appear to outpace technological efforts assumed to conserve wild species. Thus, the findings suggest seafood production has been structured more toward overall expansion, rather than environmental conservation. There are many explanations for why aquaculture production has not displaced fisheries captures as anticipated. The authors consider important global factors, such as economic growth dynamics, that organize the production of seafood and promote demand, and have been shown to greatly influence the development of food systems in general. Also, the study highlights that many aquaculture operations are directly linked to capture fisheries. For example, aquaculture feed often contains fishmeal and fish oil, which are likely to be procured from wild fish captures. In addition, promoting fish consumption through aquaculture may stimulate demand for all types of seafood. This study underscores the importance of empirically testing such relationships given the importance of these issues to sustainability concerns.

Further Reading
Longo, Stefano B., Brett Clark, Richard York, and Andrew K. Jorgenson. Forthcoming. 2019 “Aquaculture and the Displacement of Fisheries Captures.” Conservation Biology. https://doi.org/10.1111/cobi.13295

Can indigenous knowledge help conserve native bees?


Close your eyes and think of a bee, the first one that comes to your mind.  What does it look like? Is it tiny or huge, or somewhere in the middle? Most people will think of a honeybee or a bee in the genus Apis.  These bees are found across the world, and one in particular, Apis mellifera, was spread by Europeans to pollinate their crops.  Honeybees have declined in number in many places over the last decade, which is troubling to many people whose lives depend on agriculture.  Fortunately, there are over 20 000 species of bees in the world and some of them can compensate for honeybee loss. The problem is that many people cannot readily identify many bee species and might not know how to conserve non-Apis pollinators.

To address this problem, Bhattacharyya et al. (2017) examined indigenous knowledge of bees in West Bengal, India.  They set out to discover if farmers could identify both Apis non-Apis bees and if there were certain characteristics associated with a greater ability to tell bees apart.  The researchers also tested whether a short teaching intervention could increase the farmers’ ability to identify bees. In general, farmers could not identify many non-Apis bees, but they did find that women and those with more education performed better.  For example, 29% of women could identify a non-Apis bee, but only 11% of men could do so.  After the teaching session, both men and women significantly increased their ability to identify non-Apis bees, suggesting that quick interventions can make a big difference.  

Apis dorsata (giant honeybee), one of the honeybees that farmers were asked to identify in this study.  
Source: Arpit. K. Gaur, Wikimedia Commons: https://commons.wikimedia.org/wiki/File:This_is_Apis_dorsata_sucking_Nectar.jpg. Accessed 16 January 2019.

Based on these results, the researchers suggested that women could be the founders of future conservation efforts.  This is particularly important because government efforts to conserve bee diversity are currently lacking. Short sessions run by women on bee identification could help boost efforts for protecting the bees and their habitat.  In this way, the conservation of bees could both empower women to make significant positive changes in their environment and increase the chances that crops remain viable commodities in their communities.


Further Reading: 

Bhattacharyya, M., Acharya, S. KR., and Chakraborty, S.K. 2017. Pollinators unknown: people’s perception of native bees in an agrarian district of West Bengal, India, and its implication in conservation. Tropical Conservation Science 10:1-14.

Whale song, I hear what you say

Conservation management relies on understanding the population structure of vulnerable species and the exchange of individuals among different populations (known as population connectivity). These factors can be difficult to determine in animals such as humpback whales, a marine species that migrate long distances with few barriers to movements. Genetic and photo-identification studies have helped researchers study connectivity among populations of this species, but such techniques require a great amount of effort and time, and often only collect information from a small number of individuals in the population. Acoustic studies are another tool, and one proving to be very useful for researchers studying humpback whales.

Whale songs are made up of complex sequences of vocalisations sung by male whales in a specific pattern. Songs can evolve between years, but at any one time every male in a population usually expresses the same version of the song (although with slight individual flair). Each population has its own unique song, but populations in close enough proximity to hear each other (for example, in the same ocean basin) have more similarities in their songs than distant populations that don’t have the chance to learn each other’s song segments (such as those in different ocean basins). Song similarities among populations may also occur if a whale from one population joins another and males adopt sequences of the immigrant’s song.

Melinda Rekdahl and collaborators studied song exchange among humpback whale populations breeding in Gabon and Madagascar. Males were presumed unlikely to move between the two locations within a single breeding season due to a substantial geographic barrier- the African continent- between them. Any similarity in song would, therefore, suggest the two populations had been close enough to hear each other at other times. After collecting five years of song recordings, the researchers calculated that song similarity varied from ~20% to 100%, depending on the year. Such a high degree of similarity in some years could result from song exchange during periods of population connectivity, such as years when populations were in relatively close proximity in their feeding grounds or along migration pathways. Exchange of whales while feeding or migrating could occur during long migrations along similar pathways to reach find patchy, or even limited, food and would indicate a potential threat to the humpback whale populations. The factors driving population connectivity and song exchange between geographically distinct humpback whale populations will be better understood with a longer study of more individuals, and potentially include comparisons with the songs of even more distant populations.

Further Reading:

Rekdahl, M.L., E.C. Garland, G.A. Carvajal, C.D. King, T. Collins, Y. Razafindrakoto & H. Rosenbaum. 2018. Culturally transmitted song exchange between humpback whales (Megaptera novaeangliae) in the southeast Atlantic and southwest Indian Ocean basins. Royal Society Open Science 5: 172305. https://dx.doi.org/10.1098/rsos.172305.
(Title from lyrics of “Whale Song” by Partridge Family.)

Applying Deep Learning to Right Whale Photo Identification


Did you know that you can tell individual North Atlantic right whales (Eubalaena glacialis) apart by looking at unique patterns on their head? By recognizing whales as individuals, scientists can answer important questions such: as how old are they? how often do they have a new calf? are the whales seen in Canada the same as those seen in Florida? is the population increasing or decreasing? Scientists at NOAA Fisheries are taking this research a step further and automating the process of whale identification with the help of the crowdsourcing platform Kaggle. Data scientists from all over the world took part in the challenge and applied the latest techniques in the field of machine learning to whale identification.

The winning solution by Deepsense.ai used a series of deep learning algorithms to rotate and crop the image into standardized ‘passport’ photographs and then match them to known individuals with 87% accuracy.  Just like a passport identifies you, these standardized photographs were used to match individual whales to the New England Aquarium catalog. What is unique and exciting about this project is that biologists and data scientists are collaborating to use the latest breakthroughs in deep learning to tackle a conservation problem. The North Atlantic right whale is one of the most endangered marine mammal species in the world and scientists still have a lot to learn. We hope that this new technology will speed up the data processing to more quickly inform conservation efforts. Through our publication in Conservation Biology, we hope to inspire other scientists to use deep learning to increase our understanding of the natural world!

Further Reading:
 
Bogucki, R. , Cygan, M. , Khan, C. B., Klimek, M. , Milczek, J. K. and Mucha, M. (2018), Applying deep learning to right whale photo identification. Conservation Biology. doi:10.1111/cobi.13226

Whose island is it?: The complexities of human-primate interactions in Great Nicobar

Under an overhanging banana tree, with its ripening fruits encased in gunny bags, I sat speaking with an elderly ex-serviceman from Punjab. Surrounded by coconut trees, with dense rainforest forming the distant backdrop to his tsunami shelter on the island of Great Nicobar, he looked out of place in his proud turban. On the contrary, this 11-acre tropical haven has been his home for the past thirty- nine years. While he wears his roots wrapped around his head, he is no longer a ‘settler’, as most people from mainland India tag him and others who first came to the island in the 1970s. He is a local, an islander, who has nurtured his farms and children with the limited resources available to him. The internal conflict pertaining to his identity never leaves, and it resurfaces every time he finds himself surrounded by other ‘locals’ from different communities. Are they one, or many? In a way, each person on the island holds dear two cultures – the one they brought with them when they first came to Great Nicobar, and one that they’ve created together by virtue of islandic isolation.

Introspective turmoil is, however, only one among many challenges these locals have had to face. The longest-residing of these families on Great Nicobar had first set foot on a deserted, undeveloped island during Indira Gandhi’s Prime Ministership in 1969. Apart from a few settlements of the indigenous Nicobarese and Shompen communities, the island and its wildlife were unaccustomed to strong human presence. Over a period of thirty years, these settlers cleared and developed the southeastern stretch of the island. They cultivated rice, grew vegetables and created coconut plantations and orchards. Soon, people from diverse communities migrated to the island with their families in search of employment, sowing the seeds of the heterogeneous community present in Great Nicobar today.

The original occupants of Great Nicobar 
Long before human settlers came to the island, it had been home to a healthy population of the endemic Nicobar long-tailed macaque (Macaca fascicularis umbrosa). They lived a predator-free existence, save for rare encounters with saltwater crocodiles. They mostly ate Pandanus fruit, supplemented by seasonal fruits from the forest, and insects and crustaceans.

As early as 1903, C. Boden Kloss, an English zoologist who traveled the length and breath of the Andaman and Nicobar Islands, spoke of the timid monkeys of Katchal and Great Nicobar. He found that they could, at times, be observed from close due to their innately curious disposition. On most occasions though, Kloss found that attempts to follow troops were a near-futile experience, owing both to the challenging terrain in which they lived and their skittish nature. Kloss noted that these monkeys raided coconut and Pandanus plantations belonging to the native Nicobarese people, often to the point of hampering the growth of more fruit owing to the harm they caused to the trees.


Unfortunately, no one else spoke of these grey, frizzy-haired primates until a whole century later, when a survey was done across the three islands (Katchal, Little Nicobar and Great Nicobar) to understand how they were distributed. Dr. G. Umapathy of the University of Mysore and his team systematically travelled these islands to count the number of troops and monkeys within them, and learn about their basic biology. Today, we’re slowly starting to learn more about these creatures by observing their movement, diet, and behaviour, but the large lacuna in research between the early twentieth and twenty-first centuries has left us with more questions than answers. The islands that are home to these macaques are more accessible now than they’ve ever been before, providing us with an opportunity to study them better. This accessibility, however, has a flip-side and has thrown the islands open to further anthropogenic development and modification of the macaques’ natural habitat.

An attempt to fill the knowledge gap
When I first visited the island of Great Nicobar, I was intrigued by how close the Nicobar long-tailed macaques and people lived. While there may have been a time when these macaques roamed freely through the heavily-forested island, they were now sharing their home with nearly 9,000 human beings – not including those of indigenous communities – with no room for territorial expansion beyond the island’s shoreline. Every person I met steered the conversation towards the macaques’ shenanigans – of how every day was a constant battle of wits with the monkeys. I learned how the monkeys had found their way into the people’s orchards, farms, and homes, raiding their fields and gardens for food regularly.

The overlapping homes and home ranges of these two highly-intelligent primate species had clearly resulted in a wide range of interactions, and I decided to study how these had come to be.

I hoped to piece together the history of interactions between people and the macaques, understand what the nature of interactions between them are at present and unearth factors that had led to a seeming increase in conflict over time. Gathering this information required combining the social sciences and behavioural ecology. Put together, the people and macaques of Great Nicobar helped me understand the sequence of events leading from the settlers’ arrival on the island up until present-day, where they go through life with monkeys in their backyards.

Interactions between human and non-human primates are inherently complex, owing to people’s tendency to anthropomorphise and empathise with their evolutionarily-similar neighbours. The island of Great Nicobar provided an isolated system within which I could study the nuances of these interactions. Here, they are varied in their nature and intensity between macaques and people from different settler communities. Further, being on an island of unusually-high cultural diversity added another layer to the intricacies of conflict.

Given that the earliest academic records of the Nicobar long-tailed macaques were as recent as 2003, I relied on the locals to learn more about the longer history of this interaction.

“All this land once belonged to the monkeys alone”
The coastal vegetation and surrounding evergreen rainforests were first cleared to make room for human habitation from 1970 onward. Each family received 11-14 acres of land for agriculture from the Central Government, which resulted in the clearing of coastal Pandanus clumps to accommodate coconut and areca nut plantations. The southeastern coastline of the island was soon transformed into a developed strip of land, with one family residing every few acres. This pushed the otherwise-coastal macaques further inland or left them sandwiched between villages.

The long-tailed macaques, being new to such development and the dominant presence of human beings, initially maintained a safe distance from them. They feared people but gradually learned to venture into their fields and gardens in their absence. As the years progressed, the development of the island,human population and the macaques’ experiences with people increased. A combination of these factors led to the level of interaction between people and the macaques moving from negligible to noticeable.

The extent of these interactions varied greatly across the island. Some houses and farms, being closer to the forest edge, were more prone to raiding by the macaques. Macaques began entering coconut plantations more regularly, foraging on fruit trees from orchards and raiding paddy fields when left unattended. To combat this increasingly-problematic raiding, people bred dogs and trained them to chase the monkeys away. An arms race began, with people trying newer and more creative ways of keeping macaques away from their produce, and the macaques learning to dodge their efforts. Both species involved were adapting to the dynamic life resultant from living in the other’s presence, and people began to pay attention to the consequences of having set up home in what was once unchallenged monkey territory.

A fragile system, further ravaged by the tsunami of 2004
The tsunami of 2004 caused major upheavals in every avenue, affecting the lives of both humans and macaques on Great Nicobar through landscape modifications and mortalities. The island’s boundaries were altered, submerging crucial stretches of land along the coast. Most settler families that owned agricultural land in these areas lost their only source of livelihood. The long-tailed macaques, whose diet requires a large proportion of Pandanus fruit, were left with very few individual trees along the coast, with different regions and their troops being affected in varying degrees.

Human survivors of the tsunami were rescued and accommodated in the most-developed and least- affected area of the island, Campbell Bay, for nearly five years. It took another decade of sustained relief effort to redevelop the island and relocate the affected families. During this time, the macaques of Campbell Bay found themselves in constant contact with humans, becoming progressively habituated and decreasingly afraid of them. The lack of sufficient natural resources may have led to them supplementing their staple of Pandanus with human-provisioned foods as well. Similarly, in other regions of the island, the macaques learned to make use of abandoned coconut trees and kitchen gardens, and these foods became more common in their diet over time.

The tsunami modified agricultural practices, social structures within human communities, the distribution of human settlements across the island and what the macaques ate. New settlements were built further inland and on higher ground, cutting further into the macaques’ habitat. These factors came together to create an environment ripe for conflict between monkeys and humans, exacerbated by the overlap in their combined need for space and resources.

People’s perspectives towards conflict and on-ground realities
My interviews with the islanders and behavioural observations showed that between 1970 and 2018, the macaques moved from barely interacting with people, to a situation where a quarter of their diet came from human-provisioned resources. Naturally, this led to people facing financial and personal losses. I spoke to these people to learn more about their personal histories, their position on how serious the on- ground situation seemed to them, and to understand the perspectives of the macaques. Did the islanders consider their daily interactions with the black, furry, teeth-baring primates to be ‘conflict’? Each person’s familial backgrounds, geographic positioning, gender and socioeconomic standings affected how they perceived their interactions with macaques.

These perceptions navigated through a wide spectrum of positive to negative. The macaques’ adaptability to human environments and latent politics between different human communities combine in curious ways to make the situation on-ground more layered than visible on the surface. Adding another fascinating layer, people’s anthropomorphism towards these human-like creatures and stories of the monkey god, Hanuman, greatly influenced the manner in which they dealt with conflict scenarios. In a country like India, where mythology has seeped into each home imperceptibly, it’s hard to disentangle the effect it has had on people, of any religion, and their outlook towards the garden-raiding Vaanars they see.

Even in regions that faced extremely low levels of macaque visitation, as I found through a citizen- science initiative across the island, people still felt a keen frustration towards the monkeys. All these factors came together to either increase or set at ease people’s sense of loss at the hands of the monkeys. Finding these intricacies within an island so culturally and economically diverse made me believe that solutions to combat the rising conflict need to be well-informed and accommodating of its complexities.

Intricately, innately grey
Delving deeper into the complexities of why these interactions exist and the various permutations in which they are dealt with could fill pages of asympathetic book. The chapters therein would cover the island’s history, the macaques’ biology, the game- changing tsunami of 2004, the steady development of the island, the different cultures of each community and the indigenous people, and detailed descriptions of what one may observe taking place today. A book, an article or an academic paper, however, would be suspended in time, a snapshot of a constantly- adapting land. Any author would struggle to pick a side while narrating the history of this islandic system, so far removed from our mainland. These interactions are entwined in ecological history and the nuances of anthropology, making the onset of conflict between two species like these more intriguing with each layer unearthed.

That elderly, Punjabi man I mentioned at the start, sat under his banana trees, fruits shielded from the monkeys, and spoke with sparkling fascination about their intelligence. Moving quickly beyond his description of the economic losses that the monkeys had caused him by destroying over 70% of his annual coconut harvest, he lost himself in a narrative of how the monkeys have learned to avoid every obstacle he placed before them. Despite his daily tussle with them and the frustrations of being ‘stuck’ on that inescapable bit of land floating in the Andaman Sea, he still found room in his wise, old heart to marvel at their antics.

Of course, it isn’t every family that can afford to smile at their losses. People have deep-set reasons to justify their love for and apprehension of the macaques, sometimes both simultaneously. I have learned not to label their interactions with these curious creatures as ‘conflict’ anymore, unless characterised as such by the people themselves. I am a mere spectator, who has attempted to describe this system to the best of her ability using a combination of tools. When each person views the monkeys through a different lens, chiselled down by personal experience, who am I to pin an overarching negative connotation to their lives?

These interactions are dynamic and vulnerable to change. Our first step should be to understand the reasons for that change. Currently, human and macaques on the island of Great Nicobar are in transition-moving from co-existence to semi-harmonious co-occurrence. If we are lucky, with the right tools and the inclination to describe all aspects of the ‘conflict’ at hand, we could work towards curbing its escalation and safeguarding the wellbeing of all animals involved-human or otherwise.

This article is from issue

13.1

2019 Mar

Editor's Note-Slow Conservation

Conservation science has long been seen as the domain of trained professionals. At CC, we have long acknowledged the role of indigenous knowledge, and published a special issue on the topic in 2013. We engage with this issue by visiting a fascinating project in the Nilgiris, a collaboration between Keystone Foundation, a local NGO and Cornell University, USA. Steven Wolf et al. provide an overview of the project which attempts to integrate research and practice towards conservation and sustainable development. Their article is linked to seven research pieces (online only) written by seven by pairs of student researchers including an undergraduate student from Cornell and a young Adivasi community member from the Nilgiris.
Kartik Shanker

Can only a few plants can make pollinators happy?


Habitat destruction and fragmentation are leading causes of biodiversity loss on the planet. Pollinating insects, in particular, have recently suffered major losses due to agriculture and development. This is nothing new, but governments in Europe are now taking active management strategies to help buffer insect populations around agricultural areas. For example, many European countries are using Agri-Environmental Schemes (AES) that include construction of field margins and pollinator fields to provide protein and nectar sources to useful insects. Studies have shown that AES can increase the number of pollinator species, but it isn’t clear how many plant species need to planted to facilitate these increases. For example, some plant mixes have many plant species whereas others have fewer ones, but scientists generally do not know if there is a simple positive relationship between plant numbers and pollinator numbers.  

Yarrow (Achillea millefolium) – one of the plants that attracted the most pollinators in Warzecha et al. (2017)
Photo: Petar Milošević

To answer this question, Warzecha et al. (2017) tested if increases in plant species led to an increase in pollinators or if a few main plant species were responsible for most of the increases.  Four different AES seed mixes were planted in a large field and replicated four times – the researchers then conducted weekly pollinator surveys and identified plants that were visited. The entire experiment took place at the Justus Liebig University of Giessen in Hesse, Germany.

There was no clear association between the number of plant species in a mix and pollinator species number. In fact, one of the mixes with the fewest number of plant species had the highest number of bee species.  Instead, the authors found that only four key plant species could provide resources to about 80% of the pollinator species. Interestingly, only 14 plant species in total could provide resources for all pollinator species.  It is important to note that these findings are for only a particular region in Germany, and may not apply to other sites with different types of pollinators.
This research is important in creating specialized plant mixes for different regions. For example, it might be more efficient to choose a few local native plants for a mix versus a general mix that contains 50 plant species, many of which may not help native pollinators. Of course, detailed information is needed about the local flora in order to make a specialized mix, but the effort may well offset the cost of purchasing unnecessary seeds.


Further Reading: 

Warzecha, F., Diekötter, T., Wolters, V., and Jauker, F. 2017. Attractiveness of wildflower mixtures for wild bees and hoverflies depends on some key plant species. Insect Conservation and Diversity. doi:10.1111/icad.12264

Invasive species deniers: should we be worried about them?


The denial of scientific evidence and consensus is a growing global concern, demonstrated perhaps most clearly in debates over climate change. Science deniers are rightly chastised for their attempts to prevent progress on pressing social and environmental issues. But allegations of science denial must be well-founded or they risk eroding public trust in science and scientists.

Recently, a few invasion biologists claimed that 67 writers and researchers were ‘invasive species denialists’ – that they rejected the consensus that some introduced species cause harm. These claims were published in a reputable science journal. But being familiar with the work and perspectives of many of the accused, we were sceptical of the claims, and so we re-evaluated the evidence for the accusations.
Our results showed that the allegations of invasive species science denialism were misplaced. None of the accused was found to dispute scientific facts. Further, only a few of the articles we reviewed contained text consistent with science denial. How could the accusers have got it so wrong?

Two reasons. First, the accused all variously disputed the cultural value judgements that underpin the science of invasion biology. Their accusers misinterpreted this as a denial of facts when it was really just a robust critique of the subjective assumptions that the discipline of invasion biology is built upon. Second, we think that the accusations reflect a lack of open-mindedness by some invasion biologists. Are they welcoming to new ideas and critique from other disciplines? Do they encourage a diversity of contributions, including from non-scientists? We found that there was room for improvement in how some invasion biologists relate to those with other experience and expertise.

So, should we be worried about science deniers? Yes, but not so much in invasion biology. We should also be wary of attempts by some to use the label of ‘science denial’ to shut down the valid criticisms and productive contributions of others.

Further Reading:

https://onlinelibrary.wiley.com/doi/10.1111/cobi.13278

The importance of bees and shade grown trees in the coffee plantations of Kodagu.

Coffee is the second most traded crop in the world, after crude oil. It is worth 70 billion in the global retail market. India contributes to the market, being the 7th largest producer of coffee in the world with Brazil being the largest producer in the world. In India, Karnataka is the largest coffee-producing state. Kodagu and Chikmangalur being the two important coffee producing districts.



Coffee is usually grown under dense shade trees. This is why the coffee agro-forests are considered an important refuge for biodiversity. Many bees, birds and small mammals are sighted in these plantations.
Smitha Krishnan’s PhD thesis aims to assess the contribution of bees to coffee production in Kodagu. Bees are important pollinators and play a vital role in producing many crops, including coffee.
There are two types of coffee predominantly being cultivated: Coffea arabica and C.robusta. This study focuses on the robusta variety which contributes to 81% of coffee production in Kodagu.  Robusta is cross-pollinated by wind and insects, of which bees are the largest contributors. The study indicates that the contribution of bees to fruit set is 33% (67% by wind). Bees are also important in enhancing the quality of the fruit and enhancing pollination success. The results of the study show that Apis dorsata (Giant rock bee), Apis cerana indica (Asian honey bee) and Tetragonula iridipennis  (Indian stingless bee) are the main pollinators of coffee.



The studies compared fruit set between wind-pollinated flowers and open-pollinated flowers (flowers pollinated by wind and insects), the results indicated flowers that were open-pollinated had twice the number of pollen grains than wind-pollinated flowers. Bees contributing to 33% of fruit set.  
The study says Apis dorsata or the rock bee, which is the largest contributor of insect pollination, nests in large native trees with horizontal branches. These trees are increasingly disappearing due to change in management techniques in coffee agrosystems. The protection of such trees will contribute to a continuous and steady coffee yield.



Further Reading

  • Smitha Krishnan’s PhD thesis.
  • Krishnan, S. and Ghazoul, J. (2012) Importance of bees, shade trees and forests in coffee production in Kodagu. Indian Coffee. Vol. 76, No. 1 pp.10-12. ref.9
  • Krishnan, S., Kushalappa, C., Shaanker, R., & Ghazoul, J. (2012). Status of pollinators and their efficiency in coffee fruit set in a fragmented landscape mosaic in South India. Basic And Applied Ecology13(3), 277-285. https://doi.org/10.1016/j.baae.2012.03.007
  • Krishnan S., Cheppudira K.G., Ghazoul J. (2017) Pollinator Services in Coffee Agroforests of the Western Ghats. In: Dagar J., Tewari V. (eds) Agroforestry. Springer, Singapore. https://doi.org/10.1007/978-981-10-7650-3_32

 

 

Pathogenic Fungus on cicada


It is a Pathogenic Fungus on the Cicada that infects and kills the insect.
Many cicada species suffer from fungal pathogens belonging to the genus Massospora. These fungi destroy the reproductive organs of males and cause them to behave like female cicadas — in the case of Magicicada cicadas, they flick their wings instead of singing — and they attempt to mate with other males, thus spreading the fung

Knowing, Knowing, Known: Local ecological knowledge and biodiversity conservation


Local ecological knowledge (LEK; also known as traditional or indigenous ecological knowledge) includes the understandings, beliefs, and practices that human societies accumulate during experiences with their natural environment. Such knowledge has always been dynamic, evolving in tandem with ecological and social change. But LEK may be in decline as its most common custodians, rural and indigenous communities, are transformed socially and economically.

Researchers Shankar Aswani, Anne Lemahieu and Warwick H. H. Sauer reviewed studies from around the world to understand the factors that are causing LEK to change and the direction of change. They read 92 papers about studies from 50 countries, with most describing the loss of traditional knowledge and a small proportion describing its persistence or transformation without loss. Studies reporting a decrease in LEK among its study population attributed it to generational loss, modernisation, market integration, globalisation, and Western-style education. In general, LEK loss was more likely to occur among women than men. Declining LEK will most likely have the greatest impact on indigenous communities who rely more heavily on natural resources for their culture and livelihoods, and who may have a more urgent need to identify and respond to environmental unpredictability. The potential loss of LEK also has implications for biodiversity conservation and management plans which utilise it.

Integrating science and local knowledge into resource management may help to preserve LEK, as well as safeguard biodiversity and the cultural rights of indigenous peoples who should be involved in decision-making. The authors recommend that greater efforts be made to document LEK and its change over time before the knowledge is transformed, or lost to us, forever.
 

Further Reading:

Aswani S., A. Lemahieu & W.H.H. Sauer (2018) Global trends of local ecological knowledge and future implications. PLoS ONE 13(4): e0195440.

The Rediscovery of an Antique: the Dinosaur Ant

The searing heat of the Australian outback evaporated into the night and a chill descended, sinking deep into the hollows between the mallee trees which surrounded the impromptu camp. Bob Taylor had itchy feet. Not because of his desert boots (although perhaps that too), but because he was itching to begin his search. In a way, it had been over 40 years in the offing and this unplanned delay was trying on the nerves. What he sought was out there, somewhere, in the darkness.

Rewind 100 million years (or thereabouts). Plodding and prowling, munching, crunching, and soaring, the dinosaurs were in at the height of their reign – the largest creatures ever to walk to the surface of the Earth. Meanwhile, at the other end of the size spectrum, small solitary wasps were embarking on an interesting evolutionary experiment. Their anatomies were undergoing small changes, while at a social level, sisters were beginning to cooperate to raise their young. They were evolving into the first ants.

From those early beginnings, ants have become one of the most successful and diverse families on the planet. Scientists have identified around 13,000 species so far and it is thought that there are likely many more thousands yet to be discovered. And there is huge variation among these species. Take body size – there is as much difference between the largest and smallest species of ant, as there is between a human and a blue whale. Individuals of one of the largest species, the giant forest ant (Camponotus gigas), are more than 2.5 cm in length. At the other end of the size range, Carebara atoma are so small that an entire colony would easily fit inside the head of the forest giants.


Ants have also evolved into extraordinarily complex societies, dividing tasks between individuals, ‘farming’ for food, and even depositing their waste in refuse dumps and carrying their dead to special areas away from the colony. But there is variation here too. The social complexity of some species is relatively simple and colonies may contain as few as 10 individuals. Meanwhile, some super-colonies contain more than 300 million individuals, each playing their part in sustaining the life of the colony.

But how did such variation and complexity evolve? In biology, it is commonly assumed that complexity must have evolved from simple beginnings. So in the case of ants, it would be predicted that the first species would have relatively small colonies and simple social systems. However, actually showing this is difficult – how do you study species that were around during the time of the dinosaurs? The answer is – find a ‘Dinosaur Ant’…

So back we go to Bob Taylor and his itchy feet. It is 1977 and Professor Taylor, an Australian myrmecologist (ant researcher), was embarking on just such a search – a Dinosaur Ant hunt. Back in 1931, an expedition across the deserts of Western Australia had brought back two specimens of a previously unknown ant species. These were pickled in alcohol and given to the National Museum of Victoria in Melbourne. Named Nothomyrmecia macrops, there they sat for years before a leading ant specialist finally recognised their importance. Their bodies suggested that they might come from a species very similar to the very first ants. If a living colony could be found, they could be studied and we might learn more about the origins of the multitude of species living today. A number of expeditions went back to the original discovery site, but all failed to find anything. Eventually, rediscovering the Dinosaur Ant became the Holy Grail of myrmecology, and Professor Taylor, then chief curator of the Australian National Insect Collection made it his mission to find The Grail.

An expedition was organised, which would drive from Taylor’s base in Canberra in the far East of Australia, over 3000 kilometres to the original site where the Dinosaur Ant specimens had been found, near Esperance in Western Australia. However, with over a thousand kilometres still to travel, problems with the vehicles forced the expedition to make camp in an area of bush close to the small town of Poochera. After darkness fell, Bob decided to take a stroll and after only 20 paces, let out a yell (his language, of course, must be excused – he was very excited and very Australian!). “The bloody bastard’s here! I’ve got the Notho-bloody-myrmecia”. He had found a Nothomyrmecia worker, wandering up a tree trunk, only yards from where the trucks had broken down. Over subsequent years, it was found that Nothomyrmecia did indeed have small colonies, and a form of sociality much simpler than that seen in many modern species. It seemed that this truly was the Dinosaur Ant – a missing link back to the very first ants to roam the Earth, 100 million years ago.


So what can we learn from this? Perhaps that all things really do have simple beginnings, that breaking down in your car can have its upsides, and that letting itchy feet, or a tingle in the bum, push you out of your seat to go exploring, can lead to some wonderful discoveries.

References

  1. Hölldobler, B. & Wilson, E.O. (1994). Journey to the Ants: A Story of Scientific Exploration, Harvard University Press, Cambridge, MA, 1994.
  2. Jaisson, P., Fresneau, D., Taylor, R. W. & Lenoir, A. (1992). Social organization in some primitive Australian ants: (1) Nothomyrmecia macrops. Insectes Sociaux. 39(4), 425-438.
  3. Li Vigni, Ignazio. (2014). PhD Thesis: Interactions between ants and diaspores of flowering plants (myrmecochory) in Sicily (Southern Italy): an important ecosystem function of the Mediterranean basin.
  4. Orr, A.G. & Charles, J.K. (1994). Foraging in the giant forest ant, Camponotus gigas (Smith) (Hymenoptera: Formicidae): evidence for temporal and spatial specialization in foraging activity. Journal of Natural History. 28(4), 861-872.
  5. Taylor, R.W. (1978). Nothomyrmecia macrops: a living-fossil ant rediscovered. Science. 201, 979-985.
This article is from issue

12.4

2018 Dec

The turtle and I

 
I wandered lonely ‘pon the shore
A windy night with restless seas,
When all at once I saw a score,
A swarm of nesting olive ridleys
Upon the beach, beneath the moon
A lumbering, bumbering turtle typhoon
 
Whose turtles these are I think I know                                                                                
I thought they were in Gahirmatha though;
They won’t mind me standing here
And watching them nest ungainly and slow…
 
I tagged a turtle with great care,
It swam away, I know not where;
For so effortlessly it glided,
All its tracks were elided. 
Long, long afterward, on a beach
Someone found it, once more within reach.
Upon reading the tag, she wrote to me:
‘Tis the turtle that has the measure of the sea.  
 
How do I study thee? Let me count the ways
I track thee to the depth and breadth and height
My telemetry can reach, when you dive out of sight
For the ends of science across the bays.
I follow thee through almost every twist in the maze,
Data columns to be filled in by months and by days
A fierce need, by moon and torch-light
I obsess over thee, and for authorship will fight.

Tonight I can write the saddest lines
Write, for example, “The dogs entered the hatchery
And now my paper on TSD has receded into the distance.”
The turtles no longer come ashore and nest.
Tonight I can write the saddest lines.
I watched them every night, and sometimes they watched me too.
Through the months, I collected their eggs carefully, gently
I counted them repeatedly under the starry skies.
They watched me sometimes, and I watched them too.
How could one have foreseen the eggs were all destined to die.
 
Somewhere I have never travelled, dived beyond
An unimaginable depth, your flippers move in silence:
In your most mundane movements are things which enthrall me
Or which I cannot fathom because my text books fail me.
Your slightest shift will easily confuse me
Though my mind is closed by science, as a clam’s
You bewilder always slowly, subtly as an underwater current
(tugging, pulling, carrying) a little hatchling.

 
 

This article is from issue

12.4

2018 Dec

How Cameras are Helping Whale Shark Conservation


In the summer of 2016, I volunteered with a small group of fellow field researchers to collect conservation data on whale sharks in Baja California, Mexico. Our conservation data was collected with cameras, waterproof slates for documentation of data, and measuring tape to measure the length of the whale sharks we encountered. All of our cameras varied in style and price, from a GoPro to a cell phone inside a protective underwater sleeve. We each used our own underwater camera to capture photo-identifications of various whale sharks in the Sea of Cortez. Once a whale shark was spotted near our small fishing boat, a few of us would slowly enter the water and swim towards it. Submissions of photo identifications have to remain raw images and cannot be zoomed, cropped, edited, or altered in any way, since it affects the integrity of the data. To capture Figure 1 accurately, I had to swim closely and calmly alongside the whale shark while steadying my camera to record an effective photo identification. While two of us photographed the shark, another researcher would swim underneath the whale shark to record its sex. We quickly measured the length of that whale shark with measuring tape or against the length of the fishing boat and reassembled it on the boat to record our data onto the slate. As Figure 2 highlights, the data collected consisted of sex, length, and any identifiable markings. If a whale shark had noticeable identifiable markings, such as a boat injury to the dorsal fin as seen in Figure 3, this was also photographed as data. Once back on land, we uploaded our data onto a computer and submitted it to Wildbook for Whale Sharks.

Figure 1. Photo-identification of a female whale shark on her right flank
Figure 2. Photograph of the rough data chart recorded on the boat
Figure 3. Photograph of an injured dorsal fin

Whale sharks are the world’s largest living fish although little is known about them. Whale sharks ( Rhincodon typus) are the largest fish in the world, estimated to reach lengths between 35 – 55 feet. The whale shark is a pelagic, migratory species that is found worldwide in tropical waters. They are filter feeders, which means as they swim they suck in water through their large, 5-foot wide mouth and filter out plankton. Whale sharks have around 300 tiny teeth within their mouth, but the purpose of their teeth is still a mystery. The whale shark gives birth to live young, although the average number of pups born in one litter is still relatively unknown. There is little to no information on key aspects of whale shark biology, such as breeding habitats, lifespan, reproductive/growth rates, basic behavior, and pup survival rates. Recently, the International Union for Conservation of Nature, IUCN, Red List of Threatened Animals has updated the whale shark conservation status from vulnerable to endangered. Conservation policy depends on biological, ecological, and demographic data of a threatened species, which in this case is complicated since little is known about the whale shark to enact worldwide conservation laws. Reliable existing data do not currently exist on whale sharks, which threatens their worldwide conservation status. To protect the whale shark, more data is currently being collected through the use of cameras.

Cameras and Photo-Identification Cameras capture more than daily moments in our lives, they also have emerged as an innovative and important tool in the field of conservation. Cameras are being utilized to capture photo-identifications of whale sharks. Photo-identification is a form of mark-recapture and is used to record an individual animal’s natural markings. Photo-identification only tags the animal by photographing it, not physically restraining and marking it. Photo-identification is also a permanent method since the whale shark’s pattern will never change. Mark-recapture studies are possible when an animal can be physically marked and then recaptured and identified, later in the future. This process produces sufficient data that can be used to estimate a species survival rate, migratory pattern, and demographic data. Unfortunately, conventional tagging of whale sharks has been relatively unsuccessful.

Whale sharks are an optimal species for photo-identification tagging since they are difficult to mark-recapture due to the physical tags falling easily off of them. Whale sharks have their own unique spot patterns behind their gills, similar to a human’s fingerprints, and these are the natural markings that are used for photo identification. In the beginning, the number of photographs for photo-identifications of whale sharks was fairly small and the photographs of their patterns were only matched by trained professionals through the naked eye. But, as photo-identification photographs from research studies increased across the globe, Australia, Belize, Mexico, and Africa, the number of photographs exceeded the number of “reliable eyes” that could match the patterns. Photo-identification has proven to be an effective application in the conservation/management of wildlife population demographics. The largest strength of photo-identification is that it allows researchers to track and monitor wildlife without physically catching and tagging the animal. Even with the slightest form of temporary marking, the process of physically catching an animal can affect the animal’s behavior.

Pattern-matching Algorithm Software System Wildbook for Whale Sharks is a public photo-identification library on whale sharks where people upload their photo-identification photographs. This website boasts a software system that has been developed from an algorithm originally designed for astronomy for star pattern recognition, see Figure 4, to recognize the unique patterns of individual whale shark markings.
A collaboration between whale shark biologists, Ben Norman and Jason Holmberg, and NASA astrophysicists Zaven Arzoumanian and Ed Groth, who created specialized algorithms for the Hubble Space Telescope, created a pattern-matching algorithm software system that compares two lists of coordinates ( x, y ) that identifies individual points to form a geometric pattern within the spots of the whale shark pattern.


Figure 4. Astronomical pattern comparison algorithm example (from Arzoumanian, Z., Holmberg, J. & Norman, B., 2005)

The field of conservation has benefited greatly from technological advancements, such as cameras and software systems, and from new methods for communication of data among researchers. Cameras have proven to be an effective conservation tool from photo-identification of species, such as whale sharks, to camera traps and camera drones. Cameras are used in tracking wildlife, studying animal behavior, identifying migration patterns, monitoring survival rates, management of population demographics, and preventing illegal poaching of endangered animals. Photo-identifications of whale sharks will be used to gather more information on the species, from population demographics to migration patterns, to protect and update its worldwide conservation status. Cameras have always been an entertaining way to capture the daily moments within our lives, but cameras are also an essential tool in the conservation and the survival of magnificent species, such as the whale shark.

All photographs taken by Talia Nicole Tamason, © 2016 Talia Nicole Tamason

Further Reading:
Arzoumanian, Z., Holmberg, J., & Norman, B. (2005). An astronomical pattern-matching algorithm for computer-aided identification of whale sharks Rhincodon typus. Journal of Applied Ecology , 42 (6), 999-1011.

Holmberg, J., Norman, B., & Arzoumanian, Z. (2009). Estimating population size, structure, and residency time for whale sharks Rhincodon typus through collaborative photo-identification. Endangered Species Research , 7 (1), 39-53.

Speed, C. W., Meekan, M. G., & Bradshaw, C. J. (2007). Spot the match–wildlife photo-identification using information theory. Frontiers in Zoology, 4 (1), 2.

 

This article is from issue

12.4

2018 Dec

The Life and times of an intrepid biologist: An interview with George Schaller


Q). What are your most striking memories from your time in Kanha?

My wife Kay, two very young sons, and I lived for over a year in Kanha at the edge of a beautiful maidan in a bungalow that the government of Madhya Pradesh had generously allowed us to use. There we could observe chital, blackbuck, gaur and other species, and at times a tiger passed by our bungalow.  I had learned to recognize the resident tigers individually by the stripe pattern on their face, and every meeting with an old ‘friend’ added data and pleasure to the project.

Q). How & why did you decide to work in India?

I had completed a mountain gorilla project in the Congo. The Johns Hopkins Center for Medical Research and Training, based in Baltimore and Calcutta, had an ecological unit which they asked me to join, and from late 1963 to 1965 we moved to India. Having read many shikar books about India, I was eager to actually study the actual lives of the various species.

Q). Could you share a couple of your experiences that have left an imprint on you from your time in the field?

Animals tend to be shy because people have made them afraid. I treasure experiences in which animals accept my presence without fear. Meeting a mountain gorilla group day after the day, the animals accepted me to such an extent that I could sleep near them while they were on their nests at night and one day a female climbed a tree, which I had ascended to observe them better, to sit beside me on a branch.  Earlier this year, I was in Argentina, where on a ranch a group of capybara, the world’s largest rodents, an animal weighing 100 pounds, surrounded me within touching distance as I reclined among them. Such instances lift the spirit.

Q). Was conservation always the motivation for your research or it came about later your life?

I enjoy watching animals, delve into their lives.  My early studies on gorillas, tigers, and lions were mostly in national parks where they and their habitats were fairly well protected. But even in the 1960s, I became well aware of the conflicting demands of conservation, development, and the livelihood of local people. In recent decades, I have focused more on species and conservation issues both inside and outside of reserves, on whole landscapes.  

Solid scientific information is essential to protect and manage a species or area on a long-term basis.  Without good information, government departments may out of ignorance or political expediency pass regulations and laws that actually harm the environment. One of my aims in recent years has been to offer data to governments on specific issues that may help them in making decisions.

Q). I am sure there wouldn’t be one solution but what would be your blueprint for conservation?
Mahatma Gandhi had two precepts that need to be in every blueprint for conservation:

  1. a) “There is enough in the world for everyone’s need but not enough for everyone’s greed;” and b) “You have to be the change you want to see in the world.”

Q). Problems of hunting/poaching are many-a-times linked to issues of food security or livelihoods/sustenance, how do you think developing countries should look at this issue?
Some illegal hunting is simply to make money by a few individuals or organized gangs.  A good example is the killing of tigers in India for the trade in traditional medicines, especially to China. It’s a matter of law enforcement at all levels, yet in country after country– Cambodia, Laos, Vietnam, Myanmar—the flaming beauty of the tiger has vanished or will soon do so. The days of when the Maharaja of Surguja could brag about having killed 1150 tigers are gone, but India now has fewer than 2000, and with carelessness it could lose those as well.  And then there is the mass-killing of the Tibetan antelope or chiru on the Tibetan Plateau in China to which India contributed for years by processing the fine wool of the animal to weave the ultra-fine shahtoosh shawls in Kashmir. The wool of some 300,000 chiru was for years illegally imported into India since the 1980s and knowingly processed before anything was done to halt it. The trade continues at a reduced rate.

The world’s religious community has been surprisingly negligent in promoting conservation.  Every imam, minister, monk, and other should constantly emphasize that the ecological crisis is a moral issue, that all species have a right to exist, that the earth has limits that are being reached.  The religion which is most explicit about conservation is Buddhism: “Kindness to all living beings is the true religion.”

The various faiths best become partners and vigorously promote the survival of humanity and all living beings on this small and fragile planet.  Equally negligent in promoting conservation have been the media, the newspapers, magazines, radio, TV, or social network. The average Indian newspaper has several pages of cricket and no news about the environment. Worldwide, newspapers say little about the environment, whether we talk of small-town newspapers or the New York Times.  Every newspaper, for example, should have at least one page daily on the environment, both good and bad news, to raise awareness about the beauty of the land and its problems and to arouse compassion and respect for animals and plants. The public needs to be more aware of its natural and cultural heritage and not be seduced by proclamations of endless growth, by GDP (which does not measure destruction and the death of nature), as currently promoted in India and the USA.  Those who vote must think of the future.


Q). Problems of hunting/poaching are many-a-times linked to issues of food security or livelihoods/sustenance, how do you think developing countries should look at this issue?

Some illegal hunting is simply to make money by a few individuals or organized gangs.  A good example is the killing of tigers in India for the trade in traditional medicines, especially in China. It’s a matter of law enforcement at all levels, yet in country after country– Cambodia, Laos, Vietnam, Myanmar—the flaming beauty of the tiger has vanished or will soon do so. The days when the Maharaja of Surguja could brag about having killed 1150 tigers are gone, but India now has fewer than 2000, and with carelessness, it could lose those as well.  And then there is the mass-killing of the Tibetan antelope or chiru on the Tibetan Plateau in China to which India contributed for years by processing the fine wool of the animal to weave the ultra-fine shahtoosh shawls in Kashmir. The wool of some 300,000 chiru was for years illegally imported into India since the 1980s and knowingly processed before anything was done to halt it. The trade continues at a reduced rate.

In the rainforest of Amazon in Brazil where I have, in the recent years. been working, some indigenous tribes kill wildlife to eat because there is little other protein. But they, as well as settlers and some missionaries, sell the meat and hides in town to make money, and this makes any management of wildlife resources on a sustained basis impossible.  

Actually in working with communities one can, as has been shown, regulate hunting and make it sustainable.  There are options in offering income, such as paying local people to patrol and protect the land from intruders, local handicraft industry, resettlements with jobs and so forth, depending on the local situation. Whatever is done, government departments, NGOs, scientists, and communities need to collaborate to find solutions. Ultimately, however, no matter what the laws or implementations, it is the communities who will determine their tomorrow by truly working together to protect and manage the health of their land, and in a peaceful manner confront any issue that threatens their environment such as an unnecessary road, dam, timber operation, or other.

Q). How is it to work with different governments? Are politicians/bureaucrats the same across cultures/countries?

Politicians and bureaucrats are much the same everywhere, much concerned about retaining power and not making what might be considered a wrong decision. Few at the highest level of government have great interest in or concern for the environment—Indira Gandhi was an exception—but I have usually found officials in almost every of the 30 or so countries where I have done fieldwork who cared and were supportive. A new generation or two has had ecological training in India, as at the Wildlife Institute of India in Dehradun and the Centre of Wildlife Studies at the National Centre of Biological Sciences in Bangalore, or at overseas universities. This has created a core of dedicated and knowledgeable conservationists of great benefit to India.

When I visited, for example, the Kaziranga and Pakke national parks in 2017, I was much impressed by the directors and their staff who not only conduct research but also involve the surrounding communities in conservation, as well as providing the benefits in the form of a percentage of the park entrance fees paid by tourists.  China, where I have worked annually since 1980, has made tremendous progress, training many conservation biologists in the country and abroad, setting up protected areas, and creating management plans for critical areas to reduce the ecological impact in cooperation with communities.

My main goal, now as always, has been to help the country if possible by collecting information that in some way can be of use to conservation.  
 
Q). When it comes to policy or laws, a country like India has some of the best legal frameworks but dismal implementation. How do you think this affects conservation/protection and what should be rectified?

Governments at all levels everywhere have to decide if they want an environmentally healthy future for their people. An excuse always is a lack of money. But it’s a matter of how the available money is spent, the environment being usually of low priority.  The public needs to be educated, and that’s a job of schools, churches, and other such institutions– and the media. And then the public must pressure the government to change, amend, or implement the laws for the future benefit of everyone, not just corporations and other ‘big businesses’ which are all too successful in buying what they want from politicians and bureaucrats. Easier said than done! But be aware of what is happening. Brazil, for instance, is planning to build 304 dams on the rivers of the eastern Amazon, a development that will have a huge impact on everything from climate to new roads, settlers, destruction of forests, and others. Of these, 46 dams have already been built. Responses to these plans have been surprisingly muted.


Q). Where do you see the world is headed in the next 50 years?

In the last 50 years, we have used up more of the planet’s resources than in all previous history.  We tend to forget three matters:
Every personal act is also an ecological act with an impact on the environment, whether we drink a cup of tea or send an email. Everything in nature is connected and interrelated, indicating that we can not address anything in isolation. Everything we make, buy, need, and use comes from nature, and at the rate, we are continuing to destroy things mindlessly makes me wonder if there is intelligent life on earth. So we best not plan the future as in the past, and it’s certainly ours to improve or lose all.
 

 

This article is from issue

12.4

2018 Dec

Half-Earth is Half-Hearted: Make way for Thanos and The Half Universe

Megademophobia – fear of overpopulation – has a lot to answer for. Malthus is serious enough, Ehrlich almost as bad. But now there is new problem: Marvel’s Infinity Wars. This film spectacularly unites multiple comic book heroes in an orgy of destruction which culminates in the annihilation of precisely half of the people in the Universe (including many of the weirdly abled protagonists). And all this because the Bad-guy-in-chief, Thanos, fears that overpopulation causes too much suffering.

But is this the first time this idea has been circulated? A few years ago, EO Wilson, one of the most prominent biologists of the 20th century, and an evangelist for conservation, came up with the idea of Half-Earth: the notion that half of earth was to be set aside for nature. This is based on the principle that humans are not part of nature, and that for the Earth to be able to preserve its biodiversity and sustain itself, humans had to be removed from one entire half of it.

Despite the similarity of these ideas, we don’t think that the Marvel script writers are half-earthers, or that Wilson is a secret Avengers fan (unless of course of Antman). The filmmakers and conservationists are no doubt independent, original thinkers. No one has copied anyone else.

But our views are not so important here. We understand that an irate Half-Earther has been pressing the Half-Earth movement to sue Marvel comics for plagiarism. This is, of course, absurd. First, there is no plagiarism. Second, never pick a fight with Thanos. So we would like the Half-Earth movement to distance itself from such foolishness, and release the following statement:

The Half-Earth movement would like publicly to disassociate itself from any resemblance or comparison with the Marvel film Infinity Wars. Thanos’ evil plot to destroy half of all human life, and our own cunning plan, have nothing in common. They share no affinity. Any sane observer could tell that one of these plans is a complete fantasy. It is socially (not to say politically) illiterate. It disregards the lived fabric of our lives and the role of people in creating life around us. It is only possible to conceive with new advances in computer modeling. No prizes for guessing which one that is.

Just to underline the point further we would like to point out a few of the balmier elements of Thanos’ plan compared to our own. Thanos vapourised a random half of the universe. Our plan will deliberately target the places where poorer people live. It is cheaper to move them. It is politically safer to leave the rich alone. Thanos only appeared to have human interests at heart when he abolished half of life. Our plan is not about people. It will make life better for the richer half of humanity, but, more importantly, it will also make sure that these people can continue to enjoy the best ecosystem services and the biodiversity that their wealth deserves. Also, Thanos was utterly uncompromising. We are vague and ambiguous when it comes to what sort of life will be possible in the half where people are not around.

So there is no similarity whatsoever between Thanos’ evil plan for domination and our own hopes to clear the land of people who get in the way of our understanding of nature.

To avoid all possibility of doubt we would also like to point out that none of us cheered at the end of Infinity Wars. We have not we named any of our offspring or pets ‘Thanos’ in appreciation of his achievements. Nor do we gain any succour from news that an intergalactic message has been intercepted from one Zaphod Beeblebrox to Thanos indicating that to, due to a clerical error, the wrong half was destroyed and would he accept a further 25% reduction to life in the Universe, at discounted rates?


We hope that this press release will erase all possibility of confusion and allow the rest of us to get on with the business that matters – halving all known cases of megademophobia.

This article is from issue

12.4

2018 Dec