The so-called High Seas Treaty is a legal framework for the protection of marine biodiversity and responsible and equitable use of resources of areas beyond national jurisdiction (BBJN). Its draft, published on the 5th of March 2023, is the outcome of two decades of negotiations, and is part of the international effort to protect a third of the world’s biodiversity by 2030.
An unwavering dedication to the protection and conservation of biodiversity will be required to see the firm landing of this hopeful step.
On this occasion, we look back at some impactful studies published in our journals that have made waves, hopefully in the right direction towards impactful conservation measures and actions.
Following President Barack Obama’s expansion of the largest permanent Marine Protected Area on Earth (Papahānaumokuākea Marine National Monument) in 2016, a new species of coral-reef fish was named in his honour. The fish is the only known coral-reef species to be endemic to the Monument, and, despite its small size, it carries wide-reaching cultural and political significance as a reminder of how politics go hand in hand with science.
Former President of the United States, Barack Obama, arriving on Midway Atoll Midway on September 1, 2016 to commemorate his use of the Antiquities Act to expand the boundaries of the Papahānaumokuākea Marine National Monument. Dr. Sylvia Earle gives President Barack Obama a photograph of Tosanoides obama on Midway Atoll, from the film “Sea of Hope: America’s Underwater Treasures” premiered on National Geographic Channel on January 15, 2017. See also the news story on National Geographic.
Other studies from our flagship zoology journal ZooKeys have focused on the benthic megafauna and abyssal fauna of the Clarion-Clipperton Zone (CCZ) in the Pacific Ocean.
The Clarion-Clipperton Zone, managed by the International Seabed Authority, has been targeted by deep-sea mining interests. In the context of heightened concern over potential biodiversity loss, scientific research is crucial for informing policy-makers and the general public about the risks and outcomes of such initiatives.
The Clarion-Clipperton Zone, central Pacific Ocean (purple box), spanning 6 milllion km2. Knowledge of marine biodiversity in the area is crucial for its protection. Image source: A. Glover at al. (2016).
The rich biodiversity of the deep sea has also been documented in big-scale taxonomic inventories and checklists in the Biodiversity Data Journal.
The echinoderm Amphioplus cf. daleus Lyman, 1879. Image source: A. Glover at al.Hymenopenaeus cf. nereus observed in the UK-1 exploration contract area. Image source: Amon et al. (2017).
Going forward, the expansion of Marine Protected Areas should also ensure the implementation of policies for the methods of resource extraction and their equitable sharing and use among the world’s nations.
Over the next few years, we hope to see an ever increasing interest in biodiversity conservation - from the general public, stakeholders and policy makers, and, of course, research institutions.
We need to love what we protect in order to be able to protect it.
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The Southern Flying Squirrel (Glaucomys volans) was spotted in an area where forestry and silvicultural activities are carried out for the sustainable exploitation of pine logging and timber.
The presence of The Southern Flying Squirrel (Glaucomys volans) was documented in Honduras for the first time after 43 years. The record is from a site of the forest management plan called “Las Lechuzas”, municipality of Concordia, department of Olancho.
Apart from this newly confirmed location, the species has also been recorded in Zambrano, department of Francisco Morazán in 1935, in Gracias, department of Lempira, and finally in the Department of paradise in 1979. Based on these records, Honduras is considered the southernmost distribution known for this species.
G.volans before it started to glide to the oaks. Photograph by MATC.
The discovery was possible thanks to a project of El Aserradero Sansone, a company focused on sustainable forestry activities in Honduras, and is published in a research article in the peer-reviewed journal Check List.
This finding confirmed that there is at least one population of G. volans in the country, at the Las Lechuzas site, which is currently also the southernmost locality known in its global distribution.
The species has been assessed as Least Concern by the IUCN (meaning it has stable populations), but is considered Data Deficient on the Red List of Honduran species. Considering the low number of records and the high rate of destruction of pine forests in Honduras, G. volans is a priority for conservation in the country.
Part of the team that helped to encounter the squirrel. Photograph by MATC.
In support of the conservation of the biodiversity of Las Lechuzas, the company Sansone is now committed to giving priority to the conservation of G. volans in the area. The use of artificial shelters for G. volans is also being studied, as the animal is at greater risk when its nests are disturbed.
Based on recommendations suggested in the study, Sansone will work to increase the quantity and quality of tree seedlings that will grow in the canopy and educate people in the community about the need to protect pine ecosystems and rare animals. Additionally, within the 3,139.62 ha of the management plan of Las Lechuzas, there are 836.63 ha that have been declared as hydrological protection zones. Currently, there is no record of G. volans in any protected area of Honduras.
“As a professional with an experience of 43 years, I capitalize on the detection of the Flying Squirrel as an event that opens the doors to the true dimension posed by the Honduran forest law in the proper administrative management. That includes biodiversity conservation and protection and rationality of the protection of natural resources. The latter turns out to be of greater importance in view of the strong social pressures in favor of the conversion of the use of forest land destined for extensive agriculture and livestock, as well as the environmental impacts caused by climate change that is being sustained by the mismanagement of our resources,”
says José Muñoz, one of the authors in the study.
About El Aserradero Sansone:
El Aserradero Sansone was founded in 1957, characterized by compliance with the laws of Honduras, especially those related to forest management. It has developed an evolutionary and progressive process of achievements in the implementation of management plans, including such related to the evaluation of environmental impacts.
In this sense, the environmental importance in the management of natural resources has continued to promote evolution, defining the need to venture into aspects related to the conservation of flora and fauna as well as the incidence of climatic and environmental factors in the administration of natural resources. Within this responsibility, the last challenge that the company Sansone is welcoming with great optimism lies in adhering to the international criteria and indicators of the forest certification process through the principles of FSC (Forest Stewardship Council) and through the GFA company of Hamburg, Germany.
Research article:
Turcios-Casco MA, Hernández GS, Mancía FE, Molinero CF, Muñoz J, López CM, Ordóñez-Garza N (2023) Unseen for 43 years! A new occurrence of Glaucomys volans (Linnaeus, 1758) (Rodentia, Sciuridae) in Honduras. Check List 19(1): 133-139. https://doi.org/10.15560/19.1.133
Spectacular subtropical montane forest scenery in Yushan National Park. Credit: Ms. Wen-Ling Tsai
Montane forests, known as biodiversity hotspots, are among the ecosystems facing threats from climate change. To comprehend potential impacts of climate change on birds in these forests, researchers set up automatic recorders in Yushan National Park, Taiwan, and developed an AI tool for species identification using bird sounds. Their goal is to analyze status and trends in animal activity through acoustic data.
Compared to traditional observation-based methods, passive acoustic monitoring using automatic recorders to capture wildlife sounds provides cost-effective, long-term, and systematic alternative for long-term biodiversity monitoring.
The authors deployed six recorders in Yushan National Park, Taiwan, a subtropical montane forest habitat with elevations ranging from 1,200 to 2,800 meters. From 2020 to 2021, they recorded nearly 30,000 hours of audio files with abundant biological information.
An automatic recorder was installed on a tree to capture the surrounding soundscape. Credit: Ph.D. Candidate Shih-Hung Wu
However, analyzing this vast dataset is challenging and requires more than human effort alone.
To tackle this challenge, the authors utilized deep learning technology to develop an AI tool called SILIC that can identify species by sound.
SILIC can quickly pinpoint the precise timing of each animal call within the audio files. After several optimizations, the tool is now capable of recognizing 169 species of wildlife native to Taiwan, including 137 bird species, as well as frogs, mammals, and reptiles.
In this study, authors used SILIC to extract 6,243,820 vocalizations from seven montane forest bird species with a high precision of 95%, creating the first open-access AI-analyzed species occurrence dataset available on the Global Biodiversity Information Facility. This is the first open-access dataset with species occurrence data extracted from sounds in soundscape recordings by artificial intelligence.
The Gray-chinned Minivet (left) displays a secondary non-breeding season peak (right) which is possibly related to flocking behavior. Credit: Shih-Hung Wu, Ph.D. Candidate
The dataset unveils detailed acoustic activity patterns of wildlife across both short and long temporal scales. For instance, in diel patterns, the authors identify a morning vocalization peak for all species. On an annual basis, most species exhibit a single breeding season peak; however, some, like the Gray-chinned Minivet, display a secondary non-breeding season peak, possibly related to flocking behavior.
As the monitoring projects continue, the acoustic data may help to understand changes and trends in animal behavior and population across years in a cost-effective and automated manner.
The sound of Gray-chinned Minivet. Credit: Ph.D. Candidate Shih-Hung Wu
The authors anticipate that this extensive wildlife vocalization dataset will not be valuable only for the National Park’s headquarters in decision-making.
“We expect our dataset will be able to help fill the data gaps of fine-scale avian temporal activity patterns in montane forests and contribute to studies concerning the impacts of climate change on montane forest ecosystems,”
they say.
Original source:
Wu S-H, Ko JC-J, Lin R-S, Tsai W-L, Chang H-W (2023) An acoustic detection dataset of birds (Aves) in montane forests using a deep learning approach. Biodiversity Data Journal 11: e97811. https://doi.org/10.3897/BDJ.11.e97811
You can also follow Biodiversity Data Journal on Twitter and Facebook.
The Cinereous Vulture (Aegypius monachus) – also known as Black Vulture, Monk Vulture or Eurasian Black Vulture – is the largest bird of prey in Europe.
Globally classified as Near Threatened, its populations in southern Europe, once abundant, have been experiencing a dramatic decline since the late 1800s. So dramatic, in fact, that by the mid-1900s, these birds had already been nowhere to be seen throughout most of their distributional range across the Old Continent. In Bulgaria, the species has been considered locally extinct since 1985.
Thanks to the re-introduction initiative that was started in 2015 by three Bulgarian non-governmental organisations: the leading and oldest environmental protection NGO in Bulgaria: Green Balkans, the Fund for Wild Flora and Fauna and the Birds of Prey Protection Society, the species is now back in the country.
By mid-2022, the team imported a total of 72 individuals from Spain and European zoos, before releasing them in strategically-chosen sites in the Eastern Balkan Mountains and the Vrachanski Balkan Nature Park in Northwestern Bulgaria.
The team brought 63 immatures from Spain, where the birds had been found in distress and rehabilitated in aviaries. The other nine juveniles were captive-bred in zoos, and then released by means of hacking, which involves an artificial nest, from where the fledglings can gradually ‘’take off” to a life in the wild.
The re-introduction campaign to date is presented in a research article, published in the open-access Biodiversity Data Journal. There, the scientists led by Ivelin Ivanov (Green Balkans), report on and discuss the effectiveness and challenges of the different release methods and offer tips on the conservation and re-introduction.
For example, hacking proved to be inefficient for establishing an entirely new core (or nucleus) population of Cinereous Vultures in the Balkan Mountains in Bulgaria. It did not work for supplementing a small settled group of individuals either.
Instead, the team recommend the aviary method and delayed release, where captive-bred birds are introduced to the new locality after a period of acclimatisation, where the birds can gain life experience to the local environment.
“The Cinereous Vulture re-introduction establishment phase in Bulgaria in the two first release sites is running according to the plan, and the first results are satisfactory,”
the scientists comment.
“Two distinct nuclei are now created, and the species started breeding, which might be a reason to up-list it in the Red Data Book of Bulgaria from ’Extinct’ to ‘Critically Endangered.’”
These two newly created breeding nuclei of the Cinereous Vulture in Bulgaria are the second and third of their kind in the Balkan Peninsula.
“Following a dramatic decline throughout the 20th century for decades, the species had remained in only one breeding colony in Dadia-Lefkimi-Soufli Forest National Park in north-eastern Greece. Now, exchange between the three colonies will facilitate the exchange of individuals, ensure long-term stability, and give rise to the regional population,”
the authors of the study say.
However, the team points out that further monitoring and modelling and adaptive management are indispensable for the long-term persistence of the new national population. Now that there is already evidence that the imported vultures have been successfully breeding in Bulgaria, there is one step left before it can be officially confirmed that the Cinereous Vulture species has successfully re-established in the country. This conclusion can only be made after the core breeding populations begin to produce about ten chicks every year and after the locally fledged individuals begin to reproduce on their own. Such results are expected by 2030.
The re-introduction of the Cinereous Vulture is the latest in a series of conservation projects focused on birds of prey in Bulgaria.
First, in a programme that started in 2009, the Griffon Vulture was successfully re-introduced in Bulgaria after about 50 years of “extinction”. In fact, the team took a lot of the know-how and methods used in that project to apply in the present project. The success story was published in a research paper in the Biodiversity Data Journal in 2021.
In fact, the very same day in 2021 saw two publications in the Biodiversity Data Journal that reported on re-introduction successes involving birds of prey in Bulgaria, which had gone missing for decades. The second instance was the discovery of the first nesting Saker Falcons in twenty years
Both scientific publications are part of a dynamic ‘living’ collection, titled “Restoration of species of conservation importance”, whose aim is to collate publicly available research studies reporting on the reintroduction and/or restocking of animal and plant species of conservation importance around the world. The collection was inspired by the “International Scientific Conference on Restoration of Conservation-Reliant Species and Habitats” held in Sofia, Bulgaria, in 2020.
“The restoration of species is one of the most important conservation tools in the context of constantly intensified human-driven global biodiversity loss. The reintroduction/restocking activities are related to significant research and data gathering before and during the work process, which ensures their sustainable success,”
explain the collection editors.
Research article:
Ivanov I, Stoynov E, Stoyanov G, Kmetova–Biro E, Andevski J, Peshev H, Marin S, Terraube J, Bonchev L, Stoev IP, Tavares J, Loercher F, Huyghe M, Nikolova Z, Vangelova N, Stanchev S, Mitrevichin E, Tilova E, Grozdanov A (2023) First results from the releases of Cinereous Vultures (Aegypius monachus) aiming at re-introducing the species in Bulgaria – the start of the establishment phase 2018–2022. Biodiversity Data Journal 11: e100521. https://doi.org/10.3897/BDJ.11.e100521
You can also follow Biodiversity Data Journal on Twitter and Facebook.
Ambitious goals have been set by the European Union, in order to tackle the biodiversity conservation challenges over the coming decade. No less ambitious are the goals of the Horizon Europe project SELINA, which is one of the current major initiatives looking in the same direction.
SELINA (Science for Evidence-based and Sustainable Decisions about Natural Capital) is a transdisciplinary project aimed at promoting the conservation of biodiversity, enhancing ecosystem conditions, and supporting the sustainable use of the environment through evidence-based decision-making.
As an experienced science communicator and open-science publisher, Pensoft will be leading the project’s communication and dissemination activities.
“Ecosystem services is one of the topics that Pensoft has been involved in for more than 10 years, so it was only natural for us to continue our work as a communicator of scientific information in the ambitious SELINA project as well,”
says Prof Pavel Stoev, COO at Pensoft.
“We have already collaborated with many of the partners within the earlier EC Horizon 2020 project ESMERALDA, which concluded with the launch of a pan-European network of scientific institutions engaged with biodiversity conservation and ecosystem services.
In addition, Pensoft has been strongly connected to the community through the scholarly journal One Ecosystem, which is supported by Ecosystem Services Partnership, and offers an opportunity for scientists in the field to publish their results in a new and innovative way.”
he adds.
The project
SELINA was launched in July 2022 and will run for 5 years. Having received EUR 13 million in funding, the project is seen as an unprecedented opportunity for smart, cost-effective, and nature-based solutions to historic societal challenges such as climate change, biodiversity loss, and food security.
One of the project’s main objectives is to identify biodiversity, ecosystem condition, and ecosystem service factors that can be successfully integrated into decision-making processes in both the public and private sectors.
To achieve this objective, SELINA will develop, test, and integrate new and existing knowledge, including methodological approaches to improve biodiversity, ecosystem condition, and ecosystem service information uptake by decision-makers.
In addition, the project will utilise EU-wide workshops and multi-disciplinary Communities of Practice involving a wide range of stakeholders, including scientists, policymakers, business leaders, and civil society organisations.
The project will also organise Demonstration Projects on biodiversity, ecosystem condition, and ecosystem service integration in decision-making and co-create a Compendium of Guidance that will allow stakeholders to make full use of the project’s results and fit-for-purpose recommendations with real-world applications in policy-making and business decisions.
International consortium
SELINA project brings together experts from 50 partnering organisations across all European Union member states, Norway, Switzerland, Israel, and the United Kingdom.
The project comprises a Pan-European and transdisciplinary network of professionals from the academic and non-academic sectors with various (inter)disciplinary backgrounds – including ecologists, economists, social scientists – who have agreed to work collaboratively to support transformative change based on evidence-based decision-making related to the management of natural resources.
Find out more about the project on the SELINA website: project-selina.eu/.
Between 2010 and 2019, total imports of frog’s legs into the EU numbered 40.7 million kg, which equals to up to roughly 2 billion frogs. While Belgium is the main importer, France is the main consumer. These insights are part of a new study, published in the journal Nature Conservation, which found “inexplicable volatility” in the trade of frog legs and an extreme dependency of the EU on other countries to meet its demand.
Leading author Dr. Auliya of the Leibniz Institute for the Analysis of Biodiversity Change in Bonn, Germany, outlines the manifold uncertainties underlying this trade: “The international trade in frogs’ legs is a black box, whether it is the lack of species-specific trade data, which would be needed to ensure sustainability, or the large-scale mislabeling in trade and the challenges to identify species when it comes to processed, skinned and frozen frogs’ legs.”
Frogs’ legs from large ranids at a large-scale reptile collector in North Sumatra, Indonesia. Photo by Mark Auliya
Frogs have a central role in the ecosystem as insect predators – and where frogs disappear, the use of toxic pesticides increases. Hence, the frogs’ legs trade has direct consequences not only for the frogs themselves, but for biodiversity and ecosystem health as a whole. The extent to which pesticide residues in frogs’ legs are traded internationally remains unclear.
In the 1970s and 1980s, India and Bangladesh were the top suppliers of frogs’ legs to Europe, but when their wild frog populations collapsed, both countries banned exports. Since then, Indonesia has taken over as the largest supplier. In the Southeast Asian country, as now also in Turkey and Albania, large-legged frog species are dwindling in the wild, one after the other, causing a fatal domino effect for species conservation. This increasingly threatens frog populations in the supplier countries.
“The EU is by far the world’s largest importer of frogs’ legs, and large-legged species such as the crab-eating grass frog (Fejervarya cancrivora), the giant Javan frog (Limnonectes macrodon) and the East Asian bullfrog (Hoplobatrachus rugulosus) are in particular demand among supposed gourmets in Europe”, points out co-author Dr. Sandra Altherr, a biologist and wildlife trade expert of the Germany-based charity Pro Wildlife.
Frozen frogs’ legs on sale in a French supermarket, August 2022. Photo by Sandra Altherr / Pro Wildlife
While commercial frog farms, like those operated in Viet Nam, may at first glance seem to be an alternative that can relieve the pressure from wild frog populations, ongoing restocking of frog farms with native species from the wild and, in the case of non-native species, such as the American bullfrog (Lithobates catesbeianus) the risk of escape, invasion and potential risk of disease spread, are serious risks for the environment.
The harvest of wild frog populations and species produced at commercial frog farms for the purpose of consumption also leaves disease control and hygiene measures by the wayside; additionally, the cross-border trade of species for consumption has led to genetic pollution and hybridization between species.
Limnonectes blythii species complex from a large-scale collector in North Sumatra. Photo by Mark Auliya
„During the course of this study, it became clear just how difficult it is to obtain concrete data on the current international trade in frogs’ legs. Specifically, relevant data are scattered across different unconnected databases,“ the researchers write in their paper.
In the course of their review, they were not able to find any published data out whether pesticide residues and other potentially toxic substances in (processed) frogs or their legs imported into the EU have been monitored. “This in itself is shocking and in view of the situation in exporting countries and the lack of transparency and management in the application of agrochemicals and veterinary medicinal substances within commercial farms, we strongly recommend that this monitoring become an urgent near-future task for importing countries,” they write.
“The complexity of issues underlying the frogs’ legs trade is not a priority policy item for the EU,” the authors conclude. They add that a listing of the most-affected frog species under CITES, the Convention on International Trade in Endangered Species of Wild Fauna and Flora, would help to monitor trade and ensure its sustainability, and the EU as the main destination should take the lead on that.
Research article:
Auliya M, Altherr S, Nithart C, Hughes A, Bickford D (2023) Numerous uncertainties in the multifaceted global trade in frogs’ legs with the EU as the major consumer. Nature Conservation 51: 71-135. https://doi.org/10.3897/natureconservation.51.93868
A number of serious management and compliance issues were revealed on lion farms in the Free State province, South Africa, by a joint team of researchers from MONITOR, Blood Lions, and World Animal Protection. Potentially fraudulent activities relating to the use of microchips, operating without valid permits, and incomplete, inconsistent, and unclear record keeping were some of the irregularities found on commercial facilities that keep and trade captive lions and other predators.
Lions on a commercial lion farm in South Africa. Photo by Blood Lions
African lions are legally farmed in South Africa for commercial uses in interactive tourism activities, such as cub petting, voluntourism, or the “canned” hunting industry (where captive-bred lions are released into a confined space to be killed for sport). Other reasons include trade in live animals, or selling their body parts for the needs of traditional Asian Medicine.
All lions born and kept on commercial farms in South Africa should be registered with the provincial authority and fitted with a unique identification microchip, in order for each animal to be followed from birth to death through the system and to avoid the laundering of wild-caught and/or non-registered captive-bred lions.
Lions on a commercial lion farm in South Africa. Photo by Blood Lions
A multinational team of researchers used permit data legally obtained from provincial authorities to summarise such uses of lions on farms in the Free State and found multiple instances of violation of national and provincial regulations.
It is known that the Free State province is at the heart of the commercial lion industry, with about a third of all lion facilities across the country located on its territory. These farms in the Free State predominantly breed, keep and euthanise lions, as well as trade with other provinces to supply “canned” hunting farms and tourism facilities. They also prepare lion body parts for export, such as taxidermy for trophies, and skeletons for the bone trade with Southeast Asia.
Lion cubs on a commercial lion farm in South Africa. Photo by Blood Lions
Data legally obtained from the Free State Department of Small Business Development, Tourism and Environmental Affairs show hundreds of reused microchip numbers across permits for keeping, euthanising and transporting captive lions, indicating potential non-compliance with national and provincial regulations.
During a four-year period (2017-2020), more than 500 unique microchips (11% of the total microchip numbers) could not be followed through the system. For euthanasia permits, the number of potentially fraudulently used microchip numbers of lions was as many as 15%, and in some cases a microchip number had been reused up to four times.
This raises serious concerns that lion farm owners may deliberately be reusing microchip numbers to launder wild-caught and/or unregistered captive-bred lions.
A lion. Photo by Matthias Appel under a CC0 1.0 license
“Although some of these inconsistencies may have legitimate explanations, the number of times microchip numbers were reused is worrisome and requires further investigation by the authorities”, states Dr Sarah Heinrich of MONITOR, one of the researchers behind the study, which was published in the journal Nature Conservation.
The laundering of lions and/or other predators through the fraudulent use of microchips has implications beyond South Africa’s borders, in particular, in the trade in lion bones for traditional medicine, where bones, claws, skeletons, and skulls are exported to Southeast Asia. “Looking at live lion exports through the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), it is unclear what happens to these animals once they arrive at their international destinations. It is possible that some of these live exports circumvent the zero CITES lion bone export quota and are eventually euthanised at their import destinations to feed the persisting demand for lion bones”, said Dr Jennah Green of World Animal Protection.
CITES is the main regulatory mechanism governing the commercial international trade in certain wildlife species, including lions, their body parts, and derivatives. Under CITES, (African) lions are listed in Appendix II. A screenshot from Speciesplus.net, taken 31 January 2023.
Lions that were euthanised in the Free State in 2019 and 2020, during a CITES zero export quota for lion bones, most likely became part of a growing and largely unregulated stockpile of lion bones that exists in South Africa, which warrants further investigation.
Ensuring regulatory compliance in all areas of the commercial captive lion industry is more important now than ever. In 2021, Minister Barbara Creecy of the Department of Forestry, Fisheries and the Environment (DEFE), stated that the South African government intends to effectively end the commercial captive lion industry through a mandatory phase-out, which eventually was changed to a voluntary scheme.
In its current state, the lion farming industry is governed by a patchwork of contrasting legislation across multiple provincial and national authorities, with disparities and legal loopholes, which create opportunity for harmful and fraudulent activity.
“Our research highlights many areas of grave concern and these issues need the urgent attention of the Minister and the DFFE, as well as the nine provincial nature conservation authorities, to put stricter enforcement of the TOPS Regulations in place”, concludes Dr Louise de Waal, Director of Blood Lions.
Original source:
Heinrich S, Gomez L, Green J, de Waal L, Jakins C, D’Cruze N (2022) The extent and nature of the commercial captive lion industry in the Free State province, South Africa. Nature Conservation 50: 203-225. https://doi.org/10.3897/natureconservation.50.85292
Choloepus hoffmanni capitalis is a poorly known subspecies of two-toed sloth that inhabits coastal southern Colombia and Ecuador(Hayssen 2011). In Ecuador, according to local reports from rehabilitation centers and events recorded by the press, this species is apparently not widely trafficked for pet trade, but it is known to be illegally hunted and consumed, the impact of which is difficult to trace and evaluate. Nevertheless, the conservation status of the two-toed sloths C.h. capitalis Ecuadorian coast keeps leaning towards more threatened categorizations, and nowadays is established as vulnerable (Tirira, 2021).
The sloths Bravo and Linda during rehabilitation.
Its habitat is a hotspot for conservation in all its extent, as it is threatened. In addition, due to multiple origins of impact, it has been recorded as the second most abundant mammal (from the list of animals subjected to wildlife traffic and bushmeat consumption according to Environment Ministry reports) received in the busy rehabilitation center of Guayaquil, Ecuador (Villalba-Briones et al., 2021).
Xenarthrans have been relatively poorly studied, specially sloths (Superina and Loughry 2015), and due to the species’ inconspicuous strategy, it is also difficult to detect and perform population evaluations (Martínez et al. 2020). Taking in account the slow reproduction rate of Choloepus gen., having one offspring every 3 years (Hayssen 2011), it is critical to consider the importance of reintroductions (Paterson et al. 2021, Villalba-Briones et al. 2022), but, to all effects, nothing can substitute the implementation of efficient regulation to cease hunting and bushmeat consumption.
In-situ studies, understanding its ecology, behavior, abundance etc., could provide the necessary tools to estimate its populations, and evaluate its conservation status. Alternatively, non-invasive opportunistic studies in ex-situ programs during rehabilitation procedures could provide improvements in the aspects as diets and health, increasing the survival rate and fitness to release of rehabilitated sloths.
Bravo, the two-toed sloth moving through the trees on the day of release with a biodegradable backpack that supported the Bluetooth detection device (Day 1). Photo by R. Villalba-Briones
We suggest considering follow-up activities to check the animals’ safety during their adaptation to the natural environment. We also propose the inclusion of a follow-up term to redeem the post-release supportive monitoring, develop its scope, and to rely on the presence and readiness of the caregivers or researchers to help the animal during the first weeks after release.
In order to track Bravo after his release, a handmade biodegradable backpack with Bluetooth signal transmission capacity was fitted to his body. The lightweight Tile Bluetooth device did not pose any harm to the sloth, and after some heavy rains cardboard-made attachment just disintegrated, releasing the device.
Motionless defensive behavior of Bravo, the two-toed sloth, under threat from an owl (Night 6). Photo by R. Villalba-Briones
In our work, the presence in the area of a territorial carnivore individual led to the end of the follow-up activity. Consequently, in the case of probable undesired situations, we propose the use of devices to track the animals and monitor their presence daily. Alternatively, accounting for the relationship between movement patterns of the individual and detection probability, we propose 7 pm as the best time for observations of this mainly nocturnal species.
Due to the difficulty monitoring nocturnal animals, economic constraints in conservation, accessibility, and safety of the animals, biodegradable Bluetooth-based backpacks are recommended to ease the location of the animal and support its survival in the wild. The range of detectability of the device used indicates its suitability for tracking low-mobility animals.
Map showing the movements and tree use of the rehabilitated two-toed sloth (Choloepus hoffmanni) in a dry tropical forest in the coastal region of Ecuador.
This first record of the follow-up of a rehabilitated Choloepushoffmanni and the detectability analysis offer valuable information for the future release and follow-up of individuals belonging to the genus Choloepus, and sloths in general.
The knowledge about released animals’ survival could help in clearing rehabilitation uncertainties, and, always, can give the animals the second chance they deserve. Monitoring animal survival after release is essential for recording whether the rehabilitation process has been accomplished, but it is rarely done in practice, given the amount of funds required. It can, however, be substantially cheaper and affordable if the right techniques are used. These activities are more feasible when strategic planning and support exist.
Nowadays, the scarcity of funds to fulfill the needs of conservation projects on sloths (Superina and Loughry 2015, Choperena-Palencia and Mancera-Rodríguez 2018) seems to be an important obstacle. However, with a sensitized population, management effort, and support, it could be possible to understand and preserve the Choloepus hoffmanni capitalis.
References:
Choperena-Palencia MC, Mancera-Rodríguez NJ (2018) EVALUACIÓN DE PROCESOS DE SEGUIMIENTO Y MONITOREO POST-LIBERACIÓN DE FAUNA SILVESTRE REHABILITADA EN COLOMBIA. Luna Azul: 181–209. https://doi.org/10.17151/luaz.2018.46.11
Hayssen V (2011) Choloepus hoffmanni (Pilosa: Megalonychidae). Mammalian Species 43: 37–55. https://doi.org/10.1644/873.1
Martínez M, Velásquez A, Pacheco-Amador S, Cabrera N, Acosta I, Tursios-Casco M (2020) El perezoso de dos dedos (Choloepus hoffmanni) en Honduras: distribución, historia natural y conservación. Notas sobre Mamíferos Sudamericanos 01: 001–009. https://doi.org/10.31687/saremNMS.20.0.25
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Researchers found that the number of hippopotamus in the Bui National Park declined by about 70% after the construction of a hydroelectric dam in the reserve.
The Bui National Park is one of the few areas where the common hippopotamus resides in Ghana. The combined resources of the Black Volta River and the abundance of grasses make the area very suitable for hippopotamus. However, in an attempt to solve the electricity crisis the country faced in 2007, the government of Ghana constructed a hydroelectric dam in the heart of their home.
Farmers clearing trees along the rivers to begin cultivation at Bui National Park.
Knowing the consequence of dam creation on aquatic species, scientists Godfred Bempah, Martin Kobby Grant, Changhu Lu, and Amaël Borzée from Nanjing Forestry University, China, wanted to understand how the hippopotamus, a mega semi-aquatic species, was impacted by this project. The results have been published in the journal Nature Conservation. Assessing the impact of the dam construction can advise policy and decision making in future projects like this.
The researchers spent 24 days (2 days per month for 12 months) at the Bui National Park to estimate the number of hippopotamus individuals and understand local migratory activities, as well as to assess changes in land cover in the area after the dam was constructed. They then compared this information with historical data to understand the ecological changes within the area.
A hippopotamus in the Zoologico de Vallarta at Mismaloya south of Puerto Vallarta, Mexico. Photo by David Stanley under a CC BY 2.0 license
To complement the field surveys, the researchers spoke to local people familiar with the reserve before and after the dam construction. These included fishermen, canoe operators and park rangers. During the interactive discussion, all of them stated that the numbers of hippopotamus have declined compared to periods before the dam construction. They attributed the decline to poaching and habitat destruction.
The results indicated a decline in hippo numbers of about 70%: from 209 individuals in 2003 to 64 individuals in 2021.
A seized skull of Hippopotamus amphibius at the Bui national Park.
The study revealed noticeable changes in land cover after the dam construction, and, most importantly, a decline in forest cover, as well as destruction of riparian grasses, the habitat preferred by the hippopotamus. The increase in water levels flooded the areas where the animals used to reside, forcing them to disperse to other suitable areas. As they dispersed, the animals became vulnerable to poaching, which combined with habitat loss eventually led to a decline in hippopotamus numbers. It is possible that some of the animals might have successfully moved to other areas outside the reserve.
In conclusion, the authors note that the number of common hippopotamus individuals in the park has declined following the dam construction, in connection with habitat destruction and poaching. Once these threats are removed, the hippopotamus can survive in the medium to long term, when effective management plans are implemented.
Research article:
Bempah G, Kobby Grant M, Lu C, Borzée A (2022) The direct and indirect effects of damming on the Hippopotamus amphibius population abundance and distribution at Bui National Park, Ghana. Nature Conservation 50: 175-201. https://doi.org/10.3897/natureconservation.50.87411
With more than 7000 individuals populating the Carpathian Mountains and neighboring areas, Romania has the highest density of brown bears in Europe. As they often inhabit human-dominated landscapes, conflicts with people are not uncommon.
“The media play an influential role in how the public perceives brown bears, thus, it can promote human-wildlife coexistence or exacerbate future conflicts”, they say.
Brown bear waiting on the roadside for food scraps (National Road 2D, Vrancea, Romania). Photo by Dr Silviu Chiriac (EPA Vrancea)
The study found that news stories related to brown bears became common in Romanian media only after 2016, following the instatement of a provisional one-year ban on culling, and increased abruptly in 2021 following the whistleblowing of an alleged trophy hunting event.
The majority of reports were about human-bear interaction, hunting, and poaching, offering little context and information on how to avoid conflicts. Articles on the ecology and biology of brown bears were rare, which indicates less consideration of the ecological significance and the impact of human activities on their conservation status.
Focusing on alarming messages without offering evidence or advice can increase fear and undermine efforts to protect the species and the welfare of society.
The attitude towards brown bears, perceived from the studied articles was predominantly negative (53%; 380 articles). In these articles, the authors used phrases such as: “At any moment the people can find themselves in front of a hungry bear;” “Beyond the horror they live with every day, they have lost their patience and trust in the authorities;” and “People are afraid of the worst.”
Even when reporting sightings of bears near populated areas and encounters with no casualties, Romanian media promoted a negative image of bears to their readership. “Focusing on alarming messages without offering evidence or advice can increase fear and undermine efforts to protect the species and the welfare of society,” the researchers said.
Importantly, the team found that media did not consult wildlife and conservation biologists when reporting on human-bear interactions or bear hunting and poaching events. “This can be because the experts are reluctant to be part of the debate, or because the media may not be interested in bringing more scientific context to their reports,” they reason.
Rescuing a bear trapped in wire-snare in an orchard (Vrancea, Romania). Photo by Dr Silviu Chiriac (EPA Vrancea)
“In conclusion, increasing the frequency of reporting interaction events with alarming messages can only lower the level of tolerance for wildlife and negatively influence political decisions regarding the management of the brown bear population.”
The researchers call for publishing detailed and evidence-informed news as a means to educate people to avoid conflict and facilitate the implementation of effective wildlife conservation and management strategies.
“Evidence-informed news can help authorities better understand conflicts and create bottom-up pathways toward an optimistic future for brown bears and Romanian society”, they conclude.
Research article:
Neagu AC, Manolache S, Rozylowicz L (2022) The drums of war are beating louder: Media coverage of brown bears in Romania. Nature Conservation 50: 65-84. https://doi.org/10.3897/natureconservation.50.86019
