Editorial
Cats and Sars-CoV-2
The IUCN SSC Bat Specialist Group has issued a recommendation to suspend field activities to protect bats (www.iucnbsg.org). After several tigers and lions have shown symptoms of COVID-19 in New York’s Bronx Zoo (Goldstein 2020),we have been asked whether the IUCN SSC Cat Specialist Group would recommend halting field work with cats as longas the Sars-CoV-2 virus is circulating. The sensitivity of this issue is highlighted by several newspaper reports that suggested a tiger living in Pench Tiger Reserve in India may have succumbed to COVID-19 (https://www.freepressjournal.in/bhopal/madhya-pradesh-pench-forest-staff-qurantined-after-death-of-corona-positive-tiger-is-fit-now; 27.04.2020). However, it is important to point out that, to this date, infection with Sars CoV-2 has not been confirmed in this tiger and the reports may be due to a mix-up with the confirmed COVID-19 cases in the Bronx Zoo (ProMed COVID-19 update141, comment by M. Gilbert 29.04.2020; https://promedmail.org/promed-post/?id=7281768). In the following, we argue why suspending field work with felids is not justified. However, we also point out that certain precautionary measures must be implemented to prevent the transfer of viruses and other pathogens between animals and humans.
The relationship of bats with viruses differs markedly from that of cats. Some species of bats can form colonies with many thousands of individuals, they travel over large distances and are in close contact with conspecifics and even other bat species. Bats are not only numerous in species, but harbour also an amazing variety of viruses of different families, for example rabies (Rhabdoviruses), Sars, Mers, Sars-CoV-2 (Coronaviruses), Hendra (Paramyxoviruses), Ebola(Filoviruses). The catalogue is continuously expanding (Woo & Lau 2019).
In comparison, both wild and domestic cats have a rather narrow spectrum of viruses, obviously reflecting their very different life history, land tenure and social system compared to bats. Epidemics caused by viruses in cats are relatively rare – canine distemper in big cats is an example – and is often the result of repeated transmission of the pathogen from other species.
Humans offer much better opportunities for viruses. High numbers and population density, mobility and long-distance travel facilitate pandemics. In this sense, they are similar to bats, with an important difference: bats have co-evolved with a wide spectrum of viruses over a long time period. This resulted in a mutual adaptation and co-existence. In contrast,the consequences of a first encounter of viruses of bats in humans are unpredictable. As seen with Sars-CoV-2, apandemic spread in the new hosts is possible, to this date with millions infected, complex clinical signs and the loss ofwell over 200,000 lives. Animals other than humans with Covid-2 became a focus of interest because they were infectedby humans. The host range of Sars-Cov-2 is only incompletely known, but may be quite wide, as suggested by analysisof its host cell receptor specificity (Damas et al. 2020).
Cats can be infected with Sars-CoV-2. In an experiment Shi et al. (2020) infected domestic cats with Sars-CoV-2. From these, virus was transmitted to other cats held in adjacent cages. However, it is important to point out that the catto-cat virus transmission happened under laboratory conditions and does not prove that Sars-CoV-2 is transmitted between cats under normal conditions. A similar question mark applies to a second report (Zhang et al. 2020) who showed that 14.7% of cats from Wuhan had antibodies to Sars-CoV-2. The presence of these antibodies indicates that the immune system of these cats had reacted to Sars-CoV-2, i.e. the cats had been infected. The cats with the highest antibody titer (the strongest antibody response) had belonged to owners who had themselves been infected with Sars-CoV-2, indicating that the direction of infection was from humans to cats. Do antibodies in the cats with unknown owners indicate that the virus has established a new chain of infection, independent of humans? No – some humans tend to “discard” their cats, especially when times are difficult, and the origin of all cats that had antibodies to Sars-CoV-2 could not be determined in the study. Parry (2020) provides a good discussion on the significance of pets for the spread of COVID-19.
But we are also – or even mainly – worried about spreading the virus from humans to cats. The lions and tigers tested positive for Sars-CoV-2 in the Bronx Zoo are believed to have been infected by a Zoo employee (Goldstein 2020). While we believe that it is unlikely that Sars-CoV-2 will naturally spread in a wild cat population, we still strongly recommend that all precautions are taken to prevent the infection of animals or humans while handling wild cats. During field work, the opportunities for viral transmission are basically restricted to the situation when cats are captured and handled e.g. for veterinary examination or radio-collaring. In such situations, researchers and cats are in close contact,and we recommend that each person involved should wear a protection mask and laboratory gloves (Fig. 1). General rules of hygiene (hand disinfection, change of protective clothing etc.) before and after such work should be observed. These precautionary measures are justified not only to protect the cats and humans, but are equally necessary to minimize the risks of virus transmission between people having to work close together in such situations. It goes without saying that only the absolute minimum of persons needed to handle the animal should be present and the social distance has to be respected whenever possible.
Much research is being invested in understanding the virology, immunology, epidemiology and possible therapies of and vaccines against COVID-19. While all these efforts are well justified, the COVID-19 pandemic highlights a problem that has already been at the roots of many, if not all, previous epidemics and pandemics caused by viruses (e.g. Sars, Ebola): the conditions that facilitated the transfer of viruses from animals to humans were much less in the focus of research and public interest than the cures, once the viruses became established in the human population. Among the causes of viral transfer from wild animals to humans, habitat destruction due to human overpopulation and the wide-spread hunting, catching, breeding, selling, killing and eating wildlife, including bats, primates and other wild animals are like a “recipe for disaster”. More than in previous pandemics, wildlife offered on wet markets in Asia and bushmeat trade in Africa are becoming issues of public concern. As a hopeful sign, the World Organisation for Animal Health (OIE) called for international regulations to protect wildlife (https://www.wildlifedisease.org/wda/Portals/0/Covid-19%20Information/OIEWildlifeTradeStatement_April2020.pdf). Mitigating wildlife trade and consumption is a delicate issue, and actions taken need to be carefully considered, as pointed out by more than 300 conservation and development organisations and specialists in an open letter to the World Health Organisation and United Nations Environment Programme (http://resourceafrica.net/?fbclid=IwAR0Onsg-lkRT6puA_UQV5mn31bHwetfABKJOVhSwTww-MYTMEkMIl4piYYjo; 01.05.2020). The pandemic demonstrates how complex the relationship between environmental,social, cultural, and economic consequences of such a crisis is, as IUCN emphasises (https://www.iucn.org/news/secretariat/202004/iucn-statement-covid-19-pandemic; 08.04.2020): “We can rebuild, but let us rebuild smarter”. COVID-19 is a stark reminder of the consequences of “opening of Pandora’s box” – we hope that this lesson is learned NOW!
Urs Breitenmoser, Christine Breitenmoser-Würsten and Ernst Peterhans
References
Damas J., Hughes G. M., Keough K.C., Painter C. A., Persky N. S., Corbo M. ... & Lewin H. A. 2020. Broad Host Range of SARS-CoV-2Predicted by Comparative and Structural Analysis of ACE2 in Vertebrates. bioRxiv: 1011.01/2020.2004.2016.045302.Goldstein J. 2020. Bronx Zoo Tiger Is Sick With the Coronavirus. The New York Times, 6 April 2020 (https://www.nytimes.com/2020/04/06/nyregion/bronx-zoo-tiger-coronavirus.html).
Woo P. C. Y. & Lau S. K. P. 2019. Viruses and bats. Viruses 11, 884.Parry N. M. A. 2020. COVID-19 and pets: When pandemic meets panic. Forensic Science International: Reports. Article in press, https://doi.org/10.1016/j.fsir.2020.100090.
Shi J., Wen Z., Zhong G., Yang H., Wang C., Huang B. … & Bu Z. 2020. Susceptibility of ferrets, cats, dogs, and other domesticated animals to SARS–coronavirus 2. Science 10.1126/science.abb7015.Zhang Q., Zhang H., Huang K., Yang Y., Hi X., Gao J. … & Jin M. 2020. SARS-CoV-2 neutralizing serum antibodies in cats: a serological investigation. bioRxiv, doi: https://doi.org/10.1101/2020.04.01.021196.
Uncover the unrevealed data: the magnitude of Javan leopard removal from the wild by D. N. Adhiasto, E. Wilianto and H. T. Wibisono
The Javan leopard Panthera pardus melas is one of three critically endangered leopard subspecies. Despite threats from severe habitat fragmentation and isolation,the magnitude of Javan leopard removal from its natural habitats might have been overlooked by the Indonesian authorities and conservation practitioners. Here we describe the magnitude of Javan leopard removals using unofficial data collated between 2007 and 2019. Over the past 13 years, an average of 4.6 leopards were removed from their natural habitats due to illegal trade and conflict incidents annually. With an estimate of some 500 wild Javan leopards remaining range-wide,this number is alarming as it may represent a minimum number of leopard removals.We, therefore, urge the management authorities to take immediate actions to strengthen the protection of Javan leopard from further loss due to both official and unofficial removals.
Record of cats from Phou Hin Poun National Protected Area, Lao PDF by P. Brakels and T. Somdachit
In this work we present the first confirmed record of the clouded leopard Neofelis nebulosa and the marbled cat Pardofelis marmorata from Phou Hin Poun National Protected Area NPA (formerly known as Khammouan Limestone National Biodiversity Conservation Area) in Khammouane province, Lao PDR. This was the first time that any camera trap survey had been conducted in Phou Hin Poun NPA.
"The Standard Four" in Virachey National Park, north-east Cambodia by G. McCann, K. Pawlowski and T. Soukhon
In a five-year wildlife camera trapping survey from January 2014 to 2020, including a one year hiatus in 2018, in Virachey National Park VNP in north-east Cambodia turned up records of the ‘standard four’ evergreen felines: mainland clouded leopard Neofelis nebulosa, marbled cat Pardofelis marmorata, Asiatic golden cat Catopuma temminckii, and leopard cat Prionailurus bengalensis. Most wild felid species– with the exception of leopard cat – are in decline throughout Indochina (Cambodia, Vietnam and Laos). The main reasons for these declines are economic development and infrastructure projects that shrink forest habitats, as well as poaching for the illegal wildlife trade from an unprecedented snaring crisis that has engulfed the region’s protected areas and other forested areas. Despite these considerable threats, VNP retains the ‘standard four’ wild cats and continued monitoring shows that these species persist in the park. The park could be an Indochinese stronghold for these four felid species.
Supporting Online Material
Observation of Amur leopards with a short tail by T. Marchenkova, E. Bildchenko, A. Vitkalova and Y. Darman
During the last 20 years, the Amur leopard Panthera pardus orientalis population has increased from 30–35 to 100 individuals. Despite this positive trend, a long-term isolation has led to inbreeding and correlates start to show up. Here we report the observation of four Amur leopards with a short tail. The spread of this defect requires urgent genetic research and remedy.
Manul downlisted to Least Concern by E. M. Moqanaki and S. Ross
The latest assessment of the Pallas’s cat or manul Otocolobus manul status for the International Union for Conservation of Nature IUCN Red List of Threatened Species™ proposed a revised categorisation of the species from Near Threatened to Least Concern. This downlisting was recommended based on better information about the geographic distribution, habitat loss and fragmentation, and population size of the manul across its global range. The recategorisation of manul indicates that, based on the best available data, the species faces a lower risk of extinction than previously thought, and is therefore welcomed. However, the proposed downlisting is a result of improved knowledge of the status of the manul, rather than any successful conservation interventions. We argue that many local populations of the manul are highly susceptible to human-induced threats, and any funding should focus on these local threat statuses.
Recent record of tiger from Sahyadri Tiger Reserve, India by S. N. Jelil, A. Gaykar, N. Girkar, V. Vyas, V. C. Ben and K. Ramesh
We report a recent record of the tiger Panthera tigris from the Sahyadri Tiger Reserve, Maharashtra, India, where the species has become functionally extinct. After a confirmed record of a tiger in 2011, this recent photographic record in 2018 confirms its first re-appearance in the reserve, encouraging the on-going recovery efforts.
Photographic evidence of tiger from Kedarnath Musk Deer Sanctuary, India by D. Pawar, P. Chanchani, A. Kanwar, C. Sylvia, S. Salaria, R. Gopal, M. Kapoor, R. Solanki, I. Bopanna, A. K. Singh, N. B. Anirudh, S. Bakshi and T. Jasrotia
We report here the highest elevation record from the Western Himalayas of India and provide photographic evidence of the occurrence of a tiger Panthera tigris in Kedarnath Musk Deer Sanctuary, Uttarakhand, India. The tiger was captured on a camera trap at an elevation of 3,431 m in May 2019.
Tigers and leopards coexist despite similarities in space use and habitat selection by A. V. Kumar, K. U. Karanth and D. Jathanna
We assessed the roles of space use and habitat selection in fostering coexistence of large felids using sympatric radio-collared tigers Panthera tigris and leopards P. pardus. We found that intraspecific spatial overlap was 2 to 17 times lower than interspecific overlap and variation in habitat preference was greater between individuals than between species. These results imply that in certain contexts tigers and leopard coexist despite interspecific similarities in space use and habitat selection.
First photographic record of clouded leopard from Kaziranga Alluvial Forest, India by R. Sharma, T. Sharma, S. K. Das, P. Chanchani, A. Sarmah, P. Bora, R. B. Saikia and P. Sivakumar
The clouded leopard Neofelis nebulosa is an elusive species primarily found in the foothills of the Himalayas and in South-east Asia. For the first time, the species was recorded from Kaziranga National Park, in Assam, India, an area dominated by alluvial grasslands and forests on the banks of the Brahmaputra River. Documenting the presence of clouded leopard in this novel habitat attests the importance of maintaining corridors, as the individuals have likely dispersed from the nearby Karbi-Anglonghill forests, an area that is at high risk to habitat degradation, over-extraction of natural resources, and hunting.
First record of rusty-spotted cat in Punjab, India by G. Kanwar and K. K. Lomis
One of the world’s small and elusive cats, a rusty-spotted cat Prionailurus rubiginosus, was spotted in the Takhni-Rehmapur Wildlife Sanctuary, Punjab, India during a pioneering exercise to document its biodiversity by using camera traps. This is the first recorded evidence of rusty-spotted cat from the state of Punjab in India. This finding will fill in the gaps among the isolated records of rusty-spotted cat in the northern parts of India.
Fishing cat mortality outside protected areas in West Bengal, India, 2019-2020 by D. Ganguly
Effective awareness programmes in the last decade have led to increased visibility of fishing cat Prionailurus viverrinus rescue and mortality reports in both print and social media platforms as compared to a decade back. Using mortality data (n=11) from The Fishing Cat Project Facebook page between January 2019 and February 2020 I identified current causes of the felid’s mortality. Death by vehicular collision was the most frequently reported cause of death followed by electrocution (due to wires deployed to kill feral pigs) and ritualistic tribal hunts. Possible conservation interventions in the landscape include deployment of speed breakers, controlling feral pig populations and continuing awareness programmes to educate locals about the fishing cat.
Lions roaming the forest-savannah mosaic, Center Region of Cameroon by I. Kristen, S. A. Kamgang, M. Ngal, A. Mveiman, P. N. Tumenta, J. P. Bissek, A. Vosper, D. Bastin, E. Ndenga and H. Bauer
This study confirms the presence of two lions Panthera leo in a forest-savannah mosaic in the Centre Region of Cameroon, more than 300 km south of their known range.
Translocations: challenges experienced with Mexican jaguars by A. I. Hoogesteijn, J. C. Faller, R. Núñez, J. L. Febles, A. Caso and C. Manterola
We present a report on seven jaguar Panthera onca translocations in Mexico. We established five conditions for a translocation to be considered as successful. We obtained records of jaguar translocations from range officer secretaries, literature,and personal communications throughout Mexico. Translocations were deemed necessary because all jaguars, except one, preyed on livestock. Jaguar follow-up after release showed these results: (i) three killed by hunters; (ii) one unknown death,probably starvation or infection; (iii) one recaptured and in captivity; (iv) two possible survivals. Translocations can represent a politically correct emergency intervention,especially when ranchers are aggravated by livestock losses due to predation or feel endangered by the presence of felines. Given the low success rate and the logistic and biological difficulties, it should be carefully considered and only executed once all prerequisites and considerations are established before release.
Short-tail jaguar: The need for transboundary collaboration across the Maya Forest
During a workshop organized by the German Technical Cooperation (GIZ, Deutsche Gesellschaft für Internationale Zusammenarbeit GmbH) through their project, Support for Monitoring of Biodiversity and Climate Change in the Maya Forest in May2018, researchers working in Belize and Guatemala realized that the same jaguar Panthera onca had been photo-captured in both countries; an adult male jaguar inapparently good body condition despite having lost its tail. Although a camera trapping survey had been performed in the region in 2004, and annual surveys began in2008, it is the first transboundary jaguar reported between these countries; highlighting the importance and potential for collaborative work between Belize and Guatemala,across the Maya Forest region.
Plasticity on interference competition - puma and ocelot: An isolated event? by K. A. Craighead and M. Yacelga
Interference competition is a fundamental ecological process that shapes community structure. We report the details of an interspecific encounter of a top predator, puma Puma concolor, and a mesopredator, ocelot Leopardus pardalis, resulting in non-antagonistic behaviour. We posit plasticity on interference competition to explain the non-aggressive interaction between the pair of Neotropical felid species.While isolated, this observation may provide insight into, perhaps, diverged behaviours of two syntopic species inhabiting a human-altered landscape.
Are we doing enough to protect the World's small wild cats? by B. Mugerwa, T. Adhya, A. Ratnayaka, A. Thudugala, C. Napolitano, J. Sanderson adn all summit participants
This report summarizes the discussion that emerged at the second international Small Wild Cat Conservation Summit held in Colombo, Sri Lanka, from 6 to 11 December 2019. Thirty one conservationists from 16 countries gathered to share and discuss the conservation status of the world’s small wild cats. They shared their research and conservation experiences, identified common threats and locally appropriate threat reduction strategies. The key threats to the small wild cat species were identified as:habitat loss and degradation, human-small wild cat conflict, hunting and poaching and vehicle collisions. However, only ten small wild cat species with known conservation initiatives were represented at the summit. A third summit planned for 2022is envisaged to have more participants and enable the representation of more small wild cat species.
Supporting Online Material