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Chimpanzees surviving in a fragmented high-altitude forest landscape of the Congolese Albertine Rift Koninklijke Maatschappij voor Dierkunde van Antwerpen Universiteit Antwerpen

Anne Laudisoit, Pierre Huyghe, Jacob Willie, Bienvenu Ndjoku, Tiffany Scholier, Jérôme Dz'na, Nikki Tagg, Samantha Maher, Claude Mande, Tara Hoda, et al.
Abstract This paper documents a community of eastern chimpanzees (Pan troglodytes schweinfurthii Giglioli, 1872) inhabiting three relict forest fragments situated on the Lake Albert escarpment, down the Ituri highlands, of eastern Democratic Republic of the Congo (DRC). The area explored had a combined forested surface of ±18.15 km2 in 2017, shrinking by 1.2% per year between 2010 and 2015. Between 2015 and 2017, we found 160 chimpanzee nests ...

Elephant Endotheliotropic Herpesvirus Is Omnipresent in Elephants in European Zoos and an Asian Elephant Range Country Koninklijke Maatschappij voor Dierkunde van Antwerpen

Tabitha E. Hoornweg, Willem Schaftenaar, Gilles Maurer, Petra B. van den Doel, Fieke M. Molenaar, Alexandre Chamouard-Galante, Francis Vercammen, Victor P. M. G. Rutten, Cornelis A. M. de Haan
Elephant endotheliotropic herpesviruses (EEHVs) may cause acute, often lethal, hemorrhagic disease (EEHV-HD) in young elephants. Prevalence of EEHV in different elephant populations is still largely unknown. In order to improve diagnostic tools for the detection of EEHV infections and to obtain insight into its spread among elephants, we developed novel ELISAs based on EEHV1A gB and gH/gL. Performance of the ELISAs was assessed using sera from ...

Effects of Enclosure and Environmental Enrichment on the Behaviour of Ring-Tailed Lemurs (Lemur catta) Koninklijke Maatschappij voor Dierkunde van Antwerpen

Jonas Verspeek, Arno Depoortere, Lise Plessers, Marina Salas
Environmental enrichment is widely used to improve the quality of life of animals under human care. To successfully implement enrichment programs, it is important to evaluate their effect in different enclosure types since housing conditions may change depending on external factors, such as husbandry, management, or seasonal variation. This study investigates how ring-tailed lemur (Lemur catta) behaviour changes with the availability of ...

Presence of Broad-Spectrum Beta-Lactamase-Producing Enterobacteriaceae in Zoo Mammals Koninklijke Maatschappij voor Dierkunde van Antwerpen Universiteit Gent

Chloë De Witte, Nick Vereecke, Sebastiaan Theuns, Claudia De Ruyck, Francis Vercammen, Tim Bouts, Filip Boyen, Hans Nauwynck, Freddy Haesebrouck
Broad-spectrum beta-lactamase (BSBL)-producing Enterobacteriaceae impose public health threats. With increased popularity of zoos, exotic animals are brought in close proximity of humans, making them important BSBL reservoirs. However, not much is known on the presence of BSBLs in zoos in Western Europe. Fecal carriage of BSBL-producing Enterobacteriaceae was investigated in 38 zoo mammals from two Belgian zoos. Presence of bla-genes was ...

Information transfer efficiency differs in wild chimpanzees and bonobos, but not social cognition Koninklijke Maatschappij voor Dierkunde van Antwerpen

Cedric Girard-Buttoz, Martin Surbeck, Liran Samuni, Patrick Tkaczynski, Christophe Boesch, Roman M. Wittig, Gottfried Hohmann, Catherine Crockford

Several theories have been generated to understand the socio-cognitive mechanisms underlying the unique cooperative abilities of humans. The 'interdependence hypothesis' posits first, that the cognitive dimension of human cooperation evolved in contexts when several individuals needed to act together to achieve a common goal, like when hunting large prey. Second, the more interdependent individuals are, the more likely they are to provide ...

Drawn out of the shadows: Surveying secretive forest species with camera trap distance sampling Koninklijke Maatschappij voor Dierkunde van Antwerpen

With animal species disappearing at unprecedented rates, we need an efficient monitoring method providing reliable estimates of population density and abundance, critical for the assessment of population status and trend.
We deployed 160 camera traps (CTs) systematically over 743 locations covering 17,127 km2 of evergreen lowland rainforest of Salonga National Park, block South, Democratic Republic of the Congo. We evaluated the ...