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Information transfer efficiency differs in wild chimpanzees and bonobos, but not social cognition Royal Zoological Society of Antwerp

Cedric Girard-Buttoz, Martin Surbeck, Liran Samuni, Patrick Tkaczynski, Christophe Boesch, Barbara Fruth, 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 Royal Zoological Society of Antwerp

Mattia Bessone, Hjalmar S. Kuehl, Gottfried Hohmann, Ilka Herbinger, Paul Kouame N'Goran, Papy Asanzi, Pedro B. Da Costa, Violette Derozier, Ernest D. B. Fotsing, Bernard Ikembelo Beka, et al.
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 ...