Publications

Sleep is a universal behavior in vertebrate and invertebrate animals, suggesting it originated in the very first life forms. Given the vital function of sleep, sleeping patterns and sleep architecture follow dynamic and adaptive processes reflecting trade-offs to different selective pressures. Here, we review responses in sleep and sleep-related behavior to environmental constraints across primate species, focusing on the role of great ape nest ...

Objectives – We investigated occurrences and patterns of terrestrial nocturnal activity in wild chimpanzees (Pan troglodytes) and modelled the influence of various ecological predictors on nocturnal activity.
Methods – Data were extracted from terrestrial camera-trap footage and ecological surveys from 22 chimpanzee study sites participating in the Pan African Programme: The Cultured Chimpanzee. We described videos demonstrating nocturnal ...

Four species of Mammomonogamus are known from large African herbivores. A recent study demonstrated that a single Mammomonogamus species was shared by both western lowland gorillas (Gorilla gorilla gorilla) and African forest elephants (Loxodonta cyclotis) in Central African Republic, suggesting lower species diversity than previously described in literature. We examined more than 500 fecal samples collected from sympatric African forest ...

Current levels of bushmeat hunting in west and central Africa are largely unsustainable, and will lead to the loss of an important natural resource and cause the extinction of threatened species. Worryingly, great apes are hunted for their meat despite being protected across their range. In this paper, we highlight the main actors involved in the trafficking of great ape meat around the Dja Biosphere Reserve (DBR) in Cameroon, and describe the ...

Protected areas have become a vital conservation strategy to protect wildlife; however, illegal activities performed by local people within and around protected areas may undermine their conservation goals. We used information from 169 direct interviews with rural residents in order to understand the factors affecting illegal behaviors related to hunting and deforestation in three protected areas and a buffer zone of the Southern Bahian Atlantic ...

Behavioural studies on animals incorporate data on morphology, physiology and energetic status, as well as kinship and genetic information. Such measures have become the state of the art when assessing the function of a given behaviour. Zoos provide opportunities for research of a kind that is difficult to undertake in the wild. In this article several advantages of studying captive animals are highlighted; for example, accessibility, ease of ...