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Open AccessMany morphs: Parsing gesture signals from the noise
Parsing signals from noise is a general problem for signallers and recipients, and for researchers studying communicative systems. Substantial efforts have been invested in comparing how other species encode i...
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Sexual Behaviors and Hormonal Background of Female Bonobos
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Open AccessCorrection to: Physical, behavioral, and hormonal changes in the resumption of sexual receptivity during postpartum infertility in female bonobos at Wamba
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Open AccessPhysical, behavioral, and hormonal changes in the resumption of sexual receptivity during postpartum infertility in female bonobos at Wamba
The operational sex ratio (OSR) is used as a predictor for the intensity of mating competition. While many factors affect the OSR, there tends to be a high male bias in primate species with long interbirth int...
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Prevalence of antibodies against human respiratory viruses potentially involving anthropozoonoses in wild bonobos
One of the current threats to the bonobo (Pan paniscus), a highly endangered ape species only found in the Democratic Republic of the Congo, are anthropozoonoses caused by human respiratory viruses. To date, epid...
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The diet and feeding behavior of the black-and-white colobus (Colobus guereza) in the Kalinzu Forest, Uganda
One of the goals for primate feeding ecology is to understand the factors that affect inter- and intra-specific variations. Therefore, a detailed description of basic feeding ecology in as many populations as ...
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Intergroup Encounters of Chimpanzees (Pan troglodytes) from the Female Perspective
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Open AccessComparisons of between-group differentiation in male kinship between bonobos and chimpanzees
Patterns of kinship among individuals in different groups have been rarely examined in animals. Two closest living relatives of humans, bonobos and chimpanzees share many characteristics of social systems incl...
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Open AccessNo impact of strongylid infections on the detection of Plasmodium spp. in faeces of western lowland gorillas and eastern chimpanzees
Although a high genetic diversity of Plasmodium spp. circulating in great apes has been revealed recently due to non-invasive methods enabling detection in faecal samples, little is known about the actual mechani...
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Open AccessA comparative molecular survey of malaria prevalence among Eastern chimpanzee populations in Issa Valley (Tanzania) and Kalinzu (Uganda)
Habitat types can affect vector and pathogen distribution and transmission dynamics. The prevalence and genetic diversity of Plasmodium spp. in two eastern chimpanzee populations—Kalinzu Forest Reserve, Uganda an...
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First records of tool-set use for ant-dip** by Eastern chimpanzees (Pan troglodytes schweinfurthii) in the Kalinzu Forest Reserve, Uganda
Chimpanzees at numerous study sites are known to prey on army ants by using a single wand to dip into the ant nest or column. However, in Goualougo (Republic of Congo) in Central Africa, chimpanzees use a diff...
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Open AccessCultural differences in ant-dip** tool length between neighbouring chimpanzee communities at Kalinzu, Uganda
Cultural variation has been identified in a growing number of animal species ranging from primates to cetaceans. The principal method used to establish the presence of culture in wild populations is the method...
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Open AccessChimpanzees and bonobos differ in intrinsic motivation for tool use
Tool use in nonhuman apes can help identify the conditions that drove the extraordinary expansion of hominin technology. Chimpanzees and bonobos are our closest living relatives. Whereas chimpanzees are renown...
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Sex Differences in Ranging and Association Patterns in Chimpanzees in Comparison with Bonobos
In this chapter, we examined the ranging and association patterns of chimpanzees and bonobos at a variety of sites, including new data from chimpanzees of the Kalinzu Forest and bonobos at Wamba. We found that...
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Lethal aggression in Pan is better explained by adaptive strategies than human impacts
A meta-analysis of studies on chimpanzees and bonobos across Africa shows that their conspecific aggression is the normal and expected product of adaptive strategies to obtain resources or mates and has no con...
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Faecal particle size in free-ranging primates supports a ‘rumination’ strategy in the proboscis monkey (Nasalis larvatus)
In mammalian herbivores, faecal particle size indicates chewing efficiency. Proboscis monkeys (Nasalis larvatus) are foregut fermenters in which regurgitation and remastication (i.e. rumination) was observed in ...
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Non-conceptive Sexual Interactions in Monkeys, Apes, and Dolphins
Primates and dolphins exhibit comparable examples of all categories of non-conceptive sexual behaviors, including sexual interactions involving immature individuals, those involving individuals of the same sex...
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Human proximity and habitat fragmentation are key drivers of the rangewide bonobo distribution
Habitat loss and hunting threaten bonobos (Pan paniscus), Endangered (IUCN) great apes endemic to lowland rainforests of the Democratic Republic of Congo. Conservation planning requires a current, data-driven, ra...
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Long-Term Studies on Wild Bonobos at Wamba, Luo Scientific Reserve, D. R. Congo: Towards the Understanding of Female Life History in a Male-Philopatric Species
Long-term studies on wild bonobos began at Wamba, in the current Luo Scientific Reserve, in 1973. Except for several interruptions due to political instability and civil war, we have been conducting studies of...
