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See detailHabituation of chimpanzees at Loango National Park (Gabon)
Giraud, Gwennan ULiege; Deschner, Tobias

in Primate Tidings (2017, June), 36

Primate habituation work is an important preliminary step to field research and requires several precautions to respect (wearing masks, remaining as neutral as possible…). The chimpanzees (Pan troglodytes ... [more ▼]

Primate habituation work is an important preliminary step to field research and requires several precautions to respect (wearing masks, remaining as neutral as possible…). The chimpanzees (Pan troglodytes troglodytes) of Loango National Park (Gabon) have been the subject of a great ape habituation project conducted by the Max Plank Institute since 2005, in collaboration with the ANPN. Recently (2014) this project split in two habituation programs between gorillas and chimpanzees. The interest of this study site is truly particular given the huge variety of habitats and the very large area of the home range used by the studied population of chimpanzees. After a brief description of the species and the study site, I will present here the different types of preliminary data which are collected to evaluate the progress of the habituation work. I will also briefly describe some specific behaviors which have been identified at this study site, such as stick tool use on Binga Binga Honeybee nests. This is the beginning of very fruitful future research projects. [less ▲]

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See detailRelation between social tension and demographic density of commensal long-tailed macaques (Macaca fascicularis) in Bali (Indonesia)
Giraud, Gwennan ULiege

in Primate Tidings (2015, December), 33

In Bali, Indonesia, Macaca fascicularis groups are sometimes leaving in situations of high density or overpopulation. Previous researches established three models in order to explain how macaques cope ... [more ▼]

In Bali, Indonesia, Macaca fascicularis groups are sometimes leaving in situations of high density or overpopulation. Previous researches established three models in order to explain how macaques cope with high-density conditions. We tested the validity of these models for free-ranging M. fascicularis, considered as less despotic than M. mulatta on which the models have been originally tested by comparing free-ranging and captive populations. Allowing the increasing ecological validity of our research’s conclusions, the free-ranging macaques we studied had a time window of life in high density condition long enough to set up an efficient and well-established social coping strategies. The study sites of Ubud and Uluwatu consisted of respectively six and five groups of M. fascicularis. We collected demographic data using a procession counting method, and behavioural data using focal and all-occurrence sampling methods. We assessed home range size using the daily group’s GPS location. Although Ubud is a crowded space while Uluwatu is not, we recorded less home range overlap between groups in Ubud in comparison to Uluwatu. Although global aggression did not differ between both populations, aggressive and submissive time increased whereas affiliative time decreased when density increased. According to the activity budget, while time spent in affiliative contacts was shorter in higher density condition, time spent in distant affiliative behaviours was longer. Females of both populations spent longer aggressive time than males but, although they increased more submissive time and decreased more affiliative time, their increase of aggressive time was lower than this of males when density increased. A plateau in aggressions occurred when density increased. In the study conditions, macaques seem to become more hierarchically structured that known for the species. However, some evidences seem to indicate they could become less despotic as well, supporting the coping model originally tested on M. mulatta. Macaca fascicularis could be expected to combine two different coping strategies to cope with high densities. [less ▲]

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See detailPlant-animal mutualistic interaction: the case of the Uapaca trees and the western lowland gorilla (G. g. gorilla)
Petre, Charles-Albert ULiege; Tagg, Nikki; Beudels-Jamar, Roseline et al

in Primate Tidings (2012), 27

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See detailDirected seed dispersal by western lowland gorillas (G. g. gorilla) at nest sites in Southeast Cameroon: implications for regeneration of logged forests
Petre, Charles-Albert ULiege; Tagg, Nikki; Beudels-Jamar, Roseline et al

in Primate Tidings (2012), 27

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See detailAncient macro-charcoals analysis as a tool to restitute the past history of African tropical forests
Morin-Rivat, Julie ULiege; Doucet, Jean-Louis ULiege; Beeckman, Hans

in Primate Tidings (2012), 26

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See detailSeed dispersal by Western lowland gorillas (G.g.gorilla) in South East Cameroon
Petre, Charles-Albert ULiege; Tagg, Nikki; Beudels-Jamar, Roseline et al

in Primate Tidings (2011), 25

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See detailPreliminary insight into seed effectiveness of western lowland gorilla (Gorilla g.gorilla)
Petre, Charles-Albert ULiege; Tagg, Nikki; Beudels-Jamar, Roseline et al

in Primate Tidings (2011, December), 25

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See detailRole of western lowland gorilla (Gorilla gorilla gorilla) to dispersal and regeneration of commercial trees in South-East Cameroon
Petre, Charles-Albert ULiege; Tagg, Nikki; Beudels-Jamar, Roseline et al

in Primate Tidings (2011), 25

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See detailA new methodological approach to try to link past disturbances and modern landscapes
Bourland, Nils ULiege; Livingstone Smith, Alexandre; Doucet, Jean-Louis ULiege

in Primate Tidings (2011, July), 24

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