Seasonal variation in the feeding ecology of the grey‐cheeked mangabey (<i>Lophocebus albigena</i>) in Cameroon

Poulsen, John R.; Clark, Connie J.; Smith, Thomas B.

doi:10.1002/ajp.1015

Cited by 111 publications

(80 citation statements)

References 24 publications

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“…We selected Uapaca species because they were the most common seeds in primate faeces and their fruits were important in the diets of primates (Poulsen et al 2001). These seeds were planted and monitored in the same fashion as passed seeds.…”

Section: Germination Of Passed Seedsmentioning

confidence: 99%

Seed dispersal by a diurnal primate community in the Dja Reserve, Cameroon

2001

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ABSTRACT. Multiple species of primate disperse seeds and differentially contribute to the seed rain in tropical forests. The goal of this study was to examine seed dispersal by a primate community of five monkey and two ape species in the Dja Reserve, Cameroon. The density of primates in the reserve was calculated to be 77 individuals km. Analysis of 5789 faecal clumps demonstrated that 40% of monkey and 74% of ape faecal clumps possessed whole seeds. Six of the seven focal species acted as seed dispersers; faecal clumps passed by the black-and-white colobus (Colobus guereza) did not contain any whole seeds during the study. Seed passage trials on four captive monkey species showed monkeys to have an average seed passage time of 22 hours and defecation rate of five times per day. From the above results, the primate community was estimated to defecate 1129 seeds kmSeeds passed by the primate community came from 125 species of trees, lianas and shrubs, equivalent to at least 34% of the known tree flora. Rarefaction curves indicated that additional collection effort would identify more seed species passed by primates. Germination studies demonstrated that primate-passed seeds are viable. The number of seeds and plant species dispersed suggests that the primate community plays an important role in the maintenance of forest structure.

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Section: Germination Of Passed Seedsmentioning

confidence: 99%

Seed dispersal by a diurnal primate community in the Dja Reserve, Cameroon

2001

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“…Dietary research highlights the impacts of environmental factors that most affect animal ecology (Poulsen et al 2001) and explains the constraints which limit their distribution. The exploitation of rare or difficult-to-digest resources by some primates may aid in their ability to avoid competition with other animals in their environment (Ganzhorn 2002), and may also lead to evolutionary advantages regarding health and anti-predator de fence systems (Forbey et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Medicinal plant exudativory by the Bengal slow loris Nycticebus bengalensis

Das¹,

Nekaris²,

Bhattacharjee³

2014

Endang. Species. Res.

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Slow lorises are members of a rare guild of obligate exudativores. Secondary metabolites in their diet have been implicated as contributing to the evolution of both their slow basal metabolism and their venom. No long-term study has yet examined the feeding ecology of the largest of the lorises, the Bengal slow loris Nycticebus bengalensis. We conducted an 18 mo study from June 2008 to December 2010 in Hollongapar Gibbon Wildlife Sanctuary, Assam, India, to investigate whether Bengal slow lorises prefer gum, and whether there is any evidence of secondary metabolites in their diet. We detected the lorises along line transects using existing trails and followed each animal as long as possible, recording selected behaviours via focal instantaneous sampling. We recorded 629 feeding incidents during 270 night walks. We found that up to 80.9% of feeding bouts were of plant exudates, followed by bark, floral parts, insects, fruits, and tender (i.e. immature) leaves. Within the plant exudate category, 5 species were consumed in 71% of the total exudate feeding bouts: Terminalia chebula, Mesua ferrea, T. arjuna, Ficus hispida and Dillenia indica. These species all have high medicinal value and are commonly used by the local communities for traditional medicinal purposes. Absorption of secondary metabolites from these plants may explain unusual healing patterns observed in wild slow lorises, but lacking in lorises held in captivity. Their dietary affinity towards medicinal plants could explain patterns of use of slow lorises within the traditional medicine trade in the Indo-Chinese region. 23: 149-157, 2014 to-digest secondary metabolites (Heymann & Smith 1999). Only 6 primate genera (Calithrix, Mico, Ce buella, Phaner, Euoticus and Nycticebus) are known to access these foods through active excavation of plant surfaces (Starr & Nekaris 2013). These obligate exudativores include exudates in ≥40% of their feeding time (hereafter referred to as diet; Nash & Burrows 2010). KEY WORDS: Lorisidae · Exudativory · Feeding ecology · Secondary metabolite · India Resale or republication not permitted without written consent of the publisher Contribution to the Theme Section 'Conservation and ecology of slow lorises' FREE REE ACCESS CCESSEndang Species ResUntil the mid-1990s, virtually nothing was known about the feeding ecology of wild slow lorises (Nycticebus spp.), and the discovery that these small primates consumed large quantities (comprising nearly 40 to 90% of the diet) of exudates was surprising; indeed it had been predicted that like the similarly non-leaping pottos of Africa, loris diet would comprise mainly fruits (Ravosa 1998). Several morphological characters of these nocturnal strepsirrhines suggest the presence of obligate exudativory, including a stout toothcomb, small body size, a large caecum, a long tongue, wide U-shaped legs and enlarged hand pads for gripping (Hladik 1978. Wiens et al. (2006), Swapna et al. (2009) and Starr & Nekaris (2013) all provided strong evidence that exudates are a preferred ...

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“…Moreover, food availability is considered to be another potential factor affecting group size [Chapman, 1995;Olupot et al, 1997;Poulsen et al, 2001], group cohesion [Wrangham, 1980;van Schaik, 1989;Janson and Goldsmith, 1995] and habitat use [Dunbar, 1988]. We focused on food availability during the peak fruiting season in Sentier Nature forest in Sette Cama.…”

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confidence: 99%

How Many for Lunch Today? Seasonal Fission-Fusion Dynamics as a Feeding Strategy in Wild Red-Capped Mangabeys (Cercocebus torquatus)

Dolado

Cooke²,

Beltran³

2016

IJFP

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For group-living primates, social organization hinges upon multiple factors, including group size, group cohesion, and the group's age and sex composition. Fission-fusion dynamics reduce the risks of living in a large group, which can include feeding competition related to the seasonality of resources. Here we report on the group dynamics (i.e. formation of parties) of a population of red-capped mangabeys (Cercocebus torquatus) located in Sentier Nature forest, South Loango National Park, Gabon, and examine the role of fruit availability in episodes of fission-fusion and shifting range use during the peak fruiting season of 2014. To assess fission-fusion dynamics, we obtained data on party type (i.e. number, size and age-sex composition), the effect of availability of fruit from 4 tree species on the home range and habitat used by parties, and the periodicity of these processes. The results show that red-capped mangabeys displayed seasonal fission-fusion dynamics related to fruit availability during the season under study.

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Seasonal variation in the feeding ecology of the grey‐cheeked mangabey (Lophocebus albigena) in Cameroon

Cited by 111 publications

References 24 publications

Seed dispersal by a diurnal primate community in the Dja Reserve, Cameroon

Seed dispersal by a diurnal primate community in the Dja Reserve, Cameroon

Medicinal plant exudativory by the Bengal slow loris Nycticebus bengalensis

How Many for Lunch Today? Seasonal Fission-Fusion Dynamics as a Feeding Strategy in Wild Red-Capped Mangabeys (Cercocebus torquatus)

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