Long‐term variation in mangabey (<i>Cercocebus albigena johnstoni</i> Lydekker) feeding in Kibale National Park, Uganda

Olupot, William

doi:10.1046/j.1365-2028.1998.110-89110.x

Cited by 39 publications

(35 citation statements)

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“…Furthermore, by comparing groups of L. albigena at different protected areas in Africa, we implicitly assume that ecological variables important to the feeding ecology of mangabeys will likely vary more between distant sites (across Africa) than among neighboring sites. With these caveats in mind, we compare results of our study with those of similar studies at the Lopé Reserve, Gabon [Ham, 1994], and the Kibale National Park, Uganda [Waser, 1977;Olupot, 1998]. Ideally, cross-continent studies should be conducted concurrently with previously agreed upon methodologies.…”

Section: Comparison With Other Studiesmentioning

confidence: 72%

“…Then we compare our findings with those of studies from the Kibale National Park, Uganda [Waser, 1977;Olupot, 1998], and the Lopé Reserve, Gabon [Ham, 1994], to determine if the feeding ecology of L. albigena is variable across regions. This study is important because it presents the first long-term data for L. albigena in Cameroon, and it takes advantage of previous research examining patterns in primate feeding ecology across Africa.…”

Section: Introductionmentioning

confidence: 83%

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

Poulsen

Clark

Smith

2001

American J Primatol

109

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Seasonal fluctuations in resource abundance often cause primates to change their feeding behavior and ecology. The objective of this study was to examine the response of a largely frugivorous monkey, the grey-cheeked mangabey (Lophocebus albigena), to seasonal variations in fruit abundance. We used 15-min scan sampling to quantify feeding, activity, and habitat use by monkeys between February and December 1998 in the Dja Reserve, Cameroon. L. albigena were found to have omnivorous feeding habits, consuming the fruits, seeds, leaves, and flowers of 132 plant species. Although monkeys fed from many plant species, only five plant species accounted for 45% of all feeding records. The number of feeding observations on a plant species was significantly correlated with its fruit production. L. albigena responded to fruit-lean periods by shifting from a diet dominated by fruit to one dominated by seeds, flowers, and young leaves. This diet shift coincided with greater use of swamp habitat and higher dietary diversity. L. albigena spent the greatest percentage of scan samples feeding and traveling, but activities varied significantly over the day. Individuals spent a significantly higher percentage of scan samples feeding during the fruit-rich season than in the fruit-lean season. Comparing our results to those of studies in Gabon and Uganda, we found that L. albigena differ across regions in the number of plant species they consume and time spent feeding. These differences may be a result of variations in tree diversity or the strength of seasonal fluctuations in resource abundance among sites.

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Section: Comparison With Other Studiesmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 83%

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

Poulsen

Clark

Smith

2001

American J Primatol

109

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“…A large group of R. bieti remained cohesive throughout the year, but between mid-June and July, coinciding with the presence of bamboo shoots (an important seasonal component of the snub-nosed monkey's diet), the group manifested several fission and fusion events. Moreover, relationships between ranging patterns and food availability in Cercocebus and Lophocebus have been reported by different authors [Mitani, 1989;Olupot et al, 1994Olupot et al, , 1997Olupot, 1998;Poulsen et al, 2001]. Despite this, Wittiger and Boesch [2013] showed that female gregariousness in western chimpanzees (Pan troglodytes verus) increased when fruit resources were more clumped and when a number of females in oestrus were present.…”

Section: Discussionmentioning

confidence: 84%

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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“…In both mangabey species, males sometimes leave the group temporarily (Waser & Floody 1974;Olupot 1999;Range 2005) and solitary males have been observed to feed in fig trees up to 500 m from their group (K.R.L. Janmaat, unpublished data).…”

Section: Who Knows Best?mentioning

confidence: 99%

“…For grey-cheeked mangabeys, we focused on the strangler fig, Ficus sansibarica (Moraceae), a highly preferred food of grey-cheeked mangabeys (Waser 1974(Waser , 1977Barrett 1995;Olupot 1999). The ripe fruit ranged in size from 1.4 to 5.1 cm.…”

Section: Study Speciesmentioning

confidence: 99%

Evidence for a spatial memory of fruiting states of rainforest trees in wild mangabeys

2006

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We investigated the ranging behaviour of two groups of wild mangabey monkeys (sooty mangabeys, Cercocebus torquatus atys, and grey-cheeked mangabeys, Lophocebus albigena johnstoni) relative to a number of preselected target trees within their home range. We observed the groups' visiting patterns and speed when they approached within a critical distance of a target tree as a function of the tree's fruiting state. For both groups, the likelihood of coming into sight or actually entering these trees was significantly higher if fruit was available. Target trees with fruit were also approached significantly faster than were trees without fruits. These behavioural differences were unlikely to be the result of auditory, visual or olfactory cues available over long distances, suggesting that monkeys relied on spatial memory to (1) relocate fruit trees and (2) distinguish between trees that had and had not carried fruit in the immediate past. Results further indicated that the monkeys clearly distinguished between different types of fruit-bearing target trees. We suggest that the monkeys used memory of previous feeding experience to assess each tree's differences and were able to anticipate changes in fruit quality. We found no evidence that individuals belonging to a particular age or sex class led the group towards trees with fruit more often than did others.

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Long‐term variation in mangabey (Cercocebus albigena johnstoni Lydekker) feeding in Kibale National Park, Uganda

Cited by 39 publications

References 0 publications

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

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

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

Evidence for a spatial memory of fruiting states of rainforest trees in wild mangabeys

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