Notes on habitat use by the Russet-eared guenon (<i>Cercopithecus erythrotis</i>Waterhouse 1838) on Bioko island, Equatorial Guinea

González-Kirchner, Juan Pedro

doi:10.1080/03946975.1996.10539313

Cited by 5 publications

(3 citation statements)

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“…As in Cameroon (Gartlan & Struhsaker, 1972), they fled usually here also on the ground, not in the trees, from man. The other sympatrtic guenons in the island; Cercopithecus nictitans, Cercopithecus pogonias and Cercopithecus erythrotis are all strictly arboreal, and only Cercopithecus erythrotis reaches altitudes over 1400 m over sea level (Gonzalez-Kirchner, 1996a, 1996b. Habitat preferences would appear to separate the population of Preuss's guenon from all another guenon species on Bioko island.…”

Section: Discussionmentioning

confidence: 97%

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Habitat preference of the Preuss's guenon(Cercopithecus preussi), on Bioko island, Equatorial Guinea

Kirchner

2004

Hum. Evol.

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The Preuss's guenon (Cercopithecus preussi) is considered to be one of the most threatened African primates. There is little information on the ecology and status of this primate on Bioko island, where it is found in the form of an endemic subspecies. The Preuss's guenon shows preference for the Schefflera forest and the mountain habitat on Bioko island.As on the mainland they also have semiterrestrial habits, and are found usually at the understorey of the forest. Competitive exclusion between this guenon and other guenon species could be an explanation of these ecological preferences. Habitat use and vertical stratification of the activity in the forest canopy seem to reduce competition with other sympatric primate species that inhabit on the island. Habitat destruction, and isolation in a reduced habitat, show to be the major threats for the survival of this primate on Bioko island.

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Section: Discussionmentioning

confidence: 97%

“…Observational methods followed to study habitat use were those proposed by Mittermeier & van Roosmalen (1981) and McGraw (1994), and used in previous studies (Gonzalez-Kirchner, 1994, 1996a, 1996b. Observational data were collected alongside transects that cover proportionally all the different habitats represented on Mount Basile.…”

Section: Introductionmentioning

confidence: 99%

Habitat preference of the Preuss's guenon(Cercopithecus preussi), on Bioko island, Equatorial Guinea

Kirchner

2004

Hum. Evol.

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“…Cercopithecus ascanius was also located in many nonprotected, variable‐sized forest fragments around Kampala, Uganda, and was considered abundant in most of these sites (Baranga, 2004). Similarly, C. erythrotis was found to be the only diurnal primate to occur in most forest types across Bioko Island, Equatorial Guinea, making it the most abundant and widespread primate there (Gonzalez‐Kirchner, 1996).…”

Section: Discussionmentioning

confidence: 99%

Correlates with the distribution and abundance of endangered Sclater’s monkeys (Cercopithecus sclateri) in southern Nigeria

Baker

Olubode

2008

African Journal of Ecology

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A distribution survey of the endangered Sclater's monkey (Cercopithecus sclateri) was conducted over a wide area in southern Nigeria using forest surveys and hunter interviews. Sclater's monkey, Nigeria's only endemic primate species, is restricted to a land area of about 28,500 km 2 in the densely human-populated, oil-producing region of southern Nigeria. Results indicate that this species is not as rare as previously thought; we confirmed its presence in 27 formerly unknown sites. Based on encounter-rate and distribution data, Sclater's monkey is one of the two most abundant diurnal primate taxa across its range. However, the species primarily occupies isolated and degraded forest fragments. Although hunting is widespread, selective hunting of larger-bodied primate taxa offers some respite for the smaller Sclater's monkey. We encountered this species more frequently in forests with relatively high hunting pressure, possibly indicating competitive release in the heavily hunted forests of southern Nigeria. Long-term persistence of Sclater's monkey, which has no official protection throughout its range, depends on the willingness of hunters to target smaller-bodied wildlife (effortprofit trade-off), local bushmeat demand and protection of key forest fragments and the few larger forests in the region. Nous avons rencontré cette espèce plus fréquemment dans les forêts où la pression de la chasse était relativement forte, ce qui indique peut-être un relâchement de la compétition dans les forêts du sud du Nigéria où la chasse est très intense. La survie à long terme du moustac de Sclater, qui ne bénéficie d'aucune protection officielle dans toute son aire de répartition, dépend de la décision des chasseurs de cibler aussi des espèces plus petites (compromis effort ⁄ profit), de la demande locale pour la viande de brousse et de la protection des fragments de forêt critiques et des quelques plus grandes forêts de la région.

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Degree of terrestrial activity of the elusive sun‐tailed monkey (Cercopithecus solatus) in Gabon: Comparative study of behavior and postcranial morphometric data

Motsch

Flohic

Dilger

et al. 2015

American J Primatol

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We carried out a multidisciplinary study linking behavioral and morphological data from a little-known guenon species, Cercopithecus solatus, endemic to Gabon. Over a period of 9 months, we documented the pattern of stratum use associated with postural and locomotor behavior by direct observation (650 hrs) of a semi-free-ranging breeding colony. We also conducted a morphometric analysis of the humerus and limb proportions of 90 adult specimens from 16 guenon species, including C. solatus. Field observations indicated that C. solatus monkeys spent a third of their time on the ground, similar to semi-terrestrial guenon species. We detected two patterns of stratum use: at ground level, and in trees, at a height of 3-10 m. The monkeys spent more time on the ground during the dry season than the wet season, feeding mainly at ground level, while resting, and social behaviors occurred more frequently in the tree strata. Our study of humerus size and shape, together with the analysis of limb proportions, indicated morphofunctional adaptation of C. solatus to greater terrestriality than previously thought. We therefore characterize C. solatus as a semi-terrestrial guenon, and propose a new hypothesis for the ancestral condition. By combining behavioral and morphological results, we provide new information about the adaptive strategies of the species, and the evolutionary history of guenons, thus contributing to the conservation of the sun-tailed monkey in the wild.

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Notes on habitat use by the Russet-eared guenon (Cercopithecus erythrotisWaterhouse 1838) on Bioko island, Equatorial Guinea

Cited by 5 publications

References 10 publications

Habitat preference of the Preuss's guenon(Cercopithecus preussi), on Bioko island, Equatorial Guinea

Habitat preference of the Preuss's guenon(Cercopithecus preussi), on Bioko island, Equatorial Guinea

Correlates with the distribution and abundance of endangered Sclater’s monkeys (Cercopithecus sclateri) in southern Nigeria

Degree of terrestrial activity of the elusive sun‐tailed monkey (Cercopithecus solatus) in Gabon: Comparative study of behavior and postcranial morphometric data

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