Densities, Distributions, and Seasonal Movements of Gorillas and Chimpanzees in Swamp Forest in Northern Congo

@article{Poulsen2004DensitiesDA,
  title={Densities, Distributions, and Seasonal Movements of Gorillas and Chimpanzees in Swamp Forest in Northern Congo},
  author={John R. Poulsen and Connie J. Clark},
  journal={International Journal of Primatology},
  year={2004},
  volume={25},
  pages={285-306}
}
The conservation of gorillas (Gorilla spp.) and chimpanzees (Pan troglodytes) depends upon knowledge of their densities and distribution throughout their ranges. However, information about ape populations in swamp forests is scarce. Here we build on current knowledge of ape populations by conducting line transect surveys of nests throughout a reserve dominated by swamp forest: the Lac Télé Community Reserve in northern Congo. We estimated gorilla and chimpanzee densities, distributions across… 
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References

SHOWING 1-10 OF 47 REFERENCES
Hunting pressure on chimpanzees and gorillas in the Motaba River area, northeastern Congo
An extensive survey was conducted in the Motaba River Area in north­ eastern Congo. It was based on interviews and line transect surveys. The following results were obtained: (1) Both chimpanzees and…
Population density and nesting behaviour of lowland gorillas (Gorilla gorilla gorilla) in the Ngotto forest, Central African Republic
TLDR
Compared with the gorilla population of the nearby Dzanga-Sangha forest, the population density of gorillas at Ngotto was lower but the proportion of nests found above ground was much higher and it is suggested that these differences were the result of the scarcity of herbaceous vegetation in the Ngotto forest.
Population Density of Chimpanzees and Gorillas in the Petit Loango Reserve, Gabon: Employing a New Method to Distinguish Between Nests of the Two Species
We studied the vegetation and population density of chimpanzees (Pan troglodytes troglodytes) and gorillas (Gorilla gorilla gorilla) in the Petit Loango Reserve, Gabon. The study site consists mainly…
Nationwide census of gorilla (gorilla g. gorilla) and chimpanzee (Pan t. troglodytes) populations in Gabon
TLDR
Gabon's large areas of undisturbed primary forest offer exceptional potential for conservation, not only of gorillas and chimpanzees, but also of the intact tropical rain forest ecosystems which they inhabit.
Census of gorillas in northern Republic of Congo
TLDR
The limited sample presented shows that gorillas are widespread and common in northern Congo, even in the swamp forests previously considered unsuitable as gorilla habitat, and it is probable that Congo holds the largest population of gorillas in Africa after Gabon.
Status and conservation of primates in Odzala National Park, Republic of the Congo
A survey of diurnal primate populations was carried out in Odzala National Park, Republic of the Congo, over 3 months in 1994 and 2 months in 1995. The park contains a high diversity and…
Preliminary assessment of the impacts of human activities on gorillas Gorilla gorilla gorilla and other wildlife at Dzanga-Sangha Reserve, Central African Republic
Abstract The aim of this study was to make preliminary assessments of the effects of human activities on the gorillas and other wildlife in the Dzanga-Ndoki Park and broader Dzanga-Sangha Dense…
Relationship between chimpanzee (Pan troglodytes) density and large, fleshy‐fruit tree density: Conservation implications
TLDR
A predictive trend was found between chimpanzee nest density and large, fleshy‐fruit tree density, which may offer a quick, reasonably reliable method of estimating potential chimpanzee densities in previously unsurveyed habitats and may be used to evaluate the suitability of possible re‐introduction sites.
Habitat alteration, hunting and the conservation of folivorous primates in African forests
Abstract The colobus monkeys and gorillas of African forests share a strong tendency to depend on foliage during lean seasons. In many areas, both kinds of primate are threatened by habitat…
Ecological Constraints on the Foraging Effort of Western Gorillas (Gorilla gorilla gorilla) at Bai Hoköu, Central African Republic
  • M. Goldsmith
  • Geography
    International Journal of Primatology
  • 2004
Recent studies demonstrate that western lowland gorillas incorporate much more fruit into their diet than Virunga mountain gorillas do. Very little is known, however, about how the frugivorous…
...
1
2
3
4
5
...