Information Center: Environment, 1997

3 results


J P Gonzalez-Kirchner
June 8, 1997

A census was made of gorilla populations throughout the Rio Muni region in Equatorial Guinea between July 1989 and December 1990. The aim of the census was to estimate the total numbers of this species in relation with its distribution on Rio Muni region. The estimated size of the gorilla population in Rio Muni stands between 1000 and 2000 individuals.

J P Gonzalez-Kirchner
January 5, 1997

The black (Colobus satanas) and red colobus (Procolobus badius) are two of the most threatened primate species of Africa Both species live on Bioko island, Equatorial Guinea, where their habitat preferences and niche separation were analyzed.

J E Garcia, and J Mba
April 8, 1997

Equatorial Guinea has a new network of protected areas, but only Monte Alen National Park has any effective protection. As a contribution to the knowledge of this area, a survey of primate populations was carried out during a 7-month period in 1994. The results showed that there is a high primate diversity (15–16 distinct species) in Monte Alen. The three most commonly sighted monkey species were Cercopithecus nictitans (35.9–40.8 per cent of sightings), Cercopithecus cephus (28.9–43.5 per cent) and Cercopithecus pogonias (17.4–22.4 per cent). Mean distance covered to find any group of these guenons varied from 1.1km in open primary forest to 2.7 km in dense primary forest. Gorilla nests were more abundant in secondary forest near villages (5.15 nests/km), while chimpanzee nests were mostly found in primary forest (5.35 nests/km). Hunting pressure appears to be low but shifting agriculture has a significant impact on the conservation of the area. The degree of threat varies between species. Alternatives for better management of the area, such as educational programmes and sustainable use of natural resources, are suggested.

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