4 research outputs found
Inventaire de la faune mammalogique d’une forêt urbaine, le Parc National du Banco, Côte d’Ivoire
Le Parc National du Banco,forêt sempervirente à l’intérieure de la capitale économique de la Côte d’ivoire a toujours constitué une curiosité. Dans la période du 11 avril 2013 au 19 avril 2013 nous avons effectué dans cette forêt un inventaire des mammifères. Les méthodes utilisées sont celles des transects linéaires pour les grands mammifères et la méthode de capture pour la plupart des petits mammifères. Nos résultats indiquent que, les grands mammifères rencontrés sont constitués de primates (Cercopithecus campbelli lowei, Cercopithecus petaurista et Pan troglodytes verus), d’ongulés (Tragelaphus scriptus, Philantomba maxwellii, et Neotragus pygmaeus) et de carnivores (Genetta tigrina, Crossarchus obscurus et Civettictis civetta). D’une manière générale, l’indice kilométrique d’abondance de ces groupes taxonomiques est faible (0,022 à 0,12). Le chimpanzé d’Afrique de l’Ouest (Pan troglodytes verus), espèce en danger selon l’Union pour la Conservation de la Nature existe encore dans cette forêt. Au niveau des petits mammifères plusieurs espèces de rongeurs, d’insectivores et de chiroptères ont été inventoriées lors de notre étude. Parmi ces espèces, la chauve-souris paillée (Eidolon helvum) et la Musaraigne de Wimmer (Crocidura wimmeri) sont en danger d’extinction selon l’UICN. Toutefois, la présence humaine à proximité du parc constitue une réelle menace pour son intégrité.Mots clés : Mammifères, chimpanzé, chauve-souris, insectivore
The diurnal primate community of the Tanoé Forest: species composition, relative abundance, distribution, polyspecific associations and conservation status
The Tanoé Forest is located within the original distribution area of the Miss Waldron red colobus (Piliocolobus badius waldronae), the diana roloway (Cercopithecus diana roloway) and the white napped mangabey (Cercocebus atys lunulatus). These three monkey species are classified by IUCN among the 25 most threatened monkeys of the world. Surveys conducted in their believed distribution area in Côte d’Ivoire from 2004 to 2007 highlighted an advanced degradation of habitats, an intensive hunting activity and a subsequent local extinction of some primate species. Field survey conducted in the Tanoé Swamp Forest shown that there is an exception in this dramatic context since this forest still housing threatened species such as the Diana roloway, the white-napped mangabey, and other monkeys of conservation concern: the Geoffroy’s colobus (Colobus vellerosus) and the olive colobus (Procolobus verus), and probably a viable Miss Waldron monkeys population (Piliocolobus waldronae). In addition, this forest hosts the Lowe’s guenon (Cercopithecus campbelli lowei) and the lesser spot-nosed guenon (Cercopithecus petaurista petaurista), that are widespread in the Tanoé Swamp Forest.Keywords: Tanoé forest, primate community, endangered, Swamp Forest, distributio
Same but Different: Intersexual and Age-Related Habitat Use of the Threatened West African Trionyx triunguis Clade—A Four-Country Comparative Study
Biological communities are structured by a variety of biotic and abiotic relationships, whose understanding forms the basis for effective conservation. Among the myriad factors influencing community dynamics, resource partitioning stands out, potentially enriching ecosystem complexity but also carrying risks for conservation if disregarded. In this study, we investigated intersexual and ontogenetic niche differences among populations of the West African softshell turtle Trionyx triunguis in Liberia, Cote d'Ivoire, Ghana and Nigeria. We observed that these distinct populations exhibited similar habitat preferences, favouring large rivers with abundant riverbank and aquatic vegetation, and muddy substrates. Disparities in habitat preferences were evident among populations and across various life stages, indicating the adaptability of the species. We found that the species was active throughout the year, but most of our sightings and captures occurred during the wet season. In light of the species' vulnerability to overhunting, our research findings provide important data on the ecology of this species that can assist in its effective conservation across all life stages