La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	The ranging behaviour of a tropical forest terrestrial insectivore: the Scaly-breasted Illadopsis
Auteurs :	J. A. Lindsell, Auteur
Type de document :	Article
Dans :	Ostrich (No number JUL 2001)
Article en page(s) :	92-97
Langues:	Anglais
Résumé :	I radio-tracked 50 adult male territory holders of the Scaly-breasted Illadopsis Illadopsis albipectus in three areas with differing forest structure in Budongo, Forest,western Uganda, in order to relate aspects of ranging behaviour to generalised human impacts on forest structure. Birds followed a regular daily pattern, singing from a core area for up to two hours from dawn and then foraging for the rest of the day throughout their home range. Density (estimated using Dirichlet tessellations based on core singing areas) was higher and home ranges (100% minimum convex polygons) were smaller in degraded forest compared with both primary forest and less degraded selectively logged forest, but these differences were small. Home range size (1.21 to 1.81 ha) did not correlate with density (36.5-46.5 territories/km(2)). Overlap in home ranges was highest in degraded forest but very low in general. Birds in degraded forest had larger home ranges in the dry season compared with the wet season.

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...