La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Mass breeding and diet of Red-billed Quelea in the Etosha National Park, Namibia, in 1978
Auteurs :	H. H. Berry, Auteur ; R. Kyle, Auteur ; D. Kyle, Auteur
Type de document :	Article
Dans :	Ostrich (75(1-2) MAR 2004)
Article en page(s) :	66-74
Langues:	Anglais
Résumé :	Data collected in Etosha National Park during April 1978 are reviewed and compared with subsequent studies on Red-billed Queleas in Namibia and elsewhere. The 1978 colony was estimated to hold 4.8 million adults and 4.8 million fledglings, which may have consumed approximately 13 tonnes of insects and 800-1200 tonnes of grass seed during the breeding cycle. The sex ratio in a sample of 406 birds was at parity. Mean body mass of queleas was 18.2g (14.3-22.7g, SD = 1.5). Males were significantly heavier (18.7g) than females (17.6g). Both sexes contained significantly more seeds than insects in their crops. Males and females showed no statistical differences in the insect:seed ratio they consumed. There was also no statistical difference in the composition or dry mass of crop contents collected at different times of day.

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