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(Article of periodic en Français - 1981)

Document title

Capacités prédatrices et budgets d'activité chez l'aigle pêcheur, Haliaeetus vocifer

Authors(s) and Affiliation(s)

THIOLLAY J. M. ;

Abstract

Ten pairs of Fish Eagles, taken among a dense population in Uganda, were followed at the end of the breeding season to compare the time and energy budgets of breeding and non breeding adults. The food consumption of adults with young is higher than that of adults without young| but the difference is smaller than the increase of the energetic cost of breeding (42 % and 64 % for 1 and 2 fledged young). Thus brood size seems to be limited by the ability of the parents to feed their young and maintain a territory of adequate size or quality. Immature birds suffer heavily from the adults'territorial behaviour| this may explain their high mortality rate (83 % during the first four years).

Source

Article of periodic

published at : Revue d'écologie. La terre et la vie Paris

Editor :

Millesime : 1981, vol. 35, no4 [pp. 537-562]

Bibliographic references : 53 réf.

Language

Français

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