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Stratégies d'exploitation des ressources en fonction du sexe et de la saison chez une espèce grégaire, le Chocard à bec jaune (Pyrrhocorax graculus)

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URI: http://hdl.handle.net/2042/54722
Title: Stratégies d'exploitation des ressources en fonction du sexe et de la saison chez une espèce grégaire, le Chocard à bec jaune (Pyrrhocorax graculus)
Author: DELESTRADE, Anne
Description: The frequentation of a clumped food resource by a foraging flock of a social corvid species, the Alpine Chough Pyrrhocorax graculus was studied between November 1990 and May 1991 at a refuse tip according to sex and season. Site frequentation, interactions and success rates were shown to vary with sex and season. Females were less aggressive than males, their success rate was lower, and they principally used low bird density areas where interaction rates were low. Female attendance increased in spring in parallel to their interaction success rate. Among females, those whose weight exceeded the median value were most frequently seen, especially in the area where highest interaction rates were observed. This suggests that alpine choughs use different foraging strategies in order to exploit clumped resources according to their social status (i.e. sex, physical caracteristics) and season
Subject: Comportement alimentaire; Interaction sociale; Statut social; Sexe; Variation saisonnière; Disponibilité; Ressource alimentaire; Pyrrhocorax graculus; Feeding behavior; Social interaction; Social status; Sex; Seasonal variation; Availability; Food supply
Publisher: Société nationale de protection de la nature et d'acclimatation de France, Paris (FRA)
Date: 1993

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