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Producers, Scroungers, and Group Foraging.

Vickery, William; Giraldeau, Luc-Alain; Templeton, Jennifer J.; Kramer, Donald L.; Chapman, Colin A. (1991). Producers, Scroungers, and Group Foraging. American Naturalist , vol. 137 , nº 6. p. 847-863. DOI: 10.1086/285197.

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Résumé

Develops a model that reconciles information-sharing and producer-scrounger models of group foraging. The model includes producers, scroungers, and an opportunistic forager that can both produce and scrounge but with reduced efficiency. These three strategies can coexist only in the unlikely case that the opportunist's loss in searching ability is exactly equal to its gain in scrounging ability, but all pairs of strategies can coexist. Three parameters control the proportions of coexisting strategists: degree of compatibility between the opportunist's producing and scrounging activities; proportion of food patches that are shared with scrounging individuals; and effective group size. When there is little incompatibility between producing and scrounging, opportunists will always be present, unless the producer is able to consume most of the patch without sharing. The opportunist strategy is always excluded to consume most of the patch without sharing. The opportunist strategy is always excluded when there is a high degree of incompatibility between producing and scrounging.

Type de document: Article
Mots-clés libres: foraging; group behaviour; scrounger
Centre: Institut national de la recherche scientifique
Date de dépôt: 02 mai 2018 15:30
Dernière modification: 04 mai 2018 13:01
URI: http://espace.inrs.ca/id/eprint/7093

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