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Scrounging behavior regulates population dynamics.

Coolen, Isabelle; Giraldeau, Luc-Alain; Vickery, William (2007). Scrounging behavior regulates population dynamics. Oikos , vol. 116 , nº 3. p. 533-539. DOI: 10.1111/j.2006.0030-1299.15213.x.

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Résumé

The integration of behavioral and population ecology is necessary when behavior both feeds into demographic parameters and depends on population parameters. We show that scrounging behavior, the exploitation of others' resources, can affect both demographic parameters and population dynamics, including the stability of interactions with prey. Scrounging is a common tactic and its pay-offs exhibit both density- and frequency-dependence. We demonstrate that scrounging can act as a population regulator through its effects on individuals' reproductive rate and mortality. We also explore its effects on predator-prey population dynamics and show that the presence of scrounging predators allows an increased predator population size and contributes to the regulation of both predator and prey populations. Behavioral ecologists will appreciate that although scrounging is often pictured as imposing a social foraging cost to group membership, at the population level it also allows higher numbers of both prey and predators to coexist at equilibrium.

Type de document: Article
Mots-clés libres: behavioral ecology; demography; interspecific interaction; population dynamics; population ecology; predator-prey interaction
Centre: Institut national de la recherche scientifique
Date de dépôt: 02 mai 2018 18:10
Dernière modification: 02 mai 2018 18:10
URI: http://espace.inrs.ca/id/eprint/6984

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