Optimal diet selection, frequency dependence and prey renewal.

Détails

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Etat: Public
Version: de l'auteur⸱e
ID Serval
serval:BIB_AF9C89BE87A8
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Optimal diet selection, frequency dependence and prey renewal.
Périodique
Theoretical Population Biology
Auteur⸱e⸱s
Yearsley J.M.
ISSN
0040-5809
Statut éditorial
Publié
Date de publication
2003
Peer-reviewed
Oui
Volume
64
Numéro
2
Pages
129-139
Langue
anglais
Résumé
This paper extends existing models of frequency-dependent diet selection by considering the optimal diet selection of a predator feeding upon prey populations which can be depleted but are also capable of renewal (e.g. immigration, growth, or reproduction). This model and existing models which include prey depletion, predict partial-preference and a generic diet preference for the commonest prey types (apostatic selection). Unlike previous diet selection models, it is found that the optimal diet selection of an individual predator can be to favour the rarest prey type (anti-apostatic selection) when encounter rates are high, even if the individual prey do not differ in their nutritional value. Studies have demonstrated that predators generally show apostatic selection, even when all prey have the same nutritional value. Anti-apostatic selection has also been observed when prey are crowded, and therefore at high density, consistent with the idea of high encounter rates. This anti-apostatic diet selection has previously been proposed as evidence for the use of prey search images by a predator, or variation in individual prey preference. In this paper it is suggested that prey renewal is a further factor, often confounded in experiments, which could favour anti-apostatic selection.
Mots-clé
Animal Migration, Animal Nutritional Physiological Phenomena, Animals, Diet/statistics &amp, numerical data, Feeding Behavior, Food Habits, Models, Biological, Population Density, Population Dynamics, Predatory Behavior
Pubmed
Web of science
Création de la notice
19/11/2007 11:44
Dernière modification de la notice
20/08/2019 16:19
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