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Satiation effects in piscivore prey size selection

Author:
  • Håkan Turesson
  • Christer Brönmark
  • Annett Wolf
Publishing year: 2006
Language: English
Pages: 78-85
Publication/Series: Ecology of Freshwater Fish
Volume: 15
Issue: 1
Document type: Journal article
Publisher: Wiley-Blackwell

Abstract english

We present a functional response model that primarily evaluates effects of satiation in piscivore prey-size selection. The model also includes other passive processes, such as prey-size-dependent encounter rate and prey-size-dependent capture success, where capture success decreases and encounter rate increases with prey size. The model generates a wide variety of outcomes, where small, intermediate or large prey is positively selected for. These very different selectivity patterns are generated without any active prey choice included in the model. The results stress the importance of controlling for satiation and other passive processes in empirical studies on prey-size selection, especially if the aim is to test active prey choice in piscivores.

Keywords

  • Physical Geography
  • Ecology

Other

Published
  • ISSN: 0906-6691
Christer Brönmark
E-mail: christer [dot] bronmark [at] biol [dot] lu [dot] se

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Division aquatic ecology

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+46 73 081 55 48

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Professor

Aquatic Ecology

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Professor

Division aquatic ecology

+46 46 222 37 02

+46 73 081 55 48

E-C125

Sölvegatan 37, Lund

50

Research group

Aquatic Ecology

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