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Satiation effects in piscivore prey size selection

Författare:
Publiceringsår: 2006
Språk: Engelska
Sidor: 78-85
Publikation/Tidskrift/Serie: Ecology Of Freshwater Fish
Volym: 15
Nummer: 1
Dokumenttyp: Artikel
Förlag: Blackwell Publishing

Sammanfattning

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.

Disputation

Nyckelord

  • Biology and Life Sciences

Övriga

Published
Yes
  • ISSN: 0906-6691

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