Foraging behaviour and capture success in perch, pikeperch and pike and the effects of prey density
Year: 2004
Type: article
Abstract: The effect of school size on capture success in three different piscivores, perchPerca fluviatilis, pikeperchStizostedion luciopercaand pikeEsox lucius, was investigated. RoachRutilus rutiluswere used as prey in a pool experiment where individual predators were presented prey at densities of one, two, four, eight and 16 prey, respectively. Treatments were replicated seven times for each predator species. Perch was at first virtually unable to capture a prey from a school and suffered a significant confusion effect with increasing prey density. The effect, however, was limited in the long run, as the perch was a very effective predator in its hunting strategy where it singled out and repeatedly attacked single prey irrespective of prey density or school size. Pikeperch and pike were able to attack and capture prey at any prey density equally successfully and thus did not suffer from a confusion effect. Neither did these predators receive any apparent advantages from increasing prey density.
Source: Journal of Fish Biology
Authors: H. Turesson, C. Brönmark
Institution: Lund University
Language: English
Subfield: Nature and Landscape Conservation
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2168339915