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Influence of visual conditions on foraging and growth of juvenile fishes with dissimilar sensory physiology
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap.
2007 (engelsk)Inngår i: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 70, nr 5, s. 1319-1334Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The influence of turbidity on foraging and growth of young-of-the-year (YOY) of two percid species with relatively dissimilar sensory physiology, perch Perca fluviatilis and pikeperch Sander lucioperca was tested. A littoral mysid, Neomysis integer, was used as prey. Functional response was investigated indoors at two levels of turbidity, 3 NTU (clear) and 25 NTU (turbid). Growth and consumption rate were studied both during day and night in outdoor experiments at similar turbidity levels. Pikeperch were not affected by turbid conditions in either of the experiments. Foraging of perch, on the other hand, was significantly negatively affected by higher turbidity in the functional response experiments and during the night-time in the outdoor experiments. As opposed to pikeperch, consumption rates of perch decreased markedly during nights. Perch also grew more slowly in the treatments with turbid water. The dissimilar reactions of the two species indicate that sensory physiological adaptations and foraging behaviour are important factors that partly can explain disparate reactions of YOY fishes to the level of turbidity.

sted, utgiver, år, opplag, sider
2007. Vol. 70, nr 5, s. 1319-1334
Emneord [en]
Foraging, Growth, Perch, Pikeperch, Turbidity, Visual
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Identifikatorer
URN: urn:nbn:se:miun:diva-8465DOI: 10.1111/j.1095-8649.2007.01412.xISI: 000245813000001Scopus ID: 2-s2.0-34247389685OAI: oai:DiVA.org:miun-8465DiVA, id: diva2:139825
Tilgjengelig fra: 2009-01-26 Laget: 2009-01-26 Sist oppdatert: 2017-12-14bibliografisk kontrollert

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