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Research article - Peer-reviewed, 2010

Feeding efficiency of planktivorous perch Perca fluviatilis and roach Rutilus rutilus in varying turbidity: an individual-based approach

Nurminen, L.; Pekcan-Hekim, Z.; Horppila, J.


The feeding rate of perch Perca fluviatilis showed high individual variation at low and moderate turbidities, when one individual had consumed more Daphnia pulex than any other fish, whereas no such variation in feeding efficiency was observed with roach Rutilus rutilus. There was a significant decrease in total consumption of D. pulex by P. fluviatilis with increasing turbidity, but no correlation was observed in the case of R. rutilus. The results suggest that the difference in the ontogeny of P. fluviatilis and R. rutilus may be detectable as behaviour-related species-specific trait differences in the early planktivorous feeding stage of the two common species. (C) 2010 The Authors Journal compilation (C) 2010 The Fisheries Society of the British Isles


inorganic substances; life history; ontogeny; prey consumption

Published in

Journal of Fish Biology
2010, Volume: 76, number: 7, pages: 1848-1855

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