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12/06/2014

Planktonic or non-planktonic food in young-of-the-year European perch Perca fluviatilis in ponds

M Bláha, Ivana Šetlíková, Jiří Peterka, J Musil, T Policar
Journal of Fish Biology, 2014, 85(2): 509-515
DOI: 10.1111/jfb.12427
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Higher biomass especially of some aquatic macrophyte species offered a higher density of phytophilous zoobenthos, but did not increase the proportion of non-planktonic to planktonic prey in young-of-the-year perch Perca fluviatilis. Both abundance and biomass of non-planktonic prey dominated over planktonic prey in the pond with lower biomass of aquatic macrophytes and lower food. Survival of P. fluviatilis was lower (20%) in the pond with lower food than in the other pond (34%), however, specific growth rate (1·3% day−1) and final Fulton’s condition factor of P. fluviatilis were similar in both ponds.

Keywords: aquatic macrophytes; Perca fluviatilis; perch; phytophilous zoobenthos; sediment zoobenthos; semi-intensive fish culture; zooplankton