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Overwinter changes in mass and lipid content of Perca fluviatilis and Gymnocephalus cernuus

Overwinter changes in mass and lipid content of Perca fluviatilis and Gymnocephalus cernuus

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ECKMANN, Reiner, 2004. Overwinter changes in mass and lipid content of Perca fluviatilis and Gymnocephalus cernuus. In: Journal of Fish Biology. 65(6), pp. 1498-1511. ISSN 0022-1112. eISSN 1095-8649. Available under: doi: 10.1111/j.0022-1112.2004.00553.x

@article{Eckmann2004Overw-7551, title={Overwinter changes in mass and lipid content of Perca fluviatilis and Gymnocephalus cernuus}, year={2004}, doi={10.1111/j.0022-1112.2004.00553.x}, number={6}, volume={65}, issn={0022-1112}, journal={Journal of Fish Biology}, pages={1498--1511}, author={Eckmann, Reiner} }

Eckmann, Reiner application/pdf 2011-03-24T17:35:20Z Overwinter changes in mass and lipid content of Perca fluviatilis and Gymnocephalus cernuus 2004 eng First publ. in: Journal of Fish Biology 65 (2004), pp. 1498 1511 deposit-license 2011-03-24T17:35:20Z The body condition, lipid reserves and mortality of 0 and 1 year-old perch Perca fluviatilis andruffe Gymnocephalus cernuus, sampled during the winter in Lake Constance, Germany, were compared. Length-frequency analyses did not provide evidence for overwinter mortality ineither species. The fresh and dry mass of perch as well as their lipid contents decreased during winter, while ruffe were heavier and contained more lipid at the end of the winter. The superior<br />performance of ruffe was mainly attributed to its sensory capabilities, which allowed it to ingest zoobenthos throughout the winter, while the zooplankton feeding of perch was constrained bylow light levels. In lakes that undergo a process of re-oligotrophication, this advantage of ruffe over perch may be even more pronounced, since lower food supply during the growth season and thus lower fish lipid content at the start of winter is probably better tolerated by ruffe than by perch. Eckmann, Reiner

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