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The relationship between the spatial distribution of fish, zooplankton and other environmental parameters in the Solina reservoir, Poland

Published online by Cambridge University Press:  15 September 2000

Andrzej Świerzowski ,
Małgorzata Godlewska  and
Tadeusz Półtorak
Andrzej Świerzowski
Affiliation:
Inland Fisheries Institute, ul. Oczapowskiego 10, 10719 Olsztyn, Poland
Małgorzata Godlewska
Affiliation:
International Centre of Ecology, Polish Academy of Sciences, Dziekanòw Leny, Konopnickiej 1, 05092 omianki, Poland
Tadeusz Półtorak
Affiliation:
International Centre of Ecology, Polish Academy of Sciences, Dziekanòw Leny, Konopnickiej 1, 05092 omianki, Poland
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Abstract

The hydroacoustic estimation of fish abundance and distribution in the Solina reservoir was related to other biological and hydrological parameters. The increase of fish abundance corresponded to increased levels of eutrophication expressed by Secchi-disc visibility and chlorophyll a concentration. A negative correlation between fish and zooplankton abundances was observed, with changes in the zooplankton population structure, caused by fish grazing. Vertical distribution of zooplankton and fish were affected by the thermocline. Maximal concentrations were observed in a well-illuminated surface layer at the highest temperature and oxygen concentration.

Keywords

hydroacousticsfishwater qualitydam reservoir
Type
Research Article
Information
Aquatic Living Resources , Volume 13 , Issue 5: Shallow Water Fisheries Sonar , September 2000 , pp. 373 - 377
Copyright
© Elsevier, Inra, Ifremer, Cemagref, Ird, Cnrs, 2000

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