Acoustical estimates of fish and zooplankton distribution in the Piaseczno reservoir, Southern Poland

Abstract

Hydroacoustical surveys in the Piaseczno reservoir were performed in May and September 2002 using a Biosonics 101 dual beam echo sounder. They have revealed very scarce fish populations in pelagic waters with twice-higher abundance in autumn (530 fish ha−1) as compared with spring (280 fish ha−1). Small and very small fish (below 10 cm length) dominated… (More)
DOI: 10.1007/s10452-004-3525-0

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