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The aim of the study was to compare the effects of rearing juvenile pikeperch in two types of tanks used widely in hatcheries; the tanks had either round (group O) or square (group K) bottoms. Two experiments were conducted. In experiment I, the mean initial body weight (m.c.) of the fish was 0.33 g, and in experiment II it was 1.76 g. The factor studied (tank shape) had a significant impact on the...
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