Abstract
Annual cycles of growth, feeding rate, gross conversion efficiency and hematocrit levels are described in sea bass ( Dicentrarchus labrax L.) both in animals adapted to sea water (salinity 37.8‰) and to well water of low salinity (3.5‰). Specific growth rate followed the seasonal variations of water temperature in both media but with a very important exception during the summer. Specific growth rate and daily food intake showed a linear relationship. The differences in gross conversion efficiency, hematocrit levels and the condition of the fish were observed throughout the year and are discussed in relation to salinity, temperature, photoperiod and sexual condition. A practical application for culture of the species in relation to salinity is suggested.
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