DAILY FORAGING CYCLE, AND DAILY FOOD RATION OF ROACH RUTILUS RUTILUS (L.) IN BACHOTEK LAKE (BRODNICKIE LAKELAND) IN SPRING
The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn
ABSTRACT. Food composition, and feeding intensity of roach in a daily cycle was studied. Daily food ration, calculated according to Thorpe (1977) for roach of average body weight 6.44 g, at average water temperature 14.1oC, was equal to 2.5% of fish body weight.
Key words: ROACH, FOOD, DAILY RATION, LAKE.