Acta Ichthyologica et Piscatoria 17(2): 55-68, doi: 10.3750/AIP1987.17.2.05
Diet composition and daily feeding patterns of Rutilus rutilus (L.) in Włocławek Dam Reservoir in 1982-1984
expand article infoA. Szczyglińska
Open Access
The work gives both; a qualitative composition of the trout′s feed for various body length classes and relations between feeding intensity and exposure to light within the twenty-four hours. Surveys were conducted on 1035 individuals caught between 1982 and 1984 within the Włocławski Reservoir. A composition of the trout′s feed, typical, in general, for particular body length classes, was lacking in macrophytes, with a small amount of Dreissena being replaced by the molluscs from Pisidium genus. A clear twenty-four hours feeding rhythm, with brake during the night, was noted. The thesis on the relation between the feeding intensity and water temperature has been confirmed.