The study involved 3 predacious fish species from Lake Miedwie: zander (22 individuals examined), pike (85), and perch (316). The food composition, feeding intensity, food diversity, and size relationships between the predators and their prey were studied. The food of the predators studied consisted almost exclusively of fish; it was only the perch food that contained also the American crayfish (Orconectes limosus) and culicid pupae. The food was dominated by smelt, roach, perch, and unidentified fish. The largest fish were consumed by pike, the smallest being eaten by perch. The prey of the maximum and minimum relative length (as expressed in per cent predator length) were consumed by perch and zander, respectively.

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