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    The effect of the method of supplementary feed application on the feeding habits of carp (Cyprinus carpio L.) with regard to natural food in ponds

    Qualitative and quantitative analyses were carried out on the intestinal content of 408 carps of age 0 + collected from ponds manured with liquid cowshed manure, with or without the addition of supplementary f...

    P. Spataru, B. Hepher, A. Halevy in Hydrobiologia (1980)