Abstract
The characteristic of the Sheatfish as a promising object of one of the representatives of the predatory ichthyofauna for pond carp farms is given. The natural food base of reservoirs for sheatfish in ontogenesis is given. Experimental work for more than twenty years at the "Flora" fish farm in the Volgograd region (the fifth fish breeding zone) has been carried out. The material for research are a fish varieties (from fingerlings to producers). The dynamics of hematological parameters growth in ontogenesis was studied. The connections and patterns of constitutional growth characteristics of males and females formation were revealed, the conformation indices correlated with productive qualities and indicators of vitality were determined. Based on the analysis of own materials and literature data, approximate criteria for assessing sexually mature producers of common sheatfish raised in pond conditions were drawn up. The experience of forming a broodstock herd and assessing the dynamics of weight, exterior characteristics, hematological indicators, obtaining full-fledged offspring allows us to recommend the common sheatfish for widespread introduction into pond polyculture.
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