NUTRITIONAL SPECTRA AND COMPONENTS OF FISH ON THE URAL RIVER

Materials of researches on food of fish semi-through passage in рекеЖайык are given in this article. It is shown that the collected material was carried out in the summer period at the expense of the scientific limit in accordance with the methodology for feeding the pike and bream. Biological indices of fish, frequency of occurrence of nutritional components and index of filling of fodder organisms in gastrointestinal tract are determined. Research conducted at the station located in the river. Zhayyk "Nizhny Tatar," "Yerkinkala," "Lower Dam," "Small Dam." A description of fodder objects for each species of studied fish is given. It was found that the nutrition of fish mainly depends on the state of the environment. The quality of nutrients varies from the age composition of fish. The nutritional activity of fish, normal living conditions of fish, water temperature and oxygen content have a significant effect. It is known that each species of fish feeds on certain food organisms. Depending on the type of nutrition and how it is caught or the nature of the nutrition, fish are divided into predatory and bentsoyed. The fish is eaten mainly by predators, and their species are sander, pike-inhabitants of freshwater reservoirs. The nutrition of "non-predatory" fish is divided into bentophages, planktophages and algae of plant origin. A representative of predatory fish is represented - a beetle and a bentofak bream.

R. Zhayik, bream, pike perch, length, mass, stomach, intestines

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