СОДЕРЖАНИЕ ЛИПИДНЫХ КОМПОНЕНТОВ У МОЛОДИ КУМЖИ SALMO TRUTTA L. ИЗ РЕКИ ОРЗЕГА (БАССЕЙН ОНЕЖСКОГО ОЗЕРА): II. ДИНАМИКА УРОВНЯ ЛИПИДОВ В МАЛЬКОВОМ ПЕРИОДЕ РАЗВИТИЯ
THE CONTENT OF LIPID COMPONENTS IN JUVENILES OF SALMO TRUTTA L. FROM THE ORZEGA RIVER (ONEGA LAKE BASIN): II. DYNAMICS OF THE LEVEL OF LIPIDS IN THE JUVENILE PERIOD OF DEVELOPMENT

Summary/Abstract: During the summer period, the lipid status in juveniles of brown trout (at 1+, 2+, 3+ years old) from the Orzega River (Onega Lake Basin) was studied. The high growth of the content of reserve lipids – TAG and ECHOL, and the increased level of cholesterol and indices of TAG/FL and TAG+ ECHOL/FL+CHOL in juveniles of brown trout at the age of 2+ and 3+ years old was registered. The obtained results indicate the increase in the intensity of food consumption and, consequently, the increase in the energy potential of the fish in focus. The positive correlation of the lipid content with the size and weight characteristics was registered. Thus, the weight of the studied youngsters at the age of 2+ and 3+ years old increased by 3,6 and 6,8 times when compared with correlations for juveniles at the age of 1+. The growth of the lipid levels in juveniles of brown trout (2+, 3+) is one of the biochemical indicators associated with changes in metabolic processes due to the influence of the growth and trophic and ecological factors. Such changes determine the level of adaptive possibilities of the growth and development in the studied fish. The results of the research on the lipid content in juveniles of brown trout can be considered biochemical indicators in monitoring the growth and early development of brown trout from the Orzega River.

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