EFFECT OF FAT LEVEL IN DIETS ON PHYSIOLOGICAL STATE OF FISH
Journal Title: Вестник Астраханского государственного технического университета. Серия: Рыбное хозяйство - Year 2014, Vol 0, Issue 1
Abstract
The research work was carried out in salmon hatchery of Kamchatka Krai. The early fry of red salmon, passed to active feeding, were used as an object of investigation. Efficiency of use of Aller Performa diet with various content of fat (9 and 13 %) was investigated at cultivation of red salmon fry during 80 days. It was stated that the increased amount of fat in a diet promoted to increasing in fry growth rate by 10 % and to decreasing in fodder coefficient to 1.1 units. Fry, consuming compound feed from 13 % of fat, differed with higher protein content in a body. Hepa-tosomatic index was about normal rate – 1.84–2.3 %. However, this figure for red salmon fry, feed-ing by diets with low content of fat, was by 14 % less, than fish, breeded with high level of fat. The index of gastrointestinal tract of fry, feeding by low fat diet, was 7.5–8.1 %. The other group had higher index – 8.4 %. The high level of fat leaded to high intensity of erythropoiesis – 35.1 % of immature forms of erythrocytes. The fish, consuming the diet with low fat diet, had 28.3 % of immature forms of erythrocytes. It was stated that the increased content of fat in starting compound feed for red salmon, had no impact on fish behavioral reactions. All grown-up fishes had "the effect of domestication" that is characteristic for all salmon hatcheries of Russia and abroad.
Authors and Affiliations
Anna Bakhareva, Yulia Grozesku, Sergey Ponomarev, Mikhail Andreev, Maria Gorbunova
Keywords
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