Nutritional and Biological Value of Broad Whitefish Coregonus Nasus (Pallas) of Indigirka Population in the Republic of Sakha (Yakutia)

Abstract

The article presents the results of studies of nutritional and biological value of broad whitefish (Coregonus nasus (Pallas) of Indigirka fish population. Whitefish (Coregonus nasus (Pallas)) is one of the main trade types. The annual catch of the whitefish is about 400 tons, including in the Indigirka river basin of 130 tons. The fish occupies not only rivers and lakes, but occurs sometimes and in saltish waters of the deltas of northern rivers of Yakutia. Fish products for peoples of the North take a leading place among other food and therefore are objects of careful studying. It is noted that fillet and belly flaps by the amount of protein are middle-protein products (10–15 %). So, the protein content in the fillets amounted to 14.74±0,003 %, in the belly flaps – to 12,88±0,030 %. By the fat content in belly flaps (22,94±0,033 %) the whitefish refers to a particularly fatty sorts of fish (over 15 %), by the content of protein and fat it refers to high-calorie foods (more than 200–300 kilocalories). It is established the content of a wide range of biologically active substances, including macroand microelements, fatty acids, amino acids and vitamins. The assessment of biological value of proteins on an amino-acid skore and assessment of biological efficiency of fatty acids according to the content of various fatty acids are given.