Effectiveness evaluation of the infl uence of protein concentrates on the chemical composition of fish meat

Abstract

Due to the high demand, cost, growing shortage and low quality of fi sh-meal, there is a constant search for affordable alternative feed raw materials in feeding aquaculture fi shing grounds. The use of high-protein products of plant origin is the most effective option for replacing fi sh-meal in fi sh feed. The purpose of the work was to evaluate the eff ectiveness of the infl uence of protein concentrates on the chemical composition of rainbow trout meat. Testing of compound feed for rainbow trout, the formulation of which included high-protein feed concentrates, was carried out on the basis of IP Kalmykova I. O. and under the conditions of the Research Center “Breeding valuable sturgeon breeds” at the Volgograd State Agrarian University. It was found on base of the results obtained that more intensive growth was observed in the groups in which the mustard protein-containing feed concentrate Gorlinka was introduced into the feed formulation with partial or complete replacement of sunfl ower meal. Here, the increase in the total and average daily live weight gain was noted by 2,83–6,93 % and by 1,62–1,68 %. The use of the Agro-Matic concentrate during the period of the experiment had a positive eff ect on the growth dynamics of rainbow trout, increasing productivity indicators. Thus, live weight indicators increased by 1,29–4,15 %, daily gain indicators increased by 1,44–4,46 % relative to individuals receiving compound feed with fi sh-meal. When studying the chemical composition of trout meat with the addition of Gorlinka concentrate to the feed formulation in the experimental groups, the increase in protein content was revealed by 0,13–0,41 abs.%, inorganic matter by 0,04–0,12 abs.%, also the total amount of amino acids increased by 0,18–0,46 abs.%, while the fat content on the contrary decreased by 0,05–0,17 abs.% compared to the control. In the experimental trout groups, when introducing the Agro-Matic protein concentrate into the diet instead of fi shmeal the protein content increased by 0,03–0,40 abs.%, inorganic matter by 0,08–0,24 abs.%, total amino acids increased by 0,11–0,58 abs.%, there was a slight decrease in the amount of fat by 0,10–0,36 abs.% compared to the 1st control group. The use of protein concentrates has a positive eff ect on the qualitative composition of the muscle tissue of rainbow trout by increasing the protein content and the amount of essential amino acids in the muscle tissue of individuals surpassing the 1st control group in key indicators.