Comparative assessment of carp crosses by biochemical parameters

The main goal of hybridization in the field of aquaculture is to improve the commercial qualities and increase the productivity of hybrids in comparison with the parent forms. This improvement in performance occurs due to the achieved effect of heterosis, that is, due to the inheritance of a certain set of alleles of various genes from their dissimilar parents. Heterosis is achieved by selecting males and females of different origins, thus avoiding the negative impact of the opposite effect – inbreeding depression. The results of a comparative assessment of a new three-breed carp cross with other crosses are presented, including production indicators – indices that allow one to judge the linear changes in fish during its development. It has been shown that the runnability index of the new three-breed cross is significantly lower than that of the “Sursky Malokostny” and “Petrovsky” crosses, which allows us to conclude that it has high commercial qualities. The results of the commercial assessment of fish are presented and conclusions are drawn about the value of its nutritional qualities are described. In terms of size and weight indicators, two-year-olds of the new three-breed cross are superior to other crosses, which indicates significant production potential. All recorded blood parameters of the studied fish were within physiological norms. The increased vitality indicates good resistance of the new three-breed cross-hybrid. The analysis of biochemical blood parameters allows us to draw conclusions about the high intensity of protein metabolism of the “Sursky malokostny” and the new three-breed crosses, judging by the activity of ALT and the content of total protein.