The influence of age males grass carp on their reproductive properties

The results of experience in the development of biotechnology of artificial breeding of grass carp in the conditions of Kabardino-Balkar republic, under the scheme of 5+, 6+, 7+, 8+, 9+ were given. The main criteria for a comprehensive assessment of grass carp producers’ absolute values were used: weight, body length, body index. Phenotypic study of populations of grass carp males showed statisti-cally significant heterogeneity among producers of quality sex cells. It was found out that the success-ful reception of sexual products was associated with phenotypic characteristics of producers, i.e. the degree of readiness of their reproductive sys-tem to the processes that have to go through as a result of gonadotropic preparation, its dosage and dose ratio in pre-injection and resolution. The num-ber of sperm produced by males varies throughout the spawning period. 12 mg when administered to male pituitary one dimensional group at the begin-ning and especially at the end of work, we prepared milt fewer than in the middle of this period. At the end of the work not only the amount of received soft roe decreased, but some males with the intro-duction of the pituitary did not manage to get soft roe and had greenish or yellowish liquid. Sperm concentration of the introduction of 3, 6, 9, 12 mg of pituitary fish with a normal body weight did not change. For in vitro fertilization of eggs with sperm was suitable evaluation 5 and 4, it was determined by the movement of nature. The analysis of our data indicated that with increasing age and size (weight and height) male grass carp with the intro-duction of a second, and so the same dose of the pituitary gland increased the amount of soft roe they produced. The studies of ecological and phys-iological characteristics of sperm showed that males, with rare exceptions, produced high-quality soft roe. Substandard sperm was diagnosed in consistency and color. This paper summarizes the experimental work and our observations on the as-sessment of the productive grass carp males of all ages, and on this basis by particularly breeding work at the plant reproduction technology of grass carp was characterized.