Comparison of hormonal stimulation influence on quality of sterlet (Acipenser ruthenus) and silver carp (Hypophthalmichthys molitrix) sperm.

The existing types of final gametes maturation hormonal stimulation and mechanism of its action were examined. The effect of fishes (sterlet, silver carp) different hormonal stimulation types on the quality and cryoresistance of its sperm was studied. It was found that there were no significant differences in motility between different types of hormonal stimulation for silver carp. The sterlet has significantly lower sperm quality after Nerestin stimulation. Stimulation of silver carp by mixture of Surfagon and Metoclopramide showed higher cell concentration in sperm than after stimulation by drug Ovopel or carp pituitary. It was higher for the starlet that stimulated by mixture Sufagon and Metoclopramide stimulation in comparison to Nerestin. The concentration had to influence on sperm quality.