Comparative assessment of reproductive function domestitsirovannykh females of the Russian sturgeon
Scales of artificial reproduction of sturgeon fishes considerably decrease in recent years in connection with the increasing deficiency of their producers. Formation of productional herds of sturgeon fishes by method of a domestikation allows to provide with guarantee in short terms fish-breeding processes by qualitative females and males. The biotechnics of creation of uterine herds sturgeon industrially, involvement in fish-breeding process of the producers who ripened out of environment - the new, low-studied direction in sturgeon breeding, represents a great interest for fish breeders and demands detailed studying. The task - to study the main reproductive qualities the domestitsirovannykh of females of the Russian sturgeon depending on terms of repeated maturing was set. Researches were conducted in 2011-2012 on the basis of Sergiyevsky sturgeon fish-breeding artificial reproduction plant. The productional herd of the Russian sturgeon created by a domestikation method contained in ponds of plant and was fed with pastelike sterns during the feeding period, in the fall the herd changed in zimovala. In the spring after a bonitirovka of herd the ripened individuals at whom quality of sexual products was estimated were selected, and went for use in the fish-breeding purposes. Caviar from females was received prizhiznenno, by an operational method taking from a body of fish. The taken caviar was placed in a basin and inseminated on usual technology, adding the sperm divorced water at the rate on 2 kg of caviar of 50 ml of sperm. Time of fertilization made 5 min. Otmyvka of caviar was carried out by solution of river silt within 45 min. The impregnated calves was stuffed up in the devices "Sturgeon" for an incubation. In work results of researches of reproductive features of the females of the Russian sturgeon containing in herds are presented. Reproductive function of the Russian sturgeon was estimated on such indicators as: the mass of a female, mass of the received caviar, caviar exit percent, quantity of oocytes in 1 g, number of all caviar, fertilization percent, absolute and relative fertility. Dependence of the main reproductive indicators of fishes on terms of repeated maturing is revealed. It is shown that the females of the Russian sturgeon containing in controlled conditions have high reproductive functions and can be successfully used for artificial reproduction.