Biotechnics of artificial reproduction of East Siberian grayling (Thymallus arcticus pallasi) in expedition conditions on the Aldan River in Yakutia

Abstract

The article describes methods for obtaining and counting grayling eggs, its incubation, and growing the larva to a viable stage in expedition conditions. Recommendations are given on the choice of installation sites for incubators and cages. The working fecundity of grayling is 1500 pieces of eggs per female. The loading density of caviar is up to 40 thousand pieces / incubation unit. The incubation period is 27 days or 153 degree days. The density of planting larvae in cages for short-term maintenance for the period of rearing is 20 thousand pieces / m2. The period of rearing is 10 days.