SOME INFORMATION ABOUT THE DEVELOPMENT OF WHITE AND CHIPOR FISH IN ARTIFICIAL WATER RESERVOIRS OF SAMARKAND REGION
Keywords:Silver carp, bighead carp, temperature, embryo, blastula
The study examined the embryonic development of silver carp
(Hypophthalmichthys molitrix) and bighead carp (Hypophthalmichthys
nobilis Richardson, 1845),  which came to Uzbekistan from
reservoirs in China in the early 1960s. More than 10 genera of this
species have been studied locally. Embryonic development continues
normally. At a water temperature of 21-23 ° C, embryos appear after 32
hours, larvae undergo mixed feeding - after 4 days, exogenous feeding -
after 5 days. Piglets reach sexual maturity at the age of 5-7 years and
are fertilized in the summer. The female lays about 490-540 thousand
pelagic eggs. Fertilization takes place in May-June at a water
temperature of 18-20 ° C.
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