Growth and maturation of bignead carp under conditions of pond fish farming in Uzbekistan

摘要

Age and growth rate of bighead carp Hypophthalmichthys nobilis can be studied by scale analysis. Line regression between scale size and body length was determined. Females mature at age 4--5-years when they reach 70 cm in length. Diameter of eggs ovulated was measured as 1,4--1,98 (average 1/52) mm. Real fecundity is 700--1000 thousand eggs.