Study of some biological characteristics Hemiculter leucisculus (Basilewsky, 1855) in Ala-gol wetland of Golestan province

In this study, some biological characteristics including sex ratio, gonadosomatic index, absolute and relative fecundity and egg diameter of H. leucisculus population in Ala-gol Wetland of Golestan province were investigated. Sampling was done in the summer of 1400 and 148 samples were caught with a net. The sex ratio of caught fish was equal to 1:1. The mean gonadosomatic index (GSI) for females was 10.72 ± 3.09 and for males it was 1.78 ± 0.70. The maximum total length and weight of females were 120 mm and 13.87 grams, respectively, and 127 mm and 13.48 grams for males. The minimum, maximum and average of absolute aggregation were calculated as 1334, 18340 and 7239.66, respectively, and for relative aggregation (eggs per kilogram of body weight) as 202, 1526 and 819.99, respectively. The average diameter of the eggs was 0.57 mm and varied from 0.46 to 0.66.