SOME ASPECTS OF BIOLOGY OF SNAKE HEAD Channa striatus

Abstract

Some biological aspects of Channa striatus viz., length-weight relationship, fecundity and condition factor were observed in the laboratory. Sample of 20 individuals of Channa striatus was collected randomly from local market in the Khulna city. The regression equation was found in case of total length and body weight, W = -416.46 + 23.19T (r2=0.896). The arithmetic regression equation of the relationship between the standard length and weight was, W = -382.05 + 26.0371 S (r2=0.908). The regression equation of the relationship between the total length and fecundity was, F = -16046 + 959.671 T (r2=0.859), standard length and fecundity was estimated as F = -14424 + 1070.25 S (r2=0.865) and body weight and fecundity as F = 3965.43 + 32.9612 W (r2=0.764). Among the different linear relationships, total length and body weight relationship was the strongest. Relationship between condition factor and fecundity was the weakest. The fecundity of the species was ranged from 4939 to 22723 and the mean fecundity of the 20 fishes was 14836.050 ± 4019.9612. Maximum fecundity was found in the fish having total length of 38 cm, body weight 475 g and minimum fecundity was found in the fish having total length of 26 cm, body weight 190 g. Condition factor of Channa striatus was found to vary from 0.68167 to 1.35073 with a standard deviation of 0.1748 and the mean value was 0.979 ± 0.1748.

Bioecology and Distribution of Dwarf Snakehead (Channa limbata, Cuvier 1831) Based on Geographic Information System in Progo River, Magelang, Central Java

“…The results of the calculation of the condition factor of C. limbata obtained a value of 0.6910701 in males while in females it was 0.7561971. The condition factor also reflects changes in food reserves so that it can be interpreted as the condition of fish in general (Datta et al, 2013;Islam et al, 2013).…”