Studies on seasonal variations in biological and anatomical aspects of fresh-water air-breathing fish Clariasbatrachus Linn

The present study was carried out to determine the morphological and anatomical character of fresh-water air-breathing fish Clariasbatrachus to characterized the length, weight of alimentary tract and reproductive aspects like condition factor (K), Gastrosomatic index (GSI), Gonadosomatic index (GnSI), Hepatosomatic index (HSI). The result obtained indicated adverse effects on the gonads as well as on liver weight. The average Gastrosomatic index (GSI), Gonadosomatic index (GnSI), Hepatosomatic index (HSI) and condition factor (K) in young and adult male and female sexes of Clariasbatrachus were 1.73 and 1.01, 1.70 and 1.70 (GSI) 0.37 and 0.32, 0.05 and 0.32 (GnSI) 0.62 and 0.43, 0.56 and 0.64, (HSI)2.42 and 2.80, 2.54 and 2.18 (K) respectively. The physico-chemical parameters of pond water during winter season showed. . PH 8.1 Alkalinity 66.0 mg/l Free CO2 9.5 mg/l Dissolved O2 6.5 mg/l Total Solid 114 mg/l Total hardness 60 mg/l Total suspended solid 4.0 mg/l Chlorides 10.6 mg/l The weight-length relationship, Gastrosomatic index, Gonadosomatic index, Hepatosomatic index and condition factor differed from four specimens.