Gonadosomatic index and fecundity of threatened reba carp, Cirrhinus reba (Hamilton), in the Ganges River (northwest Bangladesh)

Abstract

The gonadosomatic index (GSI) and fecundity of the threatened Cirrhinus reba (Hamilton) was studied over a period of one year from January to December 2015 in the Ganges River (northwest Bangladesh). The GSI index indicated that the C. reba breeding season in the Ganges was from June to September with the peak in August. Fish fecundity increased with increasing fish length and weight, and the highest fecundity (265,042.23) was recorded in a fish with a total length, a body weight, and an ovary weight of 23.80 cm, 136.00 g and 45.00 g, respectively. There was a linear relationship between fecundity and total length (r = 0.871), body weight (r = 0.872), and ovary weight (r = 0.879), with that between ovary weight and fecundity being the strongest.

Sexual dimorphism and reproductive biology of bronze featherback (Notopterus notopterus, Pallas 1769) from Kelekar River, Ogan Ilir, South Sumatra, Indonesia

“…Some aspects of N. notopterus reproductive biology observed in this study are presented in Table 2. The GSI utilized to ascertain the fish's reproductive periodicity 43 . Table 2 shows that the GSI value of female fish was highest in February, and the male fish was highest in March.…”