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

Md. Abu Sayed Jewel; Md. Ayenuddin Haque; Mst. Shahanaj Ferdous; Mst. Samsad Khatun; Dil Afroza Khanom; Jakia Hasan

doi:10.2478/aopf-2019-0009

Md. Abu Sayed Jewel
Md. Ayenuddin Haque
Mst. Shahanaj Ferdous
Mst. Samsad Khatun
Dil Afroza Khanom
Jakia Hasan

DOI: https://doi.org/10.2478/aopf-2019-0009

Keywords: Cirrhinus reba, fecundity, GSI, Ganges River

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.