Author(s): Sohel Mian, Mohammad Amzad Hossain and Abdul Wahab Shah

Abstract: Sex ratio, fecundity and gonado somatic indices give important clue about any fish’s reproductive biology. The study was conducted to know the sex ratio, fecundity and gonado somatic index of spotted snakehead, Channa punctatus from a closed water body. Data on male-female ratio, fecundity and gonado somatic indices were calculated round the year. Fish samples were caught using the traditional cast nets from the earthen ponds. The female to male sex ratio for spotted snakehead in closed ecosystem found to be 1.16:1. Fecundity ranged from 2538±51 to 32987±111.52 and peak value was recorded in July. The highest mean gonado somatic index was 5.34±0.07 for female and 0.49±0.04 for male in July, showing that the gonadal development reached its peak during this month. Monthly pooled values of GSI indicated that the peak breeding season of C. punctatus occurred in the month of July in closed waterbody like earthen pond. The results of the present study revealed that C. punctatus breeding season starts from April and ends in September i.e., the rainy season in Bangladesh. The observation of the present study will be helpful for selective breeding programme, conservation and sustainable fishery management of C. punctatus in its natural waterbodies.

Pages: 360-363  |  1431 Views  206 Downloads

Download Full Article: Click Here