Author(s): Moumita Chakraborty, Basudev Mandal and Angsuman Chanda

Abstract: Chela atpar is an indigenous edible freshwater fish having high market demand because of it’s nutritive value, palatable taste, easily digestible etc. It has been noticed by several workers as well as fishermen also that the Chela fish population is declining rapidly; it may be due to some biological and environmental factors or anthropogenic activities and it has been categorized as lower risk to be threatened (IUCN, 2010). Present study reveals on the length-weight relationship of Chela atpar collected from freshwater Kangsabati river in two different seasons; i, e. one in winter (January to March, 2017) and another in monsoon (July to September 2017). Length of experimented fishes ranged from 6.8 cm to 14.47 cm and weight ranged from 2.24 gm to 17.48 gm in winter. In monsoon length ranged from 10.87 cm to 14.85 cm and weight ranged from 5.97 gm to 13.50 gm. To calculate length weight relationship Le Cren formula is used, W = a + L^b. ‘w’=Weight, ‘L’ = length, ‘a’ = constant, ‘b’ =an exponent. Length, weight data area converted into logarithmic form then graphically plotted. In both cases scattered diagram show linear relationship. In winter correlation coefficient value is significant at 0.01 level (2-tailed) and in monsoon it is at 0.05 level (2-tailed). Correlation result indicates that the relationship in winter is more significant than monsoon. Regression analysis show result or R² in winter is 0.872 and in monsoon is 0.0536.

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