Study on the Length-weight Relationship of Four Common Edible Marine Fish Species from Shanghumugham and Valiyathura Beaches – Kerala, India

The present study was aimed to determine the length-weight relationship of fishes. The samples of fishes were collected from the catches of Shanghumugham and Valiyathura beaches during a period of one year from January to December 1991. The total length and weight of all the specimens were recorded to the nearest mm and mg respectively. The data were pooled and subjected to regression analysis, to determine the growth pattern of fishes. The length-weight relationship of Rastrelliger kanagurata revealed a linear relationship which can be represented as TW=3.2392 log TL-2.3777, the ‘b’ value of 3.2392. The linear relationships of Sardinella gibbosa revealed a regression equation of TW=1.47454 log TL-0.27006. Encrasicholina devisi also showed allometric growth rate, it has the ‘b’ value of 2.54733. The length-weight relationship of Nemipterus japonicas also reveals an allometric growth form. The ‘b’ value was found to be 1.56103. The linear relationship can be expressed as TW= 1.56103log TL-0.2365.