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Determination of length-weight relationship of squid (Loligo duvauceli) found along Pakistan coast

Common squid (Loligo duvauceli) is caught as by-catch of shrimp trawlers in 
shallow coastal. waters off Pakistan. Size frequency data of squid for sexes combined collected from Karachi Fish Harbour were analyzed. The length-weight relationship of the form W = a.L b was determined and to mean length of squid sample measured compared with mean length derived from inverse equation was tested for any significant differences, none were observed and it was 
inferred that the equation W = 0.243xL 2.2424 describe the relationship.