Crab fishery of t h e Calicut coast with some aspects of t he population characteristics of Portunus sanguinolentus, P. pelagicus and Charybdis cruciata

Sarada, P T (1998) Crab fishery of t h e Calicut coast with some aspects of t he population characteristics of Portunus sanguinolentus, P. pelagicus and Charybdis cruciata. Indian Journal of Fisheries, 45 (4). pp. 375-386.

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Abstract

Annual crab landings by mechanised trawlers ranged between 9.0 t (1988-'89) and 64.0 t (1987-'88). During 1987-'91 period. Portunus sanguinolentus (94.2 %), P. pelagicus (3.0 %) and Charybdis cruciata (2.8 %) were the dominant species. The carapace length-body weight relationship were : W = 0.01037 L^^"' for P. sanguinolentus, W = 0.00374 L = ^^'^ •' for P. pelagicus and W= 0.00059 L ^^^'•'' for C. cruciata. The carapace width-body weight relationships of the respective species were : W = 0.00013 L ''•^"^^ W = 0.00024 U™" and W = 0.00029 L ^ "'"*''. The carapace length-carapace width relationships were W = 19.636+1.7218 L for P. Sanguinolentus, W = 13.6133 + 1. 9549 L for P. pelagicus and W = 0.9874 + 1. 5473 L for C. Cruciata. The size varied from 26-175 mm carapace with (C W) in P. sanguinolentus, 66-115 mm C W in P. pelagicus and 51-120 mm C W in C cruciata. In P. sanguinolentus a regular pattern of dominance of one sex over the other was absent. Maturity study indicated spawning throughout the year and the size at first maturity in female was 82.99 mm C.W. The L , K (annual) and t^ (annual) values were 172.9 mm C.W., 1.4939 and -0.0482 respectively in male. The respective values in female were 161.8 mm C.W., 1.574 and -0.0635.

Item Type: Article
Uncontrolled Keywords: Crab fishery; Calicut; Portunus sanguinolentus; Portunus pelagicus; Charybdis cruciata
Subjects: Crustacean Fisheries > Crabs
Divisions: CMFRI-Cochin > Marine Capture > Crustacean Fisheries
Subject Areas > CMFRI Brochures > CMFRI-Cochin > Marine Capture > Crustacean Fisheries
Depositing User: Dr. V Mohan
Date Deposited: 17 Mar 2010 07:11
Last Modified: 09 Sep 2015 15:05
URI: http://eprints.cmfri.org.in/id/eprint/185

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