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Journal of the Marine Biological Association of India
Fishery of the spinycheek grouper, Epinephelus diacanthus (Valenciennes), off Calicut along the Malabar Coast
Groupers constitute one of the important demersal resources off Malabar Coast. They contributed to 4 % of the trawl landings with an annual average catch of 2,727 t during 1992 to 2002. Their exploitation has registered a sharp increase with highest catch of over 5,000t in 1996 and 2002. The spiny-cheek grouper, Epinephelus diacanthus formed nearly 90% of the groupers landed. The length weight relationship of the species is Log W = - 4.03+2.8203 Log L (r = 0.9899). The fish attained a length of 244,372,439,474 and 492 mm at the completion of 1 to 5 years respectively. L∞ is 512 mm and K=0.65 y-1. The natural mortality (M) and fishing mortality (F) were found to be 1.16 y-1' and 1.75 y-1 respectively. The exploitation ratio (E) was higher than the Emax indicating greater fishing pressure on this species.
Groupers, spiny-cheek grouper, fishery, population parameters
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