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Fishery of sciaenids with some observations on the biology and stock assessment of Johnieops sina (Cuvier, 1830) exploited along the Malabar coast

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Relation http://eprints.cmfri.org.in/8706/
 
Title Fishery of sciaenids with some observations on the biology and stock assessment
of Johnieops sina (Cuvier, 1830) exploited along the Malabar coast
 
Creator Manojkumar, P P
 
Subject Stock Assessment
Fish and Fisheries
Sciaenids
 
Description Sciaenids form an important demersal finfish resource exploited off Malabar coast. They are caught
by trawls, gillnets and ringseines and are landed throughout the year. The average annual catch was
2452 t during 2001-2008. The landings fluctuated but showed a decline. Though several species
supported the sciaenid fishery, Johnieops sina was the dominant species contributing more than 58%
to the catch. In the fishery, the length of J. sina ranged from 62 to 229 mm. The length at first maturity
was 114 mm for males and 122 mm for females. The spawning period is prolonged with two peaks,
one in September-November and another in February-April. The male ā€“ female sex ratio was almost
equal in the catch. The length-weight relationship was estimated as W=0.000046658 L 2.8313. The
estimated asymptotic length (Lāˆž) and annual growth coefficient (K) of J. sina were 268 mm and 0.45,
respectively. The respective annual total, natural and fishing mortalities were 3.63, 1.10 and 2.31. The
spawning stock biomass is more than 30% of the stock at its unexploited level.
 
Publisher Marine Biological Association of India
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/8706/1/68--74--P._P._Manojkumar.pdf
Manojkumar, P P (2011) Fishery of sciaenids with some observations on the biology and stock assessment of Johnieops sina (Cuvier, 1830) exploited along the Malabar coast. Journal of the Marine Biological Association of India, 53 (1). pp. 68-74.