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Population dynamics of Nemipterus japonicus (Bloch) in the trawling grounds off Cochin

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Relation http://eprints.cmfri.org.in/2342/
 
Title Population dynamics of Nemipterus japonicus (Bloch)
in the trawling grounds off Cochin
 
Creator Joshi, K K
 
Subject Threadfin breams
Population Dynamics
 
Description Population dynamics of Nemipterus japonicus (Bloch), the dominant species of threadfin breams fished off Cochin was
studied during the period 2000-2002. N. japonicus was dominant during south-west monsoon and its spawning season
extended from May to November. The estimated VBGF parameters were Lá= 318 mm, K= 0.69 yr-1(males), and
Lá = 265 mm, K= 0.77 yr-1(females) indicating marked growth difference between the two sexes of N. japonicus. The study indicated that the present fishing effort along Cochin has reached an optimum level. The maximum yield in the present level of F can be obtained by increasing the length at first capture by 177 % of the present yield. The reduction in the cod-end mesh size unless stopped will lead to recruitment overfishing over a period of years.
 
Publisher CMFRI/ICAR
 
Date 2010
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2342/1/K._K._Joshi.pdf
Joshi, K K (2010) Population dynamics of Nemipterus japonicus (Bloch) in the trawling grounds off Cochin. Indian Journal of Fisheries, 57 (1). pp. 7-12.