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.
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Abstract
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Fishery; Growth; Nemipterus japonicus; Population dynamics; Spawning |
| Subjects: | Demersal Fisheries > Threadfin breams Marine Fisheries > Population Dynamics |
| Divisions: | CMFRI-Kochi > Marine Capture > Demersal Fisheries Division Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Demersal Fisheries Division CMFRI-Kochi > Marine Capture > Demersal Fisheries Division Subject Area > CMFRI-Kochi > Marine Capture > Demersal Fisheries Division |
| Depositing User: | Dr. V Mohan |
| Date Deposited: | 11 Aug 2010 06:06 |
| Last Modified: | 09 Sep 2015 15:16 |
| URI: | http://eprints.cmfri.org.in/id/eprint/2342 |
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