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Fishery, mortality rates and yield per recruit of Ribbonfish Trichiurus lepturus Linnaeus

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Relation http://eprints.cmfri.org.in/477/
 
Title Fishery, mortality rates and yield per recruit of
Ribbonfish Trichiurus lepturus Linnaeus
 
Creator Narasimham, K A
 
Subject Demersal Fisheries
 
Description The months of abundance for Trichiurus lepturus, forming 61.2 to 95.3%
of the ribbonfish catches, are October to December with minor peaks in April-May
and July-August. Majority of the fish caught belonged to the 'O' age group and
fish older than 3 years are scarce in the commercial catches.
Based on the data for 1967-71, the instantaneous total mortality coefficient,
Z, was estimated at 1.2 from the average catch curve with boatseine as standard
gear. Instantaneous coefficient of natural mortality, M, was estimated as 0.9. The
yieW-in-weight-per-recruit values werie computed at various levels of fishing mortality
rates and ages of exploitation by tiie simple Beverton and Holt model, as
modified by Jones, at three different levels of natural mortality rates, M = 0.7,
0.9 and 1.1. This study clearly showed that even at the young age of exploitation
(Tpl = 0.3 years) the ribbonfish population is underfished and there is considerable
scope to increase the yield by stepping up the fishing effort.
 
Publisher CMFRI/ICAR
 
Date 1983
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/477/1/Article_12.pdf
Narasimham, K A (1983) Fishery, mortality rates and yield per recruit of Ribbonfish Trichiurus lepturus Linnaeus. Indian Journal of Fisheries, 30 (1). pp. 99-109.