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Theoretical yield studies on the large-scaled tongue sole, Cynoglossus macrolepidotus (Bleeker), from the Arabian sea

DRS at CSIR-National Institute of Oceanography

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Title Theoretical yield studies on the large-scaled tongue sole, Cynoglossus macrolepidotus (Bleeker), from the Arabian sea
 
Creator Kutty, M.K.
Qasim, S.Z.
 
Subject Population Studies
growth
exploitation
fishing mortality
yield
marine fish
Cynoglossus macrolepidotus
ISW, Arabian Sea
 
Description Theoretical yield values of Cynoglossus macrolepidotus were computed from a simple Beverton and Holt type model using informations on growth and mortality rates The effects of various fishing mortality rates (F) and ages of exploitation (Tp) on yield were considered at three different natural mortality rates, M=0.4, 0.5 and 0.6, since the calculated natural mortality was found to range from 0.4 to 0.575 The conclusion drawn from the simple model is that the population is at present underfished and considerable increase in the yield is possible by increasing the fishing intensity The yield values clearly indicate that when M=0.4, fish of 2 years and older may be fished at F greater than 0.5; when M=0.5, fish older than 1 year may be fished at F less than 1.15 and when M=0.6 fish of 1 year and older may be fished up to F=1.8 A precise estimate, however, of a Tp' required to give the maximum yield for a given F can be determined from the eumetric fishing curve The yield of Cynoglossus macrolepidotus has been found to be low in relation to the fishing intensity This may be because of high M and low W infinity The optimum age of exploitation is also low in this fish probably because the growth is largely confined to the first few years and M is high
 
Date 1993-12-04T09:56:26Z
2017-09-29T13:47:25Z
1993-12-04T09:56:26Z
2017-09-29T13:47:25Z
1968
 
Type Journal Article
 
Identifier Proceedings of the National Institute of Science of India, vol.38; 1968; 864-875
http://drs.nio.org/drs/handle/2264/5992
 
Language en
 
Relation P Natl Inst Sci India
SCI
 
Publisher National Academy of Sciences, India