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Estimates of mortality and yield per recruit of 'ghol' Pseudosciaena diacanthus (Lacepede)

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Relation http://eprints.cmfri.org.in/1825/
 
Title Estimates of mortality and yield per recruit of 'ghol'
Pseudosciaena diacanthus (Lacepede)
 
Creator Rao, K Venkatasubba
 
Subject Anchoves
 
Description The mortality rate and yield per recruit of 'ghol, Pseudosciaena diacanthus, are
estimated from the age composition of catches of the bull-trawlers of the New India
Fisheries Ltd., Bombay, for the years 1958 to 1961.
The annual mortality rate estimated from (1) catch per unit effort data and (2) the
average catch curve of 1958-'61 lies roughly between 0.55 and 0.60 and the instantaneous
mortality rate between 0.83 and 0.87. Since the fishery for 'ghol' was at the beginning
stage with only two pairs of bull-trawlers operating commercially, the estimated
total mortality rate (Z=0.83) is regarded as practically equal to natural mortality
rate (M).
The yield per recruit Yw/R for various lex els of fishing mortality (F) were calculated
with M=0.83 and the maximum value of Yw/R was found at a value of F=0.6, which
shows that the catch from the stock can be stepped up considerably over the present
level. Before deciding to step up the catches of 'ghol' by expanding the trawl fishery,
it is necessary to have estimates of fishing mortality generated by the.'dol' nets and
gill nets on this fish.
 
Publisher CMFRI/ICAR
 
Date 1968
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1825/1/Article_11.pdf
Rao, K Venkatasubba (1968) Estimates of mortality and yield per recruit of 'ghol' Pseudosciaena diacanthus (Lacepede). Indian Journal of Fisheries, 15 (1&2). pp. 88-98.