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Observations on the biology of some sciaenid fishes from Mandapam region

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Relation http://eprints.cmfri.org.in/224/
 
Title Observations on the biology of some sciaenid fishes
from Mandapam region
 
Creator Jayasankar, P
 
Subject Fish biology
 
Description Regression coefficients in the length-weight relationships in females and males in Johneiops sina,
Johnius dussumieri and Johnius macropterus showed no significant difference and common equation is
recommended in each case. In Dendrophysa russelli, separate regression equations are necessary. Relative
condition factor seems to be affected by reproductive cycle. Spawning season of./, sina, J. dussumieri and
J. macropterus extended from March to October. D. russelli seems to spawn round the year. Length at first
maturity in J. sina, D. russelli, J. dussumieri and J. macropterus was 152,144,168 and 136 mm respectively.
Monthly sex ratio departed significantly from 1:1 only in J. sina, where there was male dominance.
 
Publisher CMFRI/ICAR
 
Date 1994
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/224/1/Article_07.pdf
Jayasankar, P (1994) Observations on the biology of some sciaenid fishes from Mandapam region. Indian Journal of Fisheries, 41 (2). pp. 80-86.