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Biometry analysis, length-weight relationship and sexual dimorphism of the Spotted Scat, Scatophagus argus (Linnaeus, 1766) (Perciformes: Scatophagidae) from Gulf of Mannar, southeast coast of India

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Title Biometry analysis, length-weight
relationship and sexual dimorphism
of the Spotted Scat, Scatophagus
argus (Linnaeus, 1766) (Perciformes:
Scatophagidae) from Gulf of Mannar,
southeast coast of India
 
Creator Gandhi, V
Venkatesan, V
Zacharia, P U
 
Subject Fishery biology
 
Description A total of 1,659 specimens of spotted scat were collected from
commercial landings in Mandapam along Gulf of Mannar for
studying biometry, length-weight relationship and sexual
dimorphism. Biometry was carried out to analyse the growth
rate of body parts in relation to the standard length. Fourteen
morphometric characteristics were examined. The study revealed
that the fastest growth rate was in depth of the body followed
by pre-dorsal and pre-anal length and lowest in the eye
diameter. The length-weight relationship was also carried out
for 1,141 females ranging in TL from 140 - 340 mm and 518
males in the range of 50 - 117 mm. The equation of W =
0.005373 L2.842 and W = 0.002152 L2.479were derived for male
and female respectively. The relationship revealed that the value
of exponent ‘’b’’ was considerably below 3, which might be due
to the deep, strongly compressed body. Analysis of covariance
revealed that there were significant differences (P< 0.01)
between sexes. Male and female spotted scat could be
differentiated by head shape and colour of body. Females were
larger and heavier than males of the same length group.
 
Publisher Marine Biological Association of India
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/9570/1/Article-2.pdf
Gandhi, V and Venkatesan, V and Zacharia, P U (2013) Biometry analysis, length-weight relationship and sexual dimorphism of the Spotted Scat, Scatophagus argus (Linnaeus, 1766) (Perciformes: Scatophagidae) from Gulf of Mannar, southeast coast of India. Journal of the Marine Biological Association of India, 55 (1). pp. 12-16.