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Sex-ratio, maturation and spawning of the Indian ilisha, <i>ilisha melastoma</i> (clupeiformes: pristigasteridae) in coastal waters of Pakistan (northern Arabian Sea)

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Title Sex-ratio, maturation and spawning of the Indian ilisha, ilisha melastoma (clupeiformes: pristigasteridae) in coastal waters of Pakistan (northern Arabian Sea)
 
Creator Mahmood, Khalid
Ayub, Zarrien
Siddiqui, Ghazala
 
Subject Maturation
Spawning
Indian ilisha
Pakistan
 
Description 516-521
Present study showed that the over-all
sex-ratio deviated in favour of females in Ilisha melastoma. However, the
sex-ratio was approximately 1:1 in certain months while in others it was in
favor of females. Similarly the sex-ratio deviated from 1:1 ratio in different
size-classes. Minimum size at which
the specimens of I.
melastoma get matured is 14.9 cm in total length (11.5 cm in SL). Four
maturation stages of ovaries, namely, immature, ripening, ripe and
spent/recovering were recognized in I.
melastoma. Two peaks of
spawning were observed in this
species, the major peak was from February to May and the minor peak
appeared in August to November.
 
Date 2011-10-04T04:04:35Z
2011-10-04T04:04:35Z
2011-08
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/12764
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.40(4) [August 2011]