International Journal of Pure and Applied Zoology
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In this study reproductive characteristics of the Greenback grey mullet, Liza subviridis from Parangipettai waters (Southeast coast of India) were examined; especially, the gonado somatic index (GSI), length at first sexual maturity (L50) and fecundity (volumetric method) were calculated. The gonadosomatic index (GSI) indicated that this species follows group-synchronous breeding pattern and spawns twice in a year. The peak spawning season of L. subviridis in Parangipettai waters was found to be February and March. The minimum length at first sexual maturity (L50) was found to be 131 mm and 145 mm for males and females respectively. With respect to sex ratio females were caught more in numbers than males throughout the study period. However the sex ratio analyzed month-wise indicated homogenous distribution during most of the months. The overall sex ratio (1:1.2) deviated significantly from the expected 1:1 ratio (X2 =10.97, P <0.005). The fecundity ranged from 1 to 7.9 lakhs oocytes. The relationship of fecundity with total length, body weight and gonad weight showed highly significant correlation. The average fecundity of the L. subviridis observed in the present study was 4.46 lakhs eggs. The implications from this study suggest that proper conservation of stock and substantial production for future is ensured for this species in Parangipettai waters.

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Author(s): M Ashiq Ur Rahman P Mohanchander P S Lyla and S Ajmal Khan


Mullets of India, Gonadosomatic index, Sex ratio, Fecundity, Reproduction., Animal Physiology, Cell and molecular biology, Genetics, Biochemistry, Biotechnology, Bioinformatics, Microbiology, Immunology, Parasitology

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