International Journal of Fisheries and Aquatic Studies
2018, Vol. 6, Issue 5, Part D
Studies on Chagunius chagunio, Hamilton, 1822 (Cypriniformes: Cyprinidae) collected from Mayurakshi River, Siuri, Birbhum, West Bengal, India
Author(s): Arup Kumar Sinha, Pradip De and Somnath Bhakat
Abstract: The present report of
Chagunius chagunio confirms its distribution in the rivers of South Bengal. The species is diagnosed by overhanging bilobed snout, fleshy papillose lips, large eyes, horny tubercles around mouth, two pairs of barbels and strong, osseous, recurved dorsal spine.
Sexual dimorphism is distinct in which females are dominant/superior on the basis of caudal fin length, dorsal fin and spine length. Anal fin rays of mature males bear filament that is absent in females.
Overall growth of
C. chagunio is negatively allometric though males show slight positive allometric growth. The correlations in length-length relationship are highly significant. The difference of mean condition factor in between males and females reflects a picture of dominance of gravid females over the males of same length.
Multiple linear regression equation calculated on various lengths indicates best fit.
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How to cite this article:
Arup Kumar Sinha, Pradip De, Somnath Bhakat. Studies on Chagunius chagunio, Hamilton, 1822 (Cypriniformes: Cyprinidae) collected from Mayurakshi River, Siuri, Birbhum, West Bengal, India. Int J Fish Aquat Stud 2018;6(5):288-295.
