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Research Article Open access CC BY 4.0

Skewed Sex Ratio Induced Imperilment of Himalayan Golden Mahseer Tor putitora: A Bottleneck for Captive Propagation

Atul K. Singh

Journal of Advances in Biology & Biotechnology · pp. 43–47 · Published 31 Dec 2022

10.9734/jabb/2022/v25i11-12608

Abstract

Getting sufficient number of female Tor putitora in wild or in captive conditions is a bottleneck for its sustainable management. In this study, presence of 84.62% male and 15.38% female in the riverine environment was observed while 85.25% male and 14.75% female were found in the lacustrine environment. There was 78.12% male and 21.88% female population in the hatchery produced siblings. Further, T. putitora fry (30 dpf) when treated with 17β estradiol (150 mg/kg feed) for 30 days resulted into production of 69.5% female while rearing it at 23 ±1 °C without any other treatment brought about 41.5% females. The skewed sex-ratio and low female populations of T. putitora has been understood to be an important factor for the imperilment of Himalayan golden mahseer and its propagation in captivity.

Golden mahseer sex ratio sex-reversal propagation sustainability

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