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Size Composition, Exploitation Structure and Sex Ratio of Clupisoma garua (Hamilton) from Middle Stretch of the Ganga River at Allahabad, India
National Academy Science Letters ( IF 1.2 ) Pub Date : 2020-10-16 , DOI: 10.1007/s40009-020-01011-0
A. Gopesh , Sarita Tripathi , K. D. Joshi , A. C. Dwivedi

Clupisoma garua is a medium-sized freshwater catfish with very high market value in Indian sub-continent. Besides immense food value, the fish is also known as a game fish. The fish samples for this study were randomly collected from middle stretch of the river Ganga at Allahabad during July 2014–June 2015. The size composition of the samples varied from 135 to 446 mm. The maximum exploitation was observed in 171–210 mm size group (29.04%), while minimum in 411–450 mm (0.83%) in stock samples. In general, lower size groups were highly exploited compared to middle and higher size groups. Male population dominates over females in 211–250, 251–290 and 331–370 mm size groups, in contrary, female was dominant in size groups from 131–170, 171–210 and 291–330 mm.



中文翻译:

印度安拉阿巴德恒河中游段加里氏梭状芽胞(汉密尔顿)的大小组成,开发结构和性别比

Clupisoma garua是中型淡水cat鱼,在印度次大陆具有很高的市场价值。除了巨大的食物价值外,鱼还被称为野味鱼。2014年7月至2015年6月,从阿拉哈巴德的恒河中段随机采集了用于本研究的鱼样品。样品的大小组成从135毫米到446毫米不等。在种群样本中,在171–210 mm尺寸组中发现最大开采量(29.04%),而在411–450 mm尺寸组中观察到最小开采量。通常,与中等和较高规模的群体相比,较低规模的群体被高度开发。在211-250、251-290和331-370毫米大小组中,男性占多数,而女性在131-170、171-210和291-330毫米大小组中占主导地位。

更新日期:2020-10-17
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