The current study focuses on the detailed data on stock assessments including population structure, growth parameters, mortality, recruitment pattern, exploitation rate (, maximum sustainable yield (MSY) and relative yield per-recruit of (Hamilton, 1822) based on 2512 specimens through regular monthly sampling using gill net, cast net, and square lift net in the Kaptai Lake, located in the hilly region of Bangladesh during January to December 2017. Total length (TL) and body weight (BW) were measured using digital slide calipers and electronic balance with 0.01 cm and 0.01g accuracy for each individual. The asymptotic length () was 44.40 cm and growth coefficient () was 0.70 year. The growth performance index () was 3.14. The age at zero length () was 0.027 year and life-span () was 2.73 year. We estimated total mortality (), natural mortality () and fishing mortality () as 4.23, 1.27 and 2.96 year, respectively. The recruitment pattern was throughout the year with two pick-events during May and September. Length at first capture () was 20.65 cm TL. The was 0.70 where the (exploitation rate producing maximum yield) was 0.45 which indicates 25% over fishing. The MSY was estimated as 34257 metric ton. In conclusion, the results of this study would be very operative to execute specific management for in Kaptai Lake, Hilly region of Bangladesh.

中文翻译：

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基于长度的孟加拉国卡普泰湖种群评估模型评估主要鲶鱼Eutropiichthys vacha的开发状况


目前的研究重点是种群评估的详细数据，包括基于 2512 个样本的种群结构、生长参数、死亡率、招募模式、开发率（最大可持续产量（MSY）和每次招募的相对产量（Hamilton，1822）） 2017 年 1 月至 12 月，每月定期在孟加拉国丘陵地区的卡普泰湖使用刺网、抛网和方形提升网进行采样。使用数字游标卡尺测量总长度 (TL) 和体重 (BW)。每个个体的渐近长度()为0.01厘米和0.01克，生长系数()为0.70岁，零长度年龄()为0.027岁。寿命 () 为 2.73 年，我们估计总死亡率 ()、自然死亡率 () 和捕捞死亡率 () 分别为 4.23、1.27 和 2.96 年。九月。第一次捕获时的长度 () 为 20.65 cm TL。值为 0.70，其中（产生最大产量的开发率）为 0.45，表示过度捕捞 25%。 MSY 估计为 34257 吨。总之，本研究结果对于孟加拉国丘陵地区卡普泰湖的具体管理具有非常可操作性。