Salmostoma bacaila known as Razorbelly minnow (Hamilton in 1822) is an indigenous fish species in Bangladesh. This study emphasizes on population structure, growth pattern (length-weight and length-length relations), growth considerations (asymptotic length, L_∞; weight, W_∞; growth coefficient, K; age at zero length, t₀), size and age at sexual maturity (L_m), growth performance index (φ), life-span (t_max), conditions factor (Allometric, K_A; Fulton’s, K_F and Relative, K_R), prey-predator status through relative weight (W_R), form factor (a_3.0), total (Z), natural (M) and fishing mortality (F), exploitation rate (E) and maximum sustainable yield (MSY) of S. bacaila in the Mahananda river, northwestern Bangladesh. Total 305 specimens of S. bacaila were hardly sampled (ranging between 5.5 to 11.9 cm total length (TL), and 1.05 – 9.20 g total body weight (BW)) through regular fishing gears during August 2016 – July 2017. The regression coefficient ‘b’ of length-weight relations specified negative allometric growth. Growth parameters (GP) were figured as L_∞ = 12.66 cm, K = 0.60 year^-1, W_∞ = 11.36 g, t₀ = 0.048, t_max = 5.00 year^-1 and φ’ = 1.98. The L_m was 7.34 cm in TL. Relative weight did not create any significant dissimilarity of 100 that would suggest a healthy habitat for S. bacaila. The a_3.0 was 0.0052 specifying that this fish could be described as elongated. In addition, the Z was calculated to be 1.57 year^-1. The M and F values obtained were 0.92 and 0.65 year^-1, respectively. The E was 0.41 and MSY (E_max) was estimated as 0.35 year^-1 by yield per recruitment model. Present research knowledge will be very useful in planning the sustainable and appropriate management of this species in Bangladesh and bordering countries.

中文翻译：

---

估计孟加拉国西北部马哈南达河（恒河支流）中缺乏数据的 Salmostoma bacaila (Hamilton 1822) 种群的种群参数

Salmostoma bacaila被称为 Razorbelly minnow（汉密尔顿于 1822 年）是孟加拉国的本土鱼类。本研究强调种群结构、生长模式（身长-体重和身长-长度关系）、生长考虑（渐近长度，L _∞；体重，W _∞；生长系数，K；零身长年龄，t ₀）、大小和年龄在性成熟（大号_米），生长性能指数（φ），寿命（吨_最大值），条件因子（异速，ķ_甲;富尔顿，ķ _˚F和相对，ķ _ř)，通过相对重量 ( W _R )、形状因子 ( a _3.0 )、总数 ( Z )、自然 ( M ) 和捕捞死亡率 ( F )、开发率 ( E ) 和最大可持续产量 (MSY) 的捕食者状态孟加拉国西北部马哈南达河中的S. bacaila。总305个的标本S. bacaila几乎不取样（5.5至11.9厘米总长度（TL），和1.05之间的范围内- 9.20克总体重（BW））2016八月期间通过定期渔具- 2017年七月的回归系数“乙'长度重量关系指定负异速生长。生长参数 (GP) 被计算为L _∞ = 12.66 cm，  K = 0.60 year ^-1，W _∞ = 11.36 g，t ₀ = 0.048，t _max = 5.00 year ^-1和 φ' = 1.98。的大号_米是7.34厘米在TL。相对重量没有产生任何显着的 100 差异，这表明S. bacaila是一个健康的栖息地。在一个_3.0是0.0052指定可以被描述这种鱼为细长的。此外，Z计算为 1.57 年^-1。获得的M和F值分别为 0.92 和 0.65 year ^-1。该Ë为0.41和MSY（ē_最大）估计为0.35年^-1每招聘模式的产量。目前的研究知识对于在孟加拉国和接壤国家规划该物种的可持续和适当管理非常有用。