Abstract—

Information on stock condition and reproductive biology are important for fisheries conservation and management planning. This study examined reproduction, growth, mortality and yield of sulphur goatfish (Upeneus sulphureus Cuvier 1829), which is a low-value food fish abundantly caught as bycatch in artisanal and industrial fishing from the southeast coast of Bangladesh at northern Bay of Bengal. Data were collected monthly obtaining samples from local fish landing center. The gonadosomatic index indicated that U. sulphureus spawns twice a year during January–May and August–October. Fecundity of the fish was positively correlated with the body and gonad weight, and varied from 15 128–97 274 eggs with fish weight 11.30–58.73 g. Monthly length–frequency distribution was analyzed through FISAT software, thus the estimated seasonalized von Bertalanffy growth parameters were L_∞ = 21.80 cm, K = 0.54 per year, C = 0.5, WP = 0.1 and Rn = 0.300, respectively. Moreover, the value of seasonalized total mortality coefficient Z (2.24) was smaller than that of the non-seasonalized Z (4.16). The instantaneous natural mortality and fishing mortality, calculated for non-seasonalized total mortality, were 1.31 and 2.86, respectively. Furthermore, the high exploitation rate (E = 0.69) was close to maximum exploitation level (E_max = 0.75) in yield-per-recruit analysis, suggesting that U. sulphureus is being exploited at the MSY (maximum sustainable yield) level. Therefore, further increase in fishing effort may reduce U. sulphureus stocks in the coastal waters of Bangladesh.

中文翻译：

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孟加拉国孟加拉湾北部Go鱼Upeneus sulfureus的繁殖，生长，死亡率和产量

摘要—

有关种群状况和生殖生物学的信息对于渔业保护和管理规划很重要。这项研究检查了硫山羊鱼（Upeneus sulfureus Cuvier 1829）的繁殖，生长，死亡率和产量，这是一种低价值食用鱼，大量从孟加拉国东南海岸孟加拉湾北部的手工和工业捕鱼中作为副渔获物被捕。每月收集数据，从当地鱼类登陆中心获取样本。促性腺激素指数表明硫脲每年一月至五月和八月至十月两次产卵。鱼的繁殖力与体重和性腺重量呈正相关，从15 128–97 274个卵到鱼的重量为11.30–58.73 g不等。每月长度频率分布通过FISAT软件分析，从而估计seasonalized贝塔朗菲生长参数是大号_∞ =21.80厘米，ķ = 0.54每年，Ç分别= 0.5，WP = 0.1和R n = 0.300。此外，季节性总死亡率系数Z的值 （2.24）小于非季节性Z的值（4.16）。以非季节性总死亡率计算的瞬时自然死亡率和捕捞死亡率分别为1.31和2.86。此外，按每招募产量分析，高开采率（E = 0.69）接近最大开采水平（E _max = 0.75），这表明正在以MSY（最大可持续产量）水平开采硫脲。因此，进一步增加捕捞努力可能会减少孟加拉国沿海水域中的硫脲类资源。