Successful conservation, management and aquaculture development of fishery stocks require life-history data, especially for fish that have commercial importance. The black pomfret, Parastromateus niger is one of the commercially important fish species in the Bay of Bengal (BoB) and reproductive biological data are scarce to date. Therefore, to understand the reproductive biology of P. niger, a total of 101 males and 80 females were collected and the gonadosomatic index (GSI), length at maturity (${\mathit{L}}_{\mathrm{m}}$), fecundity and gonadal development were studied throughout the year (March 2018 - February 2019). The highest levels of GSI were found from February-May with a second minor peak in October in both sexes. The ${\mathit{L}}_{\mathrm{m}}$ was calculated as 26.5 cm for males and 28 cm for females. The fecundity was found to vary from 114, 615 to 1, 227, 605 eggs with a mean value of 219, 433. The ovum diameter ranged from 28.32 ± 5.$28\mathrm{\mu }\mathrm{m}$ to 285.53 ± 35.$10\mathrm{\mu }\mathrm{m}$ with highest oocyte diameter in April when the fish reached full maturity, and the lowest in July (28.32 ± 5.28) when new eggs began their development for the next spawning season. The maximum numbers of eggs in the ovaries were found at the yolk granule stage in February-May and also in October, which indicates that the ovaries develop to a peak leading up to the spawning season. A number of mature spermatids were also seen in males in the respective months with females. From these detailed observations, it may be concluded that P. niger shows two spawning peaks: in February–May and in October. The present study will provide a baseline for management ecology, conservation and aquaculture development for this highly valued fish species.

渔业种群的成功养护，管理和水产养殖发展需要生活史数据，特别是对于具有商业重要性的鱼类。黑色po鱼，Parastromateus niger是孟加拉湾（BoB）的商业上重要的鱼类之一，到目前为止，生殖生物学数据还很少。因此，了解的生殖生物学P.曲霉，一共有101名男性和女性80收集和性腺指数（GSI），长度在到期日（${\mathit{大号}}_{\mathrm{米}}$），全年（2018年3月至2019年2月）对生殖力和性腺发育进行了研究。从2月到5月发现GSI最高水平，10月在两个性别中出现第二次轻微高峰。的${\mathit{大号}}_{\mathrm{米}}$男性为26.5厘米，女性为28厘米。发现卵泡的繁殖力从114、615到1,227、605个卵不等，平均值为219、433。卵子直径范围为28.32±5。$28\mathrm{\mu }\mathrm{米}$ 至285.53±35。$10\mathrm{\mu }\mathrm{米}$当卵完全成熟时，卵母细胞直径在4月最高，7月最低（28.32±5.28），当新卵在下一个产卵季节开始发育时。在2月至5月以及10月的卵黄颗粒期发现卵巢中卵的最大数量，这表明卵巢发展到产卵季节的高峰。在各个月中，男性中也见到许多成熟的精子细胞，女性中也见到。从这些详细的观察中，可以得出结论，尼日尔疟原虫显示出两个产卵高峰：2月至5月和10月。本研究将为这种高价值鱼类提供管理生态，保护和水产养殖发展的基准。