Yellowstripe goatfish, Mulloidichthys flavolineatus, is a widely distributed commercial fish in the Indo-Pacific. However, there have been few comprehensive studies on its life history, which is important for resource management. In this study, we examined age, growth, sexual maturity, and spawning season of M. flavolineatus near Okinawa Island, southern Japan, based on sectioned otolith and gonadal histology. These fish have short life spans, with a maximum age of 5 + years and reach maturation within the first year of life. Monthly changes in the appearance of an opaque edge indicate annual production of otolith bands. This fish shows sexual size dimorphism due to the faster growth of females compared to males. The von Bertalanffy growth functions were L_t = 31.5{1-exp[-0.61(t + 0.44)]} for females and L_t = 24.8{1-exp[-0.75(t + 0.48)]} for males. Observed fork lengths at 50% maturity were 17.0 cm for female and 14.5 cm for male. The spawning season occurs from May to September, and the peak is from May to July. Histological observations and fish market surveys indicate that the peak spawning and catching seasons overlap substantially. The development pattern of oocytes in the Okinawan fish showed group synchronous spawning, which indicates a different spawning strategy than that of this species with genetic continuity in other regions.

Yellowstripe goatfish，Mulloidichthys flavolineatus，是一种广泛分布于印度洋-太平洋的商业鱼类。然而，对其生活史的综合研究很少，这对资源管理很重要。在这项研究中，我们根据耳石切片和性腺组织学检查了日本南部冲绳岛附近的M. flavolineatus 的年龄、生长、性成熟和产卵季节。这些鱼的寿命很短，最大年龄为 5 岁以上，并在生命的第一年内成熟。不透明边缘外观的每月变化表明耳石带的年产量。由于雌性比雄性生长更快，这种鱼表现出性别大小的二态性。von Bertalanffy 增长函数为L _t = 31.5{1-exp[-0.61( t  + 0.44)]} 女性，L _t  = 24.8{1-exp[-0.75( t  + 0.48)]} 男性。在 50% 成熟度时观察到的叉长为女性 17.0 厘米，男性为 14.5 厘米。产卵期为5-9月，高峰期为5-7月。组织学观察和鱼市调查表明，产卵高峰期和捕捞季节有很大的重叠。冲绳鱼的卵母细胞发育模式呈群同步产卵，表明与其他地区具有遗传连续性的该鱼不同的产卵策略。