Huanacuni Jordan I, Pepe-Victoriano Renzo, Presa Pablo, Espinoza-Ramos Luis A
Área de Biología Marina y Acuicultura, Facultad de Recursos Naturales Renovables, Universidad Arturo Prat, Arica 1000000, Chile.
Programa de Magister en Acuicultura: Mención en Cultivos de Recursos Hidrobiológicos y Mención en Acuiponía, Facultad de Recursos Naturales Renovables, Universidad Arturo Prat, Arica 1000000, Chile.
Animals (Basel). 2025 May 28;15(11):1579. doi: 10.3390/ani15111579.
The Peruvian grunt, , is a commercially valuable coastal fish in the southeastern Pacific that is facing overexploitation. To support its aquaculture development, this study evaluated the spontaneous reproductive dynamics of a captive broodstock held under natural photoperiod and temperature conditions in a flow-through system. Eleven wild adult specimens (3 females and 8 males) with an average size of 34.9 ± 5.4 cm and a weight of 986 ± 470 g were housed in a 9 m tank and monitored over five consecutive spawning seasons (2016-2021). Fish were fed a semi-moist, animal-protein-based diet (37% protein and 6.6% lipid) at 2% body weight/day. A total of 214 spontaneous spawning events produced over 83 million eggs. The highest reproductive output occurred in the first season (2016-2017) with 94 spawnings and 23.3 million eggs. Fertilization, hatching, and larval survival rates averaged 94.7%, 89.7%, and 75%, respectively, but declined in later years. Spawning showed marked seasonality from October to May, with a major reproductive pause in late January. The temperature (16-20 °C) and photoperiod (>12 h daylight) appeared to influence reproductive timing, alongside diet and broodstock handling. The findings reported herein are observational in nature and provide valuable baseline data for future experimental designs aimed at optimizing broodstock management in aquaculture.
秘鲁魣石首鱼是东南太平洋一种具有商业价值的沿海鱼类，正面临过度捕捞的问题。为了支持其水产养殖发展，本研究评估了在流水系统中，处于自然光照周期和温度条件下的 captive 亲鱼群体的自然繁殖动态。11 个野生成年样本（3 只雌性和 8 只雄性），平均体长为 34.9±5.4 厘米，体重为 986±470 克，被饲养在一个 9 立方米的水箱中，并在连续五个产卵季节（2016 - 2021 年）进行监测。鱼以体重 2%/天的量投喂一种半湿的、以动物蛋白为基础的饲料（37%蛋白质和 6.6%脂肪）。总共 214 次自然产卵事件产出了超过 8300 万个卵。最高繁殖产量出现在第一个季节（2016 - 2017 年），有 94 次产卵和 2330 万个卵。受精率、孵化率和幼体存活率平均分别为 94.7%、89.7%和 75%，但在随后几年有所下降。产卵表现出从 10 月到 5 月的明显季节性，在 1 月下旬有一个主要的繁殖暂停期。温度（16 - 20°C）和光照周期（>12 小时日照）似乎与饮食和亲鱼处理一起影响繁殖时间。本文所报告的研究结果本质上是观察性的，为未来旨在优化秘鲁魣石首鱼水产养殖中亲鱼管理的实验设计提供了有价值的基线数据。
