Macrobrachium macrobrachion is an African native brackish river prawn with a high commercial value. Currently, there is little information on the post-larval production of this species. Two experiments were conducted in the laboratory to develop production techniques for this species. The first experiment analyzed the duration of yolk resorption and the second described the larval stages. Yolk resorption was studied in 240 newly hatched larvae for 24 h based on the reduction in yolk area over time. For larval development stages, six breeding tanks containing 100 L with a density of 50 larvae/L were used. Larvae were fed a combination of Artemia nauplii, Brachionusplicatilis, and pelleted food (Larviva ProStart, Biomar Efico). The results have shown that the area of yolk reserves varied significantly in the hours after hatching. At 14 h after hatching, each larva resorbed approximately 85% of its yolk reserve, and at 18 h after hatching, each of them still had approximately 6.1%. Twelve larval stages were identified and described in three critical stages. M. macrobrachion larvae are lecithotrophic and need to start exogenous feeding at 14 h at the earliest and 18 h at the latest after hatching. These results are the first to highlight the potential for mass production of brackish river prawns.

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实验室条件下咸河虾沼虾的卵黄吸收和幼体发育：水产养殖的前景

沼虾是一种非洲本土的咸淡水虾，具有很高的商业价值。目前，有关该物种幼体后期生产的信息很少。为了开发该物种的生产技术，在实验室进行了两项实验。第一个实验分析了卵黄吸收的持续时间，第二个实验描述了幼虫阶段。根据卵黄面积随时间的减少情况，对 240 只刚孵化的幼虫的卵黄吸收进行了 24 小时的研究。对于幼虫发育阶段，使用了六个容量为 100 L、密度为 50 只幼虫/L 的繁殖池。将卤虫无节幼体、褶皱臂尾轮虫和颗粒饲料（Larviva ProStart、Biomar Efico）组合饲喂给幼虫。结果表明，卵黄储备面积在孵化后数小时内变化显着。孵化后 14 小时，每只幼虫吸收了大约 85% 的卵黄储备，孵化后 18 小时，每只幼虫仍吸收了大约 6.1%。在三个关键阶段中确定并描述了十二个幼虫阶段。巨臂虾幼虫为卵磷脂营养型，孵化后最早14小时、最晚18小时需要开始外源摄食。这些结果首次凸显了咸河虾大规模生产的潜力。