Three experiments were conducted to elucidate the most suitable rearing light intensity during the ontogenetic changes in white trevally (Pseudocaranx dentex) larvae. In Experiment 1, larvae were reared under 1000, 3000 or 9000 lx. At 10 days post hatching (dph), larval growth was significantly higher in the 1000 lx treatment than in the other treatments. In Experiment 2, larvae were reared under 30, 100, 300, 1000, 3000, and 9000 lx, and 300 lx was revealed to be the most suitable light intensity for larval growth and survival until 10 dph. However, light intensities higher than 1000 lx may promote larval growth after 10 dph when the larval retina has developed prior to the metamorphic stage. In Experiment 3, larvae were exposed to increasing light intensities (i.e. from 300 lx to 1000, 3000 and 9000 lx) from 10 to 18 dph. Our results indicated that the most suitable rearing light intensity was 300 lx during the first week of development and at the commencement of feeding, and between 1000 and 3000 lx when the larvae approached the metamorphic stage. The rearing light intensity should, therefore, be adapted throughout the ontogenetic development of white trevally to promote larval growth and production efficiency.

中文翻译：

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白鲹、Pseudocaranx dentex (Bloch and Schneider, 1801)、幼虫个体发育过程中的适宜光照强度

进行了三个实验来阐明白鲹（Pseudocaranx dentex）个体发育变化过程中最合适的饲养光照强度。) 幼虫。在实验 1 中，幼虫在 1000、3000 或 9000 lx 下饲养。在孵化后 10 天 (dph)，1000 lx 处理中的幼虫生长明显高于其他处理。在实验 2 中，幼虫在 30、100、300、1000、3000 和 9000 lx 下饲养，300 lx 被证明是最适合幼虫生长和存活的光照强度，直到 10 dph。然而，当幼虫视网膜在变质阶段之前发育时，高于 1000 lx 的光强度可能会在 10 dph 后促进幼虫生长。在实验 3 中，幼虫暴露于 10 到 18 dph 的增加的光强度（即从 300 lx 到 1000、3000 和 9000 lx）。我们的结果表明，在发育的第一周和开始进食时，最合适的饲养光照强度为 300 lx，当幼虫接近变质阶段时，在 1000 到 3000 lx 之间。因此，应在整个白鲟的个体发育发育过程中调整饲养光照强度，以促进幼虫的生长和生产效率。