Stichopus cf. horrens is an emergent culture species. It is known to be nocturnal and negatively phototactic; hence, determining its behavioral and growth responses to different light regimes is essential in optimizing culture protocols. This study examined the interactive effects of shading and relative food availability on the feeding pattern, absolute growth rates, and survival of juvenile S. cf. horrens. Six-month-old juveniles (4.27 to 19.41 g) were reared in replicate aquaria with three different shading treatments (covered, exposed, and half-covered aquaria) under ambient light conditions for 30 days. Juveniles in the exposed treatment with high microalgal biomass (13.44 ± 4.57 mg/g) had the highest growth rates (0.10 ± 0.05 g/day) but also the highest mortality (50%). In contrast, juveniles in the covered treatment had the lowest growth (−0.07 ± 0.03 g/day) but the highest survival (100%). Growth rates in the half-covered treatment were comparable with the exposed, and survival was higher than in the covered treatment. These indicate a trade-off between growth associated with more food and mortality risks due to light-induced stress. Juveniles in the half-covered treatment showed a significant preference to stay in the shaded portion whenever they were inactive during the day, suggesting avoidance to high light intensities (4726.51 ± 1582.43 Lux). Results of this study suggest that careful calibration of light intensities in nursery systems may help enhance juvenile growth. For indoor systems that may have limited space or surfaces for microalgal growth, cultured benthic diatom can be added to the partially covered tanks to increase the food available for the juveniles.

刺参比照。horrens是一种新兴的文化物种。众所周知，它是夜间活动和负趋光性的；因此，确定其对不同光照条件的行为和生长反应对于优化培养方案至关重要。本研究少年阴影和对饲养模式相对粮食供应，绝对增长率，和生存的互动效果S.比照 霍伦斯. 6 个月大的幼鱼（4.27 至 19.41 克）在重复的水族箱中饲养，在环境光照条件下进行 30 天的三种不同遮光处理（覆盖、暴露和半覆盖水族箱）。在高微藻生物量 (13.44 ± 4.57 mg/g) 暴露处理中的幼鱼生长率最高 (0.10 ± 0.05 g/天)，但死亡率也最高 (50%)。相比之下，覆盖治疗中的幼鱼生长最低（-0.07 ± 0.03 克/天），但存活率最高（100%）。半覆盖处理的生长率与暴露处理相当，存活率高于覆盖处理。这些表明在与更多食物相关的增长和由光引起的压力导致的死亡风险之间进行权衡。半覆盖处理的幼鱼在白天不活动时表现出明显的偏好留在阴影部分，这表明避免高光强度 (4726.51 ± 1582.43 勒克斯)。这项研究的结果表明，在苗圃系统中仔细校准光强度可能有助于促进幼鱼的生长。对于微藻生长空间或表面可能有限的室内系统，可以将养殖的底栖硅藻添加到部分覆盖的水箱中，以增加幼鱼可用的食物。