In this study, a 25-day experiment was performed to evaluate the survival and development of Portunus trituberculatus larvae under different light intensities (0, 61.55, 93.57, 124.31, 195.31, 248.51, and 310.95 μmol m⁻² s^-1). The newly hatched larvae were cultured in 1-L beakers at a density of 100 individuals/L, with four replicates per treatment. Full-spectrum light-emitting diode (LED) strip lamps were used as the light source. The larvae were fed with Artemia nauplii until all the larvae metamorphosed to young crabs or died, and survival and development of the larvae were recorded. The results showed that P. trituberculatus zoeae were not able to complete the entire larval cycle in the absence of light. In the dark treatment, the survival rate of the larvae decreased sharply in Z3 and reached 0.8 % in Z4, and all the larvae failed to develop to the megalopa stage. In the light treatment, no significant differences were observed in the survival rates of the Z1, Z2, and Z3 larvae under different light intensities (P > 0.05). However, the highest survival rates were detected for Z4 larvae and megalopae at 195.31 and 124.31 μmol m⁻² s^-1, respectively, indicating a decline in the light requirement. Although the Z2 and Z4 larvae were found to develop faster at a light intensity of 195.31 μmol m⁻² s^-1 (P < 0.05), no significant differences were found among the treatments at the end of the experiment (P> 0.05). In conclusion, the results show that P. trituberculatus needs more lighting than other crab species, and the light requirement declines as the zoeal and megalopal larvae develop into young crabs.

在这项研究中，进行了一个为期25天的实验，以评估三疣梭子蟹幼虫在不同光强度（0、61.55、93.57、124.31、195.31、248.51和310.95μmolm ^-2 s ^-1）下的存活和发育。将新孵化的幼虫在密度为100个/ L的1-L烧杯中培养，每次处理重复四次。全光谱发光二极管（LED）条形灯用作光源。幼虫用喂卤虫无节幼体，直到所有的幼虫变质为年轻的螃蟹或死亡，幼虫的生存和发展的记录。结果表明，P。trituberculatus在没有光照的情况下，zoeae无法完成整个幼虫周期。在黑暗处理中，幼虫的存活率在Z3中急剧下降，在Z4中达到0.8％，并且所有幼虫均未发育到半生不孕阶段。在光照下，在不同光照强度下，Z1，Z2和Z3幼虫的存活率没有显着差异（P > 0.05）。然而，在Z5.3幼虫和巨翅目中，存活率最高，分别为195.31和124.31μmolm ^-2 s ^-1，表明对光的需求量下降了。虽然发现Z2和Z4幼虫在光强度为195.31μmolm ^-2 s ^-1（P <0.05），实验结束时各处理之间无显着差异（P > 0.05）。总之，结果表明，三疣梭子蟹需要比其他蟹类更多照明和光需求下降的zoeal和megalopal幼虫发育成幼螃蟹。