Increased ultraviolet radiation (UVR) is a major environmental stressor for marine organisms. The response of planktotrophic larvae of holo- and meroplanktonic crustaceans fed dietary algae grown under different light regimes and contents of UV-absorbing compounds (UACs), was experimentally evaluated. Paracalanus parvus copepodites and Cyrtograpsus angulatus zoeae were fed diatoms grown under two radiation treatments: PAR (400–700 nm, produced by 40 W cool-white fluorescent bulbs) and PAR + UVR (280–700 nm; adding Q-Pannel UV-A-340 lamps to PAR fluorescent bulbs). An absorption peak at 337 nm (UVR range) was observed only for larvae fed UVR-irradiated diatoms. After 144 h of ad libitum feeding, larvae were exposed to UVR for 24 h. Mortality rates were ~80% in individuals fed PAR-reared microalgae, and ~10% for those fed UV-irradiated microalgae. Results point to the importance of UACs conferring some tolerance to planktotrophic larvae under increased environmental UVR stress. Yet, acquired tolerance is differential among larvae, with implications for zooplankton ecology.

增加的紫外线辐射 (UVR) 是海洋生物的主要环境压力源。通过实验评估了在不同光照条件和紫外线吸收化合物 (UAC) 含量下生长的全浮游和小型浮游甲壳类动物的浮游营养幼虫的反应。Paracalanus parvuscoppodites和Cyrtograpsus angulatus zoeae 被喂食在两种辐射处理下生长的硅藻：PAR（400-700 nm，由 40 W 冷白荧光灯泡产生）和 PAR + UVR（280-700 nm；添加 Q-Panel UV-A -340 灯到 PAR 荧光灯泡）。在 337 nm (UVR 范围) 处的吸收峰只观察到幼虫喂养 UVR 辐照的硅藻。随意144 小时后取食后，幼虫暴露在紫外线下 24 小时。喂食 PAR 饲养的微藻的个体死亡率约为 80%，喂食紫外线照射微藻的个体死亡率约为 10%。结果表明 UAC 在增加环境 UVR 压力下赋予对浮游生物幼虫一些耐受性的重要性。然而，幼虫之间获得的耐受性是不同的，这对浮游动物生态学有影响。