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Ultraviolet photosensitivity and feeding in larval and juvenile coral reef fishes

机译：紫外线敏感性和幼体和幼小的珊瑚礁鱼的摄食

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摘要

The ability of young coral reef fishes to feed using solely ultraviplet-A (UV-A) radiation during ontogeny was examined using natural prey in experimental tanks. Larvae and juveniles of three coral reef fish specles (Pomacentrus amboinensis, Premnas biaculeatus and Apogon compressus} are able to feed successfully using UV-A radiation alone during the later half of the pelagic larval phase. The minimum UV radiation intensities required for larval feeding occur in the field down to depths of 90-130 m in oceanic waters and 15-20 m in turbid inshore waters. There was no abrupt change in UV sensitivity after settlement, indicating that UV photosensitivity may continue to play a significant role in benthic juveniles on coral reefs. Tests of UV sensitivity in the field using light traps indicate that larval and juvenile stages of 16 coral reef fish families are able to detect and respond photopositively to UV wavelengths. These include representatives from families that are unlikely to pos- sess UV sensitivity as adults due to the UV transmission characteristics of the ocular media. Functional UV sensitivity may be more widespread in young coral reef fishes than in the adults, and may play a significant role in detecting zooplanktonic prey.
机译：在实验鱼缸中使用天然猎物检查了幼体珊瑚礁鱼在个体发育过程中仅使用超微藻A（UV-A）辐射进行摄食的能力。三种鱼类（Pomacentrus amboinensis，Premnas biaculeatus和Apogon compressus）的幼体和幼体能够在上层幼体后期的后半段单独使用UV-A辐射成功摄食，发生了摄食所需的最低UV辐射强度在海洋水域深至90-130 m处以及浑浊的近岸水域中15-20 m处的野外，沉降后UV敏感性没有突变，表明UV光敏性可能继续对底栖幼体起重要作用。使用光阱对野外的紫外线敏感性进行的测试表明，16个珊瑚礁鱼类科的幼体和幼体阶段能够检测并对紫外线波长做出光阳性反应，其中包括不太可能具有紫外线敏感性的科目中的代表。成年人由于眼介质的紫外线传播特性，对功能性紫外线的敏感性可能在年轻的珊瑚礁中更为普遍鱼类比成年鱼类更重要，并且可能在探测浮游动物猎物中起重要作用。

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