Nocturnal orientation to reefs by late pelagic stage coral reef fishes
Nocturnal orientation to reefs by late pelagic stage coral reef fishes
复制标题
晚上层阶段珊瑚礁鱼类对珊瑚礁的夜间定位
作者：
I. Stobutzki;D. Bellwood
摘要利用野外行为笼研究了两个礁鱼科（天竺鲷科和雀鲷科）浮游晚期的夜间定向行为。 行为笼使鱼能够选择游向或远离珊瑚礁，以回应自然的线索。总体而言，55%的鱼显示在实验中的选择，但是，这两个家庭之间的比例不同，67%的pomacentrids和27%的apogonids显示选择。在这两个家庭中，显示出选择的鱼，鱼游向礁石的比例显着大于50%，随机运动将预测（64%的pomacentrids和67%的apogonids游向礁石）。这一比例没有显着差异的四个外地网站与不同的电流制度和地理位置。结果表明，后期浮游阶段的珊瑚鱼显示夜间定向行为，可能在响应声音，这可能有助于他们的解决珊瑚礁。
Abstract The nocturnal orientation behaviour of the late pelagic stages of two reef fish families (Apogonidae and Pomacentridae) was examined using behavioural cages deployed in the field. The behavioural cages enabled the fish to choose between swimming towards or away from the reef in response to natural cues. Overall, 55% of fish displayed a choice in the experiments, however, the proportion varied between the two families, with 67% of pomacentrids and 27% of apogonids displaying a choice. In both families, of the fish which displayed a choice, the proportion of fish swimming towards the reef was significantly greater than 50%, as random movement would predict (64% of pomacentrids and 67% of apogonids swam towards the reef). This proportion did not vary significantly among four field sites with different current regimes and geographic locations. The results suggest that the late pelagic stages of reef fish display nocturnal orientation behaviour, possibly in response to sound, which may aid in their settlement on reefs.