Diurnal lighting patterns and habitat alter opsin expression and colour preferences in a killifish
Diurnal lighting patterns and habitat alter opsin expression and colour preferences in a killifish
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昼夜照明模式和栖息地改变鳉鱼的视蛋白表达和颜色偏好
DOI：
10.1098/rspb.2013.0796
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Fuller, R. C.
中科院分区：
文献类型：
--
作者：
Johnson, A. M.;Stanis, S.;Fuller, R. C.
照明环境的空间变化经常导致颜色模式、颜色偏好和视觉系统的群体变化。然而，光照条件也每天变化，视觉系统和行为的许多方面在这个时间尺度上都有变化。在这里，我们使用的蓝鳍金枪鱼（Lucania goodei）比较昼夜变化和栖息地的变化（明确与单宁染色的水）如何影响视蛋白的表达和偏好啄不同颜色的物体。视蛋白表达通常在午夜和黎明最低，在中午和黄昏最高，这种昼夜变化比栖息地之间的变化大很多倍。啄食偏好受昼夜和栖息地的变化，但没有相关的视蛋白表达。相反，啄食偏好匹配的照明条件，与更高的偏好，蓝色在中午和红色在黎明/黄昏，当这些波长是相对稀缺的。同样，蓝色啄食偏好较高的单宁染色的水，其中蓝色波长减少。总之，L. Goodei显示出强烈的视蛋白表达的昼夜周期，但这些与光强度或颜色并不紧密相关。时间可变的啄食偏好可能是由照明环境而不是视蛋白产生造成的。这些结果可能对这些鱼中观察到的颜色图案多样性产生影响。
Spatial variation in lighting environments frequently leads to population variation in colour patterns, colour preferences and visual systems. Yet lighting conditions also vary diurnally, and many aspects of visual systems and behaviour vary over this time scale. Here, we use the bluefin killifish (Lucania goodei) to compare how diurnal variation and habitat variation (clear versus tannin-stained water) affect opsin expression and the preference to peck at different-coloured objects. Opsin expression was generally lowest at midnight and dawn, and highest at midday and dusk, and this diurnal variation was many times greater than variation between habitats. Pecking preference was affected by both diurnal and habitat variation but did not correlate with opsin expression. Rather, pecking preference matched lighting conditions, with higher preferences for blue at noon and for red at dawn/dusk, when these wavelengths are comparatively scarce. Similarly, blue pecking preference was higher in tannin-stained water where blue wavelengths are reduced. In conclusion,L. goodeiexhibits strong diurnal cycles of opsin expression, but these are not tightly correlated with light intensity or colour. Temporally variable pecking preferences probably result from lighting environment rather than from opsin production. These results may have implications for the colour pattern diversity observed in these fish.
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