Red fluorescence in reef fish: a novel signalling mechanism?
Red fluorescence in reef fish: a novel signalling mechanism?
复制标题
DOI：
10.1186/1472-6785-8-16
复制
发表时间：
2008-09-16
期刊：
影响因子：
--
通讯作者：
Wucherer MF
中科院分区：
文献类型：
--
作者：
Michiels NK;Anthes N;Hart NS;Herler J;Meixner AJ;Schleifenbaum F;Schulte G;Siebeck UE;Sprenger D;Wucherer MF
在 10 m 以下的深度，珊瑚礁主要以蓝绿光为主，因为海水选择性地吸收来自下流阳光的 600 nm 以上的较长“红色”波长。因此，许多珊瑚鱼的视觉色素与较短的波长相匹配，这些波长可以更好地通过水传播。结合鱼眼通常较差的长波长敏感性以及假定缺乏环境红光，红光目前被认为与珊瑚鱼无关。然而，之前的研究忽略了这样一个事实：包括深海鱼类在内的几种海洋生物会产生自己的红色发光并且能够看到它。我们在此报告称，来自 16 属 5 科的至少 32 种珊瑚鱼在自然白天条件下、在几乎不存在下流红光的深度下显示出明显的红色荧光。在实验室中通过广泛的光谱测定证实了荧光。在大多数情况下，峰值发射在 600 nm 左右，荧光与鸟嘌呤晶体相关，迄今为止，鸟嘌呤晶体仅因其光反射特性而闻名。我们的数据表明红色荧光可能在种内通讯的背景下发挥作用。荧光图案通常与眼睛或头部相关，即使在同一属的物种之间也有很大差异。此外，参与种内信号传导的鳍中的红色荧光特别强。最后，一种荧光虾虎鱼（Eviota pellucida）的显微光谱显示出长波敏感性，与其自身的红色荧光重叠，表明该物种能够看到自己的荧光。我们发现红色荧光在海洋鱼类中广泛存在。许多特征表明，它被用作小型、底栖、成对或群居鱼类的私人通讯机制。其中许多物种在可见光谱的其他部分表现出相当神秘的色彩。红色荧光的高度特异性间变异及其与特异性内信号传导中使用的结构的关联进一步证实了这一观点。我们的研究结果挑战了红光对海洋鱼类不重要的观点，呼吁重新评估其在地下海洋环境中鱼类视觉生态中的作用。
At depths below 10 m, reefs are dominated by blue-green light because seawater selectively absorbs the longer, 'red' wavelengths beyond 600 nm from the downwelling sunlight. Consequently, the visual pigments of many reef fish are matched to shorter wavelengths, which are transmitted better by water. Combining the typically poor long-wavelength sensitivity of fish eyes with the presumed lack of ambient red light, red light is currently considered irrelevant for reef fish. However, previous studies ignore the fact that several marine organisms, including deep sea fish, produce their own red luminescence and are capable of seeing it. We here report that at least 32 reef fishes from 16 genera and 5 families show pronounced red fluorescence under natural, daytime conditions at depths where downwelling red light is virtually absent. Fluorescence was confirmed by extensive spectrometry in the laboratory. In most cases peak emission was around 600 nm and fluorescence was associated with guanine crystals, which thus far were known for their light reflecting properties only. Our data indicate that red fluorescence may function in a context of intraspecific communication. Fluorescence patterns were typically associated with the eyes or the head, varying substantially even between species of the same genus. Moreover red fluorescence was particularly strong in fins that are involved in intraspecific signalling. Finally, microspectrometry in one fluorescent goby, Eviota pellucida, showed a long-wave sensitivity that overlapped with its own red fluorescence, indicating that this species is capable of seeing its own fluorescence. We show that red fluorescence is widespread among marine fishes. Many features indicate that it is used as a private communication mechanism in small, benthic, pair- or group-living fishes. Many of these species show quite cryptic colouration in other parts of the visible spectrum. High inter-specific variation in red fluorescence and its association with structures used in intra-specific signalling further corroborate this view. Our findings challenge the notion that red light is of no importance to marine fish, calling for a reassessment of its role in fish visual ecology in subsurface marine environments.
登录
查看更多内容
影响因子：
2.8
作者：
Hart, NS
通讯作者：
Hart, NS
影响因子：
1.4
作者：
Barry, KL;Hawryshyn, CW
通讯作者：
Hawryshyn, CW
影响因子：
3.5
作者：
Fradkov, AF;Chen, Y;Lukyanov, SA
通讯作者：
Lukyanov, SA
影响因子：
2.5
作者：
Job, SD;Shand, J
通讯作者：
Shand, J
影响因子：
64.8
作者：
LIMBAUGH, C;NORTH, WJ
通讯作者：
NORTH, WJ