Spectral sensitivity of the Hawaiian saddle wrasse, Thalassoma duperrey, and implications for visually mediated behaviour on coral reefs
Spectral sensitivity of the Hawaiian saddle wrasse, Thalassoma duperrey, and implications for visually mediated behaviour on coral reefs
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DOI：
10.1023/a:1007556112449
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发表时间：
1999-12-01
影响因子：
1.4
通讯作者：
Hawryshyn, CW
中科院分区：
文献类型：
--
作者：
Barry, KL;Hawryshyn, CW
虽然热带珊瑚礁是光谱最复杂的栖息地之一，但对珊瑚鱼的色觉知之甚少。在这项研究中，我们测量的光谱灵敏度的夏威夷特有的珊瑚礁鱼，Thalassoma duperrey（家庭Labridae），并评估可能的作用，视觉灵敏度介导种内通信。使用视网膜神经节细胞复合动作电位的电生理记录来生成特定波长（380-620 nm）的光谱灵敏度曲线。我们发现至少有2个灵敏度峰的响应（λ（最大）=460，550 nm）。为了定量研究同种个体的视觉刺激，采用了T.用分光辐射计测量了Duperrey。计算图案的色块之间以及色块与自然背景（即，水和珊瑚）。蓝色头部的反射率和蓝色、绿色和红色斑块的对比度与T.杜佩里，虽然这取决于背景的类型。结果表明，T. duperrey应该能够通过视觉检测同种鱼的颜色模式，而T. duperrey的视觉系统是设计来加强目标探测在珊瑚礁栖息地与匹配和偏移锥机制。
Although tropical coral reefs are one of the most spectrally complex habitats, there is relatively little known about colour vision of reef fish. In this study, we measured the spectral sensitivity of an endemic Hawaiian coral reef fish, Thalassoma duperrey (family Labridae), and assessed the possible role of visual sensitivity in mediating intraspecific communication. Electrophysiological recordings of compound action potentials from retinal ganglion cells were used to generate spectral sensitivity curves for specific wavelengths (380-620 nm). We found at least 2 sensitivity peaks for the on response (lambda(max)=460, 550 nm). The off response lacked a short wavelength mechanism but a medium wavelength mechanism (lambda(max)=545 nm) and a longwave mechanism (lambda(max)=570 nm) were found. To quantify the visual stimulus provided by a conspecific individual, spectral reflectance from the colour pattern of T. duperrey was measured with a spectroradiometer. Luminance and spectral contrast were computed between colour patches of the pattern and between the patches and natural backgrounds (i.e., water and coral). Reflectance from the blue head and contrast from the blue, green and red patches matched the sensitivity maxima of T. duperrey, although this depended on the type of background. Our results indicate that T. duperrey should be able to visually detect the colour pattern of a conspecific fish and that T. duperrey's visual system is designed to enhance target detection in the coral reef habitat with matched and offset cone mechanisms.