Kondrashev Sergei L
Laboratory of Physiology, A.V. Zhirmunsky Institute of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, 17 Palchevskogo Street, Vladivostok 690041, Russia.
Vision Res. 2008 Sep;48(21):2269-74. doi: 10.1016/j.visres.2008.07.004. Epub 2008 Aug 21.
Microspectrophotometry (MSP) revealed that surprisingly for a "fully marine" species, in summer, photoreceptors of the nearshore scorpaeniform fish known as the masked greenling, Hexagrammos octogrammus, contained exclusively, or presumably, porphyropsin with a small admixture of rhodopsin. As a result of this, the lambda(max) of the spectral sensitivity of the photoreceptors were significantly shifted to longer wavelengths as compared to the lambda(max) typical of marine shallow-water fishes, showing about 530 nm for rods and single cones, and 570/625 nm for double-cone members. These unique spectral shifts would permit a cone-driven wavelength discrimination in spite of high-density orange corneal filters which block light at lower wavelengths.
显微分光光度测定法（MSP）显示，令人惊讶的是，对于一种“完全生活在海洋中的”物种，在夏季，一种被称为六线鱼（Hexagrammos octogrammus）的近岸鲉形目鱼类的光感受器，仅含有或可能仅含有视紫蓝质，并混有少量视紫红质。因此，与典型的海洋浅水鱼类相比，这些光感受器的光谱敏感度的最大波长（λmax）显著向更长波长偏移，棒体细胞和单锥体的λmax约为530纳米，双锥体成员的λmax为570/625纳米。尽管存在高密度橙色角膜滤光片会阻挡较短波长的光，但这些独特的光谱偏移仍能实现由锥体驱动的波长辨别。
