Zebrafish differentially process colour across visual space to match natural scenes

Zebrafish differentially process colour across visual space to match natural scenes
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斑马鱼在视觉空间中差异化地处理颜色以匹配自然场景

DOI:
10.1101/230144
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发表时间:
2017
期刊:
bioRxiv
影响因子:
--
通讯作者:
Berens
Berens
中科院分区:
--
文献类型:
--
作者:
Zimmermann;M. J. Y;Nevala;Yosimatsu;Osorio;Nilsson;Berens

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动物的眼睛已经进化到能够处理行为上重要的视觉信息,但视网膜如何处理视觉空间中的统计不对称性仍然知之甚少。通过现场高光谱成像、视网膜神经元体内双光子成像和解剖学,我们展示了斑马鱼幼体使用高度各向异性的视网膜来不对称地调查它们的自然视觉世界。首先,不同的神经元支配着眼睛的不同部分,并与内部视网膜功能的系统性转变有关:在动物上方,自然界中几乎没有颜色,视网膜回路基本上是消色差的。相反,较低的视野和地平线色彩丰富,并且主要由色彩和色彩对立电路进行测量,这些电路在光谱上与自然界的主要色轴相匹配。其次,在水平和下视野中,编码消色差和颜色对立视觉特征的双极细胞终端被系统地排列到视网膜内层的不同层中。第三,在额地平线上方,高增益紫外线系统搭载在视网膜回路上,可能有助于捕获猎物。
Animal eyes have evolved to process behaviorally important visual information, but how retinas deal with statistical asymmetries in visual space remains poorly understood. Using hyperspectral imaging in the field,in vivo2-photon imaging of retinal neurons, and anatomy, here we show that larval zebrafish use a highly anisotropic retina to asymmetrically survey their natural visual world. First, different neurons dominate different parts of the eye and are linked to a systematic shift in inner retinal function: above the animal, there is little color in nature, and retinal circuits are largely achromatic. Conversely, the lower visual field and horizon are color rich and are predominately surveyed by chromatic and color-opponent circuits that are spectrally matched to the dominant chromatic axes in nature. Second, in the horizontal and lower visual field, bipolar cell terminals encoding achromatic and color-opponent visual features are systematically arranged into distinct layers of the inner retina. Third, above the frontal horizon, a high-gain UV system piggybacks onto retinal circuits, likely to support prey capture.
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