Summary
Structure-function studies were undertaken on cones in the retina of the cyprinid fish, the roach,Rutilus rutilus, in order to provide a basis for analysis of colour information by post-receptoral neurones. Measurements were made with two main aims: (i) To determine by microspectrophotometry the absorbance spectra of the photopigments present within the retina, and correlate these with the morphological types of photoreceptor; (ii) To characterize the morphologies of the photoreceptors at both light and electron microscopical levels and determine their relative abundance in the retina. In addition to red-, green-, and blue-sensitive cones, an ultra-violet-sensitive photoreceptor has been found in a sub-population of miniature short single cones. Possible relevance of this finding to vertebrate vision is discussed.
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Downing, J.E.G., Djamgoz, M.B.A. & Bowmaker, J.K. Photoreceptors of a cyprinid fish, the roach: morphological and spectral characteristics. J. Comp. Physiol. 159, 859–868 (1986). https://doi.org/10.1007/BF00603739
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DOI: https://doi.org/10.1007/BF00603739