Functional diversity in the color vision of cichlid fishes |
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Authors: | Shai Sabbah Raico Lamela Laria Suzanne M Gray Craig W Hawryshyn |
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Affiliation: | (1) Department of Biology, Queen's University, K7L 3N6 Kingston, ON, Canada;(2) Department of Biology, McGill University, H3A 1B1 Montreal, QC, Canada;(3) Centre for Neuroscience Studies, Queen's University, K7L 3N6 Kingston, ON, Canada |
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Abstract: | Background Color vision plays a critical role in visual behavior. An animal's capacity for color vision rests on the presence of differentially sensitive cone photoreceptors. Spectral sensitivity is a measure of the visual responsiveness of these cones at different light wavelengths. Four classes of cone pigments have been identified in vertebrates, but in teleost fishes, opsin genes have undergone gene duplication events and thus can produce a larger number of spectrally distinct cone pigments. In this study, we examine the question of large-scale variation in color vision with respect to individual, sex and species that may result from differential expression of cone pigments. Cichlid fishes are an excellent model system for examining variation in spectral sensitivity because they have seven distinct cone opsin genes that are differentially expressed. |
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