Cone monochromacy and visual pigment spectral tuning in wobbegong sharks

Theiss, Susan M., Davies, Wayne I. L., Collin, Shaun P., Hunt, David M. and Hart, Nathan S. (2012) Cone monochromacy and visual pigment spectral tuning in wobbegong sharks. Biology Letters, 8 6: 1019-1022. doi:10.1098/rsbl.2012.0663


Author Theiss, Susan M.
Davies, Wayne I. L.
Collin, Shaun P.
Hunt, David M.
Hart, Nathan S.
Title Cone monochromacy and visual pigment spectral tuning in wobbegong sharks
Journal name Biology Letters   Check publisher's open access policy
ISSN 1744-9561
1744-957X
Publication date 2012-12
Sub-type Article (original research)
DOI 10.1098/rsbl.2012.0663
Open Access Status
Volume 8
Issue 6
Start page 1019
End page 1022
Total pages 4
Place of publication London, United Kingdom
Publisher The Royal Society Publishing
Collection year 2013
Language eng
Abstract Much is known regarding the evolution of colour vision in nearly every vertebrate class, with the notable exception of the elasmobranchs. While multiple spectrally distinct cone types are found in some rays, sharks appear to possess only a single class of cone and, therefore, may be colour blind. In this study, the visual opsin genes of two wobbegong species, Orectolobus maculatus and Orectolobus ornatus, were isolated to verify the molecular basis of their monochromacy. In both species, only two opsin genes are present, RH1 (rod) and LWS (cone), which provide further evidence to support the concept that sharks possess only a single cone type. Examination of the coding sequences revealed substitutions that account for interspecific variation in the photopigment absorbance spectra, which may reflect the difference in visual ecology between these species.
Keyword Shark
Monochromacy
Opsin
Rod
Cone
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online September 19, 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
Official 2013 Collection
 
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