The fish eye view: Are cichlids conspicuous?

Dalton, BE, Cronin, TW, Marshall, NJ and Carleton, KL (2010) The fish eye view: Are cichlids conspicuous?. Journal of Experimental Biology, 213 13: 2243-2255. doi:10.1242/jeb.037671

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Author Dalton, BE
Cronin, TW
Marshall, NJ
Carleton, KL
Title The fish eye view: Are cichlids conspicuous?
Journal name Journal of Experimental Biology   Check publisher's open access policy
ISSN 0022-0949
Publication date 2010-07-01
Sub-type Article (original research)
DOI 10.1242/jeb.037671
Open Access Status File (Publisher version)
Volume 213
Issue 13
Start page 2243
End page 2255
Total pages 13
Place of publication Cambridge, United Kingdom
Publisher The Company of Biologists
Language eng
Abstract The extent of animal colouration is determined by an interplay between natural and sexual selection. Both forces probably shape colouration in the speciose, rock-dwelling cichlids of Lake Malawi. Sexual selection is thought to drive male colouration, overcoming natural selection to create conspicuous colour patterns via female mate choice and male-male competition. However, natural selection should make female cichlids cryptic because they mouthbrood their young. We hypothesize that as a result of both sexual and natural selection, males will have colours that are more conspicuous than female colours. Cichlid spectral sensitivity, especially in the ultraviolet, probably influences how colours appear to them. Here we use simple models of the trichromatic colour space of cichlid visual systems to compare the conspicuousness of male and female nuptial colours of nine species. Conspicuousness of colours was evaluated as their Euclidian distance in colour space from environmental backgrounds and from other colours on the same fish. We find in six of the nine species that breeding males have colours that are statistically more conspicuous than female colours. These colours contrast strongly with each other or with the backgrounds, and they fall within a range of spectra best transmitted in the habitat. Female colour distances were sometimes smaller, suggesting that females of some species are more cryptic than males. Therefore, selection can differentially act to generate male colours that are more conspicuous than those in females. However, in two species, females had colours that were more conspicuous than male colours, suggesting that other selective forces and possibly sexual conflicts are acting in this system. © 2010. Published by The Company of Biologists Ltd.
Keyword Sexual selection
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
Queensland Brain Institute Publications
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Citation counts: TR Web of Science Citation Count  Cited 29 times in Thomson Reuters Web of Science Article | Citations
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Created: Sun, 27 Jun 2010, 10:04:50 EST