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Vision and visual variation in the peacock blenny

dc.contributor.authorWhite, E. M.
dc.contributor.authorGonçalves, David
dc.contributor.authorPartridge, Julian C.
dc.contributor.authorOliveira, Rui Filipe
dc.date.accessioned2012-03-26T19:10:26Z
dc.date.available2012-03-26T19:10:26Z
dc.date.issued2004
dc.description.abstractMicrospectrophotometry (MSP) revealed the presence of a rod and at least two cone classes (mid- and long-wavelength sensitive) in the intertidal peacock blenny Salaria pavo. Both rhodopsin and porphyropsin based visual pigments were found in all fish, together with high individual variation in chromophore ratio. The three morphs (females, males and sneaker males) differed in their spectral sensitivities (as measured with the optomotor response) with sneakers having higher sensitivity at long-wavelengths than either males or females. This longwave displacement of peak sensitivity could be due elevated proportions of porphyropsin visual pigments in the sneakers’ retinae. The lenses of all morphs exhibited a short-wavelength cut-off and an unusual layer of carotenoid was found behind the retinal pigment epithelium and in the outer segments of some cones. These screening pigments could serve a photo-protective role or to improve visual contrast. No short-wave photoreceptors were located using MSP. This indicates that this cone class may be absent or present at very low numbers in the retina. This is the first in depth study of the visual system of a blenniid fish and indicates potential within-species visual variation that may be related to the species’ habitat and morph-specific behavioural requirements.por
dc.identifier.citationJournal of Fish Biology, 65, 227-250por
dc.identifier.issn0022-1112
dc.identifier.urihttp://hdl.handle.net/10400.12/1298
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherBlackwell Publishingpor
dc.subjectIntertidal fishespor
dc.subjectLight environmentpor
dc.subjectMicrospectrophotometrypor
dc.subjectOptomotor responsepor
dc.subjectVisual variationpor
dc.titleVision and visual variation in the peacock blennypor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceOxfordpor
oaire.citation.endPage250por
oaire.citation.startPage227por
oaire.citation.titleJournal of Fish Biologypor
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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