The visual ecology of avian photoreceptors

Hart, Nathan S. (2001) The visual ecology of avian photoreceptors. Progress In Retinal And Eye Research, 20 5: 675-703. doi:10.1016/S1350-9462(01)00009-X

Author Hart, Nathan S.
Title The visual ecology of avian photoreceptors
Journal name Progress In Retinal And Eye Research   Check publisher's open access policy
ISSN 1350-9462
Publication date 2001-09-01
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1016/S1350-9462(01)00009-X
Open Access Status Not yet assessed
Volume 20
Issue 5
Start page 675
End page 703
Total pages 29
Editor N. Osborne
G. Chader
Place of publication Oxford, Great Britain
Publisher Elsevier Science
Language eng
Subject C1
270604 Comparative Physiology
780105 Biological sciences
Abstract The spectral sensitivities of avian retinal photoreceptors are examined with respect to microspectrophotometric measurements of single cells, spectrophotometric measurements of extracted or in vitro regenerated visual pigments, and molecular genetic analyses of visual pigment opsin protein sequences. Bird species from diverse orders are compared in relation to their evolution, their habitats and the multiplicity of visual tasks they must perform. Birds have five different types of visual pigment and seven different types of photo receptor-rods, double (uneven twin) cones and four types of single cone. The spectral locations of the wavelengths of maximum absorbance (lambda (max)) of the different visual pigments, and the spectral transmittance characteristics of the intraocular spectral filters (cone oil droplets) that also determine photoreceptor spectral sensitivity, vary according to both habitat and phylogenetic relatedness. The primary influence on avian retinal design appears to be the range of wavelengths available for vision, regardless of whether that range is determined by the spectral distribution of the natural illumination or the spectral transmittance of the ocular media (cornea, aqueous humour, lens, vitreous humour). Nevertheless, other variations in spectral sensitivity exist that reflect the variability and complexity of avian visual ecology. (C) 2001 Elsevier Science Ltd. All rights reserved.
Keyword Ophthalmology
Cone Oil Droplets
Pigeon Columba-livia
Fish Danio-aequipinnatus
Spectral Sensitivity
Chicken Retina
Ultraviolet Vision
Passeriform Bird
Bovine Rhodopsin
Q-Index Code C1
Institutional Status UQ

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collection: School of Biomedical Sciences Publications
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 310 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 319 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Wed, 15 Aug 2007, 01:15:08 EST