Low achromatic contrast sensitivity in birds: a common attribute shared by many phylogenetic orders.
| Autor: | Blary CLM; CEFE, Univ Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France.; Agence de l'environnement et de la Maîtrise de l'Energie 20, 49004 Angers Cedex 01, France., Duriez O; CEFE, Univ Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France., Bonadonna F; CEFE, Univ Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France., Mitkus M; Institute of Biosciences, Life Sciences Center, Vilnius University, 10257 Vilnius, Lithuania., Caro SP; CEFE, Univ Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France., Besnard A; CEFE, Univ Montpellier, CNRS, EPHE PSL University, IRD, 34293 Montpellier, France., Potier S; Lund Vision Group, Department of Biology, Lund University, Lund 22362, Sweden.; Les Ailes de l'Urga, 27320 Marcilly la Campagne, France. |
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| Jazyk: | angličtina |
| Zdroj: | The Journal of experimental biology [J Exp Biol] 2024 Feb 01; Vol. 227 (3). Date of Electronic Publication: 2024 Feb 09. |
| DOI: | 10.1242/jeb.246342 |
| Abstrakt: | Vision is an important sensory modality in birds, which can outperform other vertebrates in some visual abilities. However, sensitivity to achromatic contrasts - the ability to discern luminance difference between two objects or an object and its background - has been shown to be lower in birds compared with other vertebrates. We conducted a comparative study to evaluate the achromatic contrast sensitivity of 32 bird species from 12 orders using the optocollic reflex technique. We then performed an analysis to test for potential variability in contrast sensitivity depending on the corneal diameter to the axial length ratio, a proxy of the retinal image brightness. To account for potential influences of evolutionary relatedness, we included phylogeny in our analyses. We found a low achromatic contrast sensitivity for all avian species studied compared with other vertebrates (except small mammals), with high variability between species. This variability is partly related to phylogeny but appears to be independent of image brightness. Competing Interests: Competing interests The authors declare no competing or financial interests. (© 2024. Published by The Company of Biologists Ltd.) |
| Databáze: | MEDLINE |
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