Mosaic and concerted evolution in the visual system of birds

Simple item page
dc.contributor.authorGutierrez-Ibanez, Cristian I.
dc.contributor.authorIwaniuk, Andrew N.
dc.contributor.authorMoore, Bret A.
dc.contributor.authorFernandez-Juricic, Esteban
dc.contributor.authorCorfield, Jeremy R.
dc.contributor.authorKrilow, Justin M.
dc.contributor.authorKolominsky, Jeffrey
dc.contributor.authorWylie, Douglas R.
dc.date.accessioned2016-11-15T23:22:02Z
dc.date.available2016-11-15T23:22:02Z
dc.date.issued2014
dc.descriptionSherpa Romeo green journal: open accessen_US
dc.description.abstractTwo main models have been proposed to explain how the relative size of neural structures varies through evolution. In the mosaic evolution model, individual brain structures vary in size independently of each other, whereas in the concerted evolution model developmental constraints result in different parts of the brain varying in size in a coordinated manner. Several studies have shown variation of the relative size of individual nuclei in the vertebrate brain, but it is currently not known if nuclei belonging to the same functional pathway vary independently of each other or in a concerted manner. The visual system of birds offers an ideal opportunity to specifically test which of the two models apply to an entire sensory pathway. Here, we examine the relative size of 9 different visual nuclei across 98 species of birds. This includes data on interspecific variation in the cytoarchitecture and relative size of the isthmal nuclei, which has not been previously reported. We also use a combination of statistical analyses, phylogenetically corrected principal component analysis and evolutionary rates of change on the absolute and relative size of the nine nuclei, to test if visual nuclei evolved in a concerted or mosaic manner. Our results strongly indicate a combination of mosaic and concerted evolution (in the relative size of nine nuclei) within the avian visual system. Specifically, the relative size of the isthmal nuclei and parts of the tectofugal pathway covary across species in a concerted fashion, whereas the relative volume of the other visual nuclei measured vary independently of one another, such as that predicted by the mosaic model. Our results suggest the covariation of different neural structures depends not only on the functional connectivity of each nucleus, but also on the diversity of afferents and efferents of each nucleus.en_US
dc.description.peer-reviewYesen_US
dc.identifier.citationGutierrez-Ibanez, C. I., Iwaniuk, A. N., Moore, B. A., Fernandez-Juricic, E., Corfield, J. R., Krilow, J. M., ... & Wylie, D. R. (2014). Mosaic and concerted evolution in the visual system of birds. PLoS ONE, 9(3), e90102. doi:10.1371/journal.pone.0090102en_US
dc.identifier.urihttps://hdl.handle.net/10133/4696
dc.language.isoen_CAen_US
dc.publisherPublic Library of Scienceen_US
dc.publisher.departmentDepartment of Neuroscienceen_US
dc.publisher.facultyArts and Scienceen_US
dc.publisher.institutionUniversity of Albertaen_US
dc.publisher.institutionUniversity of Lethbridgeen_US
dc.publisher.institutionPurdue Universityen_US
dc.subjectAvian visual systemen_US
dc.subjectVisual system of birdsen_US
dc.subjectMosaic evolution modelen_US
dc.subjectConcerted evolution modelen_US
dc.subjectVisual nucleien_US
dc.subjectIsthmal nucleien_US
dc.titleMosaic and concerted evolution in the visual system of birdsen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Iwaniuk mosaic and concerted evolution in the visual.pdf
Size:
4.23 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
3.13 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Iwaniuk, Andrew