Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.

Analyses of the macroevolutionary correlates of brain structure volumes allow pinpointing of selective pressures influencing specific structures. Here we use a multiple regression framework, including phylogenetic information, to analyze brain structure evolution in 43 Tanganyikan cichlid species. W...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Alejandro Gonzalez-Voyer, Niclas Kolm
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2010
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8fc60d0f7dc8499ea3a99f17f4f8b925
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8fc60d0f7dc8499ea3a99f17f4f8b925
record_format	dspace
spelling	oai:doaj.org-article:8fc60d0f7dc8499ea3a99f17f4f8b9252021-11-18T07:01:36ZSex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.1932-620310.1371/journal.pone.0014355https://doaj.org/article/8fc60d0f7dc8499ea3a99f17f4f8b9252010-12-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21179407/?tool=EBIhttps://doaj.org/toc/1932-6203Analyses of the macroevolutionary correlates of brain structure volumes allow pinpointing of selective pressures influencing specific structures. Here we use a multiple regression framework, including phylogenetic information, to analyze brain structure evolution in 43 Tanganyikan cichlid species. We analyzed the effect of ecological and sexually selected traits for species averages, the effect of ecological traits for each sex separately and the influence of sexual selection on structure dimorphism. Our results indicate that both ecological and sexually selected traits have influenced brain structure evolution. The patterns observed in males and females generally followed those observed at the species level. Interestingly, our results suggest that strong sexual selection is associated with reduced structure volumes, since all correlations between sexually selected traits and structure volumes were negative and the only statistically significant association between sexual selection and structure dimorphism was also negative. Finally, we previously found that monoparental female care was associated with increased brain size. However, here cerebellum and hypothalamus volumes, after controlling for brain size, associated negatively with female-only care. Thus, in accord with the mosaic model of brain evolution, brain structure volumes may not respond proportionately to changes in brain size. Indeed selection favoring larger brains can simultaneously lead to a reduction in relative structure volumes.Alejandro Gonzalez-VoyerNiclas KolmPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 5, Iss 12, p e14355 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alejandro Gonzalez-Voyer Niclas Kolm Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.
description	Analyses of the macroevolutionary correlates of brain structure volumes allow pinpointing of selective pressures influencing specific structures. Here we use a multiple regression framework, including phylogenetic information, to analyze brain structure evolution in 43 Tanganyikan cichlid species. We analyzed the effect of ecological and sexually selected traits for species averages, the effect of ecological traits for each sex separately and the influence of sexual selection on structure dimorphism. Our results indicate that both ecological and sexually selected traits have influenced brain structure evolution. The patterns observed in males and females generally followed those observed at the species level. Interestingly, our results suggest that strong sexual selection is associated with reduced structure volumes, since all correlations between sexually selected traits and structure volumes were negative and the only statistically significant association between sexual selection and structure dimorphism was also negative. Finally, we previously found that monoparental female care was associated with increased brain size. However, here cerebellum and hypothalamus volumes, after controlling for brain size, associated negatively with female-only care. Thus, in accord with the mosaic model of brain evolution, brain structure volumes may not respond proportionately to changes in brain size. Indeed selection favoring larger brains can simultaneously lead to a reduction in relative structure volumes.
format	article
author	Alejandro Gonzalez-Voyer Niclas Kolm
author_facet	Alejandro Gonzalez-Voyer Niclas Kolm
author_sort	Alejandro Gonzalez-Voyer
title	Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.
title_short	Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.
title_full	Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.
title_fullStr	Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.
title_full_unstemmed	Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.
title_sort	sex, ecology and the brain: evolutionary correlates of brain structure volumes in tanganyikan cichlids.
publisher	Public Library of Science (PLoS)
publishDate	2010
url	https://doaj.org/article/8fc60d0f7dc8499ea3a99f17f4f8b925
work_keys_str_mv	AT alejandrogonzalezvoyer sexecologyandthebrainevolutionarycorrelatesofbrainstructurevolumesintanganyikancichlids AT niclaskolm sexecologyandthebrainevolutionarycorrelatesofbrainstructurevolumesintanganyikancichlids
_version_	1718424056359813120

Sex, ecology and the brain: evolutionary correlates of brain structure volumes in Tanganyikan cichlids.

Ejemplares similares