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Divergence in brain size and brain region volumes across wild guppy populations
Complex evolutionary dynamics have produced extensive variation in brain anatomy in the animal world. In guppies, Poecilia reticulata, brain size and anatomy have been extensively studied in the laboratory contributing to our understanding of brain evolution and the cognitive advantages that arise w...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9399710/ https://www.ncbi.nlm.nih.gov/pubmed/36000235 http://dx.doi.org/10.1098/rspb.2021.2784 |
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author | Reyes, Angie S. Bittar, Amaury Ávila, Laura C. Botia, Catalina Esmeral, Natalia P. Bloch, Natasha I. |
author_facet | Reyes, Angie S. Bittar, Amaury Ávila, Laura C. Botia, Catalina Esmeral, Natalia P. Bloch, Natasha I. |
author_sort | Reyes, Angie S. |
collection | PubMed |
description | Complex evolutionary dynamics have produced extensive variation in brain anatomy in the animal world. In guppies, Poecilia reticulata, brain size and anatomy have been extensively studied in the laboratory contributing to our understanding of brain evolution and the cognitive advantages that arise with brain anatomical variation. However, it is unclear whether these laboratory results can be translated to natural populations. Here, we study brain neuroanatomy and its relationship with sexual traits across 18 wild guppy populations in diverse environments. We found extensive variation in female and male relative brain size and brain region volumes across populations in different environment types and with varying degrees of predation risk. In contrast with laboratory studies, we found differences in allometric scaling of brain regions, leading to variation in brain region proportions across populations. Finally, we found an association between sexual traits, mainly the area of black patches and tail length, and brain size. Our results suggest differences in ecological conditions and sexual traits are associated with differences in brain size and brain regions volumes in the wild, as well as sexual dimorphisms in the brain's neuroanatomy. |
format | Online Article Text |
id | pubmed-9399710 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-93997102022-08-27 Divergence in brain size and brain region volumes across wild guppy populations Reyes, Angie S. Bittar, Amaury Ávila, Laura C. Botia, Catalina Esmeral, Natalia P. Bloch, Natasha I. Proc Biol Sci Special Feature Complex evolutionary dynamics have produced extensive variation in brain anatomy in the animal world. In guppies, Poecilia reticulata, brain size and anatomy have been extensively studied in the laboratory contributing to our understanding of brain evolution and the cognitive advantages that arise with brain anatomical variation. However, it is unclear whether these laboratory results can be translated to natural populations. Here, we study brain neuroanatomy and its relationship with sexual traits across 18 wild guppy populations in diverse environments. We found extensive variation in female and male relative brain size and brain region volumes across populations in different environment types and with varying degrees of predation risk. In contrast with laboratory studies, we found differences in allometric scaling of brain regions, leading to variation in brain region proportions across populations. Finally, we found an association between sexual traits, mainly the area of black patches and tail length, and brain size. Our results suggest differences in ecological conditions and sexual traits are associated with differences in brain size and brain regions volumes in the wild, as well as sexual dimorphisms in the brain's neuroanatomy. The Royal Society 2022-08-31 2022-08-24 /pmc/articles/PMC9399710/ /pubmed/36000235 http://dx.doi.org/10.1098/rspb.2021.2784 Text en © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Special Feature Reyes, Angie S. Bittar, Amaury Ávila, Laura C. Botia, Catalina Esmeral, Natalia P. Bloch, Natasha I. Divergence in brain size and brain region volumes across wild guppy populations |
title | Divergence in brain size and brain region volumes across wild guppy populations |
title_full | Divergence in brain size and brain region volumes across wild guppy populations |
title_fullStr | Divergence in brain size and brain region volumes across wild guppy populations |
title_full_unstemmed | Divergence in brain size and brain region volumes across wild guppy populations |
title_short | Divergence in brain size and brain region volumes across wild guppy populations |
title_sort | divergence in brain size and brain region volumes across wild guppy populations |
topic | Special Feature |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9399710/ https://www.ncbi.nlm.nih.gov/pubmed/36000235 http://dx.doi.org/10.1098/rspb.2021.2784 |
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