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Expanded olfactory system in ray-finned fishes capable of terrestrial exploration

BACKGROUND: Smell abilities differ greatly among vertebrate species due to distinct sensory needs, with exceptional variability reported in the number of olfactory genes and the size of the odour-processing regions of the brain. However, key environmental factors shaping genomic and phenotypic chang...

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Autores principales: Burguera, Demian, Dionigi, Francesco, Kverková, Kristina, Winkler, Sylke, Brown, Thomas, Pippel, Martin, Zhang, Yicheng, Shafer, Maxwell, Nichols, Annika L. A., Myers, Eugene, Němec, Pavel, Musilova, Zuzana
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10392011/
https://www.ncbi.nlm.nih.gov/pubmed/37525196
http://dx.doi.org/10.1186/s12915-023-01661-8
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author Burguera, Demian
Dionigi, Francesco
Kverková, Kristina
Winkler, Sylke
Brown, Thomas
Pippel, Martin
Zhang, Yicheng
Shafer, Maxwell
Nichols, Annika L. A.
Myers, Eugene
Němec, Pavel
Musilova, Zuzana
author_facet Burguera, Demian
Dionigi, Francesco
Kverková, Kristina
Winkler, Sylke
Brown, Thomas
Pippel, Martin
Zhang, Yicheng
Shafer, Maxwell
Nichols, Annika L. A.
Myers, Eugene
Němec, Pavel
Musilova, Zuzana
author_sort Burguera, Demian
collection PubMed
description BACKGROUND: Smell abilities differ greatly among vertebrate species due to distinct sensory needs, with exceptional variability reported in the number of olfactory genes and the size of the odour-processing regions of the brain. However, key environmental factors shaping genomic and phenotypic changes linked to the olfactory system remain difficult to identify at macroevolutionary scales. Here, we investigate the association between diverse ecological traits and the number of olfactory chemoreceptors in approximately two hundred ray-finned fishes. RESULTS: We found independent expansions producing large gene repertoires in several lineages of nocturnal amphibious fishes, generally able to perform active terrestrial exploration. We reinforced this finding with on-purpose genomic and transcriptomic analysis of Channallabes apus, a catfish species from a clade with chemosensory-based aerial orientation. Furthermore, we also detected an augmented information-processing capacity in the olfactory bulb of nocturnal amphibious fishes by estimating the number of cells contained in this brain region in twenty-four actinopterygian species. CONCLUSIONS: Overall, we report a convergent genomic and phenotypic magnification of the olfactory system in nocturnal amphibious fishes. This finding suggests the possibility of an analogous evolutionary event in fish-like tetrapod ancestors during the first steps of the water-to-land transition, favouring terrestrial adaptation through enhanced aerial orientation. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12915-023-01661-8.
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spelling pubmed-103920112023-08-02 Expanded olfactory system in ray-finned fishes capable of terrestrial exploration Burguera, Demian Dionigi, Francesco Kverková, Kristina Winkler, Sylke Brown, Thomas Pippel, Martin Zhang, Yicheng Shafer, Maxwell Nichols, Annika L. A. Myers, Eugene Němec, Pavel Musilova, Zuzana BMC Biol Research Article BACKGROUND: Smell abilities differ greatly among vertebrate species due to distinct sensory needs, with exceptional variability reported in the number of olfactory genes and the size of the odour-processing regions of the brain. However, key environmental factors shaping genomic and phenotypic changes linked to the olfactory system remain difficult to identify at macroevolutionary scales. Here, we investigate the association between diverse ecological traits and the number of olfactory chemoreceptors in approximately two hundred ray-finned fishes. RESULTS: We found independent expansions producing large gene repertoires in several lineages of nocturnal amphibious fishes, generally able to perform active terrestrial exploration. We reinforced this finding with on-purpose genomic and transcriptomic analysis of Channallabes apus, a catfish species from a clade with chemosensory-based aerial orientation. Furthermore, we also detected an augmented information-processing capacity in the olfactory bulb of nocturnal amphibious fishes by estimating the number of cells contained in this brain region in twenty-four actinopterygian species. CONCLUSIONS: Overall, we report a convergent genomic and phenotypic magnification of the olfactory system in nocturnal amphibious fishes. This finding suggests the possibility of an analogous evolutionary event in fish-like tetrapod ancestors during the first steps of the water-to-land transition, favouring terrestrial adaptation through enhanced aerial orientation. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12915-023-01661-8. BioMed Central 2023-07-31 /pmc/articles/PMC10392011/ /pubmed/37525196 http://dx.doi.org/10.1186/s12915-023-01661-8 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Burguera, Demian
Dionigi, Francesco
Kverková, Kristina
Winkler, Sylke
Brown, Thomas
Pippel, Martin
Zhang, Yicheng
Shafer, Maxwell
Nichols, Annika L. A.
Myers, Eugene
Němec, Pavel
Musilova, Zuzana
Expanded olfactory system in ray-finned fishes capable of terrestrial exploration
title Expanded olfactory system in ray-finned fishes capable of terrestrial exploration
title_full Expanded olfactory system in ray-finned fishes capable of terrestrial exploration
title_fullStr Expanded olfactory system in ray-finned fishes capable of terrestrial exploration
title_full_unstemmed Expanded olfactory system in ray-finned fishes capable of terrestrial exploration
title_short Expanded olfactory system in ray-finned fishes capable of terrestrial exploration
title_sort expanded olfactory system in ray-finned fishes capable of terrestrial exploration
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10392011/
https://www.ncbi.nlm.nih.gov/pubmed/37525196
http://dx.doi.org/10.1186/s12915-023-01661-8
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