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Evolution of Sexual Dimorphism in Tube Blennies (Teleostei: Chaenopsidae)

The study of sexual differences provides insights into selective factors operating on males and females, especially for clades exhibiting varied levels of dimorphism. Sexual differences in morphology and coloration (melanophores) were compiled for 66 of the 89 species of tube blennies (Blenniiformes...

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Autor principal: Hastings, Philip A
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7671137/
https://www.ncbi.nlm.nih.gov/pubmed/33791520
http://dx.doi.org/10.1093/iob/obz003
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author Hastings, Philip A
author_facet Hastings, Philip A
author_sort Hastings, Philip A
collection PubMed
description The study of sexual differences provides insights into selective factors operating on males and females, especially for clades exhibiting varied levels of dimorphism. Sexual differences in morphology and coloration (melanophores) were compiled for 66 of the 89 species of tube blennies (Blenniiformes, Chaenopsidae) from the systematic literature and examination of preserved specimens. Chaenopsids include essentially monomorphic species and those in which males and females differ in as many as 17 morphological and 14 coloration features. While the sexes of most species differ in coloration (at least at the time of breeding), they are morphologically similar in Acanthemblemaria, Hemiemblemaria, and Lucayablennius. While other genera exhibit an intermediate level of dimorphism, species of Coralliozetus, Cirriemblemaria, and Emblemaria are dramatically dimorphic. Character maps on a phylogenetic hypothesis indicate that this extreme level of dimorphism evolved independently in these genera. A complex history of evolution is implied by examination of jaw length with both increases and decreases in one or both sexes leading to either dimorphism or monomorphism. Several features related to shelter defense are monomorphic in species where both sexes inhabit shelters, but dimorphic where only males occupy shelters. Other dimorphic features increase the conspicuousness of male courtship and aggressive displays.
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spelling pubmed-76711372021-03-30 Evolution of Sexual Dimorphism in Tube Blennies (Teleostei: Chaenopsidae) Hastings, Philip A Integr Org Biol Research Article The study of sexual differences provides insights into selective factors operating on males and females, especially for clades exhibiting varied levels of dimorphism. Sexual differences in morphology and coloration (melanophores) were compiled for 66 of the 89 species of tube blennies (Blenniiformes, Chaenopsidae) from the systematic literature and examination of preserved specimens. Chaenopsids include essentially monomorphic species and those in which males and females differ in as many as 17 morphological and 14 coloration features. While the sexes of most species differ in coloration (at least at the time of breeding), they are morphologically similar in Acanthemblemaria, Hemiemblemaria, and Lucayablennius. While other genera exhibit an intermediate level of dimorphism, species of Coralliozetus, Cirriemblemaria, and Emblemaria are dramatically dimorphic. Character maps on a phylogenetic hypothesis indicate that this extreme level of dimorphism evolved independently in these genera. A complex history of evolution is implied by examination of jaw length with both increases and decreases in one or both sexes leading to either dimorphism or monomorphism. Several features related to shelter defense are monomorphic in species where both sexes inhabit shelters, but dimorphic where only males occupy shelters. Other dimorphic features increase the conspicuousness of male courtship and aggressive displays. Oxford University Press 2019-03-06 /pmc/articles/PMC7671137/ /pubmed/33791520 http://dx.doi.org/10.1093/iob/obz003 Text en © The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Integrative and Comparative Biology. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Hastings, Philip A
Evolution of Sexual Dimorphism in Tube Blennies (Teleostei: Chaenopsidae)
title Evolution of Sexual Dimorphism in Tube Blennies (Teleostei: Chaenopsidae)
title_full Evolution of Sexual Dimorphism in Tube Blennies (Teleostei: Chaenopsidae)
title_fullStr Evolution of Sexual Dimorphism in Tube Blennies (Teleostei: Chaenopsidae)
title_full_unstemmed Evolution of Sexual Dimorphism in Tube Blennies (Teleostei: Chaenopsidae)
title_short Evolution of Sexual Dimorphism in Tube Blennies (Teleostei: Chaenopsidae)
title_sort evolution of sexual dimorphism in tube blennies (teleostei: chaenopsidae)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7671137/
https://www.ncbi.nlm.nih.gov/pubmed/33791520
http://dx.doi.org/10.1093/iob/obz003
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