Hybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).

Natural hybridization may result in the exchange of genetic material between divergent lineages and even the formation of new taxa. Many of the Neo-Darwinian architects argued that, particularly for animal clades, natural hybridization was maladaptive. Recent evidence, however, has falsified this hy...

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Autores principales:	Ana R Amaral, Gretchen Lovewell, Maria M Coelho, George Amato, Howard C Rosenbaum
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/95f42e535de14bbfa246f6c6bb75d1fa
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spelling	oai:doaj.org-article:95f42e535de14bbfa246f6c6bb75d1fa2021-11-18T08:38:18ZHybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).1932-620310.1371/journal.pone.0083645https://doaj.org/article/95f42e535de14bbfa246f6c6bb75d1fa2014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24421898/?tool=EBIhttps://doaj.org/toc/1932-6203Natural hybridization may result in the exchange of genetic material between divergent lineages and even the formation of new taxa. Many of the Neo-Darwinian architects argued that, particularly for animal clades, natural hybridization was maladaptive. Recent evidence, however, has falsified this hypothesis, instead indicating that this process may lead to increased biodiversity through the formation of new species. Although such cases of hybrid speciation have been described in plants, fish and insects, they are considered exceptionally rare in mammals. Here we present evidence for a marine mammal, Stenella clymene, arising through natural hybridization. We found phylogenetic discordance between mitochondrial and nuclear markers, which, coupled with a pattern of transgressive segregation seen in the morphometric variation of some characters, support a case of hybrid speciation. S. clymene is currently genetically differentiated from its putative parental species, Stenella coerueloalba and Stenella longisrostris, although low levels of introgressive hybridization may be occurring. Although non-reticulate forms of evolution, such as incomplete lineage sorting, could explain our genetic results, we consider that the genetic and morphological evidence taken together argue more convincingly towards a case of hybrid speciation. We anticipate that our study will bring attention to this important aspect of reticulate evolution in non-model mammal species. The study of speciation through hybridization is an excellent opportunity to understand the mechanisms leading to speciation in the context of gene flow.Ana R AmaralGretchen LovewellMaria M CoelhoGeorge AmatoHoward C RosenbaumPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 1, p e83645 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ana R Amaral Gretchen Lovewell Maria M Coelho George Amato Howard C Rosenbaum Hybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).
description	Natural hybridization may result in the exchange of genetic material between divergent lineages and even the formation of new taxa. Many of the Neo-Darwinian architects argued that, particularly for animal clades, natural hybridization was maladaptive. Recent evidence, however, has falsified this hypothesis, instead indicating that this process may lead to increased biodiversity through the formation of new species. Although such cases of hybrid speciation have been described in plants, fish and insects, they are considered exceptionally rare in mammals. Here we present evidence for a marine mammal, Stenella clymene, arising through natural hybridization. We found phylogenetic discordance between mitochondrial and nuclear markers, which, coupled with a pattern of transgressive segregation seen in the morphometric variation of some characters, support a case of hybrid speciation. S. clymene is currently genetically differentiated from its putative parental species, Stenella coerueloalba and Stenella longisrostris, although low levels of introgressive hybridization may be occurring. Although non-reticulate forms of evolution, such as incomplete lineage sorting, could explain our genetic results, we consider that the genetic and morphological evidence taken together argue more convincingly towards a case of hybrid speciation. We anticipate that our study will bring attention to this important aspect of reticulate evolution in non-model mammal species. The study of speciation through hybridization is an excellent opportunity to understand the mechanisms leading to speciation in the context of gene flow.
format	article
author	Ana R Amaral Gretchen Lovewell Maria M Coelho George Amato Howard C Rosenbaum
author_facet	Ana R Amaral Gretchen Lovewell Maria M Coelho George Amato Howard C Rosenbaum
author_sort	Ana R Amaral
title	Hybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).
title_short	Hybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).
title_full	Hybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).
title_fullStr	Hybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).
title_full_unstemmed	Hybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).
title_sort	hybrid speciation in a marine mammal: the clymene dolphin (stenella clymene).
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/95f42e535de14bbfa246f6c6bb75d1fa
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Hybrid speciation in a marine mammal: the clymene dolphin (Stenella clymene).

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