Premating barriers in young sympatric snail species

Abstract Sympatric coexistence of recently diverged species raises the question of barriers restricting the gene flow between them. Reproductive isolation may be implemented at several levels, and the weakening of some, e.g. premating, barriers may require the strengthening of the others, e.g. postc...

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Autores principales:	Arina L. Maltseva, Marina A. Varfolomeeva, Arseniy A. Lobov, Polina O. Tikanova, Egor A. Repkin, Irina Y. Babkina, Marina Panova, Natalia A. Mikhailova, Andrei I. Granovitch
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1a05ac512bb547e4a897bcc55f6b9d7d
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spelling	oai:doaj.org-article:1a05ac512bb547e4a897bcc55f6b9d7d2021-12-02T13:20:04ZPremating barriers in young sympatric snail species10.1038/s41598-021-84407-22045-2322https://doaj.org/article/1a05ac512bb547e4a897bcc55f6b9d7d2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84407-2https://doaj.org/toc/2045-2322Abstract Sympatric coexistence of recently diverged species raises the question of barriers restricting the gene flow between them. Reproductive isolation may be implemented at several levels, and the weakening of some, e.g. premating, barriers may require the strengthening of the others, e.g. postcopulatory ones. We analysed mating patterns and shell size of mates in recently diverged closely related species of the subgenus Littorina Neritrema (Littorinidae, Caenogastropoda) in order to assess the role of premating reproductive barriers between them. We compared mating frequencies observed in the wild with those expected based on relative densities using partial canonical correspondence analysis. We introduced the fidelity index (FI) to estimate the relative accuracy of mating with conspecific females and precopulatory isolation index (IPC) to characterize the strength of premating barriers. The species under study, with the exception of L. arcana, clearly demonstrated preferential mating with conspecifics. According to FI and IPC, L. fabalis and L. compressa appeared reliably isolated from their closest relatives within Neritrema. Individuals of these two species tend to be smaller than those of the others, highlighting the importance of shell size changes in gastropod species divergence. L. arcana males were often found in pairs with L. saxatilis females, and no interspecific size differences were revealed in this sibling species pair. We discuss the lack of discriminative mate choice in the sympatric populations of L. arcana and L. saxatilis, and possible additional mechanisms restricting gene flow between them.Arina L. MaltsevaMarina A. VarfolomeevaArseniy A. LobovPolina O. TikanovaEgor A. RepkinIrina Y. BabkinaMarina PanovaNatalia A. MikhailovaAndrei I. GranovitchNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Arina L. Maltseva Marina A. Varfolomeeva Arseniy A. Lobov Polina O. Tikanova Egor A. Repkin Irina Y. Babkina Marina Panova Natalia A. Mikhailova Andrei I. Granovitch Premating barriers in young sympatric snail species
description	Abstract Sympatric coexistence of recently diverged species raises the question of barriers restricting the gene flow between them. Reproductive isolation may be implemented at several levels, and the weakening of some, e.g. premating, barriers may require the strengthening of the others, e.g. postcopulatory ones. We analysed mating patterns and shell size of mates in recently diverged closely related species of the subgenus Littorina Neritrema (Littorinidae, Caenogastropoda) in order to assess the role of premating reproductive barriers between them. We compared mating frequencies observed in the wild with those expected based on relative densities using partial canonical correspondence analysis. We introduced the fidelity index (FI) to estimate the relative accuracy of mating with conspecific females and precopulatory isolation index (IPC) to characterize the strength of premating barriers. The species under study, with the exception of L. arcana, clearly demonstrated preferential mating with conspecifics. According to FI and IPC, L. fabalis and L. compressa appeared reliably isolated from their closest relatives within Neritrema. Individuals of these two species tend to be smaller than those of the others, highlighting the importance of shell size changes in gastropod species divergence. L. arcana males were often found in pairs with L. saxatilis females, and no interspecific size differences were revealed in this sibling species pair. We discuss the lack of discriminative mate choice in the sympatric populations of L. arcana and L. saxatilis, and possible additional mechanisms restricting gene flow between them.
format	article
author	Arina L. Maltseva Marina A. Varfolomeeva Arseniy A. Lobov Polina O. Tikanova Egor A. Repkin Irina Y. Babkina Marina Panova Natalia A. Mikhailova Andrei I. Granovitch
author_facet	Arina L. Maltseva Marina A. Varfolomeeva Arseniy A. Lobov Polina O. Tikanova Egor A. Repkin Irina Y. Babkina Marina Panova Natalia A. Mikhailova Andrei I. Granovitch
author_sort	Arina L. Maltseva
title	Premating barriers in young sympatric snail species
title_short	Premating barriers in young sympatric snail species
title_full	Premating barriers in young sympatric snail species
title_fullStr	Premating barriers in young sympatric snail species
title_full_unstemmed	Premating barriers in young sympatric snail species
title_sort	premating barriers in young sympatric snail species
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1a05ac512bb547e4a897bcc55f6b9d7d
work_keys_str_mv	AT arinalmaltseva prematingbarriersinyoungsympatricsnailspecies AT marinaavarfolomeeva prematingbarriersinyoungsympatricsnailspecies AT arseniyalobov prematingbarriersinyoungsympatricsnailspecies AT polinaotikanova prematingbarriersinyoungsympatricsnailspecies AT egorarepkin prematingbarriersinyoungsympatricsnailspecies AT irinaybabkina prematingbarriersinyoungsympatricsnailspecies AT marinapanova prematingbarriersinyoungsympatricsnailspecies AT nataliaamikhailova prematingbarriersinyoungsympatricsnailspecies AT andreiigranovitch prematingbarriersinyoungsympatricsnailspecies
_version_	1718393196017352704

Premating barriers in young sympatric snail species

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