Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female

Abstract In Calopteryx damselflies, males remove rivals’ sperm stored by the female, thereby reducing sperm competition. This behaviour may create a sexual conflict, because females could lose the sperm stored in the spermatheca, used for long-term storage. Comparative evidence suggested antagonisti...

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Autor principal:	Adolfo Cordero-Rivera
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a4488752158e4adf833e785133db3e4a
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spelling	oai:doaj.org-article:a4488752158e4adf833e785133db3e4a2021-12-02T12:30:12ZSexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female10.1038/s41598-017-08390-32045-2322https://doaj.org/article/a4488752158e4adf833e785133db3e4a2017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08390-3https://doaj.org/toc/2045-2322Abstract In Calopteryx damselflies, males remove rivals’ sperm stored by the female, thereby reducing sperm competition. This behaviour may create a sexual conflict, because females could lose the sperm stored in the spermatheca, used for long-term storage. Comparative evidence suggested antagonistic coevolution between sexes, which might prompt the evolution of narrow spermathecal ducts, or longer spermathecae, hindering sperm removal. Calopteryx haemorrhoidalis and C. splendens coexist and sometimes hybridize. Therefore, here I predicted that if females coevolve with conspecific males, heterospecific males should have an advantage when interspecific matings occur because females will show less resistance to them than to conspecific males. By hand-pairing females to males of both species, I found that in intraspecific and interspecific matings, sperm was almost completely removed from the bursa (97–100%), but only partially from the spermathecae, with more spermathecal removal in interspecific (63–71%) than intraspecific matings (14–33%). This suggests that heterospecific males are more efficient in sperm removal as predicted by a sexually-antagonistic coevolutionary scenario. Furthermore, in most cases, only the left spermatheca was emptied, suggesting that the evolution of more than one spermatheca might also be a female counter-adaptation to regain control over fertilization.Adolfo Cordero-RiveraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Adolfo Cordero-Rivera Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female
description	Abstract In Calopteryx damselflies, males remove rivals’ sperm stored by the female, thereby reducing sperm competition. This behaviour may create a sexual conflict, because females could lose the sperm stored in the spermatheca, used for long-term storage. Comparative evidence suggested antagonistic coevolution between sexes, which might prompt the evolution of narrow spermathecal ducts, or longer spermathecae, hindering sperm removal. Calopteryx haemorrhoidalis and C. splendens coexist and sometimes hybridize. Therefore, here I predicted that if females coevolve with conspecific males, heterospecific males should have an advantage when interspecific matings occur because females will show less resistance to them than to conspecific males. By hand-pairing females to males of both species, I found that in intraspecific and interspecific matings, sperm was almost completely removed from the bursa (97–100%), but only partially from the spermathecae, with more spermathecal removal in interspecific (63–71%) than intraspecific matings (14–33%). This suggests that heterospecific males are more efficient in sperm removal as predicted by a sexually-antagonistic coevolutionary scenario. Furthermore, in most cases, only the left spermatheca was emptied, suggesting that the evolution of more than one spermatheca might also be a female counter-adaptation to regain control over fertilization.
format	article
author	Adolfo Cordero-Rivera
author_facet	Adolfo Cordero-Rivera
author_sort	Adolfo Cordero-Rivera
title	Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female
title_short	Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female
title_full	Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female
title_fullStr	Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female
title_full_unstemmed	Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female
title_sort	sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a4488752158e4adf833e785133db3e4a
work_keys_str_mv	AT adolfocorderorivera sexualconflictandtheevolutionofgenitaliamaledamselfliesremovemorespermwhenmatingwithaheterospecificfemale
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Sexual conflict and the evolution of genitalia: male damselflies remove more sperm when mating with a heterospecific female

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