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Entree


Sperm length variation is linked to sexual ornamentation in male paper wasps

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Autor(es):
de Souza, Andre R. ; Santos, Eduardo F. ; Baptista, Camila F. ; Dias, Glenda ; Nascimento, Fabio S. ; Lino-Neto, Jose
Número total de Autores: 6
Tipo de documento: Artigo Científico
Fonte: ETHOLOGY ECOLOGY & EVOLUTION; v. N/A, p. 10-pg., 2022-09-26.
Resumo

Diversification of sperm design is a common feature in animals. Considerable intra-individual variation has been detected even in species whose males produce a monomorphic sperm. The evolutionary forces that shape the variation in the gross morphology of these gametic cells are still not completely understood. Previous studies suggest that the intra-individual variation in sperm size reduces as a result of post-copulatory sexual selection. To our knowledge, for the first time, we provide evidence here that pre-copulatory sexual selection can also play a role. By studying the Neotropical paper wasp, Polistes simillimus, a monandrous species, we found reduced variation in sperm length in males bearing sexual ornamentation preferred by females. Besides, the female spermatheca contains a less variable sperm compared to that in the male seminal vesicles. Thus, the scope of selection, acting on this sperm trait, seems broader than previously acknowledged. (AU)

Processo FAPESP: 20/06632-2 - Fauna de Thynninae Neotropical: distribuição e novos dados morfológicos e moleculares para a taxonomia do grupo
Beneficiário:Eduardo Fernando dos Santos
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 20/14464-2 - Seleção sexual em vespas sociais neotropicais
Beneficiário:André Rodrigues de Souza
Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores