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Variation in apical hook length reflects the intensity of sperm competition in murine rodents
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SYSNO ASEP 0394025 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Variation in apical hook length reflects the intensity of sperm competition in murine rodents Author(s) Šandera, M. (CZ)
Albrecht, Tomáš (UBO-W) RID, SAI, ORCID
Stopka, P. (CZ)Number of authors 3 Source Title PLoS ONE. - : Public Library of Science - ISSN 1932-6203
Roč. 8, č. 7 (2013), e68427Number of pages 5 s. Language eng - English Country US - United States Keywords postcopulatory sexual selection ; field mice Apodemus ; female promiscuity ; acrosome reaction ; Passerine birds ; Muroid rodents ; genus Apodemus ; cytochrome-b ; testes size ; house mice Subject RIV EG - Zoology Institutional support UBO-W - RVO:68081766 UT WOS 000321733000004 EID SCOPUS 84879753962 DOI 10.1371/journal.pone.0068427 Annotation Background: Post-copulatory sexual selection has been shown to shape morphology of male gametes. Both directional and stabilizing selection on sperm phenotype have been documented in vertebrates in response to sexual promiscuity. Methodology: Here we investigated the degree of variance in apical hook length and tail length in six taxa of murine rodents. Conclusions: Tail sperm length and apical hook length were positively associated with relative testis mass, our proxy for levels of sperm competition, thus indicating directional post-copulatory selection on sperm phenotypes. Moreover, our study shows that increased levels of sperm competition lead to the reduction of variance in the hook length, indicating stabilizing selection. Hence, the higher risk of sperm competition affects increasing hook length together with decreasing variance in the hook length. Species-specific post-copulatory sexual selection likely optimizes sperm morphology. Workplace Institute of Vertebrate Biology Contact Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Year of Publishing 2014
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