Sperm is a sexual ornament in rose bitterling

0492348 - ÚBO 2019 RIV GB eng J - Článek v odborném periodiku
Smith, Carl - Spence, R. - Reichard, Martin
Sperm is a sexual ornament in rose bitterling.
Journal of Evolutionary Biology. Roč. 31, č. 11 (2018), s. 1610-1622. ISSN 1010-061X. E-ISSN 1420-9101
Grant CEP: GA ČR(CZ) GBP505/12/G112
Institucionální podpora: RVO:68081766
Klíčová slova: ejaculate * mate choice * pheromone * sexual selection * spermatozoa
Obor OECD: Ecology
Impakt faktor: 2.541, rok: 2018

In many taxa, odour cues mediate mating decisions. A key question is what these odours comprise, where they are produced, and what they signal. Using rose bitterling, fish that spawn in the gills of freshwater mussels, we investigated the role of sperm cues on female oviposition decisions using individuals of known MHC genotype. Male bitterling frequently released sperm prior to female oviposition and females responded with an increased probability of oviposition and released a greater number of eggs, particularly if males had a dissimilar MHC genotype. These mating preferences by females were shown to be adaptive, with MHC dissimilarity of males and females correlated positively with embryo survival. These results support a role for indirect benefits to rose bitterling mate choice, and we propose that sperm acts as a releaser pheromone in bitterling, functioning as a sexual ornament signalling male quality as a mate.
Trvalý link: http://hdl.handle.net/11104/0285912


Vědecká data: DRYAD