| Title: | Sperm is a sexual ornament in rose bitterling |
| Author(s): | Smith C; Spence R; Reichard M; |
| Address: | "Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno, Czech Republic. Department of Ecology and Vertebrate Zoology, University of Lodz, Lodz, Poland. School of Biology and Bell-Pettigrew Museum of Natural History, University of St. Andrews, St. Andrews, UK. School of Psychology and Neuroscience, University of St. Andrews, St. Andrews, UK" |
| ISSN/ISBN: | 1420-9101 (Electronic) 1010-061X (Linking) |
| Abstract: | "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" |
| Keywords: | "Animals Cypriniformes/*genetics/*physiology Female Gene Expression Regulation Major Histocompatibility Complex/genetics Male *Mating Preference, Animal Spermatozoa/*physiology ejaculate mate choice pheromone sexual selection spermatozoa;Neuroscience;" |
| Notes: | "MedlineSmith, Carl Spence, Rowena Reichard, Martin eng Research Support, Non-U.S. Gov't Switzerland 2018/08/02 J Evol Biol. 2018 Nov; 31(11):1610-1622. doi: 10.1111/jeb.13357. Epub 2018 Aug 17" |
