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• W4384201219 abstract "Polyandrous mating systems result in females mating with multiple males, generating opportunities for strong pre-mating and post-mating sexual selection. Polyandry also creates the potential for unintended matings and subsequent sperm competition with hybridizing species. Cryptic female choice allows females to bias paternity towards preferred males under sperm competition and may include conspecific sperm preference when under hybridization risk. The potential for hybridization becomes particularly important in context of invasive species that can novelly hybridize with natives, and by definition, have evolved allopatrically. We provide the first examination of conspecific sperm preference in a system of three species with the potential to hybridize: North American native Atlantic salmon (Salmo salar) and brook char (Salvelinus fontinalis), and invasive brown trout (Salmo trutta) from Europe. Using naturalized populations on the island of Newfoundland, we measured changes in sperm swimming performance, a known predictor of paternity, to determine the degree of modification in sperm swimming to female cues related to conspecific sperm preference. Compared to water alone, female ovarian fluid in general had a pronounced effect and changed sperm motility (by a mean of 53%) and swimming velocity (mean 30%), but not linearity (mean 6%). However, patterns in the degree of modification suggest there is no conspecific sperm preference in the North American populations. Furthermore, female cues from both native species tended to boost the sperm of invasive males more than their own. We conclude that cryptic female choice via ovarian fluid mediated sperm swimming modification is too weak in this system to prevent invasive hybridization and is likely insufficient to promote or maintain reproductive isolation between the native North American species." @default.
• W4384201219 created "2023-07-14" @default.
• W4384201219 creator A5063999202 @default.
• W4384201219 creator A5089941798 @default.
• W4384201219 date "2023-07-13" @default.
• W4384201219 modified "2023-09-26" @default.
• W4384201219 title "Can cryptic female choice prevent invasive hybridization in external fertilizing fish?" @default.
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• W4384201219 doi "https://doi.org/10.1111/eva.13573" @default.
• W4384201219 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37622094" @default.
• W4384201219 hasPublicationYear "2023" @default.
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