ArticleEcology and evolution2013
Sneaker "jack" males outcompete dominant "hooknose" males under sperm competition in Chinook salmon (Oncorhynchus tshawytscha).
Article in Ecology and evolution, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.
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Who cites it
14 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.
- Male alternative reproductive tactics and sperm competition: a meta-analysis.Biological reviews of the Cambridge Philosophical Society · 2022Pooled it
- Heritability and genomic basis of age-at-maturity in Chinook Salmon.The Journal of heredity · 2025Article
- Patterns of sperm swimming behaviour depend on male mating tactic and spawning environment in chinook salmon.Scientific reports · 2024Article
- Can cryptic female choice prevent invasive hybridization in external fertilizing fish?Evolutionary applications · 2023Article
- Evaluating the evolutionary mechanisms maintaining alternative mating strategies in a simulated bull trout (Ecology and evolution · 2023Article
- Reproductive success of jack and full-size males in a wild coho salmon population.Royal Society open science · 2023Article
- Coevolution of female fidelity and male help in populations with alternative reproductive tactics.Proceedings. Biological sciences · 2021Article
- Y-chromosome haplotypes are associated with variation in size and age at maturity in male Chinook salmon.Evolutionary applications · 2020Article
- Experimental manipulation of reproductive tactics in Seba's short-tailed bats: consequences on sperm quality and oxidative status.Current zoology · 2019Article
- Recruitment variation disrupts the stability of alternative life histories in an exploited salmon population.Evolutionary applications · 2019Article
- Egg chemoattractants moderate intraspecific sperm competition.Evolution letters · 2017Article
- A preference to bond? Male prairie voles form pair bonds even in the presence of multiple receptive females.Animal behaviour · 2016Article
- Male Investments in High Quality Sperm Improve Fertilization Success, but May Have Negative Impact on Offspring Fitness in Whitefish.PloS one · 2015Article
- Extrapair mating and the strength of sexual selection: insights from a polymorphic species.Behavioral ecology : official journal of the International Society for Behavioral EcologyArticle
Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In a variety of taxa, males deploy alternative reproductive tactics to secure fertilizations. In many species, small "sneaker" males attempt to steal fertilizations while avoiding encounters with larger, more aggressive, dominant males. Sneaker males usually face a number of disadvantages, including reduced access to females and the higher likelihood that upon ejaculation, their sperm face competition from other males. Nevertheless, sneaker males represent an evolutionarily stable strategy under a wide range of conditions. Game theory suggests that sneaker males compensate for these disadvantages by investing disproportionately in spermatogenesis, by producing more sperm per unit body mass (the "fair raffle") and/or by producing higher quality sperm (the "loaded raffle"). Here, we test these models by competing sperm from sneaker "jack" males against sperm from dominant "hooknose" males in Chinook salmon. Using two complementary approaches, we reject the fair raffle in favor of the loaded raffle and estimate that jack males were ∼1.35 times as likely as hooknose males to fertilize eggs under controlled competitive conditions. Interestingly, the direction and magnitude of this skew in paternity shifted according to individual female egg donors, suggesting cryptic female choice could moderate the outcomes of sperm competition in this externally fertilizing species.
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