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Jack off sperm

In a variety of taxa, males deploy alternative reproductive tactics to secure fertilizations. 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. 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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The macho sperm myth

Jack off sperm
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Jack off sperm
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The idea that sperm race to the egg is just another macho myth | Aeon Essays

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Correlation between Sperm “Redundancy” and Chiasma Frequency

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