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- W2097339701 abstract "Models of fertilization kinetics rely upon estimates of the swimming velocity of sperm to predict collision rates between egg and sperm. Most investigators measure sperm swimming velocity without accounting for the helical motion of sperm, thereby obtaining an inflated estimate of the velocity with which sperm approach eggs. In turn, models of fertilization predict inflated rates of sperm/egg collision. I observed sea urchin sperm colliding with eggs, quantified the rate of sperm/egg collision, and measured sperm velocity as a component of the helix through which they swim. I also adjusted the target size of eggs to reflect the diameter of the helix. My estimate of sperm swimming velocity is an order of magnitude lower than other estimates for the same species. By using helical parameters in fertilization kinetics models and accounting for dead sperm in laboratory trials, I was able to accurately predict lower rates of sperm/egg collision. Moreover, making these adjustments in the model increased the estimated proportion of sperm that initiate fertilization by 6- to 7-fold, suggesting that a better understanding of sperm swimming might lead to a more complete understanding of fertilization biology and natural selection on gamete traits." @default.
- W2097339701 created "2016-06-24" @default.
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- W2097339701 date "2002-08-01" @default.
- W2097339701 modified "2023-09-24" @default.
- W2097339701 title "Helical Nature of Sperm Swimming Affects the Fit of Fertilization-Kinetics Models to Empirical Data" @default.
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- W2097339701 doi "https://doi.org/10.2307/1543457" @default.
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