A lower but still highly significant decrease in the coefficient of variation is found when sperm competitive ability values are extracted from the Snormal distribution: 23.8% ± 2.5 compared to 17.7% ± 2.0, for s 2 values and associated F 2 values respectively (T-test for dependent samples t 9999 = 286.9, p <<0.0001).
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The relative nature of fertilization success: implications for the study of post-copulatory sexual selection.
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