TABLE 1.

Summary of sperm competition phenotypes

Phenotype	Mean across lines	Range of line means	d.f.	Test statistic
Defense
P1′	0.41	0.004–0.79	94,1269	F = 13.0***
Fecundity-D	79.6	48–107	94,1267	F = 1.7***
Refractoriness	0.13	0–0.5	95 lines	χ2 = 16.5, permutation***
Offense
P2′	0.91	0.49–1.0	94,1142	F = 4.7***
Fecundity-O	86.9	55–140	94,1142	F = 1.7***
Remating	0.78	0.1–1.0	95 lines	χ2 = 47.2, permutation***

In defense tests, the experimental male was the first male to mate. P1′ is the proportion of offspring sired by the first male. Fecundity-D is the total fecundity of doubly mated females in the defense test. Refractoriness is the proportion of females that did not remate. In offense tests, the experimental male was the second male to mate. P2′ is the proportion of offspring sired by the second male. Fecundity-O is the total fecundity of doubly mated females in the offense test. Remating is the proportion of females that remated. *P < 0.05, **P < 0.01, ***P < 0.001 based on ANOVA or permutation tests (see text).