Table 3.

Comparisons of fitness components in within- and between-line crosses (excluding crosses where no eggs where produced).

Trait	Within-line	Between-line	F – tests of equality of means
Lifetime egg production	23.73 (1.53)	23.05 (0.4)	F1,946 = 0.17, P = 0.67
Lifetime offspring production	16.07 (1.48)	19.9 (0.4)	F1,950 = 5.93, P = 0.015
Egg-to-adult survival (%)	62.01 (0.03)	79.75 (0.01)	F1,946 = 30.97, P < 0.001
F1 productivity	16.97 (0.82)	31.82 (0.25)	F1,2903 = 209, P < 0.001

Given are mean (SE) and F – tests of equality of means.