Figure 1
From: Highly variable sperm precedence in the stalk-eyed fly, Teleopsis dalmanni
The distribution of second male sperm precedence (P2) among 22 dam-sire pair families in the stalk-eyed fly, Teleopsis dalmanni. Open bars depict the frequency of families with P2 significantly different from 0.5 (using 2-tailed binomial tests); black bars denote those with P2 not significantly different from 0.5. The grey bar denotes the sperm precedence of a single family where the observed P2 of zero was not significantly different from P2 = 0.5. However, the brood size of this family was small (n = 5), so this result should be treated with caution.