Sperm precedence of wild isolate male sperm in competition with reference strain PD4790. (A) Early fecundity for each replicate double-mating (first 18 hours following the second mating), shown cumulatively for the reference strain and the wild isolate. (B) The fraction of offspring sired by wild isolate males when mated to females first (P1) or second (P2), for early and late time periods. (C) Late fecundity for each replicate double-mating (any offspring laid after the first 18 hours) periods post-mating. Early versus late sperm precedence was statistically tested by paired t-test (AB1, CB4855, CB4856: **, P < 0.0001; JU440: *, P < 0.05; all other pairs not significant).
Murray et al. BMC Evolutionary Biology 2011 11:99 doi:10.1186/1471-2148-11-99