Skip to main content

Table 2 Sperm competition risk but not potential mating rate impacts on ejaculate production

From: Sperm competition risk drives plasticity in seminal fluid composition

Term Paired testes mass Epididymal sperm count Daily sperm production Seminal vesicles mass
  F P F P F P F P
SC 5.81 0.02 8.48 0.007 5.22 0.03 4.37 0.046
MR 0.06 0.81 0.12 0.73 0.09 0.76 0.21 0.65
SC × MR 0.48 0.49 0.32 0.58 1.96 0.17 0.06 0.81
  1. Summary of ANOVAs testing for the effects of sperm competition risk (SC) and potential mating rate (MR) treatments on four ejaculate production parameters: paired testes mass, epididymal sperm count and daily sperm production (all sperm production measures), plus seminal vesicles mass (a measure of seminal fluid production, see Table 1 for details). In all cases, the degrees of freedom for each F test, d.f. = 1,28 except for daily sperm production where one subject was excluded and so d.f. = 1,27.
  2. ANOVA analysis of variance