Fig. 7. Effects of fluid shear on sperm–egg encounter rate. Encounter rate is described as a function of log-shear, using least squares-regression to identify the best fits (live sperm, abalone eggs: y=1.29–0.56log₁₀(x), r²=0.82, F_1,68=86.6, P<0.001; live sperm, brine shrimp eggs: y=0.55–0.16log₁₀(x), r²=0.67, F_1,42=72.1, P<0.001; dead sperm, abalone eggs: y=0.22–0.29log₁₀(x), r²=0.16, F_1,35=10.4, P<0.01). Each symbol is a mean ± s.e.m.; error bars are smaller than symbol sizes in some cases.