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. 2007 May 1;362(1487):1947–1958. doi: 10.1098/rstb.2007.2080

Table 1.

Individual male and female speeds (in mm s−1), relative male–female speed (in mm s−1) and the cosine of the angle between male and female displacements, averaged over time periods 1, 2, 3, and 4. (Means±s.d. are indicated.)

SM (mm s−1) SF (mm s−1) SMF (mm s−1) cos ψMF
period 1: 0–9 s 4.2714±4.6772 4.0065±6.3264 5.7553±6.9859 0.1339±0.7851
period 2: 9–30 s 2.9792±4.3580 3.6673±5.2168 3.5551±4.8273 0.3888±0.7004
period 3: 30—31 s 10.9790±14.7235 11.5800±15.5865 7.6552±7.0972 0.4118±0.5633
period 4: 31–44 s 3.3382±4.8723 4.7092±7.4492 5.7558±7.6063 0.1750±0.7082