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Fig. 3. Field running speed of males after being held in the laboratory in either
the presence or absence of two females. Data are least square means
(±s.e.m.) of running speed for the three predominant phosphoglucose
isomerase (PGI) genotypes, reported as a function of mating treatment (open
bars, no female, N=37, 48, 4; striped bars, two females,
N=39, 32, 14).