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Relative fitness data for population Ara-1 through generation 2,000

The following table gives the summary data on fitness relative to the ancestor used by Lenski and Travisano (1994) in their Fig. 5. These data illustrated the punctuated, step-like trajectory for a population's mean fitness when viewed at a fine-scale of resolution.

Measurements were obtained for the Ara-1 population at 100-generation intervals. Each entry below is the mean from ten replicate assays, followed by the corresponding standard deviation. These data were obtained as part of an experiment run in temporal blocks; each generation was included in each block. Therefore, any block effects should not influence the relative value of the means, because all samples experienced the same set of blocks.

Gen.
Mean
St. Dev.
0 1.01158 0.03787
100 1.02179 0.03488
200 1.06045 0.02365
300 1.13491 0.07488
400 1.13866 0.04137
500 1.14132 0.05405
600 1.18885 0.07802
700 1.21264 0.07383
800 1.22917 0.07147
900 1.22609 0.06804
1000 1.19707 0.06759
1100 1.21384 0.05459
1200 1.24055 0.05481
1300 1.29675 0.07846
1400 1.32527 0.08198
1500 1.31703 0.09372
1600 1.29434 0.07121
1700 1.24681 0.05064
1800 1.29164 0.08676
1900 1.32016 0.08034
2000 1.28608 0.10269

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