Table 1.

Genetic variability in AR and TW laboratory populations

Regime	Population	Generation	na	nAb	Hexpc
AR...........	AR1	3	29.3	12.6	0.816
	AR2	3	28.9	13.2	0.831
	AR3	3	29.5	13.7	0.829
	AR1	14	29.5	9.9	0.804
	AR2	14	29.5	10.2	0.807
	AR3	14	28.8	11.0	0.812
	AR1	40	29.4	8.9	0.779
	AR2	40	29.6	8.1	0.773
	AR3	40	29.1	8.9	0.790
TW...........	TW1	3	28.5	13.6	0.835
	TW2	3	28.8	14.0	0.838
	TW3	3	29.4	14.0	0.828
	TW1	14	29.2	10.1	0.791
	TW2	14	29.9	10.6	0.812
	TW3	14	29.5	10.2	0.760
	TW1	40	29.3	9.0	0.738
	TW2	40	29.8	9.5	0.753
	TW3	40	29.9	8.2	0.764

^a Mean number of individuals analyzed per locus.

^b Mean allele number per locus.

^c Expected mean heterozygosity.