Table 1.

Genetic diversity measures for each population evolving under Full Care (FC) and No Care (NC) for each block. Delta is the difference between FC and NC populations computed separately for each block (*p < .05, **p < .001).

	Block	Evolving population		Δ (FC − NC)	χ2	p-valuea
		FC	NC
Watterson’s θ	1	0.00790	0.00772	1.85e-04	31.48	2.015e-08**
	2	0.00745	0.00734	1.17e-04	75.61	<2.2e-16**
π	1	0.00769	0.00768	1e-05	1.53	.215
	2	0.00772	0.00750	0.00022	132.42	2.2e-16**
πN/πS (all genes)	1	0.0124	0	0.0124	46.81	7.82e-12**
	2	0.0108	0	0.0108	83.05	<2.2e-16**
πN/πS (diverged genes)	1	0.0244	0	0.0244	4.29	.038*
	2	0.0229	0	0.0229	11.23	.001**

^aNonparametric Kruskal–Wallis rank sum test, df = 1.