TABLE 3 .

Group sizes and genetic parameters used in the simulations

	Variance		Genetic parameters
Group size	Environmental	Associative effect	σ2D	σDA	σ2A	σ2E
4	Large	Large	72	−49	122	18
4	Large	Small	70	−9	7.5	18
4	Small	Large	72	−49	122	170
4	Small	Small	70	−9	7.5	170
16	Large	Large	72	−49	122	18
16	Large	Small	70	−9	7.5	18
16	Small	Large	72	−49	122	170
16	Small	Small	70	−9	7.5	170