Table 2.

Multinomial Logistic Models for Number of Offspring per Mating

	β	Log Likelihood	LR Statistica	df	Pb
Model 1: Full-Sib Avoidance
full sib	−0.44	−497.90	7.69	1	0.02c (one tailed)
Model 2: MHC Sharing
one MHC haplotype	−0.12	−499.24	5.02	2	0.25
both MHC haplotypes	−0.49
Model 3: MUP Sharing
one MUP haplotype	0.11	−500.59	2.33	2	0.52
both MUP haplotypes	−0.34

Summary of observed and expected frequencies for each category shown in Table S2.

^aCompared to null model (log likelihood = −501.75).

^bProbabilities calculated by random permutation of data (n = 10,000).

^cModel 1 would also be significant at p < 0.05 in a two-tailed test.