Table 6. Bottleneck results implemented with three different tests for kea including P-values for a signed rank Wilcoxon test for heterozygous excess (one tail) with different models of mutations, the shifted mode test and the M-ratio method.

For the heterozygous excess, TPM and SMM correspond to two-phase mutation model and single-step mutation model respectively. For the M-ratio method, p_s stands for the proportion of sing-step mutations, M_C for the critical M for a given theta where θ = 1 represents the initial (pre-decline) N_e of 500 and θ = 10 an N_e of 5000. M-ratio values that fall below the M_C value are considered statistically significant at α = 0.05.

Test	Parameter		North n = 142	Central n = 181	South n = 87	Historical Canterbury n = 15
He excess	TPM (90% SMM)		0.09	0.02	0.08	0.60
	TPM (95% SMM)		0.11	0.05	0.17	0.62
	SMM		0.18	0.14	0.36	0.74
Shifted Mode			No	No	No	No
M-Ratio	ps = 0.9	Δg = 3.5
	θ = 1; Ne = 500	Mc	0.81	0.81	0.81	0.79
	θ = 10; Ne = 5000	Mc	0.75	0.76	0.74	0.65
		M-Ratio	0.76	0.79	0.86	0.83
	ps = 0.78	Δg = 3.5
	θ = 1; Ne = 500	Mc	0.71	0.71	0.71	0.69
	θ = 10; Ne = 5000	Mc	0.70	0.71	0.68	0.56
		M-Ratio	0.76	0.79	0.86	0.83