Table 5.
Bottleneck results (p-values) for the 605 Gyps coprotheres grouped by geographic region and for only the 266 Gyps coprotheres collected at the six breeding colonies.
| Wilcoxon test | Wilcoxon test | Sign test | Mode-shift | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| One tailed for Hx | One tailed for Hd | SMM | TPM | |||||||
| SMM | TPM | SMM | TPM | Hd: Hx | p-value | Hd: Hx | p-value | |||
| Region N = 605 | Western | 0.984 | 0.984 | 0.042 | 0.042 | 6:4 | 0.218 | 6:4 | 0.221 | No |
| Middle | 1.000 | 1.000 | 0.000 | 0.000 | 13:0 | 0.000 | 13:0 | 0.000 | No | |
| Northern | 1.000 | 1.000 | 0.000 | 0.000 | 13:0 | 0.000 | 12:1 | 0.000 | No | |
| All regions | 1.000 | 1.000 | 0.001 | 0.000 | 13:0 | 0.000 | 12:1 | 0.000 | No | |
| Colony N = 266 | Potberg | 0.984 | 0.984 | 0.042 | 0.042 | 6:4 | 0.210 | 6:4 | 0.213 | No |
| Collywobbles | 0.995 | 0.958 | 0.006 | 0.051 | 9:2 | 0.011 | 8:3 | 0.049 | No | |
| Msikaba | 0.991 | 0.920 | 0.012 | 0.097 | 7:3 | 0.066 | 7:3 | 0.075 | No | |
| Umzimkulu | 0.958 | 0.861 | 0.051 | 0.160 | 7:4 | 0.187 | 6:5 | 0.410 | No | |
| Skeerpoort | 0.884 | 0.813 | 0.138 | 0.216 | 7:3 | 0.081 | 6:4 | 0.230 | No | |
| Kransberg | 0.997 | 0.958 | 0.005 | 0.051 | 9:2 | 0.011 | 8:3 | 0.051 | No | |
| All colonies | 0.999 | 0.993 | 0.000 | 0.017 | 11:1 | 0.001 | 8:4 | 0.089 | No | |
Two mutation models were used the stepwise mutation model (SMM) and the two-phase mutation model (TPM; using 90% SMM). Wilcoxon signed ranked tests for heterozygous excess (one tailed Hx) and heterozygous deficiency (one tailed Hd), a sign test and the Mode-shift test for bottleneck detection. Significant p-values are in bold and have been adjusted using the Bonferroni correction (p-value = 0.003).