Table 1.
Average brain region volumes (±standard deviations) and numbers of mitral cells in turkey vultures and black vultures and associated p-values of two sample t-tests of absolute volumes and numbers are shown. The museum catalog numbers of the specimens examined are: USNM647470, USNM647480, USNM647449, USNM647485, USNM647441, USNM647440.
| Measurement | turkey vulture (Cathartes aura) (n = 3) | black vulture (Coragyps atratus) (n = 3) | p |
|---|---|---|---|
| Whole brain volume (mm3) | 9,211.97 ± 203.56 | 11,579.22 ± 753.16 | 0.006 |
| Telencephalon volume (mm3) | 6,154.25 ± 81.16 | 8,113.36 ± 626.07 | 0.006 |
| Optic tectum volume (mm3) | 222.96 ± 20.17 | 219.09 ± 12.63 | 0.79 |
| Nucleus rotundus volume (mm3) | 13.98 ± 1.92 | 15.79 ± 0.31 | 0.21 |
| Entopallium volume (mm3) | 100.25 ± 9.90 | 129.11 ± 7.10 | 0.01 |
| Olfactory bulb volume (mm3) | 224.87 ± 34.92 | 54.28 ± 7.04 | 0.001 |
| Number of mitral cells | 162,565 ± 16,094 | 86,550 ± 10,154 | 0.002 |