Table 3 Results of non-linear curve fitting of OCW, CBL, and HBL. The first seven regression equations are regressing natural log OCW, CBL, or HBL (x variables) against natural log body mass (y variable, in g). The last two equations are regressing natural log OCW against natural log CBL and natural log HBL, respectively. All equations are written in the form ln(y) = a × ln(x)^b + c
From: Occipital condyle width (OCW) is a highly accurate predictor of body mass in therian mammals
a | b | C | ||||
|---|---|---|---|---|---|---|
Metric | Value | 95% CI | Value | 95% CI | Value | 95% CI |
OCW | 7.289 | (5.780, 8.800) | 0.688 | (0.578, 0.771) | − 7.724 | (− 9.501, − 5.947) |
OCW (therians only) | 7.470 | (5.958, 8.981) | 0.679 | (0.599,0.760) | − 7.939 | (− 9.709, − 6.168) |
OCW (excluding taxa) | 7.253 | (5.931, 8.575) | 0.694 | (0.621, 0.767) | − 7.767 | (− 9.324, − 6.209) |
OCW (all specimens treated independently) | 6.852 | (6.160, 7.544) | 0.714 | (0.671,0.757) | − 7.235 | (− 8.039, -6.431) |
OCW (average of wild-caught specimens only) | 7.694 | (5.544, 9.843) | 0.663 | (0.551, 0.775) | − 8.154 | (− 10.619, − 5.690) |
CBL | 18.017 | (8.059, 27.975) | 0.435 | (0.288, 0.581) | − 26.885 | (− 38.366, − 15.403) |
HBL | 3.747 | (2.036, 5.457) | 0.918 | (0.759, 1.078) | − 11.883 | (− 15.170, − 8.596) |
OCW versus CBL | 1.001 | (0.768, 1.234) | 1.020 | (0.907, 1.134) | 1.446 | (1.123, 1.770) |
OCW versus HBL | 2.631 | (1.844, 3.418) | 0.652 | (0.536, 0.768) | 0.713 | (− 0.199, 1.626) |