Table 1.
Model statistics for the logistic regression model between carnivory (0–1) and the logarithm of body mass (M; g) for Pleistocene mammals. The general model P(M) = et/(1 + et) plus a Binomial error was fitted. bkp refers to break point estimated from segmented regression.
| model | structure | parameter values (s.e.) | ΔAIC |
|---|---|---|---|
| linear | t = b0 + b1 − M | b0 = 0.36 (1.1); b1 = −0.15 (0.1) | 12 |
| quadratic | t = b0 + b1 − M + b2M2 | b0 = −19.3 (8.1)*; b1 = 4.1 (1.7)*; b2 = −0.22 (0.09)* | 1.6 |
| segmented |
t = b0 + b1
M if M < bkp
t = b2 + b3 M if M ≥ bkp |
b0 = −18.3 (11.1); b1 = 5.8 (3.4)*
b2 = 8.7; b3 = −0.78 (0.3)*; bkp = 8.23 (0.5)* |
0 |
*p < 0.05.