Table 4. Results of bat regression analyses.
The regression expressions are: log(dependent variable) = slope × log(independent variable) + intercept.
| Order or family | Regression type | Independent variable | Dependent variable | Slope | Intercept | R 2 | Number samples |
|---|---|---|---|---|---|---|---|
| All bats | PI(0.93) | Length (mm) | Mass (g) | 2.6668 | −3.3211 | 0.8507 | 176 |
| AVG | Length (mm) | Mass (g) | 2.7718 | −3.3628 | 0.9924 | NA | |
| Megachiroptera | PI(0.33) | Length (mm) | Mass (g) | 2.8628 | −3.4933 | 0.9749 | 40 |
| AVG | Length (mm) | Mass (g) | 2.7335 | −3.2632 | 0.9978 | NA | |
| Microchiroptera | PI(0.93) | Length (mm) | Mass (g) | 2.515 | −3.1025 | 0.7522 | 136 |
| AVG | Length (mm) | Mass (g) | 2.5292 | −2.9844 | 0.9928 | NA | |
| Heavy bats | PI(0.79) | Length (mm) | Mass (g) | 2.7595 | −3.3252 | 0.922 | 86 |
| AVG | Length (mm) | Mass (g) | 2.7233 | −3.2329 | 0.9937 | NA | |
| Light bats | PI(0.0) | Length (mm) | Mass (g) | 3.28 | −4.4926 | 0.8781 | 29 |
| AVG | Length (mm) | Mass (g) | 2.9878 | −3.9552 | 0.9743 | NA | |
| All bats | PI(0.83) | Mass (g) | BMR (watts) | 0.8111 | −1.9063 | 0.8784 | 84 |
| Megachiroptera | PI(0.56) | Mass (g) | BMR (watts) | 0.8581 | −2.0161 | 0.9279 | 21 |
| Microchiroptera | PI(1.07) | Mass (g) | BMR (watts) | 0.7459 | −1.8247 | 0.991 | 63 |
| Heavy bats | PI(0.89) | Mass (g) | BMR (watts) | 0.8225 | −1.9166 | 0.8887 | 51 |
| Light Batsa | PI(0.0) | Mass (g) | BMR (watts) | 0.7015 | −1.8048 | 0.8154 | 17 |
Notes.
a
Data available for only 4 of the 8 families comprising light bats.
PI(n) means the phylogenetic informed regression method using BayesTraits and the number in parentheses is the estimated value of lambda. AVG means the cohort averaging regression method. Length (mm) is forearm length in millimeters. Mass (g) is body mass in grams. NA means Not Applicable.