Table 2.
Tweedie GLM to predict moray abundance on BRUVS including market gravity
| Factors | Degrees of freedom (DF) | Deviance | Residual DF | Residual deviance | F-value | p value | Deviance explained |
|---|---|---|---|---|---|---|---|
| Null | 66 | 25.25 | |||||
| log10(Gravity) | 1 | 5.01 | 65 | 20.24 | 33.89 | <0.0001 | 0.20 |
| Protection status | 1 | 0.48 | 64 | 19.77 | 3.22 | 0.08 | 0.02 |
| Reef complexity | 1 | 8.56 | 63 | 11.20 | 57.91 | <0.0001 | 0.34 |
| log10(Gravity) ∗ Protection status | 1 | 0.02 | 62 | 11.18 | 0.13 | 0.72 | 0.001 |
| Sum of deviance explained | 0.56 | ||||||
Analysis of deviance table for the Tweedie GLM to determine the effects of key anthropogenic (log-transformed market gravity score, protection status [open or closed to fishing]) and habitat (mean reef complexity score [0–5]) factors on the reef-level occurrence (mean MaxN) of morays on reefs throughout the greater Caribbean (n = 67 reefs). An asterisk denotes the interaction between factors.