Table 2. Table of the forward model selection results with the base phylogeny model and the top models from the model selection process, based on minimum ΔAIC.
| Model | ΔAICa | Log-Likelihood | K |
|---|---|---|---|
| Abundance+Timing+Week+(1|Family/Genus/Species) | 0 | -633.77 | 9 |
| Abundance+Timing+(1|Family/Genus/Species) | 0.6 | -635.03 | 8 |
| Abundance+Timing+Week+Migrant+(1|Family/Genus/Species) | 3.0 | -633.26 | 11 |
| Abundance+Timing+Week+Forage+(1|Family/Genus/Species) | 3.2 | -629.34 | 15 |
| Abundance+Timing+Migrant+(1|Family/Genus/Species) | 3.3 | -634.42 | 10 |
| Abundance+Timing+Forage+(1|Family/Genus/Species) | 3.4 | -630.45 | 14 |
| Abundance+(1|Family/Genus/Species) | 16.2 | -644.83 | 6 |
Model descriptions show the variables used in each model to predict Collisions using a negative binomial regression function. Of the 9 models calculated in the analysis, only the models which had ΔAIC<9.0, are shown, in addition to the starting model of Abundance + (1|Family/Genus/Species). The model with the lowest AIC was Abundance+Timing+Week+(1|Family/Genus/Species). The model Abundance+Timing+(1|Family/Genus/Species) was highly competitive. K represents the number of parameters in each model.
aΔAIC calculated based on minimum AIC value amongst all models. Minimum AIC value was 1285.5 for the model Abundance+Timing+Week+(1|Family/Genus/Species).