Table 3.
Model of apparent survival probability (Φ) over the winter of 2004/2005 and apparent encounter probability (P), showing number of parameters (No. Par), degrees of freedom (df) and Akaike Information Criterion (AIC)
| No. | Model | Description | No. Par | df | AIC |
|---|---|---|---|---|---|
| 1 | ΦP | Φ & P are same between sites and same between size classes | 2 | 10 | 4845.6 |
| 4 | ΦsiteP | Φ varies according to site | 3 | 9 | 4632.0 |
| 2 | ΦPsite | P varies according to site | 3 | 9 | 4647.2 |
| 3 | ΦsitePsite | Φ & P vary according to site | 4 | 8 | 4628.8 |
| 5 | Φsite,sizeP | Φ varies according to site & size class | 5 | 7 | 4624.0 |
| 6 | ΦPsite,size | P varies according to size and site | 5 | 7 | 4636.2 |
| 7 | Φsite,sizePsite,size | Φ & P vary according to site and size class | 8 | 5 | 4622.5 |
| 8 | Φsite,size(Ice-free)Psite | Φ varies according to size class in ice-free site | 5 | 7 | 4620.8 |
| Φ varies according to site | |||||
| P varies according to site |