Table 1
Comparison between GAMM with single smooth effect (SSE) vs. GAMM with multiple smooth effect (MSE) on year using catchment for each taxon. * indicates the best model. Scores are fREML scores. EDF: estimated degree of freedom. Diff.: difference between scores of the models. DF: difference between EDF of the models. AIC diff.: difference in the Akaike Information Criterion (AIC) between models. ** indicates the model with the lowest AIC. P = probability of χ 2 test.
| Taxon | Model | Scores | EDF | Diff. | DF | AIC diff. | P |
|---|---|---|---|---|---|---|---|
| Alosa sp. | MSE* | 535.2175 | 37 | 88.141 | 22 | 174.62** | <0.001 |
| SSE | 623.3582 | 15 | |||||
| Anguilla anguilla | MSE* | 967.3409 | 43 | 39.396 | 26 | 71.05** | <0.001 |
| SSE | 1006.7365 | 17 | |||||
| Petromyzon marinus | MSE* | 601.3856 | 31 | 53.061 | 18 | 92.43** | <0.001 |
| SSE | 654.4463 | 13 | |||||
| Salmo salar | MSE* | 675.3592 | 46 | 35.140 | 28 | 85.47** | <0.001 |
| SSE | 710.4989 | 18 | |||||
| Salmo trutta | MSE* | 593.0208 | 46 | 80.553 | 28 | 171.83** | <0.001 |
| SSE | 673.5735 | 18 |
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