Table 2
Multiple linear regression models of mean density and percentage of occurrence of Pyrenean sculpin Cottus hispaniolensis based on habitat and biotic variables (see text). Models were created with stepwise multiple regressions (Adj. = adjusted; RMSE = residual mean square error). The significance level for inclusion of predictor variables was 0.05.
Metric | Model | Variable | Coefficient | P | |
---|---|---|---|---|---|
Adj. R2 | RMSE | ||||
Density | 0.78 | 0.44 | Intercept | −8.178 | 0.0002 |
Boulders | 0.140 | <0.0001 | |||
Cobble | 0.123 | 0.0006 | |||
Sand | 0.056 | 0.0149 | |||
Presence | 0.72 | 16.30 | Intercept | −281.870 | 0.0003 |
Boulders | 4.412 | <0.0001 | |||
Cobble | 4.581 | 0.0006 | |||
Sand | 2.178 | 0.0023 |
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