Table 2 Zero inflated negative binomial model outputs for capture rates of (a) wolverine, (b) American marten and (c) short-tailed weasel. Table values include regression coefficients estimate (\(\beta\)), exponentiated regression coefficients (exp(\(\beta\))) that represent the odds ratio, standard deviation (SD) and p-value (significance level = 0.05, indicated with ‘*’).
(a) ZINB Model M3: Wolverine Zero-inflation model coefficients (binomial with logit link) | Estimate | Exp (\(\beta\)) | SE | p |
|---|---|---|---|---|
(Intercept) | 1.521 | 4.577 | 0.341 | < 0.001* |
Marten | − 0.582 | 0.559 | 0.265 | 0.015* |
Weasel | − 0.218 | 0.804 | 0.365 | 0.115 |
Lynx | − 9.439 | 7.96 e−05 | 82.918 | 0.909 |
Landcover (open) | 0.070 | 1.072 | 0.309 | 0.765 |
Snow depth | − 0.011 | 0.989 | 0.004 | < 0.001* |
Count model coefficients (negative binomial with log link) | ||||
(Intercept) | 1.554 | 4.730 | 0.273 | < 0.001* |
Marten (CR) | 0.010 | 1.010 | 0.004 | 0.028* |
Weasel (CR) | 0.190 | 1.210 | 0.120 | 0.550 |
Lynx (CR) | − 0.119 | 0.888 | 0.055 | 0.030* |
Landcover (open) | 0.072 | 1.075 | 0.243 | 0.822 |
Snow depth | − 0.009 | 0.991 | 0.002 | 0.001* |
(b) ZINB Model M3: Marten Zero-inflation model coefficients (binomial with logit link) | Estimate | Exp (\(\beta\)) | SE | p |
|---|---|---|---|---|
(Intercept) | 1.898 | 6.673 | 0.341 | < 0.001* |
Wolverine | − 0.504 | 0.604 | 0.253 | 0.047* |
Weasel | 0.275 | 1.317 | 0.324 | 0.396 |
Lynx | 0.964 | 2.622 | 0.502 | 0.055 |
Landcover (open) | − 1.526 | 0.217 | 0.406 | < 0.001* |
Snow depth | − 0.032 | 0.968 | 0.004 | < 0.001* |
Count model coefficients (negative binomial with log link) | ||||
(Intercept) | 2.183 | 8.873 | 0.154 | < 0.001* |
Wolverine (CR) | 0.020 | 1.020 | 0.014 | 0.148 |
Weasel (CR) | − 0.037 | 0.964 | 0.049 | 0.449 |
Lynx (CR) | − 0.137 | 0.872 | 0.056 | 0.013* |
Landcover (open) | − 0.163 | 0.850 | 0.126 | 0.195 |
Snow depth | 0.008 | 1.008 | 0.001 | < 0.001* |
(c) GLM-NB M3: Weasel | Estimate | Exp (\(\beta\)) | SE | p |
|---|---|---|---|---|
(Intercept) | 3.295 | 27.0 | 0.622 | 1.18 e−07* |
Wolverine | 0.031 | 1.03 | 0.042 | 0.463 |
Marten | − 0.059 | 1.06 | 0.018 | 9.59 e−4* |
Lynx | 0.022 | 1.02 | 0.033 | 0.510 |
Landcover (open) | 0.165 | 1.18 | 0.390 | 0.673 |
Snow depth | − 0.061 | 0.94 | 0.010 | 2.92 e−09* |