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Table 2 Comparison of Cox regression models that include and do not include the effect of water temperature
| Tagging component | Parameter estimates | SE | df | χ 2 | P | |
|---|---|---|---|---|---|---|
| Model A | ||||||
| Tag presence (Implantation or Untagged) | Implantation | 1.148 | 0.421 | 1 | 8.277 | 0.004* |
| Water temperature condition (warm or cold) | Warm | 2.044 | 0.723 | 1 | 10.550 | 0.001* |
| Duration of tag deployments (s) | −0.007 | 0.006 | 1 | 1.781 | 0.182 | |
| Duration of anaesthesia (s) | 0.003 | 0.003 | 1 | 1.544 | 0.214 | |
| Body mass (g) | −0.003 | 0.004 | 1 | 0.632 | 0.426 | |
| Model B | ||||||
| Tag presence (Implantation or untagged) | Implantation | 0.304 | 0.291 | 1 | 1.128 | 0.288 |
| Duration of tag deployments (s) | 0.004 | 0.004 | 1 | 1.332 | 0.248 | |
| Duration of anaesthesia (s) | −0.004 | 0.002 | 1 | 7.509 | 0.006* | |
| Body mass (g) | −0.005 | 0.004 | 1 | 1.451 | 0.228 | |
