Table 2
Linear mixed-effect model of protein carbonyl z-scores in response to size class and associated degrees of freedom (d.f.), estimates, and standard errors (s.e.). The intercept was set to size class = small, maturity stage = immature, and survey = EVHOE 2020.
| Term | d.f. | χ² | P-value | Fixed effects | Estimate | s.e. |
|---|---|---|---|---|---|---|
| Final model | ||||||
| Intercept | −0.213 | 0.163 | ||||
| Size class | 1 | 8.678 | 0.003 | Large | 0.533 | 0.181 |
| Dropped terms | ||||||
| Maturity stage | 1 | 0.000 | 0.999 | Mature | −0.0002 | 0.227 |
| Survey | 4 | 0.563 | 0.967 | EVHOE 2021 | −0.207 | 0.473 |
| PELGAS 2021 | −0.084 | 0.455 | ||||
| PELGAS 2022 | 0.132 | 0.477 | ||||
| PELGAS 2023 | 0.031 | 0.471 | ||||
| Size class:Maturity stage | 1 | 1.010 | 0.315 | Large:Mature | 0.386 | 0.384 |
| Size class:Survey | 4 | 1.210 | 0.877 | Large:EVHOE 2021 | −0.259 | 0.629 |
| Large:PELGAS 2021 | 0.243 | 0.770 | ||||
| Large:PELGAS 2022 | −0.030 | 0.747 | ||||
| Large:PELGAS 2023 | −0.434 | 0.772 | ||||
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