Summary of Mean (± SD) key environmental, technical and biological variables collected during the deployments.

<p><i>n</i>, number or replicates.</p><p>Summary of Mean (± SD) key environmental, technical and biological variables collected during the deployments.</p

Relationship between the hazard ratio (coxph regression model for a mean rater with state of the fish as response variable and the reflex index based on continuous reflex scores; see S13 Table) and the reflex impairment index based on continuous scores for plaice (<i>Pleuronectes platessa</i>) at 17, and 24 cm in total length.

<p>Relationship between the hazard ratio (coxph regression model for a mean rater with state of the fish as response variable and the reflex index based on continuous reflex scores; see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0179092#pone.0179092.s014" target="_blank">S13 Table</a>) and the reflex impairment index based on continuous scores for plaice (<i>Pleuronectes platessa</i>) at 17, and 24 cm in total length.</p

Non-parametric Kaplan–Meier survival probability estimates over days of monitoring of discarded plaice (<i>Pleuronectes platessa</i>) at 0.2 intervals of the reflex index based on categorical scores.

<p>To calculate the reflex index, the three categories were assigned values of 0, 0.66, and 1 for absent, weak, and strong, respectively. (A) mean; (B) rater A; (C) rater B; and (D) rater C.</p

Non-parametric Kaplan–Meier survival probability estimates over 14 days of monitoring of discarded plaice (<i>Pleuronectes platessa</i>) at 0.2 intervals of the reflex index based on scores from the continuous scale.

<p>(A) mean; (B) rater A; (C) rater B; and (D) rater C.</p

Rater (dis)agreement of categorical scores.

<p>(A) Proportion (%) of rater agreement between categorical reflex and injury scores. (B) Disagreement was apportioned into differences between the categories absent and weak (black), strong and weak (light grey) and other differences (such as between the categories absent and strong or every rater appointed another category; dark grey).</p

Cox proportional hazard (coxph) regression model per rater with state of the fish (dead or alive) as response variable and the reflex (R) or reflex & injury (R&I) index as independent variables.

<p>Cox proportional hazard (coxph) regression model per rater with state of the fish (dead or alive) as response variable and the reflex (R) or reflex & injury (R&I) index as independent variables.</p

Significance of variables and their interactions of a generalised linear mixed model (GLMM) based on Wald III Chi-square test results of categorical reflex and injury scores.

<p>Significance of variables and their interactions of a generalised linear mixed model (GLMM) based on Wald III Chi-square test results of categorical reflex and injury scores.</p

List of scoring criteria for categorical reflex responses (i.e., absent, weak, moderate, and strong) of plaice (<i>Pleuronectes platessa</i>) in the order tested within 5 s of observation after stimulus.

<p>List of scoring criteria for categorical reflex responses (i.e., absent, weak, moderate, and strong) of plaice (<i>Pleuronectes platessa</i>) in the order tested within 5 s of observation after stimulus.</p

Summary of technical, environmental, and biological variables (Mean ± SD, where applicable) recorded during four day trips with the RV <i>Simon Stevin</i> in the southern North Sea.

<p>Summary of technical, environmental, and biological variables (Mean ± SD, where applicable) recorded during four day trips with the RV <i>Simon Stevin</i> in the southern North Sea.</p

Each rater’s most parsimonious logistic regression model for survival of European plaice (<i>Pleuronectes platessa</i>), with co-variates: Reflex impairment and injury index based on categorical scores (R&I.cat), and total length (TL).

<p>Each rater’s most parsimonious logistic regression model for survival of European plaice (<i>Pleuronectes platessa</i>), with co-variates: Reflex impairment and injury index based on categorical scores (R&I.cat), and total length (TL).</p