Presence of dolphin bycatch by individual factors.

*Trawl duration was estimated using a reduced dataset (AIC not directly comparable).
Results from binary logistic generalised linear models to predict the presence of dolphin bycatch in trawl nets by individual factors, based on skippers' logbook data and independent observer data (skippers' logbook number of trawls, n = 27,914; independent observer, n = 4,178, except for the predictor trawl duration, where logbook n = 27,489 and observer n = 4,153). df = degrees of freedom. Net type (separate) = analysis of three net types (No BRD, BRD, BRD forward). Net type (pooled) = analysis of two net types (data for BRD and BRD forward pooled).