Model comparison with the full model (Table 4) for predicting dolphin bycatch by fitting multiple predictors for a) skippers' logbook data and b) independent observer data.

Model comparison compares the full model (from Table 4) with the reduced model to indicate the significance of the additional predictors from a) skippers' logbook data (number of trawls, n = 27,914) and b) observer data (n = 4,178).