Figure 4. Partial fits for the general additive model (GAM) of sea turtle bycatch with area (“dat”) and depth as covariates, showing the relationship estimated by a smoothing spline. Curves explain the effect of each variable on sea turtle bycatch per dredge hour. ‘Out’ indicates outside the Hudson Canyon Access Area (HCAA), and ‘Cas’ indicates inside the HCAA. Areas outside the HCAA, and depths between 54 and 70 m, have a higher than average bycatch rate.