Fig. 8. Plots of decision surfaces for selected additive models. The probability of correct classification for linear (lda) and quadratic (qda) discrimination are given in the corner of each panel. As there are differences in the results obtained between the Greenland (A, B) and Canadian (C, D) material, decision surfaces from several models are shown. The left side of the figure (A, C) shows linear decision surfaces when only otolith length (dim1) and otolith height (dim3) are included in an additive model for the Greenland and Canadian material (model 15). The decision surfaces shown on the right side of the figure (B, D) are when fish length and one otolith dimension are included.