Fig. 2 Digital photograph of sagitta otoliths showing the measurements (dimensions) analysed in this study: dim1: otolith length, dim2: otolith width, and dim3: otolith height. The larger sagitta otolith is from a female G. ogac (28 cm TL) from Quaqortoq, West Greenland. The smaller otolith is from a G. morhua (9 cm TL) from Bellevue, Canada. Magnification: 0.5 x 1.0 x 1.0. 1 mm corresponds to 62 pixels