Figure
3.5: GAM smooth functions of solar elevation angle showing the
contribution of this variable to variations in capelin probability of
occurrence (upper panels) and density (lower panels) from acoustics
(left panels) and demersal trawl (right panels). The y-axis shows the
(centred) linear predictor of the models, i.e., the logit probability
of capelin occurrence in the upper panels and the log density of
capelin in the lower panels, as a function of solar elevation angle
when accounting for the other covariate effects. The horizontal line
at y = 0 represents a neutral contribution of the covariate to the
response, and the grey bands represent ± 2 standard errors around
the smooth estimate. The dashes along the x-axis show the
distribution of covariate values in the raw data.
