Estimates of GAMs for the effects on vertebral counts and the monthly spawning dynamics in terms of the proportion of pre-, post- and spawning herring.

Modeled means together with each covariate’s degrees of freedom (Ref.df, explaining the oscillations of the modeled trend, where 1 would be linear) and p-value for each area, and the deviance explained (R2) by the model, are shown. For temperature and salinity, estimates were given before the variables were dropped from the model.