Length-weight relationship of European smelt (Osmerus eperlanus) larvae (0–14 days post hatch (dph), n = 157). In panel A, the overall relationship of larvae is shown. Red data points indicate individuals shown in panel B that depicts larval development between 0 and 14 dph. Panel C shows the transition from endo- to exogenous feeding and the relative number of larvae with prey items in the gut across time. Panel D shows the relationship of age and the number of dead larvae removed per aquarium. In panels A, C and D the medians, from the model's posterior distributions, are shown as the regression line and the shaded areas show the 0.5 and 0.8 quantile-based credible intervals.