Figure 6

Age-frequency distribution of geochemical changepoints for Pacific bluefin tuna detected using otolith Mg:Ca, Mg:Ca, and Sr:Ba. Estimated changepoint age of each individual was based on average from all three markers.
Age-frequency distribution of geochemical changepoints for Pacific bluefin tuna detected using otolith Mg:Ca, Mg:Ca, and Sr:Ba. Estimated changepoint age of each individual was based on average from all three markers.