Fig. 3. Seasonal changes in energy intake of (A) an adult male, (B) a pregnant/lactating female, (C) a juvenile, and (D) a pup harp seal. The solid line shows the seasonal changes in GEI from the detailed model. The upper dotted line shows estimated energy requirements using the simple energy model, where M is the annual maximum body mass. The lower dashed line shows estimated energy requirements using the minimum annual body mass.