Figure 5. Profile of plasma sex steroids (E2, 17,20β-DHP) in female sockeye salmon.

Profiles at in-river migration are displayed for uninjured fish to provide a reference for the natural progression of sex steroids at migration and maturation stages (top panel, open circles). Profiles at spawning streams are displayed according to severity of disentanglement injury, including uninjured fish (open circles), fish with minor injuries (light gray circles), and fish with moderate-to-severe injuries (dark gray circles). The symbol area represents the relative value of plasma cortisol, such that large symbols reflect elevated cortisol.