Fig. 5

a Seasonal mortality rates for Prince William Sound Pacific herring based on weekly time periods. Mortality rates in the Sound (\(1-S_{j}^{4}\)) are denoted in red. Mortality rates in the Gulf (\(1-S_{j}^{8}\)) are denoted in blue. Mortality was higher during the spring and summer season (April-August) than the fall and winter season (September-March) in both the Sound and the Gulf. b Mortality rates for Pacific herring tagged in 2017 and 2018 during the initial months following the tagging procedure