Studies of reproductive maturity among age cohorts of Pacific Herring (Clupea pallasii) in Prince William Sound, Alaska, 2017-2019, EVOS Herring Program

These data are part of the Herring Research and Monitoring Program of the Exxon Valdez Oil Spill Trustee Council, which is a multi-faceted study to determine why herring populations in Prince William Sound (PWS) remain depressed since the early 1990s. The information contained in this dataset includes various measurements on the body weight and size; sex; age; gonad maturity including gonad weight, and gonadosomatic and hjort indices; histological information of the ovary including number of post-ovulatory follicles, number of post-ovulatory eggs, inflammation, gonadal macrophage aggregates, follicular atresia, and hyalinized vessel walls; and annual scale growth measurements of adult Pacific Herring (Clupea pallasii, hereafter herring) collected throughout Prince William Sound, Alaska between 2017-2019.