[en] Adult Pacific herring collected from Prince William Sound waters in 1992, three years after the Exxon Valdez oil spill were examined for evidence of abnormalities, especially in the area of reproductive success and histopathology. Results indicated that the sample population exhibited a lower hatching percentage and produced fewer morphologically normal larvae than fish from a previously unoiled site. Differences in microscopic tissue lesions also have been observed, but considered only marginally significant. Macrophage aggregates in the spleen, liver and kidney were greater in fish from previously oiled sites, especially in males, however, these elevated scores were attributed to age rather than exposure to the oil spill. Splenic granulomatous inflammation and severe congestion were interpreted as good bioindicators for abnormal larval progeny. The overall conclusion was that although histopathological damage did not provide conclusive evidence, the decreased reproductive success of fish from oiled sites suggested that the site's oiling history contributed to reproductive impairment. 21 refs., 3 tabs., 1 fig