Density And Porductivity of Bald Eagles In Prince William Sound, Alaska, After The Exxon Valdez Oil Spill

摘要

Helicopter surveys were conducted in Prince William Sound(PWS) to assess the effects of the 1989 Exxon Valdez oil spill on teh reproductive sucess and densities of bald eagles(Haliaeetus leucocephalus) one and two years after the spill(1990 and 1991). Densities of bald eagles were compared between an oiled area in southwestern PWS and an unoiled area in northern PWS. In all surveys (four in 1990, one in 1991) densities of eagles in the oiled area generally were similar to or higher than were unoiled. In 1990, all measures of nest productivity, nest ocupancy, and nesting succcess were similar between oiled and unoiled territories.