Concentrations of PCB (polychlorinated biphenyls, a class of industrial chemicals), DDE (the primary breakdown product of the pesticide DDT), and

Studies on birds and marine mammals from around the world indicate that environmental contaminants have adversely affected wildlife. This is

Aerial surveys were conducted off Oregon and Washington in the summer of 1991 to help determine the current abundance of

Gray whale (Eschrichtius robustus) populations in the eastern North Pacific have increased at an annual rate of close to 3%

Harbor porpoise abundance estimates have been made for Washington and Oregon using aerial and vessel surveys (Barlow 1988, Barlow et al. 1988,