Evidence of changes in populations of the Marbled Murrelet in the Pacific Northwest

Abstract

The Marbled Murrelet (Brachyramphus marmoratus) occurs along the coasts of the North Pacific. It is unique among the Alcidae in its tree nesting habits. Recent research has revealed that in forested areas it is closely associated with old-growth coniferous forests, most of which have been harvested over the past 100 years. All historical accounts, although fragmentary, indicate a previously higher population of the bird throughout its North American range. Several reasons for the decline have been advanced, including habitat removal, mortality due to capture in fishing nets, and increased predation during nesting. The current population is estimated at about 360,000 birds.

Citation

Ralph, C. John. 1994. Evidence of changes in populations of the Marbled Murrelet in the Pacific Northwest. Studies in Avian Biology 15:286-292