Marbled murrelet abundance and reproductive indices in Oregon during 2002 : annual report to the Oregon Dept. of Fish and Wildlife and the U.S. Fish and Wildlife Service

摘要

"The Marbled Murrelet (Brachyramphus marmoratus) is a small diving seabird of the Alcid family which is on the Federally Threatened Species list, and is state listed as endangered or threatened in California, Oregon, and Washington (Nelson, 1997). Because their nests are dispersed and difficult to locate high in trees of mature coastal forests, most research on overall abundance andudreproductive output is conducted at sea, where the birds are concentrated within a few km of shore on the open coast . . . This report summarizes population estimation and productivity indices obtained in the 2002udseason and compares these data with earlier research in Oregon." (from the Introduction)