Pacific Northwest Research Station

Title: Regional population monitoring of the marbled murrelet: field and analytical methods.

Author: Raphael, Martin G.; Baldwin, Jim; Falxa, Gary A.; Huff, Mark H.; Lance, Monique; Miller, Sherri L.; Pearson, Scott F.; Ralph, C. John; Strong, Craig; Thompson, Chris.

Date: 2007

Source: Gen. Tech. Rep. PNW-GTR-716. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 70 p

Station ID: GTR-PNW-716

Description: The marbled murrelet (Brachyramphus marmoratus) ranges from Alaska to California and is listed under the Endangered Species Act as a threatened species in Washington, Oregon, and California. Marbled murrelet recovery depends, in large part, on conservation and restoration of breeding habitat on federally managed lands. A major objective of the Northwest Forest Plan (the Plan) is to conserve and restore nesting habitat that will sustain a viable marbled murrelet population. Under the Plan, monitoring is an essential component and is designed to help managers understand the degree to which the Plan is meeting this objective. This report describes methods used to assess the status and trend of marbled murrelet populations under the Plan.

Keywords: Brachyramphus marmoratus, distance sampling, line transect, marbled murrelet, Northwest Forest Plan, population monitoring

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Citation

Raphael, Martin G.; Baldwin, Jim; Falxa, Gary A.; Huff, Mark H.; Lance, Monique; Miller, Sherri L.; Pearson, Scott F.; Ralph, C. John; Strong, Craig; Thompson, Chris.  2007.  Regional population monitoring of the marbled murrelet: field and analytical methods..   Gen. Tech. Rep. PNW-GTR-716. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 70 p.