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A review of the effects of station placement and observer bias in detections of marbled murrelets in forest standsAuthor(s): Brian P. O’Donnel
Source: In: Ralph, C. John; Hunt, George L., Jr.; Raphael, Martin G.; Piatt, John F., Technical Editors. 1995. Ecology and conservation of the Marbled Murrelet. Gen. Tech. Rep. PSW-GTR-152. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 139-140
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
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DescriptionA variety of factors influence the results of surveys conducted for Marbled Murrelets (Brachyramphus marmoratus) in the forest. In this paper we examine observer variability and survey station placement as factors influencing murrelet survey data. A training and evaluation protocol (Ralph and others 1993) was developed to insure high field abilities and comparability of data among and between observers. Site characteristics which may limit the hearing and sighting of murrelets (e.g., wind, road, or stream noise, visual obstructions) can largely be controlled through the sensible placement of survey stations.
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CitationO’Donnel, Brian P. 1995. A review of the effects of station placement and observer bias in detections of marbled murrelets in forest stands. In: Ralph, C. John; Hunt, George L., Jr.; Raphael, Martin G.; Piatt, John F., technical editors. Ecology and conservation of the Marbled Murrelet. Gen. Tech. Rep. PSW-GTR-152. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture: 139-140.
- Northwest Forest Plan—the first 10 years (1994-2003): status and trends of populations and nesting habitat for the marbled murrelet.
- Chapter 33: Offshore Population Estimates of Marbled Murrelets in California
- Chapter 10: Marbled Murrelet Inland Patterns of Activity: Defining Detections and Behavior
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