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Radar surveys are becoming a standard method for estimating Marbled Murrelet populations and determining the importance of watersheds for murrelets along coastal B.C. and the Pacific Northwest. Marine surveillance radar was used to inventory murrelet populations at both coastal and inland sites on northern Vancouver Island. This project is part of a multi-level management program for TFL 37 that also includes reconnaissance and site-specific habitat assessments, dawn audio-visual surveys and long-term habitat conservation. The radar component of the project is designed to monitor long-term population trends at the landscape level as part of a program to evaluate the effectiveness of the habitat conservation strategy. In 2003 we had a total of 6,462 radar detections from morning and evening surveys at 19 locations. Tilting the radar scanner allowed more murrelets to be detected, which could be useful for monitoring populations where lower numbers are detectable.
Harper, William L., Schroeder, Bernard K.. 2004. Long-term radar monitoring of marbled murrelet populations in the Nimpkish Valley, Vancouver Island: 2003 progress report. Forest Investment Account (FIA) - Forest Science Program. Forest Investment Account Report. FIA2004MR007
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