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Detection of Passive Integrated Transponder (PIT) tags on piscivorous bird colonies in the Columbia River Basin, 2000
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2002
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Description:In 2000, we modified passive integrated transponder tag (PIT tag) equipment previously used in water to detect PIT tags deposited on land by piscivorous birds after they consume juvenile salmonids. Along with researchers throughout the Columbia River Basin, we adapted all equipment to work with thel34.2-kHz PIT tag approved by the International Organization for Standardization. Three techniques were used: manual sifting, an automated flat-plate antenna dragged over the surface of bird colonies with a four-wheel-drive vehicle, and a hand-held, pole-mounted antenna passed over smaller nesting areas that were inaccessible to the vehicle.
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Rights Information:CC0 Public Domain
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Compliance:Library
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