Alaska Swan Database 1968-2015 ...
In the 1960s, US Fish and Wildlife Service (USFWS) Alaska Region Migratory Bird Management (MBM-AK) developed a protocol for aerial Trumpeter Swan (Cygnus buccinator) and Tundra Swan (C. columbianus) abundance surveys in Alaska that was used by several government agencies and private entities throug...
| Main Authors: | , , , |
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| Format: | Dataset |
| Language: | unknown |
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U.S. Fish and Wildlife Service
2023
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| Online Access: | https://dx.doi.org/10.7944/p9wqqs3m https://www.sciencebase.gov/catalog/item/646e79ded34e4e58932cf5f1 |
| Summary: | In the 1960s, US Fish and Wildlife Service (USFWS) Alaska Region Migratory Bird Management (MBM-AK) developed a protocol for aerial Trumpeter Swan (Cygnus buccinator) and Tundra Swan (C. columbianus) abundance surveys in Alaska that was used by several government agencies and private entities through 2015. This standardized survey protocol allowed data collected by these diverse organizations to be stored together in a common digital archival system called the Alaska Swan Database, which is maintained by MBM-AK. Contributions to the database ranged from relatively small, localized surveys to the statewide quinquennial Alaska Trumpeter Swan Survey. Survey timing was either the spring nesting period or late summer before cygnets fledged. A sample unit consisted of one entire USGS 1:63,360 topographic map, or a complete one-quarter block of a 1:63,360 map. A quarter block consisted of the NW, NE, SE, or SW quadrant of a map. Swan observations were recorded as a single adult, adult pair, single with nest (spring ... |
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