Traversing a Boreal Forest Landscape: Summer Movements of Tule Greater White-fronted Geese
| Autor: | Dirk V. Derksen, Jerry W. Hupp, Daniel R. Yparraguirre, Thomas C. Rothe, Craig R. Ely, John Y. Takekawa, Karen S. Bollinger, Michael J. Petrula, D.L. Orthmeyer, John Terenzi |
|---|---|
| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Waterbirds. 29:43-55 |
| ISSN: | 1938-5390 1524-4695 |
| Popis: | We monitored the movement, distribution and site affinities of radio-marked Tule Greater White-fronted Geese (Anser albifrons elgasi) during spring and summer in Alaska, 1994-1997 and 2004. Our assessment of summer movements was comprehensive, as locations were obtained during prenesting, nesting, and molt for over 90% of geese with active radios captured during winter or the previous summer in Alaska. Geese arrived to coastal and interior marshes in the Cook Inlet Basin (CIB) from mid April to early May, after which they moved to nesting areas in the upper CIB. Nesting birds used coastal staging areas in close proximity to eventual nest site location. Molting sites included a sub-glacial lake system in the upper CIB, although up to 50% of geese underwent a molt migration to wetlands across the Alaska Range, 400-600 km west of the CIB. Geese that molted at distant sites returned to the CIB before autumn migration. Length of stay in the CIB varied among years from 108-119 days, and averaged 116 da... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|