Can a ‘wintering area effect’ explain population status of Swainson's hawks? A stable isotope approach.
| Autor: | Sarasola, José Hernán1 sarasola@exactas.unlpam.edu.ar, Negro, Juan José1, Hobson, Keith A.2, Bortolotti, Gary R.3, Bildstein, Keith L.4 |
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| Zdroj: | Diversity & Distributions. Jul2008, Vol. 14 Issue 4, p686-691. 6p. 1 Chart, 1 Graph, 1 Map. |
| Databáze: | Academic Search Ultimate |
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