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The Avian MigrantThe Biology of Bird Migration$
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John Rappole

Print publication date: 2013

Print ISBN-13: 9780231146784

Published to Columbia Scholarship Online: November 2015

DOI: 10.7312/columbia/9780231146784.001.0001

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Evolution and Biogeography

Evolution and Biogeography

(p.231) Chapter 8 Evolution and Biogeography
The Avian Migrant

John H. Rappole

Columbia University Press

This chapter focuses on the evolution and biogeography of avian migrants. Theories on the origin of migration are generally assigned to one of two categories: “northern home” and “southern home.” This chapter proposes an alternative theory for the origin of migration through dispersal that only requires intraspecific competition for breeding space and a new, reachable environment where competition is less or absent and probabilities of survival and/or reproduction are greater than at the site of origin. It first considers exaptations versus adaptations for migration, along with the genetics of migration, rapid development of bird migration, and migrant population differentiation. It then examines the link between ornithogeography and migration patterns and concludes by providing an overview of the world's principal migration systems.

Keywords:   evolution, biogeography, avian migrants, dispersal, exaptations, adaptations, genetics, bird migration, population differentiation, ornithogeography

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