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  운영자 2006-05-09 13:38:04 | Hit : 30602 | Vote : 8812
Subject   [자료] Assortative mating as a mechanism for rapid evolution of a migratory divide.
Science. 2005 Oct 21;310(5747):502-4. Related Articles, Links  

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Science. 2005 Oct 21;310(5747):419.

Assortative mating as a mechanism for rapid evolution of a migratory divide.

Bearhop S, Fiedler W, Furness RW, Votier SC, Waldron S, Newton J, Bowen GJ, Berthold P, Farnsworth K.

School of Biology and Biochemistry, Medical Biological Centre, Lisburn Road, Queen's University Belfast, Belfast BT6 7BL, UK. s.bearhop@qub.ac.uk

There have been numerous recent observations of changes in the behavior and dynamics of migratory bird populations, but the plasticity of the migratory trait and our inability to track small animals over large distances have hindered investigation of the mechanisms behind migratory change. We used habitat-specific stable isotope signatures to show that recently evolved allopatric wintering populations of European blackcaps Sylvia atricapilla pair assortatively on their sympatric breeding grounds. Birds wintering further north also produce larger clutches and fledge more young. These findings describe an important process in the evolution of migratory divides, new migration routes, and wintering quarters. Temporal segregation of breeding is a way in which subpopulations of vertebrates may become isolated in sympatry.

PMID: 16239479 [PubMed - indexed for MEDLINE]

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