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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
The origin of finches on Tristan da Cunha and Gough Island, central South Atlantic ocean
Molecular Phylogenetics and Evolution, Volume 69, No. 1, Year 2013
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Description
The Nesospiza finches of the Tristan da Cunha archipelago and Rowettia goughensis from Gough Island, 380. km distant, are both derived from tanager-finches (Thraupidae) that colonized the islands by crossing more than 3000. km of ocean from South America. Sequences from two mitochondrial and four nuclear genes indicate that the Patagonian bridled finches Melanodera are the closest relatives of the South Atlantic finches. Melanodera typically was sister to Rowettia, although some genes linked it more closely to Nesospiza. There was no evidence that Rowettia and Nesospiza are sister taxa, suggesting that the South Atlantic finches evolved from separate colonization events, as apparently was the case for moorhens Gallinula spp. at the two island groups. Genetic divergence between the two island finch genera thus provides an estimate of the maximum period of time they have been present at the islands, some 3-5 million years. A brief review of colonization histories suggests that island hopping by passerine birds is infrequent among islands more than 100-200. km apart. © 2013 Elsevier Inc.
Authors & Co-Authors
Ryan, Peter G.
South Africa, Cape Town
University of Cape Town
Klicka, Luke B.
United States, San Diego
San Diego State University
Keith Barker, F.
United States, Minneapolis
University of Minnesota Twin Cities
Burns, Kevin J.
United States, San Diego
San Diego State University
Statistics
Citations: 17
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1016/j.ympev.2013.05.026
ISSN:
10557903
e-ISSN:
10959513
Research Areas
Cancer
Genetics And Genomics