Please use this identifier to cite or link to this item: http://hdl.handle.net/10125/67644

Geographic variation and genetic structure in the Bahama Oriole (Icterus northropi), a critically endangered synanthropic species

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Title:Geographic variation and genetic structure in the Bahama Oriole (Icterus northropi), a critically endangered synanthropic species
Authors:Price, Melissa
Person, Carl
Hayes, William
Date Issued:26 Nov 2015
Citation:Price et al. (2015), Geographic variation and genetic structure in the Bahama Oriole (Icterus northropi), a critically endangered synanthropic species. PeerJ 3:e1421; DOI 10.7717/peerj.1421
Abstract:Bird species may exhibit unexpected population structuring over small distances, with gene flow restricted by geographic features such as water or mountains. The Bahama Oriole (Icterus northropi) is a critically endangered, synanthropic island endemic with a declining population of fewer than 300 individuals. It now remains only on Andros Island (The Bahamas), which is riddled with waterways that past studies assumed did not hinder gene flow. We examined 1,858 base pairs of mitochondrial DNA sequenced from four gene regions in 14 birds (roughly 5% of the remaining population) found on the largest land masses of Andros Island (North Andros andMangrove Cay/South Andros).We sought to discern genetic structuring between the remaining subpopulations and its relationship to current conservation concerns. Four unique haplotypes were identified, with only one shared between the two subpopulations. Nucleotide and haplotype diversity were higher for the North Andros subpopulation than for the Mangrove Cay/South Andros subpopulation. Analysis of molecular variance (AMOVA) yielded aWright’s fixation index (Fst) of 0.60 (PFst = 0.016), with 40.2% of the molecular variation explained by withinpopulation differences and 59.8% by among-population differences. Based on the mitochondrial regions examined in this study, we suggest the extant subpopulations of Bahama Oriole exhibit significant population structuring over short distances, consistent with some other non-migratory tropical songbird species.
Pages/Duration:15
URI:http://hdl.handle.net/10125/67644
DOI:10.7717/peerj.1421
Rights:CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/
Journal:PeerJ
Appears in Collections: Hawaii Wildlife Ecology Lab


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