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Intraspecific evolutionary relationships among peregrine falcons in western North American high latitudes

Journal Article · · PLoS ONE
 [1];  [2];  [2];  [2];  [3];  [4];  [5];  [3];  [6];  [7];  [8];  [9];  [10]
  1. US Geological Survey Alaska Science Center, Anchorage, AK (United States); DOE/OSTI
  2. US Geological Survey Alaska Science Center, Anchorage, AK (United States)
  3. US Fish and Wildlife Service, Fairbanks, AK (United States). Fairbanks Fish and Wildlife Field Office
  4. US Fish and Wildlife Service, Homer, AK (United States). Alaska Maritime National Wildlife Refuge
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. National Park Service, Fairbanks, AK (United States). Yukon-Charley River National Preserve and Gates of the Arctic National Park and Preserve
  7. US Fish and Wildlife Service, Juneau, AK (United States). Migratory Bird Management
  8. National Park Service, Anchorage, AK (United States). Alaska Regional Office
  9. Falcon Research Group, Bow, WA (United States)
  10. Brigham Young Univ., Provo, UT (United States). Dept. of Plant and Wildlife Sciences and Monte L. Bean Life Science Museum

Subspecies relationships within the peregrine falcon (Falco peregrinus) have been long debated because of the polytypic nature of melanin-based plumage characteristics used in subspecies designations and potential differentiation of local subpopulations due to philopatry. In North America, understanding the evolutionary relationships among subspecies may have been further complicated by the introduction of captive bred peregrines originating from non-native stock, as part of recovery efforts associated with mid 20th century population declines resulting from organochloride pollution. Alaska hosts all three nominal subspecies of North American peregrine falcons–F. p. tundrius, anatum, and pealei–for which distributions in Alaska are broadly associated with nesting locales within Arctic, boreal, and south coastal maritime habitats, respectively. Unlike elsewhere, populations of peregrine falcon in Alaska were not augmented by captive-bred birds during the late 20th century recovery efforts. Population genetic differentiation analyses of peregrine populations in Alaska, based on sequence data from the mitochondrial DNA control region and fragment data from microsatellite loci, failed to uncover genetic distinction between populations of peregrines occupying Arctic and boreal Alaskan locales. However, the maritime subspecies, pealei, was genetically differentiated from Arctic and boreal populations, and substructured into eastern and western populations. Levels of interpopulational gene flow between anatum and tundrius were generally higher than between pealei and either anatum or tundrius. Estimates based on both marker types revealed gene flow between augmented Canadian populations and unaugmented Alaskan populations. While we make no attempt at formal taxonomic revision, our data suggest that peregrine falcons occupying habitats in Alaska and the North Pacific coast of North America belong to two distinct regional groupings–a coastal grouping (pealei) and a boreal/Arctic grouping (currently anatum and tundrius)– each comprised of discrete populations that are variously intra-regionally connected.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Earth and Environmental Systems Science Division
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1627843
Journal Information:
PLoS ONE, Journal Name: PLoS ONE Journal Issue: 11 Vol. 12; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (1)

Status and trends of circumpolar peregrine falcon and gyrfalcon populations journal December 2019

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