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Titolo:
Genetic structure of the world's polar bear populations
Autore:
Paetkau, D; Amstrup, SC; Born, EW; Calvert, W; Derocher, AE; Garner, GW; Messier, F; Stirling, I; Taylor, MK; Wiig, O; Strobeck, C;
Indirizzi:
Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2E9, Canada Univ Alberta Edmonton AB Canada T6G 2E9 Sci, Edmonton, AB T6G 2E9, Canada USGS, Biol Resource Div, Anchorage, AK 99503 USA USGS Anchorage AK USA 99503 S, Biol Resource Div, Anchorage, AK 99503 USA Natl Environm Res Inst, Greenland Inst Nat Resources, Dept Arct Environm, DK-2200 Copenhagen, Denmark Natl Environm Res Inst Copenhagen Denmark DK-2200 00 Copenhagen, Denmark Canadian Wildlife Serv, Edmonton, AB T6H 3S5, Canada Canadian Wildlife Serv Edmonton AB Canada T6H 3S5 ton, AB T6H 3S5, Canada Norwegian Polar Inst, N-9296 Tromso, Norway Norwegian Polar Inst Tromso Norway N-9296 ar Inst, N-9296 Tromso, Norway Univ Saskatchewan, Dept Biol, Saskatoon, SK S7N 5E2, Canada Univ Saskatchewan Saskatoon SK Canada S7N 5E2 skatoon, SK S7N 5E2, Canada Govt NW Terr, DRWED, Iqaluit, NT X0A 0H0, Canada Govt NW Terr Iqaluit NT Canada X0A 0H0 DRWED, Iqaluit, NT X0A 0H0, Canada Univ Oslo, Zool Museum, N-0562 Oslo, Norway Univ Oslo Oslo Norway N-0562Univ Oslo, Zool Museum, N-0562 Oslo, Norway
Titolo Testata:
MOLECULAR ECOLOGY
fascicolo: 10, volume: 8, anno: 1999,
pagine: 1571 - 1584
SICI:
0962-1083(199910)8:10<1571:GSOTWP>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
URSUS-MARITIMUS; MICROSATELLITE ANALYSIS; MITOCHONDRIAL-DNA; BEAUFORT SEA; GREENLAND; DIFFERENTIATION; DISTANCE; MARKERS; AREA; CONSERVATION;
Keywords:
microsatellite; polar bear; population structure; sea ice; Ursus maritimus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Paetkau, D Univ Queensland, Dept Zool, St Lucia, Qld 4072, Australia Univ Queensland St Lucia Qld Australia 4072 ld 4072, Australia
Citazione:
D. Paetkau et al., "Genetic structure of the world's polar bear populations", MOL ECOL, 8(10), 1999, pp. 1571-1584

Abstract

We studied genetic structure in polar bear (Ursus maritimus) populations by typing a sample of 473 individuals spanning the species distribution at 16 highly Variable microsatellite loci. No genetic discontinuities were found that would be consistent with evolutionarily significant periods of isolation between groups. Direct comparison of movement data and genetic data from the Canadian Arctic revealed a highly significant correlation. Genetic data generally supported existing population (management unit) designations,although there were two cases where genetic data failed to differentiate between pairs of populations previously resolved by movement data. A sharp contrast was found between the minimal genetic structure observed among populations surrounding the polar basin and the presence of several marked genetic discontinuities in the Canadian Arctic. The discontinuities in the Canadian Arctic caused the appearance of four genetic clusters of polar bear populations. These clusters vary in total estimated population size from 100 to over 10 000, and the smallest may merit a relatively conservative management strategy in consideration of its apparent isolation. We suggest that the observed pattern of genetic discontinuities has developed in response todifferences in the seasonal distribution and pattern of sea ice habitat and the effects of these differences on the distribution and abundance of seals.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 07:25:35