Migration Along Orthodromic Sun Compass Routes by Arctic Birds

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Standard

Migration Along Orthodromic Sun Compass Routes by Arctic Birds. / Alerstam, Thomas; Gudmundsson, Gudmundur A.; Green, Martin; Hedenström, Anders.

I: Science, Vol. 291, Nr. 5502, 2001, s. 300-303.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Harvard

APA

CBE

MLA

Vancouver

Author

RIS

TY - JOUR

T1 - Migration Along Orthodromic Sun Compass Routes by Arctic Birds

AU - Alerstam, Thomas

AU - Gudmundsson, Gudmundur A.

AU - Green, Martin

AU - Hedenström, Anders

PY - 2001

Y1 - 2001

N2 - Flight directions of birds migrating at high geographic and magnetic latitudes can be used to test bird orientation by celestial or geomagnetic compass systems under polar conditions. Migration patterns of arctic shorebirds, revealed by tracking radar studies during an icebreaker expedition along the Northwest Passage in 1999, support predicted sun compass trajectories but cannot be reconciled with orientation along either geographic or magnetic loxodromes (rhumb lines). Sun compass routes are similar to orthodromes (great circle routes) at high latitudes, showing changing geographic courses as the birds traverse longitudes and their internal clock gets out of phase with local time. These routes bring the shorebirds from high arctic Canada to the east coast of North America, from which they make transoceanic flights to South America. The observations are also consistent with a migration link between Siberia and the Beaufort Sea region by way of sun compass routes across the Arctic Ocean.

AB - Flight directions of birds migrating at high geographic and magnetic latitudes can be used to test bird orientation by celestial or geomagnetic compass systems under polar conditions. Migration patterns of arctic shorebirds, revealed by tracking radar studies during an icebreaker expedition along the Northwest Passage in 1999, support predicted sun compass trajectories but cannot be reconciled with orientation along either geographic or magnetic loxodromes (rhumb lines). Sun compass routes are similar to orthodromes (great circle routes) at high latitudes, showing changing geographic courses as the birds traverse longitudes and their internal clock gets out of phase with local time. These routes bring the shorebirds from high arctic Canada to the east coast of North America, from which they make transoceanic flights to South America. The observations are also consistent with a migration link between Siberia and the Beaufort Sea region by way of sun compass routes across the Arctic Ocean.

U2 - 10.1126/science.291.5502.300

DO - 10.1126/science.291.5502.300

M3 - Article

VL - 291

SP - 300

EP - 303

JO - Science (New York, N.Y.)

T2 - Science (New York, N.Y.)

JF - Science (New York, N.Y.)

SN - 1095-9203

IS - 5502

ER -