Inter- and intraspecific variation of breeding biology, movements, and genotype in Peregrine Falcon Falco peregrinus and Gyrfalcon F. rusticolus populations in Greenland
Peregrines Falco peregrinus and Gyrfalcons F. rusticolus were studied in Low and High Arctic Greenland, comparing populations within and between areas. Analyses of weather data from northwest Greenland (1979–2005) revealed a general warming trend, resulting in a lengthened breeding window for many b...
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ftuloxford:oai:ora.ox.ac.uk:uuid:623ab74c-4f50-4ed8-b163-6f1c5bcbac2e 2024-09-30T14:31:44+00:00 Inter- and intraspecific variation of breeding biology, movements, and genotype in Peregrine Falcon Falco peregrinus and Gyrfalcon F. rusticolus populations in Greenland Burnham, K Newton, I Gosler, A 2016-07-28 https://ora.ox.ac.uk/objects/uuid:623ab74c-4f50-4ed8-b163-6f1c5bcbac2e eng eng https://ora.ox.ac.uk/objects/uuid:623ab74c-4f50-4ed8-b163-6f1c5bcbac2e info:eu-repo/semantics/openAccess Ecology (zoology) Biology Genetics (life sciences) Environmental change Thesis 2016 ftuloxford 2024-09-06T07:47:35Z Peregrines Falco peregrinus and Gyrfalcons F. rusticolus were studied in Low and High Arctic Greenland, comparing populations within and between areas. Analyses of weather data from northwest Greenland (1979–2005) revealed a general warming trend, resulting in a lengthened breeding window for many bird species. Both falcon species depend on cliffs for nesting, and take a similar range of bird species as prey. However, Gyrfalcons lay six weeks earlier than Peregrines in Kangerlussuaq and one month earlier than Peregrines in Thule, and occupy more sheltered nest-sites. Being larger than Peregrines, Gyrfalcons also take some larger prey species. In addition, both species move to lower latitudes for the winter, but while most Gyrfalcons migrate relatively short distances, Peregrines are complete long-distance migrants to Central and South America. One Peregrine, satellite-tracked from its breeding site at 76.5° N, travelled ~12,500 km and >100° in latitude, one of the longest migrations ever documented for a raptor.Around Thule in northwest Greenland (at 76.5° N), scientists had historically documented no breeding Peregrines, but six occupied sites were discovered during this study, comprising what is probably the most northern nesting population in the world. Over the same period, breeding Gyrfalcons have apparently disappeared from southern Greenland, and may have declined in central-west Greenland (67° N). The ultimate cause of this retraction may be climate warming, but the proximate cause is probably competition from an increasing Peregrine population.Gyrfalcons tagged with satellite-received transmitters showed characteristics associated with both obligate and facultative migration. Their winter ranges varied greatly in size, with the largest, ~172,000 km2, being the biggest ever documented for a raptor. Many individuals made long movements within a winter, and some spent up to a month at sea. They may have rested on ice and fed upon seabirds. Carbon dating of stratified faecal accumulation from Gyrfalcon ... Thesis Arctic Falco peregrinus Greenland gyrfalcon Kangerlussuaq peregrine falcon Thule ORA - Oxford University Research Archive Arctic Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) |
institution |
Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
English |
topic |
Ecology (zoology) Biology Genetics (life sciences) Environmental change |
spellingShingle |
Ecology (zoology) Biology Genetics (life sciences) Environmental change Burnham, K Inter- and intraspecific variation of breeding biology, movements, and genotype in Peregrine Falcon Falco peregrinus and Gyrfalcon F. rusticolus populations in Greenland |
topic_facet |
Ecology (zoology) Biology Genetics (life sciences) Environmental change |
description |
Peregrines Falco peregrinus and Gyrfalcons F. rusticolus were studied in Low and High Arctic Greenland, comparing populations within and between areas. Analyses of weather data from northwest Greenland (1979–2005) revealed a general warming trend, resulting in a lengthened breeding window for many bird species. Both falcon species depend on cliffs for nesting, and take a similar range of bird species as prey. However, Gyrfalcons lay six weeks earlier than Peregrines in Kangerlussuaq and one month earlier than Peregrines in Thule, and occupy more sheltered nest-sites. Being larger than Peregrines, Gyrfalcons also take some larger prey species. In addition, both species move to lower latitudes for the winter, but while most Gyrfalcons migrate relatively short distances, Peregrines are complete long-distance migrants to Central and South America. One Peregrine, satellite-tracked from its breeding site at 76.5° N, travelled ~12,500 km and >100° in latitude, one of the longest migrations ever documented for a raptor.Around Thule in northwest Greenland (at 76.5° N), scientists had historically documented no breeding Peregrines, but six occupied sites were discovered during this study, comprising what is probably the most northern nesting population in the world. Over the same period, breeding Gyrfalcons have apparently disappeared from southern Greenland, and may have declined in central-west Greenland (67° N). The ultimate cause of this retraction may be climate warming, but the proximate cause is probably competition from an increasing Peregrine population.Gyrfalcons tagged with satellite-received transmitters showed characteristics associated with both obligate and facultative migration. Their winter ranges varied greatly in size, with the largest, ~172,000 km2, being the biggest ever documented for a raptor. Many individuals made long movements within a winter, and some spent up to a month at sea. They may have rested on ice and fed upon seabirds. Carbon dating of stratified faecal accumulation from Gyrfalcon ... |
author2 |
Newton, I Gosler, A |
format |
Thesis |
author |
Burnham, K |
author_facet |
Burnham, K |
author_sort |
Burnham, K |
title |
Inter- and intraspecific variation of breeding biology, movements, and genotype in Peregrine Falcon Falco peregrinus and Gyrfalcon F. rusticolus populations in Greenland |
title_short |
Inter- and intraspecific variation of breeding biology, movements, and genotype in Peregrine Falcon Falco peregrinus and Gyrfalcon F. rusticolus populations in Greenland |
title_full |
Inter- and intraspecific variation of breeding biology, movements, and genotype in Peregrine Falcon Falco peregrinus and Gyrfalcon F. rusticolus populations in Greenland |
title_fullStr |
Inter- and intraspecific variation of breeding biology, movements, and genotype in Peregrine Falcon Falco peregrinus and Gyrfalcon F. rusticolus populations in Greenland |
title_full_unstemmed |
Inter- and intraspecific variation of breeding biology, movements, and genotype in Peregrine Falcon Falco peregrinus and Gyrfalcon F. rusticolus populations in Greenland |
title_sort |
inter- and intraspecific variation of breeding biology, movements, and genotype in peregrine falcon falco peregrinus and gyrfalcon f. rusticolus populations in greenland |
publishDate |
2016 |
url |
https://ora.ox.ac.uk/objects/uuid:623ab74c-4f50-4ed8-b163-6f1c5bcbac2e |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Arctic Greenland Kangerlussuaq |
geographic_facet |
Arctic Greenland Kangerlussuaq |
genre |
Arctic Falco peregrinus Greenland gyrfalcon Kangerlussuaq peregrine falcon Thule |
genre_facet |
Arctic Falco peregrinus Greenland gyrfalcon Kangerlussuaq peregrine falcon Thule |
op_relation |
https://ora.ox.ac.uk/objects/uuid:623ab74c-4f50-4ed8-b163-6f1c5bcbac2e |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1811636130227945472 |