Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands
Seabirds are central place foragers, relying on prey that is patchily distributed and of variable predictability. Species travelling at a high energetic cost are more strongly dependent on spatially predictable prey. This is the case for diving petrels Pelecanoides spp., which are small Procellariif...
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ftdeakinunifig:oai:figshare.com:article/20584602 2024-06-23T07:47:15+00:00 Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands CA Bost K Delord Y Cherel CM Miskelly A Carravieri P Bustamante John Arnould A Fromant 2022-01-01T00:00:00Z http://hdl.handle.net/10779/DRO/DU:20584602.v2 https://figshare.com/articles/journal_contribution/Foraging_trips_and_isotopic_niche_of_chick-rearing_South_Georgian_diving_petrels_from_the_Kerguelen_Islands/20584602 unknown http://hdl.handle.net/10779/DRO/DU:20584602.v2 https://figshare.com/articles/journal_contribution/Foraging_trips_and_isotopic_niche_of_chick-rearing_South_Georgian_diving_petrels_from_the_Kerguelen_Islands/20584602 All Rights Reserved Ecology not elsewhere classified Zoology not elsewhere classified Oceanography not elsewhere classified Science & Technology Life Sciences & Biomedicine Physical Sciences Ecology Marine & Freshwater Biology Oceanography Environmental Sciences & Ecology At-sea distribution Trophic niche Procellariiformes Pelecanoides georgicus Southern Ocean KING PENGUINS ENERGY-EXPENDITURE MARINE PREDATORS POLAR FRONT SEABIRDS HABITAT CROZET WATERS AREAS BLOOD School of Life and Environmental Sciences Text Journal contribution 2022 ftdeakinunifig 2024-06-06T02:05:01Z Seabirds are central place foragers, relying on prey that is patchily distributed and of variable predictability. Species travelling at a high energetic cost are more strongly dependent on spatially predictable prey. This is the case for diving petrels Pelecanoides spp., which are small Procellariiformes that feed by pursuit diving and travel by flapping constantly. Despite their abundance and importance as zooplankton consumers, information on the foraging strategy of diving petrels is still lacking. The detailed at-sea movements and the trophic niche of the South Georgian diving petrel P. georgicus was investigated for the first time using miniaturized GPS and the stable isotope method, respectively. Overall, South Georgian diving petrels from the Kerguelen Islands performed unexpected, direct and long-distance trips (mean foraging range: 191-217 km) to the Antarctic Polar Front, south of the archipelago. This foraging ground is a productive and predictable area, where the birds stopped and fed at the distal part of their trip. Blood isotopic values indicate that the tracked birds fed consistently on macrozooplankton. Such a distant oceanic feeding strategy contrasts with the coastal foraging patterns of the closely related common diving petrel P. urinatrix. Commuting to a more distant but easily accessible resource allows South Georgian diving petrels to cope with their high commuting costs, and to segregate spatially from the sympatric common diving petrel during the breeding season. Article in Journal/Newspaper Antarc* Antarctic Kerguelen Islands King Penguins Southern Ocean DRO - Deakin Research Online Antarctic Kerguelen Kerguelen Islands Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Ecology not elsewhere classified Zoology not elsewhere classified Oceanography not elsewhere classified Science & Technology Life Sciences & Biomedicine Physical Sciences Ecology Marine & Freshwater Biology Oceanography Environmental Sciences & Ecology At-sea distribution Trophic niche Procellariiformes Pelecanoides georgicus Southern Ocean KING PENGUINS ENERGY-EXPENDITURE MARINE PREDATORS POLAR FRONT SEABIRDS HABITAT CROZET WATERS AREAS BLOOD School of Life and Environmental Sciences |
spellingShingle |
Ecology not elsewhere classified Zoology not elsewhere classified Oceanography not elsewhere classified Science & Technology Life Sciences & Biomedicine Physical Sciences Ecology Marine & Freshwater Biology Oceanography Environmental Sciences & Ecology At-sea distribution Trophic niche Procellariiformes Pelecanoides georgicus Southern Ocean KING PENGUINS ENERGY-EXPENDITURE MARINE PREDATORS POLAR FRONT SEABIRDS HABITAT CROZET WATERS AREAS BLOOD School of Life and Environmental Sciences CA Bost K Delord Y Cherel CM Miskelly A Carravieri P Bustamante John Arnould A Fromant Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands |
topic_facet |
Ecology not elsewhere classified Zoology not elsewhere classified Oceanography not elsewhere classified Science & Technology Life Sciences & Biomedicine Physical Sciences Ecology Marine & Freshwater Biology Oceanography Environmental Sciences & Ecology At-sea distribution Trophic niche Procellariiformes Pelecanoides georgicus Southern Ocean KING PENGUINS ENERGY-EXPENDITURE MARINE PREDATORS POLAR FRONT SEABIRDS HABITAT CROZET WATERS AREAS BLOOD School of Life and Environmental Sciences |
description |
Seabirds are central place foragers, relying on prey that is patchily distributed and of variable predictability. Species travelling at a high energetic cost are more strongly dependent on spatially predictable prey. This is the case for diving petrels Pelecanoides spp., which are small Procellariiformes that feed by pursuit diving and travel by flapping constantly. Despite their abundance and importance as zooplankton consumers, information on the foraging strategy of diving petrels is still lacking. The detailed at-sea movements and the trophic niche of the South Georgian diving petrel P. georgicus was investigated for the first time using miniaturized GPS and the stable isotope method, respectively. Overall, South Georgian diving petrels from the Kerguelen Islands performed unexpected, direct and long-distance trips (mean foraging range: 191-217 km) to the Antarctic Polar Front, south of the archipelago. This foraging ground is a productive and predictable area, where the birds stopped and fed at the distal part of their trip. Blood isotopic values indicate that the tracked birds fed consistently on macrozooplankton. Such a distant oceanic feeding strategy contrasts with the coastal foraging patterns of the closely related common diving petrel P. urinatrix. Commuting to a more distant but easily accessible resource allows South Georgian diving petrels to cope with their high commuting costs, and to segregate spatially from the sympatric common diving petrel during the breeding season. |
format |
Article in Journal/Newspaper |
author |
CA Bost K Delord Y Cherel CM Miskelly A Carravieri P Bustamante John Arnould A Fromant |
author_facet |
CA Bost K Delord Y Cherel CM Miskelly A Carravieri P Bustamante John Arnould A Fromant |
author_sort |
CA Bost |
title |
Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands |
title_short |
Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands |
title_full |
Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands |
title_fullStr |
Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands |
title_full_unstemmed |
Foraging trips and isotopic niche of chick-rearing South Georgian diving petrels from the Kerguelen Islands |
title_sort |
foraging trips and isotopic niche of chick-rearing south georgian diving petrels from the kerguelen islands |
publishDate |
2022 |
url |
http://hdl.handle.net/10779/DRO/DU:20584602.v2 https://figshare.com/articles/journal_contribution/Foraging_trips_and_isotopic_niche_of_chick-rearing_South_Georgian_diving_petrels_from_the_Kerguelen_Islands/20584602 |
geographic |
Antarctic Kerguelen Kerguelen Islands Southern Ocean The Antarctic |
geographic_facet |
Antarctic Kerguelen Kerguelen Islands Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Kerguelen Islands King Penguins Southern Ocean |
genre_facet |
Antarc* Antarctic Kerguelen Islands King Penguins Southern Ocean |
op_relation |
http://hdl.handle.net/10779/DRO/DU:20584602.v2 https://figshare.com/articles/journal_contribution/Foraging_trips_and_isotopic_niche_of_chick-rearing_South_Georgian_diving_petrels_from_the_Kerguelen_Islands/20584602 |
op_rights |
All Rights Reserved |
_version_ |
1802651338119577600 |