Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean
Seabirds breeding in tropical environments experience high energetic demands, when foraging in an oligotrophic environment. The globally threatened Trindade petrel Pterodroma arminjoniana has its largest colony in Trindade Island (20°30′S–29°19′W) inside the oligotrophic South Atlantic Subtropical G...
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ftuglasgow:oai:eprints.gla.ac.uk:149389 2023-05-15T18:21:12+02:00 Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean Leal, Gustavo R. Furness, Robert W. McGill, Rona A.R. Santos, Roberta A. Bugoni, Leandro 2017-11 text https://eprints.gla.ac.uk/149389/ https://eprints.gla.ac.uk/149389/7/149389.pdf en eng Springer https://eprints.gla.ac.uk/149389/7/149389.pdf Leal, G. R., Furness, R. W. <http://eprints.gla.ac.uk/view/author/11403.html>, McGill, R. A.R. <http://eprints.gla.ac.uk/view/author/10394.html> , Santos, R. A. and Bugoni, L. (2017) Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean. Marine Biology <https://eprints.gla.ac.uk/view/journal_volume/Marine_Biology.html>, 164, 211. (doi:10.1007/s00227-017-3240-8 <https://doi.org/10.1007/s00227-017-3240-8>) Articles PeerReviewed 2017 ftuglasgow https://doi.org/10.1007/s00227-017-3240-8 2022-09-22T22:13:47Z Seabirds breeding in tropical environments experience high energetic demands, when foraging in an oligotrophic environment. The globally threatened Trindade petrel Pterodroma arminjoniana has its largest colony in Trindade Island (20°30′S–29°19′W) inside the oligotrophic South Atlantic Subtropical Gyre. Diet sampling methods, geolocator tracking and stable isotope analysis were used to describe its diet, compare foraging trips and distributions, and assess temporal variations in the trophic niche throughout the breeding period. Diet consisted mainly of squid and fish. The high species diversity and wide range of prey sizes consumed suggests the use of multiple foraging techniques. Stable isotope mixing models confirm that Trindade petrels rely mainly on squid throughout the breeding period. Its broad isotopic niche seems to reflect both a diverse diet and foraging range, since birds can reach up to 3335 km from the colony. Isotopic niche showed limited variation even in an 8-year interval, apparently due to oceanographic stability, although changes in the isotopic niche have demonstrated an adjustment to different conditions in different seasons. Petrels change foraging areas and prey during the breeding period: pre-incubating birds use more productive areas west of Trindade Island and obtain low trophic position prey; incubating petrels perform longer trips southward to consume prey of high trophic position; and chick-rearing petrels use areas around the island. These results demonstrate that to deal with high demand breeding in a colony surrounded by oligotrophic waters, Trindade petrels need to explore wide foraging areas and utilize a diverse diet, besides adjusting trophic niche according to breeding stage. Article in Journal/Newspaper South Atlantic Ocean University of Glasgow: Enlighten - Publications Marine Biology 164 11 |
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Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
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ftuglasgow |
language |
English |
description |
Seabirds breeding in tropical environments experience high energetic demands, when foraging in an oligotrophic environment. The globally threatened Trindade petrel Pterodroma arminjoniana has its largest colony in Trindade Island (20°30′S–29°19′W) inside the oligotrophic South Atlantic Subtropical Gyre. Diet sampling methods, geolocator tracking and stable isotope analysis were used to describe its diet, compare foraging trips and distributions, and assess temporal variations in the trophic niche throughout the breeding period. Diet consisted mainly of squid and fish. The high species diversity and wide range of prey sizes consumed suggests the use of multiple foraging techniques. Stable isotope mixing models confirm that Trindade petrels rely mainly on squid throughout the breeding period. Its broad isotopic niche seems to reflect both a diverse diet and foraging range, since birds can reach up to 3335 km from the colony. Isotopic niche showed limited variation even in an 8-year interval, apparently due to oceanographic stability, although changes in the isotopic niche have demonstrated an adjustment to different conditions in different seasons. Petrels change foraging areas and prey during the breeding period: pre-incubating birds use more productive areas west of Trindade Island and obtain low trophic position prey; incubating petrels perform longer trips southward to consume prey of high trophic position; and chick-rearing petrels use areas around the island. These results demonstrate that to deal with high demand breeding in a colony surrounded by oligotrophic waters, Trindade petrels need to explore wide foraging areas and utilize a diverse diet, besides adjusting trophic niche according to breeding stage. |
format |
Article in Journal/Newspaper |
author |
Leal, Gustavo R. Furness, Robert W. McGill, Rona A.R. Santos, Roberta A. Bugoni, Leandro |
spellingShingle |
Leal, Gustavo R. Furness, Robert W. McGill, Rona A.R. Santos, Roberta A. Bugoni, Leandro Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean |
author_facet |
Leal, Gustavo R. Furness, Robert W. McGill, Rona A.R. Santos, Roberta A. Bugoni, Leandro |
author_sort |
Leal, Gustavo R. |
title |
Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean |
title_short |
Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean |
title_full |
Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean |
title_fullStr |
Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean |
title_full_unstemmed |
Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean |
title_sort |
feeding and foraging ecology of trindade petrels pterodroma arminjoniana during the breeding period in the south atlantic ocean |
publisher |
Springer |
publishDate |
2017 |
url |
https://eprints.gla.ac.uk/149389/ https://eprints.gla.ac.uk/149389/7/149389.pdf |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
https://eprints.gla.ac.uk/149389/7/149389.pdf Leal, G. R., Furness, R. W. <http://eprints.gla.ac.uk/view/author/11403.html>, McGill, R. A.R. <http://eprints.gla.ac.uk/view/author/10394.html> , Santos, R. A. and Bugoni, L. (2017) Feeding and foraging ecology of Trindade petrels Pterodroma arminjoniana during the breeding period in the South Atlantic Ocean. Marine Biology <https://eprints.gla.ac.uk/view/journal_volume/Marine_Biology.html>, 164, 211. (doi:10.1007/s00227-017-3240-8 <https://doi.org/10.1007/s00227-017-3240-8>) |
op_doi |
https://doi.org/10.1007/s00227-017-3240-8 |
container_title |
Marine Biology |
container_volume |
164 |
container_issue |
11 |
_version_ |
1766200359555956736 |