Status of breeding birds at Observatorio and Goffré Islands, Argentina
Continental islands are often sites of low diversity and endemism, as well as important areas for the protection of bird populations, especially seabirds. On Isla Observatorio and the Año Nuevo Islands, in the Southwestern Atlantic, the latest assessment of avifauna dates from more than 20 years ago...
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ftcsic:oai:digital.csic.es:10261/320506 2024-02-11T10:03:58+01:00 Status of breeding birds at Observatorio and Goffré Islands, Argentina Balza, U. Liljesthröm, M. Franco-Navarro, Ignacio José Cañas-Barrovecchio, S. Zunino, F. Domato, I. Arcadi, S. Iturraspe, R. Cano, J. Raya-Rey, A. 2016-2020 2022-02-12 http://hdl.handle.net/10508/16044 http://hdl.handle.net/10261/320506 https://doi.org/10.1007/s00300-022-03019-2 en eng Centro Oceanográfico de Murcia AM Polar Biology, 45. 2022: 667-673 0722-4060 http://hdl.handle.net/10508/16044 http://hdl.handle.net/10261/320506 https://doi.org/10.1007/s00300-022-03019-2 50348 1432-2056 open Medio Marino Population assessment Centro Oceanográfico de Murcia Vegetation classification Point-centered quarter method Continental islands breeding islands biology endemism wetlands research article 2022 ftcsic https://doi.org/10.1007/s00300-022-03019-2 2024-01-16T11:46:03Z Continental islands are often sites of low diversity and endemism, as well as important areas for the protection of bird populations, especially seabirds. On Isla Observatorio and the Año Nuevo Islands, in the Southwestern Atlantic, the latest assessment of avifauna dates from more than 20 years ago. In this study, we use a combination of methods to update the status of the main seabird colonies and the most abundant avian terrestrial predator at Observatorio and Goffré Islands during the breeding season. In only 4.5 km2, the islands would harbour ~ 90,000 breeding seabirds. Seabird colonies occupied different areas of the islands and varied in their population status, with Imperial Shags (Leucocarbo atriceps) showing an increase and Southern Giant Petrels (Macronectes giganteus) a decrease according to the last surveys. Magellanic Penguin (Spheniscus magellanicus) population estimations also suggest a decrease but the last survey was based on total, and not on occupied nest sites. We recorded and assessed one new breeding species: The globally near-threatened Striated Caracara (Phalcoboenus australis), which has an important breeding population of around 15 territorial pairs at Observatorio Island. These islands appear to be an important regional bird site and future studies would determine their trends and threats, especially those related with invasive species. SI Article in Journal/Newspaper Giant Petrels Macronectes giganteus Polar Biology Digital.CSIC (Spanish National Research Council) Argentina Giganteus ENVELOPE(62.500,62.500,-67.567,-67.567) isla Observatorio ENVELOPE(-62.993,-62.993,-64.330,-64.330) Observatorio ENVELOPE(-62.993,-62.993,-64.330,-64.330) Polar Biology 45 4 667 673 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Medio Marino Population assessment Centro Oceanográfico de Murcia Vegetation classification Point-centered quarter method Continental islands breeding islands biology endemism wetlands |
spellingShingle |
Medio Marino Population assessment Centro Oceanográfico de Murcia Vegetation classification Point-centered quarter method Continental islands breeding islands biology endemism wetlands Balza, U. Liljesthröm, M. Franco-Navarro, Ignacio José Cañas-Barrovecchio, S. Zunino, F. Domato, I. Arcadi, S. Iturraspe, R. Cano, J. Raya-Rey, A. Status of breeding birds at Observatorio and Goffré Islands, Argentina |
topic_facet |
Medio Marino Population assessment Centro Oceanográfico de Murcia Vegetation classification Point-centered quarter method Continental islands breeding islands biology endemism wetlands |
description |
Continental islands are often sites of low diversity and endemism, as well as important areas for the protection of bird populations, especially seabirds. On Isla Observatorio and the Año Nuevo Islands, in the Southwestern Atlantic, the latest assessment of avifauna dates from more than 20 years ago. In this study, we use a combination of methods to update the status of the main seabird colonies and the most abundant avian terrestrial predator at Observatorio and Goffré Islands during the breeding season. In only 4.5 km2, the islands would harbour ~ 90,000 breeding seabirds. Seabird colonies occupied different areas of the islands and varied in their population status, with Imperial Shags (Leucocarbo atriceps) showing an increase and Southern Giant Petrels (Macronectes giganteus) a decrease according to the last surveys. Magellanic Penguin (Spheniscus magellanicus) population estimations also suggest a decrease but the last survey was based on total, and not on occupied nest sites. We recorded and assessed one new breeding species: The globally near-threatened Striated Caracara (Phalcoboenus australis), which has an important breeding population of around 15 territorial pairs at Observatorio Island. These islands appear to be an important regional bird site and future studies would determine their trends and threats, especially those related with invasive species. SI |
format |
Article in Journal/Newspaper |
author |
Balza, U. Liljesthröm, M. Franco-Navarro, Ignacio José Cañas-Barrovecchio, S. Zunino, F. Domato, I. Arcadi, S. Iturraspe, R. Cano, J. Raya-Rey, A. |
author_facet |
Balza, U. Liljesthröm, M. Franco-Navarro, Ignacio José Cañas-Barrovecchio, S. Zunino, F. Domato, I. Arcadi, S. Iturraspe, R. Cano, J. Raya-Rey, A. |
author_sort |
Balza, U. |
title |
Status of breeding birds at Observatorio and Goffré Islands, Argentina |
title_short |
Status of breeding birds at Observatorio and Goffré Islands, Argentina |
title_full |
Status of breeding birds at Observatorio and Goffré Islands, Argentina |
title_fullStr |
Status of breeding birds at Observatorio and Goffré Islands, Argentina |
title_full_unstemmed |
Status of breeding birds at Observatorio and Goffré Islands, Argentina |
title_sort |
status of breeding birds at observatorio and goffré islands, argentina |
publishDate |
2022 |
url |
http://hdl.handle.net/10508/16044 http://hdl.handle.net/10261/320506 https://doi.org/10.1007/s00300-022-03019-2 |
op_coverage |
2016-2020 |
long_lat |
ENVELOPE(62.500,62.500,-67.567,-67.567) ENVELOPE(-62.993,-62.993,-64.330,-64.330) ENVELOPE(-62.993,-62.993,-64.330,-64.330) |
geographic |
Argentina Giganteus isla Observatorio Observatorio |
geographic_facet |
Argentina Giganteus isla Observatorio Observatorio |
genre |
Giant Petrels Macronectes giganteus Polar Biology |
genre_facet |
Giant Petrels Macronectes giganteus Polar Biology |
op_relation |
Centro Oceanográfico de Murcia AM Polar Biology, 45. 2022: 667-673 0722-4060 http://hdl.handle.net/10508/16044 http://hdl.handle.net/10261/320506 https://doi.org/10.1007/s00300-022-03019-2 50348 1432-2056 |
op_rights |
open |
op_doi |
https://doi.org/10.1007/s00300-022-03019-2 |
container_title |
Polar Biology |
container_volume |
45 |
container_issue |
4 |
container_start_page |
667 |
op_container_end_page |
673 |
_version_ |
1790600382908465152 |