At-sea abundance and distribution of skuas and jaegers (Charadriiformes: Stercorariidae) at coastal waters off central Chile
Indexación: Web of Science; Scielo. BACKGROUND: Skuas and jaegers (Charadriiformes: Stercorariidae) are seabirds breeding at moderate to high latitudes and some perform extensive post-breeding transequatorial migrations. Most species overwinter and perform significant portions of their migratory fly...
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Sociedad de Biología de Chile
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ftunivabello:oai:repositorio.unab.cl:ria/961 2023-05-15T13:49:40+02:00 At-sea abundance and distribution of skuas and jaegers (Charadriiformes: Stercorariidae) at coastal waters off central Chile Simeone, Alejandro Anguita, Cristóbal Luna-Jorquera, Guillermo 2014 application/pdf http://repositorio.unab.cl/xmlui/handle/ria/961 https://doi.org/10.1186/0717-6317-87-6 en eng Sociedad de Biología de Chile Rev. chil. hist. nat. vol.87 Santiago 2014 0716-078X http://dx.doi.org/10.1186/0717-6317-87-6 http://repositorio.unab.cl/xmlui/handle/ria/961 Skuas Jaegers Stercorariidae Seabirds Kleptoparasitism At-sea distribution Article 2014 ftunivabello https://doi.org/10.1186/0717-6317-87-6 2022-12-27T17:03:17Z Indexación: Web of Science; Scielo. BACKGROUND: Skuas and jaegers (Charadriiformes: Stercorariidae) are seabirds breeding at moderate to high latitudes and some perform extensive post-breeding transequatorial migrations. Most species overwinter and perform significant portions of their migratory flyways along the Pacific coast of South America, but scant information is available on their at-sea ecology in this waters. Our aims in this study were to determine: 1) the timing of occurrence and fluctuations in abundance of skua and jaeger species, 2) their spatial distribution within the coastal zone and 3) at-sea behavior of birds, including flock size and interactions with other seabird species. RESULTS: Between July 2006 and October 2013, we conducted at-sea bird counts at Valparaiso Bay (33°S) in central Chile and confirmed the occurrence of Chilean skuas (Stercorarius chilensis), Brown skuas (S. antarcticus), and Parasitic jaegers (S. parasiticus). Parasitic jaegers are regular austral summer visitors (November to March), whereas Brown skuas occur in the area only in winter (July to October). Chilean skuas were regularly recorded year-round in the area with higher abundances between late winter and early spring (August to October). Brown and Chilean skuas where observed comparatively offshore, whereas Jaegers presented a more coastal distribution, probably associated to host presence. Chilean skuas kleptoparasitized similar-sized (shearwaters and fulmars) and larger seabird species (boobies), whereas jaegers chased only smaller coastal birds (gulls and terns). Brown skuas engaged in no kleptoparasitic behaviors. All three species were observed mostly as solitary individuals. CONCLUSIONS: Skuas and jaegers showed in general a marked seasonality in their occurrence and abundance (only Chilean skua occurs year-round) and use this area as a commuting and stopover zone within their extensive migratory flyway along the southeastern Pacific. http://ref.scielo.org/p7thpb Article in Journal/Newspaper Antarc* antarcticus Universidad Andrés Bello: Repositorio Institucional Académico Austral Pacific Revista Chilena de Historia Natural 87 1 6 |
institution |
Open Polar |
collection |
Universidad Andrés Bello: Repositorio Institucional Académico |
op_collection_id |
ftunivabello |
language |
English |
topic |
Skuas Jaegers Stercorariidae Seabirds Kleptoparasitism At-sea distribution |
spellingShingle |
Skuas Jaegers Stercorariidae Seabirds Kleptoparasitism At-sea distribution Simeone, Alejandro Anguita, Cristóbal Luna-Jorquera, Guillermo At-sea abundance and distribution of skuas and jaegers (Charadriiformes: Stercorariidae) at coastal waters off central Chile |
topic_facet |
Skuas Jaegers Stercorariidae Seabirds Kleptoparasitism At-sea distribution |
description |
Indexación: Web of Science; Scielo. BACKGROUND: Skuas and jaegers (Charadriiformes: Stercorariidae) are seabirds breeding at moderate to high latitudes and some perform extensive post-breeding transequatorial migrations. Most species overwinter and perform significant portions of their migratory flyways along the Pacific coast of South America, but scant information is available on their at-sea ecology in this waters. Our aims in this study were to determine: 1) the timing of occurrence and fluctuations in abundance of skua and jaeger species, 2) their spatial distribution within the coastal zone and 3) at-sea behavior of birds, including flock size and interactions with other seabird species. RESULTS: Between July 2006 and October 2013, we conducted at-sea bird counts at Valparaiso Bay (33°S) in central Chile and confirmed the occurrence of Chilean skuas (Stercorarius chilensis), Brown skuas (S. antarcticus), and Parasitic jaegers (S. parasiticus). Parasitic jaegers are regular austral summer visitors (November to March), whereas Brown skuas occur in the area only in winter (July to October). Chilean skuas were regularly recorded year-round in the area with higher abundances between late winter and early spring (August to October). Brown and Chilean skuas where observed comparatively offshore, whereas Jaegers presented a more coastal distribution, probably associated to host presence. Chilean skuas kleptoparasitized similar-sized (shearwaters and fulmars) and larger seabird species (boobies), whereas jaegers chased only smaller coastal birds (gulls and terns). Brown skuas engaged in no kleptoparasitic behaviors. All three species were observed mostly as solitary individuals. CONCLUSIONS: Skuas and jaegers showed in general a marked seasonality in their occurrence and abundance (only Chilean skua occurs year-round) and use this area as a commuting and stopover zone within their extensive migratory flyway along the southeastern Pacific. http://ref.scielo.org/p7thpb |
format |
Article in Journal/Newspaper |
author |
Simeone, Alejandro Anguita, Cristóbal Luna-Jorquera, Guillermo |
author_facet |
Simeone, Alejandro Anguita, Cristóbal Luna-Jorquera, Guillermo |
author_sort |
Simeone, Alejandro |
title |
At-sea abundance and distribution of skuas and jaegers (Charadriiformes: Stercorariidae) at coastal waters off central Chile |
title_short |
At-sea abundance and distribution of skuas and jaegers (Charadriiformes: Stercorariidae) at coastal waters off central Chile |
title_full |
At-sea abundance and distribution of skuas and jaegers (Charadriiformes: Stercorariidae) at coastal waters off central Chile |
title_fullStr |
At-sea abundance and distribution of skuas and jaegers (Charadriiformes: Stercorariidae) at coastal waters off central Chile |
title_full_unstemmed |
At-sea abundance and distribution of skuas and jaegers (Charadriiformes: Stercorariidae) at coastal waters off central Chile |
title_sort |
at-sea abundance and distribution of skuas and jaegers (charadriiformes: stercorariidae) at coastal waters off central chile |
publisher |
Sociedad de Biología de Chile |
publishDate |
2014 |
url |
http://repositorio.unab.cl/xmlui/handle/ria/961 https://doi.org/10.1186/0717-6317-87-6 |
geographic |
Austral Pacific |
geographic_facet |
Austral Pacific |
genre |
Antarc* antarcticus |
genre_facet |
Antarc* antarcticus |
op_relation |
Rev. chil. hist. nat. vol.87 Santiago 2014 0716-078X http://dx.doi.org/10.1186/0717-6317-87-6 http://repositorio.unab.cl/xmlui/handle/ria/961 |
op_doi |
https://doi.org/10.1186/0717-6317-87-6 |
container_title |
Revista Chilena de Historia Natural |
container_volume |
87 |
container_issue |
1 |
container_start_page |
6 |
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1766251919993470976 |