Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014)
From 1985 to 2014, we monitored numbers of Red Knots Calidris canutus of the subspecies rufa occurring at Punta Rasa, Samborombón Bay, Buenos Aires province, Argentina during northward migration (March to April), and in the austral winter (mid-May to mid-August), when some knots, mainly immatures, r...
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ftconicet:oai:ri.conicet.gov.ar:11336/60216 2023-10-09T21:49:01+02:00 Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014) Martínez Curci, Natalia Soledad Bremer, Esteban Azpiroz, Adrián B. Battaglia, Gabriel E. Salerno, Javier C. Isacch, Juan Pablo González, Patricia M. Castresana, Gabriel J. Rojas, Pablo application/pdf http://hdl.handle.net/11336/60216 eng eng International Wader Study Group info:eu-repo/semantics/altIdentifier/doi/10.18194/ws.00018 info:eu-repo/semantics/altIdentifier/url/http://www.waderstudygroup.org/article/7301/ http://hdl.handle.net/11336/60216 Martínez Curci, Natalia Soledad; Bremer, Esteban; Azpiroz, Adrián B.; Battaglia, Gabriel E.; Salerno, Javier C.; et al.; Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014); International Wader Study Group; Wader Study; 122; 3; 12-2015; 236-242 2058-8410 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Calidris Canutus Rufa Over-Summering Punta Rasa Red Knot South America https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.18194/ws.00018 2023-09-24T18:36:55Z From 1985 to 2014, we monitored numbers of Red Knots Calidris canutus of the subspecies rufa occurring at Punta Rasa, Samborombón Bay, Buenos Aires province, Argentina during northward migration (March to April), and in the austral winter (mid-May to mid-August), when some knots, mainly immatures, remain in South America during the breeding season. Numbers occurring during northward migration declined over the monitoring period from a peak of 3,640 in 1987 to 168 in 2014. This is consistent with the concurrent decline of the main Tierra del Fuego wintering population (though the percentage of the Tierra del Fuego population stopping at Punta Rasa also declined from 5.4% to 1.3%). Numbers occurring at Punta Rasa during the austral winter have also declined, but not to the same extent and for the past decade more have been counted during the austral winter than during northward migration. Among those seen at Punta Rasa during the Arctic breeding season have been some with large amounts of rufous breeding plumage. The percentage of such birds has increased from 10–15% in 1987 to 19–54% during 2011–2014. Moreover, observations of individually marked birds show that some of those showing breeding plumage are mature adults, at least 3–7 years old. Conservation actions are required to manage Punta Rasa for the small but important numbers of Red Knots that occur there. Further research is needed to determine why some mature adults do not go to their Arctic breeding grounds and thereby fail to contribute to reproduction. Fil: Martínez Curci, Natalia Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Bremer, Esteban. Fundación Vida Silvestre Argentina; Argentina Fil: Azpiroz, Adrián B. Instituto de Investigaciones Biológicas "Clemente Estable"; Uruguay ... Article in Journal/Newspaper Arctic Calidris canutus Red Knot Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Arctic Austral Argentina Uruguay Martínez ENVELOPE(-62.183,-62.183,-64.650,-64.650) Wader Study 122 3 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Calidris Canutus Rufa Over-Summering Punta Rasa Red Knot South America https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
Calidris Canutus Rufa Over-Summering Punta Rasa Red Knot South America https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Martínez Curci, Natalia Soledad Bremer, Esteban Azpiroz, Adrián B. Battaglia, Gabriel E. Salerno, Javier C. Isacch, Juan Pablo González, Patricia M. Castresana, Gabriel J. Rojas, Pablo Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014) |
topic_facet |
Calidris Canutus Rufa Over-Summering Punta Rasa Red Knot South America https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
From 1985 to 2014, we monitored numbers of Red Knots Calidris canutus of the subspecies rufa occurring at Punta Rasa, Samborombón Bay, Buenos Aires province, Argentina during northward migration (March to April), and in the austral winter (mid-May to mid-August), when some knots, mainly immatures, remain in South America during the breeding season. Numbers occurring during northward migration declined over the monitoring period from a peak of 3,640 in 1987 to 168 in 2014. This is consistent with the concurrent decline of the main Tierra del Fuego wintering population (though the percentage of the Tierra del Fuego population stopping at Punta Rasa also declined from 5.4% to 1.3%). Numbers occurring at Punta Rasa during the austral winter have also declined, but not to the same extent and for the past decade more have been counted during the austral winter than during northward migration. Among those seen at Punta Rasa during the Arctic breeding season have been some with large amounts of rufous breeding plumage. The percentage of such birds has increased from 10–15% in 1987 to 19–54% during 2011–2014. Moreover, observations of individually marked birds show that some of those showing breeding plumage are mature adults, at least 3–7 years old. Conservation actions are required to manage Punta Rasa for the small but important numbers of Red Knots that occur there. Further research is needed to determine why some mature adults do not go to their Arctic breeding grounds and thereby fail to contribute to reproduction. Fil: Martínez Curci, Natalia Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Bremer, Esteban. Fundación Vida Silvestre Argentina; Argentina Fil: Azpiroz, Adrián B. Instituto de Investigaciones Biológicas "Clemente Estable"; Uruguay ... |
format |
Article in Journal/Newspaper |
author |
Martínez Curci, Natalia Soledad Bremer, Esteban Azpiroz, Adrián B. Battaglia, Gabriel E. Salerno, Javier C. Isacch, Juan Pablo González, Patricia M. Castresana, Gabriel J. Rojas, Pablo |
author_facet |
Martínez Curci, Natalia Soledad Bremer, Esteban Azpiroz, Adrián B. Battaglia, Gabriel E. Salerno, Javier C. Isacch, Juan Pablo González, Patricia M. Castresana, Gabriel J. Rojas, Pablo |
author_sort |
Martínez Curci, Natalia Soledad |
title |
Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014) |
title_short |
Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014) |
title_full |
Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014) |
title_fullStr |
Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014) |
title_full_unstemmed |
Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014) |
title_sort |
annual occurrence of red knot calidris canutus rufa at punta rasa, samborombón bay, argentina, over a 30-year period (1985–2014) |
publisher |
International Wader Study Group |
url |
http://hdl.handle.net/11336/60216 |
long_lat |
ENVELOPE(-62.183,-62.183,-64.650,-64.650) |
geographic |
Arctic Austral Argentina Uruguay Martínez |
geographic_facet |
Arctic Austral Argentina Uruguay Martínez |
genre |
Arctic Calidris canutus Red Knot Tierra del Fuego |
genre_facet |
Arctic Calidris canutus Red Knot Tierra del Fuego |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.18194/ws.00018 info:eu-repo/semantics/altIdentifier/url/http://www.waderstudygroup.org/article/7301/ http://hdl.handle.net/11336/60216 Martínez Curci, Natalia Soledad; Bremer, Esteban; Azpiroz, Adrián B.; Battaglia, Gabriel E.; Salerno, Javier C.; et al.; Annual occurrence of Red Knot Calidris canutus rufa at Punta Rasa, Samborombón Bay, Argentina, over a 30-year period (1985–2014); International Wader Study Group; Wader Study; 122; 3; 12-2015; 236-242 2058-8410 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.18194/ws.00018 |
container_title |
Wader Study |
container_volume |
122 |
container_issue |
3 |
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1779312049541611520 |