Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay
Ecological conditions in breeding and non-breeding areas of migrant birds have been linked to their annual survival and production of young, but the role of stopover sites is under-appreciated. Through banding studies and censuses along the flyway from Tierra del Fuego to the Canadian Arctic, the dr...
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ftunibueairesbd:todo:hornero_v021_n02_p109 2023-10-29T02:34:49+01:00 Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay Reducción de la supervivencia anual del playero rojizo (Calidris canutus rufa) en su escala migratoria de San Antonio Oeste, Argentina, por efectos dominó de llegada tardía y depresión del recurso trófico en Bahía Delaware González, Patricia M. Baker, Allan J. Echave, María Eugenia 2006-12 PDF https://hdl.handle.net/20.500.12110/hornero_v021_n02_p109 Inglés eng https://hdl.handle.net/20.500.12110/hornero_v021_n02_p109 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar CALIDRIS CANUTUS DOMINO EFFECTS MIGRATION POPULATION DECLINE RED KNOT STOPOVER ECOLOGY DECLINACION POBLACIONAL ECOLOGIA DE ESCALA MIGRATORIA EFECTO DOMINO MIGRACION PLAYERO ROJIZO 2006 ftunibueairesbd https://doi.org/20.500.12110/hornero_v021_n02_p109 2023-10-05T01:34:49Z Ecological conditions in breeding and non-breeding areas of migrant birds have been linked to their annual survival and production of young, but the role of stopover sites is under-appreciated. Through banding studies and censuses along the flyway from Tierra del Fuego to the Canadian Arctic, the drastic decline in 2000–2001 of Red Knots (Calidris canutus rufa) population summering in southern South America in the northern winter was shown to be related to the overharvesting of horseshoe crabs (Limulus polyphemus) in Delaware Bay, USA, their last stopover site before reaching their breeding grounds, and to the late arrival of the birds at this site. In San Antonio Oeste, Argentina, where 25–50% of the Tierra del Fuego Red Knots population congregates every northward migration season, annual survival of the cohort of experienced birds banded in March 1998 was impacted a year later than the general decline. Knots marked at San Antonio Oeste earlier in March arrived in Delaware Bay on average before those marked 15 days later. Additionally, early migrating knots with active body moult in San Antonio Oeste exhibited a higher return rate in the following years than late and non-moulting birds. Since the decline, birds arriving late in Delaware Bay have been at increased risk of not being able to refuel properly or on time because food is no longer superabundant at that stopover site. These domino effects indicate that there are fitness consequences to individual migration strategies adopted by birds at austral summering and stopover sites, which can be amplified by compressed timing in Delaware Bay when food is depleted at this final stopover site. Si bien se ha relacionado la condición de las áreas de estadía no reproductiva y reproductiva de las aves migratorias con su supervivencia y producción de crías, el papel de los sitios de escala como limitante del tamaño poblacional es escasamente conocido. Mediante estudios de anillado y censos a lo largo de la ruta de vuelo desde Tierra del Fuego hasta el Ártico de ... Other/Unknown Material Arctic Calidris canutus Red Knot Tierra del Fuego Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
English |
topic |
CALIDRIS CANUTUS DOMINO EFFECTS MIGRATION POPULATION DECLINE RED KNOT STOPOVER ECOLOGY DECLINACION POBLACIONAL ECOLOGIA DE ESCALA MIGRATORIA EFECTO DOMINO MIGRACION PLAYERO ROJIZO |
spellingShingle |
CALIDRIS CANUTUS DOMINO EFFECTS MIGRATION POPULATION DECLINE RED KNOT STOPOVER ECOLOGY DECLINACION POBLACIONAL ECOLOGIA DE ESCALA MIGRATORIA EFECTO DOMINO MIGRACION PLAYERO ROJIZO González, Patricia M. Baker, Allan J. Echave, María Eugenia Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay |
topic_facet |
CALIDRIS CANUTUS DOMINO EFFECTS MIGRATION POPULATION DECLINE RED KNOT STOPOVER ECOLOGY DECLINACION POBLACIONAL ECOLOGIA DE ESCALA MIGRATORIA EFECTO DOMINO MIGRACION PLAYERO ROJIZO |
description |
Ecological conditions in breeding and non-breeding areas of migrant birds have been linked to their annual survival and production of young, but the role of stopover sites is under-appreciated. Through banding studies and censuses along the flyway from Tierra del Fuego to the Canadian Arctic, the drastic decline in 2000–2001 of Red Knots (Calidris canutus rufa) population summering in southern South America in the northern winter was shown to be related to the overharvesting of horseshoe crabs (Limulus polyphemus) in Delaware Bay, USA, their last stopover site before reaching their breeding grounds, and to the late arrival of the birds at this site. In San Antonio Oeste, Argentina, where 25–50% of the Tierra del Fuego Red Knots population congregates every northward migration season, annual survival of the cohort of experienced birds banded in March 1998 was impacted a year later than the general decline. Knots marked at San Antonio Oeste earlier in March arrived in Delaware Bay on average before those marked 15 days later. Additionally, early migrating knots with active body moult in San Antonio Oeste exhibited a higher return rate in the following years than late and non-moulting birds. Since the decline, birds arriving late in Delaware Bay have been at increased risk of not being able to refuel properly or on time because food is no longer superabundant at that stopover site. These domino effects indicate that there are fitness consequences to individual migration strategies adopted by birds at austral summering and stopover sites, which can be amplified by compressed timing in Delaware Bay when food is depleted at this final stopover site. Si bien se ha relacionado la condición de las áreas de estadía no reproductiva y reproductiva de las aves migratorias con su supervivencia y producción de crías, el papel de los sitios de escala como limitante del tamaño poblacional es escasamente conocido. Mediante estudios de anillado y censos a lo largo de la ruta de vuelo desde Tierra del Fuego hasta el Ártico de ... |
author |
González, Patricia M. Baker, Allan J. Echave, María Eugenia |
author_facet |
González, Patricia M. Baker, Allan J. Echave, María Eugenia |
author_sort |
González, Patricia M. |
title |
Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay |
title_short |
Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay |
title_full |
Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay |
title_fullStr |
Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay |
title_full_unstemmed |
Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay |
title_sort |
annual survival of red knots (calidris canutus rufa) using the san antonio oeste stopover site is reduced by domino effects involving late arrival and food depletion in delaware bay |
publishDate |
2006 |
url |
https://hdl.handle.net/20.500.12110/hornero_v021_n02_p109 |
genre |
Arctic Calidris canutus Red Knot Tierra del Fuego |
genre_facet |
Arctic Calidris canutus Red Knot Tierra del Fuego |
op_relation |
https://hdl.handle.net/20.500.12110/hornero_v021_n02_p109 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar |
op_doi |
https://doi.org/20.500.12110/hornero_v021_n02_p109 |
_version_ |
1781057579708841984 |