Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005

Autores
Baker,Allan J.; González, Patricia M.; Serrano, Ines L.; Júnior, Wallace R. T.; Efe, Marcio A.; Rice, Susan; D'amico, Veronica Laura; Rocha, Marcia C.; Echave, María Eugenia
Año de publicación
2005
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
To assess population size and the conservation status of the Red Knot Calidris canutus rufa population in Maranhão, N Brazil, an aerial census and field studies were conducted in February 2005. The aerial count showed a population of 7,575 Knots, which is down about 600 from a previous census in the 1980s. However, the count for all shorebird species combined was only 24,000 compared to 198,600 in the 1980s, paralleling a world-wide trend of population decline in shorebirds. Resightings of colour-banded knots confirmed that this is a separate population from the larger wintering population in Tierra del Fuego. All species of shorebirds captured in Maranhão were found to be infested with feather lice and mites. Body masses of knots in Maranhão were significantly lower than in Tierra del Fuego, and about half the birds were below the hypothesized fat-free mass of the species. Blood and feather samples were taken from 38 Knots for subsequent assessment of virus loads, and for detecting sites where primary feather moult had occurred. This will enable us to establish whether significant mortality is associated with pathogen loads and the energetic demands of delayed moulting. The small size of the Maranhão population and the loss of another 13,000 knots this winter from the Tierra del Fuego population means that both are now endangered. Brochures on the need for Red Knot conservation were designed and printed, and have been circulated among fishing communities and school classes in Maranhão.
Fil: Baker,Allan J.. Royal Ontario Museum; Canadá
Fil: González, Patricia M.. Fundación Inalafquen; Argentina
Fil: Serrano, Ines L.. CEMAVE, Centro Nacional de Pesquisa para Conservação das Aves Silvestres; Brasil
Fil: Júnior, Wallace R. T.. CEMAVE, Centro Nacional de Pesquisa para Conservação das Aves Silvestres; Brasil
Fil: Efe, Marcio A.. Universidade Federal de Alagoas; Brasil
Fil: Rice, Susan. Eastern Shore of Virginia National Wildlife Refuge; Estados Unidos
Fil: D'amico, Veronica Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Rocha, Marcia C.. Belém, Pará; Brasil
Fil: Echave, María Eugenia. Fundación Inalafquen; Argentina
Materia
BRAZIL
MARANHÃO WETLANDS
RED KNOT
CALIDRIS CANUTUS RUFA
POPULATION DYNAMICS
CONSERVATION
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/105224
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/105224
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005Baker,Allan J.González, Patricia M.Serrano, Ines L.Júnior, Wallace R. T.Efe, Marcio A.Rice, SusanD'amico, Veronica LauraRocha, Marcia C.Echave, María EugeniaBRAZILMARANHÃO WETLANDSRED KNOTCALIDRIS CANUTUS RUFAPOPULATION DYNAMICSCONSERVATIONhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1To assess population size and the conservation status of the Red Knot Calidris canutus rufa population in Maranhão, N Brazil, an aerial census and field studies were conducted in February 2005. The aerial count showed a population of 7,575 Knots, which is down about 600 from a previous census in the 1980s. However, the count for all shorebird species combined was only 24,000 compared to 198,600 in the 1980s, paralleling a world-wide trend of population decline in shorebirds. Resightings of colour-banded knots confirmed that this is a separate population from the larger wintering population in Tierra del Fuego. All species of shorebirds captured in Maranhão were found to be infested with feather lice and mites. Body masses of knots in Maranhão were significantly lower than in Tierra del Fuego, and about half the birds were below the hypothesized fat-free mass of the species. Blood and feather samples were taken from 38 Knots for subsequent assessment of virus loads, and for detecting sites where primary feather moult had occurred. This will enable us to establish whether significant mortality is associated with pathogen loads and the energetic demands of delayed moulting. The small size of the Maranhão population and the loss of another 13,000 knots this winter from the Tierra del Fuego population means that both are now endangered. Brochures on the need for Red Knot conservation were designed and printed, and have been circulated among fishing communities and school classes in Maranhão.Fil: Baker,Allan J.. Royal Ontario Museum; CanadáFil: González, Patricia M.. Fundación Inalafquen; ArgentinaFil: Serrano, Ines L.. CEMAVE, Centro Nacional de Pesquisa para Conservação das Aves Silvestres; BrasilFil: Júnior, Wallace R. T.. CEMAVE, Centro Nacional de Pesquisa para Conservação das Aves Silvestres; BrasilFil: Efe, Marcio A.. Universidade Federal de Alagoas; BrasilFil: Rice, Susan. Eastern Shore of Virginia National Wildlife Refuge; Estados UnidosFil: D'amico, Veronica Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Rocha, Marcia C.. Belém, Pará; BrasilFil: Echave, María Eugenia. Fundación Inalafquen; ArgentinaInternational Wader Study Group2005-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/105224Baker,Allan J.; González, Patricia M.; Serrano, Ines L.; Júnior, Wallace R. T.; Efe, Marcio A.; et al.; Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005; International Wader Study Group; Wader Study Group Bulletin; 107; 12-2005; 10-180260-3799CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.waderstudygroup.org/article/3215/info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:32:33Zoai:ri.conicet.gov.ar:11336/105224instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:32:33.38CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005
title Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005
spellingShingle Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005
Baker,Allan J.
BRAZIL
MARANHÃO WETLANDS
RED KNOT
CALIDRIS CANUTUS RUFA
POPULATION DYNAMICS
CONSERVATION
title_short Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005
title_full Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005
title_fullStr Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005
title_full_unstemmed Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005
title_sort Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005
dc.creator.none.fl_str_mv Baker,Allan J.
González, Patricia M.
Serrano, Ines L.
Júnior, Wallace R. T.
Efe, Marcio A.
Rice, Susan
D'amico, Veronica Laura
Rocha, Marcia C.
Echave, María Eugenia
author Baker,Allan J.
author_facet Baker,Allan J.
González, Patricia M.
Serrano, Ines L.
Júnior, Wallace R. T.
Efe, Marcio A.
Rice, Susan
D'amico, Veronica Laura
Rocha, Marcia C.
Echave, María Eugenia
author_role author
author2 González, Patricia M.
Serrano, Ines L.
Júnior, Wallace R. T.
Efe, Marcio A.
Rice, Susan
D'amico, Veronica Laura
Rocha, Marcia C.
Echave, María Eugenia
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv BRAZIL
MARANHÃO WETLANDS
RED KNOT
CALIDRIS CANUTUS RUFA
POPULATION DYNAMICS
CONSERVATION
topic BRAZIL
MARANHÃO WETLANDS
RED KNOT
CALIDRIS CANUTUS RUFA
POPULATION DYNAMICS
CONSERVATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv To assess population size and the conservation status of the Red Knot Calidris canutus rufa population in Maranhão, N Brazil, an aerial census and field studies were conducted in February 2005. The aerial count showed a population of 7,575 Knots, which is down about 600 from a previous census in the 1980s. However, the count for all shorebird species combined was only 24,000 compared to 198,600 in the 1980s, paralleling a world-wide trend of population decline in shorebirds. Resightings of colour-banded knots confirmed that this is a separate population from the larger wintering population in Tierra del Fuego. All species of shorebirds captured in Maranhão were found to be infested with feather lice and mites. Body masses of knots in Maranhão were significantly lower than in Tierra del Fuego, and about half the birds were below the hypothesized fat-free mass of the species. Blood and feather samples were taken from 38 Knots for subsequent assessment of virus loads, and for detecting sites where primary feather moult had occurred. This will enable us to establish whether significant mortality is associated with pathogen loads and the energetic demands of delayed moulting. The small size of the Maranhão population and the loss of another 13,000 knots this winter from the Tierra del Fuego population means that both are now endangered. Brochures on the need for Red Knot conservation were designed and printed, and have been circulated among fishing communities and school classes in Maranhão.
Fil: Baker,Allan J.. Royal Ontario Museum; Canadá
Fil: González, Patricia M.. Fundación Inalafquen; Argentina
Fil: Serrano, Ines L.. CEMAVE, Centro Nacional de Pesquisa para Conservação das Aves Silvestres; Brasil
Fil: Júnior, Wallace R. T.. CEMAVE, Centro Nacional de Pesquisa para Conservação das Aves Silvestres; Brasil
Fil: Efe, Marcio A.. Universidade Federal de Alagoas; Brasil
Fil: Rice, Susan. Eastern Shore of Virginia National Wildlife Refuge; Estados Unidos
Fil: D'amico, Veronica Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentina
Fil: Rocha, Marcia C.. Belém, Pará; Brasil
Fil: Echave, María Eugenia. Fundación Inalafquen; Argentina
description To assess population size and the conservation status of the Red Knot Calidris canutus rufa population in Maranhão, N Brazil, an aerial census and field studies were conducted in February 2005. The aerial count showed a population of 7,575 Knots, which is down about 600 from a previous census in the 1980s. However, the count for all shorebird species combined was only 24,000 compared to 198,600 in the 1980s, paralleling a world-wide trend of population decline in shorebirds. Resightings of colour-banded knots confirmed that this is a separate population from the larger wintering population in Tierra del Fuego. All species of shorebirds captured in Maranhão were found to be infested with feather lice and mites. Body masses of knots in Maranhão were significantly lower than in Tierra del Fuego, and about half the birds were below the hypothesized fat-free mass of the species. Blood and feather samples were taken from 38 Knots for subsequent assessment of virus loads, and for detecting sites where primary feather moult had occurred. This will enable us to establish whether significant mortality is associated with pathogen loads and the energetic demands of delayed moulting. The small size of the Maranhão population and the loss of another 13,000 knots this winter from the Tierra del Fuego population means that both are now endangered. Brochures on the need for Red Knot conservation were designed and printed, and have been circulated among fishing communities and school classes in Maranhão.
publishDate 2005
dc.date.none.fl_str_mv 2005-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/105224
Baker,Allan J.; González, Patricia M.; Serrano, Ines L.; Júnior, Wallace R. T.; Efe, Marcio A.; et al.; Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005; International Wader Study Group; Wader Study Group Bulletin; 107; 12-2005; 10-18
0260-3799
CONICET Digital
CONICET
url http://hdl.handle.net/11336/105224
identifier_str_mv Baker,Allan J.; González, Patricia M.; Serrano, Ines L.; Júnior, Wallace R. T.; Efe, Marcio A.; et al.; Assessment of the wintering area of Red Knots in Maranhão, northern Brazil, in February 2005; International Wader Study Group; Wader Study Group Bulletin; 107; 12-2005; 10-18
0260-3799
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.waderstudygroup.org/article/3215/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv International Wader Study Group
publisher.none.fl_str_mv International Wader Study Group
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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