Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia

Autores
Bulgarella, Mariana; Wilson, Robert E.; Kopuchian, Cecilia; Valqui, Thomas; McCracken, Kevin G.
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Crested Duck (Lophonetta specularioides) inhabits the Andes of South America from Tierra del Fuego to central Perú, with two subspecies (L. s. specularioides and L. s. alticola) inhabiting different ele- vational environments in the Andes from sea level to 5000 m. We evaluated morphological differences between the two subspecies of Crested Duck and evidence for Bergmann?s and Allen?s rules to gain a bet- ter understanding of the forces that have acted to shape geographic variation in morphology of highland and lowland populations. Overall body size of Crested Ducks differed between subspecies and between sexes. Male and female L. s. alticola from the central high Andes sampled at 3338?4611 m were larger than L. s. specularioides from southern Patagonia (< 934 m to sea level). L. s. alticola individuals of intermediate body size were found at mid elevations (1522?2552 m) in Mendoza, Argentina. Stepwise discriminant anal- ysis (DA) classified 96.1% of L. s. alticola and 100% of L. s. specularioides males correctly; 100% of females were classified correctly. Body mass, wing chord, tarsus length, and bill length were positively correlated with elevation in male L. s. alticola, whereas total tarsus was negatively correlated with elevation in male L. s. specularioides. Crested Ducks conform to Bergmann?s Rule. No evidence was found for Allen?s Rule. Inter- mediate size Crested Ducks, such as those found in Mendoza, Argentina, might result from introgression between L. s. alticola and L. s. specularioides, and/or natural selection on body size of individuals locally adapted to intermediate elevational habitats.
Fil: Bulgarella, Mariana. Institute of Arctic Biology, Department of Biology and Wildlife, and University of Alaska Museum, University of Alaska Fairbanks; Estados Unidos. University Of Alaska; Estados Unidos
Fil: Wilson, Robert E.. Institute of Arctic Biology, Department of Biology and Wildlife, and University of Alaska Museum, University of Alaska Fairbanks; Estados Unidos. University Of Alaska; Estados Unidos
Fil: Kopuchian, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
Fil: Valqui, Thomas. Louisiana State University; Estados Unidos
Fil: McCracken, Kevin G.. University Of Alaska; Estados Unidos
Materia
ANDES
CRESTED DUCK
GEOGRAPHIC VARIATION
MORPHOLOGY
ELEVATION
LOPHONETTA SPECULARIOIDES
PATAGONIA
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:11336/59918

id CONICETDig_a86f8bca01e51422c6ffd7e905ba163b
oai_identifier_str oai:ri.conicet.gov.ar:11336/59918
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and PatagoniaBulgarella, MarianaWilson, Robert E.Kopuchian, CeciliaValqui, ThomasMcCracken, Kevin G.ANDESCRESTED DUCKGEOGRAPHIC VARIATIONMORPHOLOGYELEVATIONLOPHONETTA SPECULARIOIDESPATAGONIAhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1The Crested Duck (Lophonetta specularioides) inhabits the Andes of South America from Tierra del Fuego to central Perú, with two subspecies (L. s. specularioides and L. s. alticola) inhabiting different ele- vational environments in the Andes from sea level to 5000 m. We evaluated morphological differences between the two subspecies of Crested Duck and evidence for Bergmann?s and Allen?s rules to gain a bet- ter understanding of the forces that have acted to shape geographic variation in morphology of highland and lowland populations. Overall body size of Crested Ducks differed between subspecies and between sexes. Male and female L. s. alticola from the central high Andes sampled at 3338?4611 m were larger than L. s. specularioides from southern Patagonia (< 934 m to sea level). L. s. alticola individuals of intermediate body size were found at mid elevations (1522?2552 m) in Mendoza, Argentina. Stepwise discriminant anal- ysis (DA) classified 96.1% of L. s. alticola and 100% of L. s. specularioides males correctly; 100% of females were classified correctly. Body mass, wing chord, tarsus length, and bill length were positively correlated with elevation in male L. s. alticola, whereas total tarsus was negatively correlated with elevation in male L. s. specularioides. Crested Ducks conform to Bergmann?s Rule. No evidence was found for Allen?s Rule. Inter- mediate size Crested Ducks, such as those found in Mendoza, Argentina, might result from introgression between L. s. alticola and L. s. specularioides, and/or natural selection on body size of individuals locally adapted to intermediate elevational habitats.Fil: Bulgarella, Mariana. Institute of Arctic Biology, Department of Biology and Wildlife, and University of Alaska Museum, University of Alaska Fairbanks; Estados Unidos. University Of Alaska; Estados UnidosFil: Wilson, Robert E.. Institute of Arctic Biology, Department of Biology and Wildlife, and University of Alaska Museum, University of Alaska Fairbanks; Estados Unidos. University Of Alaska; Estados UnidosFil: Kopuchian, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; ArgentinaFil: Valqui, Thomas. Louisiana State University; Estados UnidosFil: McCracken, Kevin G.. University Of Alaska; Estados UnidosNeotropical Ornithological Society2007-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/59918Bulgarella, Mariana; Wilson, Robert E.; Kopuchian, Cecilia; Valqui, Thomas; McCracken, Kevin G.; Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia; Neotropical Ornithological Society; Ornitologia Neotropical; 18; 4; 12-2007; 587-6021075-4377CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://sora.unm.edu/node/133062info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:10:14Zoai:ri.conicet.gov.ar:11336/59918instacron: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 10:10:14.751CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia
title Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia
spellingShingle Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia
Bulgarella, Mariana
ANDES
CRESTED DUCK
GEOGRAPHIC VARIATION
MORPHOLOGY
ELEVATION
LOPHONETTA SPECULARIOIDES
PATAGONIA
title_short Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia
title_full Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia
title_fullStr Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia
title_full_unstemmed Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia
title_sort Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia
dc.creator.none.fl_str_mv Bulgarella, Mariana
Wilson, Robert E.
Kopuchian, Cecilia
Valqui, Thomas
McCracken, Kevin G.
author Bulgarella, Mariana
author_facet Bulgarella, Mariana
Wilson, Robert E.
Kopuchian, Cecilia
Valqui, Thomas
McCracken, Kevin G.
author_role author
author2 Wilson, Robert E.
Kopuchian, Cecilia
Valqui, Thomas
McCracken, Kevin G.
author2_role author
author
author
author
dc.subject.none.fl_str_mv ANDES
CRESTED DUCK
GEOGRAPHIC VARIATION
MORPHOLOGY
ELEVATION
LOPHONETTA SPECULARIOIDES
PATAGONIA
topic ANDES
CRESTED DUCK
GEOGRAPHIC VARIATION
MORPHOLOGY
ELEVATION
LOPHONETTA SPECULARIOIDES
PATAGONIA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The Crested Duck (Lophonetta specularioides) inhabits the Andes of South America from Tierra del Fuego to central Perú, with two subspecies (L. s. specularioides and L. s. alticola) inhabiting different ele- vational environments in the Andes from sea level to 5000 m. We evaluated morphological differences between the two subspecies of Crested Duck and evidence for Bergmann?s and Allen?s rules to gain a bet- ter understanding of the forces that have acted to shape geographic variation in morphology of highland and lowland populations. Overall body size of Crested Ducks differed between subspecies and between sexes. Male and female L. s. alticola from the central high Andes sampled at 3338?4611 m were larger than L. s. specularioides from southern Patagonia (< 934 m to sea level). L. s. alticola individuals of intermediate body size were found at mid elevations (1522?2552 m) in Mendoza, Argentina. Stepwise discriminant anal- ysis (DA) classified 96.1% of L. s. alticola and 100% of L. s. specularioides males correctly; 100% of females were classified correctly. Body mass, wing chord, tarsus length, and bill length were positively correlated with elevation in male L. s. alticola, whereas total tarsus was negatively correlated with elevation in male L. s. specularioides. Crested Ducks conform to Bergmann?s Rule. No evidence was found for Allen?s Rule. Inter- mediate size Crested Ducks, such as those found in Mendoza, Argentina, might result from introgression between L. s. alticola and L. s. specularioides, and/or natural selection on body size of individuals locally adapted to intermediate elevational habitats.
Fil: Bulgarella, Mariana. Institute of Arctic Biology, Department of Biology and Wildlife, and University of Alaska Museum, University of Alaska Fairbanks; Estados Unidos. University Of Alaska; Estados Unidos
Fil: Wilson, Robert E.. Institute of Arctic Biology, Department of Biology and Wildlife, and University of Alaska Museum, University of Alaska Fairbanks; Estados Unidos. University Of Alaska; Estados Unidos
Fil: Kopuchian, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
Fil: Valqui, Thomas. Louisiana State University; Estados Unidos
Fil: McCracken, Kevin G.. University Of Alaska; Estados Unidos
description The Crested Duck (Lophonetta specularioides) inhabits the Andes of South America from Tierra del Fuego to central Perú, with two subspecies (L. s. specularioides and L. s. alticola) inhabiting different ele- vational environments in the Andes from sea level to 5000 m. We evaluated morphological differences between the two subspecies of Crested Duck and evidence for Bergmann?s and Allen?s rules to gain a bet- ter understanding of the forces that have acted to shape geographic variation in morphology of highland and lowland populations. Overall body size of Crested Ducks differed between subspecies and between sexes. Male and female L. s. alticola from the central high Andes sampled at 3338?4611 m were larger than L. s. specularioides from southern Patagonia (< 934 m to sea level). L. s. alticola individuals of intermediate body size were found at mid elevations (1522?2552 m) in Mendoza, Argentina. Stepwise discriminant anal- ysis (DA) classified 96.1% of L. s. alticola and 100% of L. s. specularioides males correctly; 100% of females were classified correctly. Body mass, wing chord, tarsus length, and bill length were positively correlated with elevation in male L. s. alticola, whereas total tarsus was negatively correlated with elevation in male L. s. specularioides. Crested Ducks conform to Bergmann?s Rule. No evidence was found for Allen?s Rule. Inter- mediate size Crested Ducks, such as those found in Mendoza, Argentina, might result from introgression between L. s. alticola and L. s. specularioides, and/or natural selection on body size of individuals locally adapted to intermediate elevational habitats.
publishDate 2007
dc.date.none.fl_str_mv 2007-12
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/11336/59918
Bulgarella, Mariana; Wilson, Robert E.; Kopuchian, Cecilia; Valqui, Thomas; McCracken, Kevin G.; Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia; Neotropical Ornithological Society; Ornitologia Neotropical; 18; 4; 12-2007; 587-602
1075-4377
CONICET Digital
CONICET
url http://hdl.handle.net/11336/59918
identifier_str_mv Bulgarella, Mariana; Wilson, Robert E.; Kopuchian, Cecilia; Valqui, Thomas; McCracken, Kevin G.; Elevational variation in body size of Crested Ducks (Lophonetta specularioides) from the central High Andes, Mendoza, and Patagonia; Neotropical Ornithological Society; Ornitologia Neotropical; 18; 4; 12-2007; 587-602
1075-4377
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://sora.unm.edu/node/133062
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
application/pdf
dc.publisher.none.fl_str_mv Neotropical Ornithological Society
publisher.none.fl_str_mv Neotropical Ornithological Society
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
_version_ 1844613989727731712
score 13.070432