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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/59918
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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 |
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1844613989727731712 |
score |
13.070432 |