Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast

Autores
Marquez, Federico; Van Der Molen, Silvina
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Ensis macha has a wide distribution along the Pacific and Atlantic southern coasts of South America. The pattern of morphological shell variation of this razor clam was analysed in 12 populations sampled along its whole Atlantic distribution, covering a latitudinal range of 3,700 km. The southernmost extant population of E. macha was recorded in the Beagle Channel. Variation in shell outline was assessed using elliptic Fourier analysis of adult individuals followed by different multivariate analyses. Significant shell-shape variation was found along the latitudinal range. Elliptical Fourier analysis revealed that trends in shell slenderness and curvature were associated mainly with salinity and water depth of the localities. Each locality presented a distinct shell shape, different from all other localities. Nevertheless, the populations could be grouped into four large assemblages between which a latitudinal gradient of shell shape was observed. Phenotypic divergence in shell shape is suggestive of population differentiation, but assessing the underlying processes is not straightforward because of the complex interaction between genetic and environmental factors. The possible evolutionary processes that mediate the effects of environmental variables and geographical distances on the shell-shape variation are discussed.
Fil: Marquez, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Van Der Molen, Silvina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Materia
Phenotypic Variation
Razor Clam
Shell Shape
Gene Flow
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:11336/93703
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coastMarquez, FedericoVan Der Molen, SilvinaPhenotypic VariationRazor ClamShell ShapeGene Flowhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Ensis macha has a wide distribution along the Pacific and Atlantic southern coasts of South America. The pattern of morphological shell variation of this razor clam was analysed in 12 populations sampled along its whole Atlantic distribution, covering a latitudinal range of 3,700 km. The southernmost extant population of E. macha was recorded in the Beagle Channel. Variation in shell outline was assessed using elliptic Fourier analysis of adult individuals followed by different multivariate analyses. Significant shell-shape variation was found along the latitudinal range. Elliptical Fourier analysis revealed that trends in shell slenderness and curvature were associated mainly with salinity and water depth of the localities. Each locality presented a distinct shell shape, different from all other localities. Nevertheless, the populations could be grouped into four large assemblages between which a latitudinal gradient of shell shape was observed. Phenotypic divergence in shell shape is suggestive of population differentiation, but assessing the underlying processes is not straightforward because of the complex interaction between genetic and environmental factors. The possible evolutionary processes that mediate the effects of environmental variables and geographical distances on the shell-shape variation are discussed.Fil: Marquez, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Van Der Molen, Silvina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaOxford University Press2011-05info: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/11336/93703Marquez, Federico; Van Der Molen, Silvina; Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast; Oxford University Press; Journal of Molluscan Studies; 77; 2; 5-2011; 123-1280260-1230CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mollus/eyq044info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mollus/article/77/2/123/1064965info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:10:44Zoai:ri.conicet.gov.ar:11336/93703instacron: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:34982025-09-03 10:10:45.505CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast
title Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast
spellingShingle Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast
Marquez, Federico
Phenotypic Variation
Razor Clam
Shell Shape
Gene Flow
title_short Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast
title_full Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast
title_fullStr Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast
title_full_unstemmed Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast
title_sort Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast
dc.creator.none.fl_str_mv Marquez, Federico
Van Der Molen, Silvina
author Marquez, Federico
author_facet Marquez, Federico
Van Der Molen, Silvina
author_role author
author2 Van Der Molen, Silvina
author2_role author
dc.subject.none.fl_str_mv Phenotypic Variation
Razor Clam
Shell Shape
Gene Flow
topic Phenotypic Variation
Razor Clam
Shell Shape
Gene Flow
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Ensis macha has a wide distribution along the Pacific and Atlantic southern coasts of South America. The pattern of morphological shell variation of this razor clam was analysed in 12 populations sampled along its whole Atlantic distribution, covering a latitudinal range of 3,700 km. The southernmost extant population of E. macha was recorded in the Beagle Channel. Variation in shell outline was assessed using elliptic Fourier analysis of adult individuals followed by different multivariate analyses. Significant shell-shape variation was found along the latitudinal range. Elliptical Fourier analysis revealed that trends in shell slenderness and curvature were associated mainly with salinity and water depth of the localities. Each locality presented a distinct shell shape, different from all other localities. Nevertheless, the populations could be grouped into four large assemblages between which a latitudinal gradient of shell shape was observed. Phenotypic divergence in shell shape is suggestive of population differentiation, but assessing the underlying processes is not straightforward because of the complex interaction between genetic and environmental factors. The possible evolutionary processes that mediate the effects of environmental variables and geographical distances on the shell-shape variation are discussed.
Fil: Marquez, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
Fil: Van Der Molen, Silvina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
description Ensis macha has a wide distribution along the Pacific and Atlantic southern coasts of South America. The pattern of morphological shell variation of this razor clam was analysed in 12 populations sampled along its whole Atlantic distribution, covering a latitudinal range of 3,700 km. The southernmost extant population of E. macha was recorded in the Beagle Channel. Variation in shell outline was assessed using elliptic Fourier analysis of adult individuals followed by different multivariate analyses. Significant shell-shape variation was found along the latitudinal range. Elliptical Fourier analysis revealed that trends in shell slenderness and curvature were associated mainly with salinity and water depth of the localities. Each locality presented a distinct shell shape, different from all other localities. Nevertheless, the populations could be grouped into four large assemblages between which a latitudinal gradient of shell shape was observed. Phenotypic divergence in shell shape is suggestive of population differentiation, but assessing the underlying processes is not straightforward because of the complex interaction between genetic and environmental factors. The possible evolutionary processes that mediate the effects of environmental variables and geographical distances on the shell-shape variation are discussed.
publishDate 2011
dc.date.none.fl_str_mv 2011-05
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/11336/93703
Marquez, Federico; Van Der Molen, Silvina; Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast; Oxford University Press; Journal of Molluscan Studies; 77; 2; 5-2011; 123-128
0260-1230
CONICET Digital
CONICET
url http://hdl.handle.net/11336/93703
identifier_str_mv Marquez, Federico; Van Der Molen, Silvina; Intraspecific shell-shape variation in the razor clam Ensis macha along the Patagonian coast; Oxford University Press; Journal of Molluscan Studies; 77; 2; 5-2011; 123-128
0260-1230
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1093/mollus/eyq044
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mollus/article/77/2/123/1064965
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 Oxford University Press
publisher.none.fl_str_mv Oxford University Press
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 13.13397

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