Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)

Autores
Bidau, Claudio Juan; Medina, Alonso Ismael
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We studied sexual size dimorphism (SSD) and testes size allometry in 97 natural populations, including 39 nominal species and 19 unnamed or undescribed forms, of tuco-tucos ( Ctenomys ) from Argentina, Bolivia, Chile, Paraguay, and Uruguay in order to gain insight on the existence of sperm competition in these solitary, territorial, and possibly polygynic subterranean rodents. Our results indicated that sex-biased SSD occurs within the genus and also within lower taxa. SSD conforms to Rensch ’ s rule. Testes size showed a strong negative allo metry when compared with male body mass both across and within species, clearly suggesting the operation of sperm competition in this genus. Thus, within a Ctenomys population, small males would invest more than larger males in testes growth and thus in ejaculate quality, which would counterbalance their presumably lower chances of accessing females due to their smaller body size.
Fil: Bidau, Claudio Juan. Instituto Oswaldo Cruz; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Medina, Alonso Ismael. Universidad Nacional del Comahue. Instituto de Biologia Marina y Pesquera Almirante Storni; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Renschs Rule
Sexual Size Dimorphism
Sexual Selection
Testis/Body-Size
Allometry
Tuco Tucos
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:11336/17651
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)Bidau, Claudio JuanMedina, Alonso IsmaelRenschs RuleSexual Size DimorphismSexual SelectionTestis/Body-SizeAllometryTuco Tucoshttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1We studied sexual size dimorphism (SSD) and testes size allometry in 97 natural populations, including 39 nominal species and 19 unnamed or undescribed forms, of tuco-tucos ( Ctenomys ) from Argentina, Bolivia, Chile, Paraguay, and Uruguay in order to gain insight on the existence of sperm competition in these solitary, territorial, and possibly polygynic subterranean rodents. Our results indicated that sex-biased SSD occurs within the genus and also within lower taxa. SSD conforms to Rensch ’ s rule. Testes size showed a strong negative allo metry when compared with male body mass both across and within species, clearly suggesting the operation of sperm competition in this genus. Thus, within a Ctenomys population, small males would invest more than larger males in testes growth and thus in ejaculate quality, which would counterbalance their presumably lower chances of accessing females due to their smaller body size.Fil: Bidau, Claudio Juan. Instituto Oswaldo Cruz; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Medina, Alonso Ismael. Universidad Nacional del Comahue. Instituto de Biologia Marina y Pesquera Almirante Storni; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaWalter de Gruyter & Co2013-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17651Bidau, Claudio Juan; Medina, Alonso Ismael; Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae) ; Walter de Gruyter & Co; Mammalia; 77; 1; 2-2013; 1-130025-1461enginfo:eu-repo/semantics/altIdentifier/doi/10.1515/mammalia-2012-0051info:eu-repo/semantics/altIdentifier/url/https://www.degruyter.com/view/j/mamm.2013.77.issue-1/mammalia-2012-0051/mammalia-2012-0051.xmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:00:19Zoai:ri.conicet.gov.ar:11336/17651instacron: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 10:00:20.193CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)
title Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)
spellingShingle Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)
Bidau, Claudio Juan
Renschs Rule
Sexual Size Dimorphism
Sexual Selection
Testis/Body-Size
Allometry
Tuco Tucos
title_short Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)
title_full Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)
title_fullStr Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)
title_full_unstemmed Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)
title_sort Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae)
dc.creator.none.fl_str_mv Bidau, Claudio Juan
Medina, Alonso Ismael
author Bidau, Claudio Juan
author_facet Bidau, Claudio Juan
Medina, Alonso Ismael
author_role author
author2 Medina, Alonso Ismael
author2_role author
dc.subject.none.fl_str_mv Renschs Rule
Sexual Size Dimorphism
Sexual Selection
Testis/Body-Size
Allometry
Tuco Tucos
topic Renschs Rule
Sexual Size Dimorphism
Sexual Selection
Testis/Body-Size
Allometry
Tuco Tucos
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We studied sexual size dimorphism (SSD) and testes size allometry in 97 natural populations, including 39 nominal species and 19 unnamed or undescribed forms, of tuco-tucos ( Ctenomys ) from Argentina, Bolivia, Chile, Paraguay, and Uruguay in order to gain insight on the existence of sperm competition in these solitary, territorial, and possibly polygynic subterranean rodents. Our results indicated that sex-biased SSD occurs within the genus and also within lower taxa. SSD conforms to Rensch ’ s rule. Testes size showed a strong negative allo metry when compared with male body mass both across and within species, clearly suggesting the operation of sperm competition in this genus. Thus, within a Ctenomys population, small males would invest more than larger males in testes growth and thus in ejaculate quality, which would counterbalance their presumably lower chances of accessing females due to their smaller body size.
Fil: Bidau, Claudio Juan. Instituto Oswaldo Cruz; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Medina, Alonso Ismael. Universidad Nacional del Comahue. Instituto de Biologia Marina y Pesquera Almirante Storni; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description We studied sexual size dimorphism (SSD) and testes size allometry in 97 natural populations, including 39 nominal species and 19 unnamed or undescribed forms, of tuco-tucos ( Ctenomys ) from Argentina, Bolivia, Chile, Paraguay, and Uruguay in order to gain insight on the existence of sperm competition in these solitary, territorial, and possibly polygynic subterranean rodents. Our results indicated that sex-biased SSD occurs within the genus and also within lower taxa. SSD conforms to Rensch ’ s rule. Testes size showed a strong negative allo metry when compared with male body mass both across and within species, clearly suggesting the operation of sperm competition in this genus. Thus, within a Ctenomys population, small males would invest more than larger males in testes growth and thus in ejaculate quality, which would counterbalance their presumably lower chances of accessing females due to their smaller body size.
publishDate 2013
dc.date.none.fl_str_mv 2013-02
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/11336/17651
Bidau, Claudio Juan; Medina, Alonso Ismael; Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae) ; Walter de Gruyter & Co; Mammalia; 77; 1; 2-2013; 1-13
0025-1461
url http://hdl.handle.net/11336/17651
identifier_str_mv Bidau, Claudio Juan; Medina, Alonso Ismael; Sexual size dimorphism and testis size allometry in tuco-tucos (Rodentia: Ctenomyidae) ; Walter de Gruyter & Co; Mammalia; 77; 1; 2-2013; 1-13
0025-1461
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1515/mammalia-2012-0051
info:eu-repo/semantics/altIdentifier/url/https://www.degruyter.com/view/j/mamm.2013.77.issue-1/mammalia-2012-0051/mammalia-2012-0051.xml
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 Walter de Gruyter & Co
publisher.none.fl_str_mv Walter de Gruyter & Co
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_ 1842269632723943424
score 13.13397

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