English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/128738
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Sperm competition and the evolution of sperm design in mammals

AutorTourmente, Maximiliano ; Gomendio, Montserrat ; Roldán, Eduardo R. S.
Fecha de publicación13-ene-2011
EditorBioMed Central
CitaciónBMC Evolutionary Biology 11: 12 (2011)
ResumenBackground. The influence of sperm competition upon sperm size has been a controversial issue during the last 20 years which remains unresolved for mammals. The hypothesis that, when ejaculates compete with rival males, an increase in sperm size would make sperm more competitive because it would increase sperm swimming speed, has generated contradictory results from both theoretical and empirical studies. In addition, the debate has extended to which sperm components should increase in size: the midpiece to accommodate more mitochondria and produce more energy to fuel motility, or the principal piece to generate greater propulsion forces. Results. In this study we examined the influence of sperm competition upon sperm design in mammals using a much larger data set (226 species) than in previous analyses, and we corrected for phylogenetic effects by using a more complete and resolved phylogeny, and more robust phylogenetic control methods. Our results show that, as sperm competition increases, all sperm components increase in an integrated manner and sperm heads become more elongated. The increase in sperm length was found to be associated with enhanced swimming velocity, an adaptive trait under sperm competition. Conclusions. We conclude that sperm competition has played an important role in the evolution of sperm design in mammals, and discuss why previous studies have failed to detect it. © 2011 Tourmente et al; licensee BioMed Central Ltd.
URIhttp://hdl.handle.net/10261/128738
DOI10.1186/1471-2148-11-12
Identificadoresdoi: 10.1186/1471-2148-11-12
e-issn: 1471-2148
Aparece en las colecciones: (MNCN) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
BMC Evolutionary Biology 2011, 1112.pdf506,47 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.