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dc.contributor.author
Sassi, Paola Lorena
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dc.contributor.author
Menéndez Sammartino, Josefina
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dc.contributor.author
Cuevas, Maria Fernanda
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dc.date.available
2019-11-11T18:37:27Z
dc.date.issued
2018-03
dc.identifier.citation
Sassi, Paola Lorena; Menéndez Sammartino, Josefina; Cuevas, Maria Fernanda; Geographic variation in life-history traits: factors shaping energy investment in reproduction in a highland dwelling rodent; Wiley Blackwell Publishing, Inc; Journal Of Zoology; 304; 3; 3-2018; 210-216
dc.identifier.issn
0952-8369
dc.identifier.uri
http://hdl.handle.net/11336/88507
dc.description.abstract
Variation in life-history traits is shaped by intrinsic and extrinsic factors. Climate influences the availability of energy and nutrients in the environment, and thus animals’ energy balance, their allocation of resources to reproduction and ultimately, fitness. Temperature is reported as a prevailing influence on animals’ investment in reproduction, and diverse hypotheses propose mechanisms by which it occurs. Central and external limits to energy acquisition have been traditionally assumed. Hence, digestive limitations, periods of low food availability or demanding cold conditions would restrict this input. However, under warm conditions endotherms also face the need to dissipate heat from metabolic processes. From this perspective, a high metabolic rate process, such as lactation, would be restricted under increasing ambient temperatures (Ta). Our research addresses the variation in reproductive parameters in Phyllotis xanthopygus, a rodent species broadly distributed in the west highlands and southern parts of South America. Across a pronounced elevation gradient in the central Andes Mountains we found that litter size is comparatively smaller in pregnant females collected at lower elevations. This is congruent with expectations from the heat dissipation limit hypothesis. To disentangle the role of temperature on this pattern, we bred individuals under two thermal treatments. We recorded no changes in the litter size, but pups’ body mass was lower at higher Ta during lactation, also in agreement with decreased metabolism. Offspring size and number are relevant to a species’ fitness. The evidence suggests that in P. xanthopygus these traits vary geographically and are shaped by Ta in the laboratory. A species that evolved in high altitudes, inhabits cold and temperate areas and is sensitive to Ta increases in the laboratory, appears as an excellent candidate to further explore the ecophysiology-thermal landscape interface, crucial to develop accurate predictive models of biodiversity dynamics.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ELEVATION GRADIENT
dc.subject
ENERGETIC TRADE-OFFS
dc.subject
GEOGRAPHIC VARIATION
dc.subject
LIFE-HISTORY TRAITS
dc.subject
PHYLLOTIS XANTHOPYGUS
dc.subject
REPRODUCTIVE INVESTMENT
dc.subject
SMALL MAMMAL
dc.subject
TEMPERATURE
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Geographic variation in life-history traits: factors shaping energy investment in reproduction in a highland dwelling rodent
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-10-16T20:41:54Z
dc.journal.volume
304
dc.journal.number
3
dc.journal.pagination
210-216
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Sassi, Paola Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; Argentina
dc.description.fil
Fil: Menéndez Sammartino, Josefina. Universidad Nacional de Cuyo. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Cuevas, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; Argentina
dc.journal.title
Journal Of Zoology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/jzo.12523
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://zslpublications.onlinelibrary.wiley.com/doi/abs/10.1111/jzo.12523
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