Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats

Studies of metabolic capacities in rodents have been largely studied at an inter-specific levels, but physiological capacities of populations belonging to the same species have received lesser attention. Here we studied the maximum and basal metabolic rates of two populations of the rodent Chroeomys...

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Autores principales:	Novoa,F. Fernando, Rivera-hutinel,Antonio, rosenmann,Mario, Sabat,Pablo
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2005
Materias:	basal metabolic rate Chroeomys olivaceus maximum metabolic rate population phenotypic plasticity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200004
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spelling	oai:scielo:S0716-078X20050002000042014-08-12Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitatsNovoa,F. FernandoRivera-hutinel,Antoniorosenmann,MarioSabat,Pablo basal metabolic rate Chroeomys olivaceus maximum metabolic rate population phenotypic plasticity Studies of metabolic capacities in rodents have been largely studied at an inter-specific levels, but physiological capacities of populations belonging to the same species have received lesser attention. Here we studied the maximum and basal metabolic rates of two populations of the rodent Chroeomys olivaceus dwelling in habitats with contrasting temperature and rainfall regimes, and to test if differences in metabolic capacities are due to local adaptation or acclimatization effect. After four weeks of acclimation to 25 ºC and 10 ºC, the BMR and MMR were determined in individuals from the northern population of Caleta Loa, and the southern population of La Picada. Individuals from La Picada population were heavier than those from Caleta Loa. MMR and BMR exhibited higher values in cold acclimated animals compared with warm-acclimated animals. Besides, BMR, but not MMR, was lower in Caleta Loa individuals, in spite of the acclimation treatment. Hence, the differences in the metabolic capacities and the response to acclimation of C. olivaceus populations appear to be an evolutionary response to the environmental cuesinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.78 n.2 20052005-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200004en10.4067/S0716-078X2005000200004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	basal metabolic rate Chroeomys olivaceus maximum metabolic rate population phenotypic plasticity
spellingShingle	basal metabolic rate Chroeomys olivaceus maximum metabolic rate population phenotypic plasticity Novoa,F. Fernando Rivera-hutinel,Antonio rosenmann,Mario Sabat,Pablo Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats
description	Studies of metabolic capacities in rodents have been largely studied at an inter-specific levels, but physiological capacities of populations belonging to the same species have received lesser attention. Here we studied the maximum and basal metabolic rates of two populations of the rodent Chroeomys olivaceus dwelling in habitats with contrasting temperature and rainfall regimes, and to test if differences in metabolic capacities are due to local adaptation or acclimatization effect. After four weeks of acclimation to 25 ºC and 10 ºC, the BMR and MMR were determined in individuals from the northern population of Caleta Loa, and the southern population of La Picada. Individuals from La Picada population were heavier than those from Caleta Loa. MMR and BMR exhibited higher values in cold acclimated animals compared with warm-acclimated animals. Besides, BMR, but not MMR, was lower in Caleta Loa individuals, in spite of the acclimation treatment. Hence, the differences in the metabolic capacities and the response to acclimation of C. olivaceus populations appear to be an evolutionary response to the environmental cues
author	Novoa,F. Fernando Rivera-hutinel,Antonio rosenmann,Mario Sabat,Pablo
author_facet	Novoa,F. Fernando Rivera-hutinel,Antonio rosenmann,Mario Sabat,Pablo
author_sort	Novoa,F. Fernando
title	Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats
title_short	Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats
title_full	Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats
title_fullStr	Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats
title_full_unstemmed	Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats
title_sort	intraspecific differences in metabolic rate of chroeomys olivaceus (rodentia: muridae): the effect of thermal acclimation in arid and mesic habitats
publisher	Sociedad de Biología de Chile
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200004
work_keys_str_mv	AT novoaffernando intraspecificdifferencesinmetabolicrateofchroeomysolivaceusrodentiamuridaetheeffectofthermalacclimationinaridandmesichabitats AT riverahutinelantonio intraspecificdifferencesinmetabolicrateofchroeomysolivaceusrodentiamuridaetheeffectofthermalacclimationinaridandmesichabitats AT rosenmannmario intraspecificdifferencesinmetabolicrateofchroeomysolivaceusrodentiamuridaetheeffectofthermalacclimationinaridandmesichabitats AT sabatpablo intraspecificdifferencesinmetabolicrateofchroeomysolivaceusrodentiamuridaetheeffectofthermalacclimationinaridandmesichabitats
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Intraspecific differences in metabolic rate of Chroeomys olivaceus (Rodentia: Muridae): the effect of thermal acclimation in arid and mesic habitats

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