Nom du corpus

Corpus Systématique Animale

Titre du document

The correlation between demography and metabolic rate: a test using the beach vole ( Microtus breweri ) and the meadow vole ( Microtus pennsylvanicus )

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Energetics
  • Metabolic rate
  • Demography
  • Microtus
Nom du fichier dans la ressource
Mammiferes_v2b_01781
Auteur(s)
  • Allen Kurta 1
  • Michael Ferkin 2
Affiliation(s)
  • 1) Department of Biology, Eastern Michigan University, 48197, Ypsilanti, MI, USA
  • 2) Department of Psychology, University of California, 94720, Berkeley, CA, USA
Résumé

This study examines the hypothesis that mammalian species with wide fluctuations in population size will have greater metabolic rates than species with smaller population fluctuations. We tested this hypothesis using two microtine rodents — the beach vole (Microtus breweri) and the meadow vole (M. pennsylvanicus). Although these species experience similar climatic regimes, eat similar foods, and have a very close phylogenetic relationship, they show marked differences in demography. Microtus pennsylvanicus is prone to large supraannual fluctuations in population size, while M. breweri is essentially acyclical. Metabolic rate (oxygen consumption) of each species was measured using open-flow respirometry at ambient temperatures ranging from 2 to 34° C. Basal metabolic rate of M. pennsylvanicus (1.81 ml O2 g?1 h?1) was significantly greater than that of M. breweri (1.39 ml O2 g?1 h?1). The lower critical temperature, estimated by continuous two-phase regression, was 28.9° C for M. pennsylvanicus and 29.8° C for M. breweri. Regression lines below thermoneutrality did not differ in slope, but the elevation for M. pennsylvanicus was significantly higher. Thus, M. pennsylvanicus has a higher metabolic rate at all temperatures examined. These results support the hypothesis that metabolic rate is positively correlated with the extent of population fluctuation. We suggest that further evidence for, or against, this hypothesis should be found by comparing closely matched species pairs, rather than resorting to confounded allometric comparisons of ecologically and phylogenetically diverse taxa.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - ecology
Identifiant ISTEX
748F7A3050F5D1E72C6F8512074F0271E789437A
Revue

Oecologia

Année de publication
1991
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.323
Sous-corpus
  • Mammiferes
Type de publication
Journal
ark:/67375/1BB-711X7LT0-V
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