If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

The effect of metabolic rate on stable carbon and nitrogen isotope compositions in deer mice, Peromyscus maniculatus

$50.00 plus tax (Refund Policy)

Buy Article:

Abstract:

The stable isotopic compositions of nitrogen and carbon in animal tissues reflect diet. However, factors other than diet can also affect these stable isotope ratios, leading to misinterpretations of diet composition. To test the hypothesis that variation in metabolic rate alters the isotopic compositions of tissues, deer mice (Peromyscus maniculatus (Wagner, 1845)) were kept at three temperatures (thermoneutral (23 °C), cool (5 °C), and cold (-10 °C)) and fed ad libitum. The changes in carbon and nitrogen isotope compositions of liver associated with the thermoneutral versus cool and cold conditions were very small in comparison with those arising from differences in diet. We conclude that temperature-induced variations in metabolic rate are insufficient to produce differences in the stable carbon or nitrogen isotope compositions that could be mistaken for changes in diet.

Les compositions d’isotopes stables d’azote et de carbone dans les tissus animaux reflètent le régime alimentaire. Cependant, des facteurs autres que le régime peuvent affecter ces rapports d’isotopes stables, ce qui entraîne des interprétations erronées de la composition du régime alimentaire. Afin de tester l’hypothèse qui veut que la variation du taux métabolique affecte la composition isotopique des tissus, nous avons gardé des souris du crépuscule (Peromyscus maniculatus (Wagner, 1845)) à trois températures différentes, soit des régimes thermiques neutre (23 °C), frais (5 °C) et froid (-10 °C), et les avons nourries à volonté. Les modifications dans les compositions d’isotopes de carbone et d’azote dans le foie associées au régime thermique neutre par rapport à ceux des régimes frais et froids sont très petites par comparaison à celles qui proviennent de différences de régime alimentaire. Nous en concluons que les variations du taux métabolique causées par la température ne sont pas assez importantes pour produire des différences de composition des isotopes stables de carbone et d’azote qui pourraient être interprétées par erreur comme des changements de régime alimentaire.

Document Type: Research Article

Publication date: January 1, 2010

More about this publication?
  • Published since 1929, this monthly journal reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • Sample Issue
  • Reprints & Permissions
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more