Interplay between metabolic rate and diet quality in the South American fox, Pseudalopex culpaeus

SILVA, SI; Jaksic, FA; Bozinovic F.

Abstract

We studied the metabolic costs associated with the ingestion of peppertree fruits (Schinus molle) in the culpeo fox, Pseudalopex culpaeus, the second largest canid in South America. Throughout its range of distribution, this fox feeds on rodents and other small vertebrates, and also on peppertree fruits, which represent 98% of total fruits consumed in semiarid Chile. Peppertree contains a high diversity of phytochemicals. Foxes feeding on diets containing rats and peppertree fruits (mixed diets) exhibited a 98.9% increase in basal rate of metabolism when compared to rat-acclimated foxes. Thus, acute ingestion of chemically defended fruits has an energetic cost for the fox, reflected in higher values of basal metabolism. Increased metabolic rates may be associated with increased protein synthesis for detoxification and for tissue repair, including the production of biotransformation enzymes. © 2003 Elsevier Science Inc. All rights reserved.

Más información

Título según WOS: Interplay between metabolic rate and diet quality in the South American fox, Pseudalopex culpaeus
Título según SCOPUS: Interplay between metabolic rate and diet quality in the South American fox, Pseudalopex culpaeus
Título de la Revista: COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
Volumen: 137
Número: 1
Editorial: Elsevier Science Inc.
Fecha de publicación: 2004
Página de inicio: 33
Página final: 38
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S1095643303002782
DOI:

10.1016/j.cbpb.2003.09.022

Notas: ISI, SCOPUS