Nutritional homeostasis in carnivorous southern catfish (Silurus meridionalis): is there a mechanism for increased energy expenditure during carbohydrate overfeeding?
| Autor: | S.J. Fu, X.J. Xie |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
medicine.medical_specialty
Facultative Physiology Metabolism Biology Carbohydrate Diet induced thermogenesis Biochemistry Endocrinology Predatory fish Internal medicine Dietary Carbohydrates medicine Animals Homeostasis Food science Specific dynamic action Energy Metabolism Molecular Biology Catfishes Catfish |
| Zdroj: | Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology. 139:359-363 |
| ISSN: | 1095-6433 |
| DOI: | 10.1016/j.cbpb.2004.10.003 |
| Popis: | In previous growth experiments with carnivorous southern catfish (Silurus meridionalis), the non-fecal energy lose was positively related to dietary. carbohydrate level. To test whether metabolic energy expenditure accounts for such energy loss, an experiment was performed with southern catfish juveniles (33.2-71.9 g) to study the effect of dietary carbohydrate level on fasting metabolic rate and specific dynamic action (SDA) at 27.5 degreesC. The fasting metabolic rate in this catfish was increased with dietary carbohydrate level, and the specific dynamic action (SDA) coefficient (energy expended on SDA as percent of assimilated energy) was not affected by dietary carbohydrate level. The results suggest that in southern catfish, carbohydrate overfeeding increases metabolic rate to oxidize unwanted assimilated carbohydrate. A discussion on the poor capacity of intermediate metabolism for adapting dietary carbohydrate in carnivorous fish and its possible relationship with facultative component of SDA was also documented in this paper. (C) 2004 Elsevier Inc. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect