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Effects of exercise on<scp>l</scp>-carnitine and lipid metabolism in African catfish (Clarias gariepinus) fed different dietary<scp>l</scp>-carnitine and lipid levels
- Source :
- British Journal of Nutrition 103 (2010) 8, British Journal of Nutrition, 103(8), 1139-1150
- Publication Year :
- 2009
- Publisher :
- Cambridge University Press (CUP), 2009.
-
Abstract
- African catfish (Clarias gariepinus) were fed four isonitrogenous diets (34 % crude protein), each containing one of two lipid (100 or 180 g/kg) and twol-carnitine (15 or 1000 mg/kg) levels. After 81 d of feeding, thirty-two fish (body weight 32 g) from each dietary group were randomly selected, sixteen fish were induced to a 3-h swim (speed of 1·5 body length (BL)/s), while the other sixteen fish were kept under resting condition. Fish fed 1000 mgl-carnitine accumulated 3·5 and 5 times morel-carnitine in plasma and muscle, respectively, than fish fed the 15 mgl-carnitine. Musclel-carnitine content was significantly lower in exercised fish than in rested fish. High dietary lipid level (fish oil) led to an increase in musclen-3 PUFA content and a decrease in SFA and MUFA content. In liver, the increase in dietary lipid level resulted in an increased levels of bothn-6 andn-3 PUFA.l-carnitine supplementation significantly decreasedn-3 PUFA content. Exercise decreasedn-3 PUFA in both muscle and liver. Plasma lactate and lactate dehydrogenase, normally associated with increased glycolytic processes, were positively correlated with exercise and inversely correlated with dietaryl-carnitine level.l-carnitine supplementation reduced significantly the RQ from 0·72 to 0·63, and an interaction between dietaryl-carnitine and lipid was observed (P
- Subjects :
- Animal Nutrition
nutritional supplements
Medicine (miscellaneous)
chemistry.chemical_compound
Aquaculture and Fisheries
salmo-salar l
Catfishes
chemistry.chemical_classification
Nutrition and Dietetics
biology
Aquacultuur en Visserij
Blood Proteins
Fish oil
Lipids
Diervoeding
Liver
high-fat diets
medicine.drug
Polyunsaturated fatty acid
Catfish
Clarias gariepinus
medicine.medical_specialty
bream pagrus-major
Dietary lipid
exhaustive exercise
Fish Oils
Animal science
Carnitine
Physical Conditioning, Animal
Internal medicine
Lactate dehydrogenase
Fatty Acids, Omega-3
medicine
Animals
Muscle, Skeletal
Swimming
Body Weight
Lipid metabolism
intermediary metabolism
biology.organism_classification
Animal Feed
Dietary Fats
rainbow-trout
Endocrinology
chemistry
swimming performance
growth-performance
WIAS
Energy Intake
trout oncorhynchus-mykiss
Subjects
Details
- ISSN :
- 14752662 and 00071145
- Volume :
- 103
- Database :
- OpenAIRE
- Journal :
- British Journal of Nutrition
- Accession number :
- edsair.doi.dedup.....fc4146ecfc75594ff77262ba8a6e64e0