The effect of short-term fasting and a single meal on protein synthesis and oxygen consumption in cod,Gadus morhua |
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Authors: | A R Lyndon D F Houlihan S J Hall |
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Institution: | (1) Department of Zoology, University of Aberdeen, Tillydrone Avenue, AB9 2TN Aberdeen, UK;(2) S.O.A.F.D. Marine Laboratory, Victoria Road, PO Box 101, AB9 8DB Aberdeen, UK;(3) Present address: Department of Biological Sciences, University of Exeter, Prince of Wales Road, EX4 4PS Exeter, UK |
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Abstract: | Summary Rates of protein synthesis and oxygen consumption (
O2) in cod were compared in both fasted and refed animals. During a 14-day fast both protein synthesis and respiration rates fell to stable values after 6 days. When a meal of whole sandeel at 6% body weight was fed to fish fasted for 6 days, protein synthesis and (
O2) increased to a maximum at between 12 and 18 h after feeding. Peak (
O2) was about twice the pre-feeding values, while whole animal protein synthesis increased four-fold. There were differences between tissues in the timing of maximum protein synthesis; the liver and stomach responded faster than the remainder of the body. Maximum protein synthesis rates in the liver and stomach occurred at 6 h after feeding, at which time their calculated contribution to total (
O2) was 11%. Similar calculations suggested that the integrated increment in whole animal protein synthesis contributed between 23% and 44% of the post-prandial increase in (
O2). It was concluded that protein synthesis is an important contributor to increased (
O2) after feeding in cod.Abbreviations
A
s
absolute rate of protein synthesis
- ASDA
apparent specific dynamic action
- ATP
adenosine triphosphate
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k
s
fractional rate of protein synthesis
-
k
s/RNA
amount of protein synthesized per unit RNA
- (
O2)
oxygen consumption
- PCA
perchloric acid
- RNA
ribonucleic acid |
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Keywords: | Fasting Refeeding Oxygen consumption Protein synthesis Cod Gadus morhua |
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