Metabolic organization of liver and somatic muscle of landlocked sea lamprey,Petromyzon marinus, during the spawning migration
- 1 May 1995
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Zoology
- Vol. 73 (5), 916-923
- https://doi.org/10.1139/z95-107
Abstract
The metabolic organization of liver and muscle of the landlocked sea lamprey, Petromyzon marinus, during the spring spawning migration was assessed by measuring activities of key enzymes for several metabolic pathways, the oxidative properties of mitochondria, and plasma concentrations of nonesterified fatty acids (NEFAs) and free amino acids. These determinations indicate that several metabolic sources are used to fuel the energy requirements of muscle. Lamprey muscle has a high capacity to oxidize lipids but the plasma NEFAs are lower than those reported for other species. Of the NEFAs measured in plasma, 18:0 was prominent, accounting for 23% of the total NEFA content of the plasma. High plasma concentrations of ketogenic amino acids and high levels of tissue ketogenic/ketolytic enzyme activities indicate that ketone bodies may also be a major fuel source for migrating sea lampreys. Based on mitochondrial oxidation and enzyme measurements, glutamine catabolism in somatic muscle of lampreys is less important than in other fish red muscle.Keywords
This publication has 31 references indexed in Scilit:
- Effects of exercise on plasma nonesterified fatty acids and free amino acids in Arctic char (Salvelinus alpinus)Journal of Experimental Zoology, 1995
- Plasma nonesterified fatty acids of marine teleost and elasmobranch fishesMarine Biology, 1993
- Glutamine metabolism in elasmobranch and agnathan muscleJournal of Experimental Zoology, 1992
- Short‐term effects of triiodothyronine on the bowfin, Amia calva (holostei), and the lake char, Salvelinus namaycush (teleostei)Journal of Experimental Zoology, 1992
- The effects of tricaine methanesulfonate (MS-222) on plasma nonesterified fatty acids in rainbow trout,Oncorhynchus mykissLipids, 1991
- Effects of Temperature on the Oxidation of Fatty Acids, Acyl Carnitines, and Ketone Bodies by Mitochondria Isolated from the Liver of the Lake Charr,Salvelinus namaycushCanadian Journal of Fisheries and Aquatic Sciences, 1989
- The lipid composition and biochemistry of freshwater fishProgress in Lipid Research, 1987
- A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye bindingAnalytical Biochemistry, 1976
- Fat and carbohydrate reserves in the river lamprey during spawning migrationLife Sciences, 1965
- A Simple and Rapid Assay of Oxidative PhosphorylationNature, 1955