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Protein synthesis, growth and energetics in larval herring (Clupea harengus) at different feeding regimes Houlihan, D.F.; Pedersen, B.H.; Steffensen, J.F.; Brechin, J. (1995). Protein synthesis, growth and energetics in larval herring (Clupea harengus) at different feeding regimes. Fish Physiol. Biochem. 14(3): 195-208. https://dx.doi.org/10.1007/BF00004310 In: Fish Physiology and Biochemistry. Springer: Dordrecht. ISSN 0920-1742; e-ISSN 1573-5168

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Beschikbaar in	Auteurs
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Trefwoorden

Biochemical phenomena > Protein synthesis Metabolism > Protein metabolism > Animal nutrition > Protein turnover Population functions > Growth Marien/Kust

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Auteurs		Top
Houlihan, D.F. Pedersen, B.H. Steffensen, J.F. Brechin, J.

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Abstract

Rates of growth, protein synthesis and oxygen consumption were measured in herring larvae, Clupea harengus, in order to estimate the contribution that protein synthesis makes to oxygen consumption during rapid growth at 8°C. Protein synthesis rates were determined in larvae 9 to 17 d after hatching. Larvae were bathed in 3H phenylalanine for several hours and the free pool and protein-bound phenylalanine specific radioactivities were determined.Fractional rates of protein synthesis increased 5 to 11 fold with feeding after a period of fasting. Efficiencies of retention of synthesized protein were approximately 50% during rapid growth. Rapid growth in herring larvae thus appears to be characterized by moderate levels of protein turnover similar to those obtained for larger fish. Increases in growth rate occurred without changes in RNA concentration, i.e., the larvae increased the efficiency of RNA rapidly. Oxygen consumption rates were not correlated with growth rates. Protein synthesis was estimated to account for 79% of the oxygen consumption, and energy costs of protein synthesis were high, i.e., about 98 mmole O2 g-1 protein synthesized.

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