caa a22 4500 388063114 CHVBK 20180307125126.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1017/S0007114598001330 doi S0007114598001330 pii (NATIONALLICENCE)cambridge-10.1017/S0007114598001330 Dietary fish oil and digestible protein modify susceptibility to lipid peroxidation in the muscle of rainbow trout (Oncorhynchus mykiss) and sea bass (Dicentrarchus labrax) [Elektronische Daten] The effects of dietary fish oil and digestible protein (DP) levels on muscle fatty acid composition and susceptibility to lipid peroxidation were studied in two representative fish species for human nutrition, from fresh and seawater, rainbow trout (Oncorhynchus mykiss) and European sea bass (Dicentrarchus labrax). In rainbow trout, higher concentrations of dietary fat and DP led to higher weight gain (g/d) (P = 0.001 and P = 0.043 respectively). Additionally, an interaction effect was observed in this species, since the effect of DP was only evident when the dietary fat concentration was low (P = 0.043). A similar tendency was also observed in European sea bass, although with less marked differences among nutritional treatments. Trout fed on diets with a higher concentration of dietary fat had higher concentrations of intramuscular total and neutral lipids in the dorsal muscle (P = 0.005). Increased levels of dietary DP led to significantly lower concentrations of polar lipids in the dorsal muscle of both rainbow trout (P = 0.005) and European sea bass (P = 0.006). In the neutral fraction of intramuscular lipids of dorsal muscle the concentration of n-3 fatty acids was positively affected by the dietary fat concentration in both rainbow trout (P = 0.04) and sea bass (P = 0.001). Muscle homogenates from trout and sea bass fed on diets rich in fish oil showed a significantly higher susceptibility to oxidation than muscle homogenates from fish fed on low-fat diets (P = 0.001). The higher DP concentration also increased susceptibility to oxidation. Moreover, in rainbow trout an interaction effect was observed where the pro-oxidant effect was of higher magnitude when the dietary concentration of both nutrients, fat and protein, was high (P = 0.004). Copyright © The Nutrition Society 1998 Muscle nationallicence Lipid peroxidation nationallicence Fish nutrition nationallicence Alvarez M. J. Departamento de Bioquímica y Biología Molecular IV Lopez-Bote C. J. Departamento de Producción Animal, Universidad Complutense de Madrid, Facultad de Veterinaria, 28040 Madrid, Spain Diez A. Departamento de Bioquímica y Biología Molecular IV Corraze G. Fish Nutrition Laboratory, Unité Mixte INRA-IFREMER, 64310 Saint Pée-sur-Nivelle, France Arzel J. Fish Nutrition Laboratory, Unité Mixte INRA-IFREMER, Centre de Brest IFREMER, 29280 Plouzané, France Dias J. Fish Nutrition Laboratory, Unité Mixte INRA-IFREMER, 64310 Saint Pée-sur-Nivelle, France Kaushik S. J. Fish Nutrition Laboratory, Unité Mixte INRA-IFREMER, 64310 Saint Pée-sur-Nivelle, France Bautista J. M. Departamento de Bioquímica y Biología Molecular IV British Journal of Nutrition Cambridge University Press 80/3(1998-09), 281-289 0007-1145 80:3<281 1998 80 BJN https://doi.org/10.1017/S0007114598001330 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0007114598001330 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Alvarez M. J. Departamento de Bioquímica y Biología Molecular IV NATIONALLICENCE 700 1- Lopez-Bote C. J. Departamento de Producción Animal, Universidad Complutense de Madrid, Facultad de Veterinaria, 28040 Madrid, Spain NATIONALLICENCE 700 1- Diez A. Departamento de Bioquímica y Biología Molecular IV NATIONALLICENCE 700 1- Corraze G. Fish Nutrition Laboratory, Unité Mixte INRA-IFREMER, 64310 Saint Pée-sur-Nivelle, France NATIONALLICENCE 700 1- Arzel J. Fish Nutrition Laboratory, Unité Mixte INRA-IFREMER, Centre de Brest IFREMER, 29280 Plouzané, France NATIONALLICENCE 700 1- Dias J. Fish Nutrition Laboratory, Unité Mixte INRA-IFREMER, 64310 Saint Pée-sur-Nivelle, France NATIONALLICENCE 700 1- Kaushik S. J. Fish Nutrition Laboratory, Unité Mixte INRA-IFREMER, 64310 Saint Pée-sur-Nivelle, France NATIONALLICENCE 700 1- Bautista J. M. Departamento de Bioquímica y Biología Molecular IV NATIONALLICENCE 773 0- British Journal of Nutrition Cambridge University Press 80/3(1998-09), 281-289 0007-1145 80:3<281 1998 80 BJN CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge