title: Nutrient content in the muscle and skin of fillets from farmed rainbow trout (Oncorhynchus mykiss).
abstract: The nutrient content in the muscle and edible skin parts of rainbow trout (Oncorhynchus mykiss) fillets, sampled at two growth stages, was evaluated. The average concentrations of protein and essential amino acids were higher in the muscle than in the skin. The chemical scores reached a value of 1.0 for the amino acids in the muscle and ranged from 0.40 (tryptophan) to 0.94 (threonine) in the skin. The average lipid content and the saturated fatty acids/polyunsaturated fatty acids and n-6/n-3 ratios were higher in the skin than in the muscle, whereas the proportion of docosahexaenoic acid (C22:6 n-3) was higher in the muscle. Significant differences were found for the essential minerals analysed, except for Cu. The concentrations of Na, K and Mg were higher and those of Ca, P, Fe, Mn and Zn were lower in the muscle than in the skin. Significant effects of the fish growth on the composition were detected.
authors.affiliation: Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040 Madrid, Spain. Electronic address: arebole@ucm.es.
authors.forename: A
authors.initials: A
authors.lastname: Rebolé
authors.affiliation: Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040 Madrid, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Velasco
authors.affiliation: Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040 Madrid, Spain.
authors.forename: M L
authors.initials: ML
authors.lastname: Rodríguez
authors.affiliation: Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040 Madrid, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Treviño
authors.affiliation: Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040 Madrid, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Alzueta
authors.affiliation: Dibaq Acuicultura, La Cruz 3, 40260 Fuentepelayo, Segovia, Spain.
authors.forename: J L
authors.initials: JL
authors.lastname: Tejedor
authors.affiliation: Departamento de Producción Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Avda. Puerta de Hierro s/n, 28040 Madrid, Spain.
authors.forename: L T
authors.initials: LT
authors.lastname: Ortiz
mesh_terms: D000818:Animals; D005227:Fatty Acids / Q000032:analysis*; D005504:Food Analysis; D009132:Muscles / Q000737:chemistry*; D017686:Oncorhynchus mykiss / Q000378:metabolism*; D012867:Skin / Q000737:chemistry*
chemical_list: D005227:Fatty Acids
keywords: Amino acids; Essential minerals; Farmed rainbow trout; Fatty acids; Proximate analysis