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Effect of dietary avoparcin on performances and carcass composition in rainbow trout, Oncorhynchus mykiss (Walbaum)
Author(s) -
Zoccarato I,
Gasco L,
Leveroni Calvi S,
Fortina R,
Bianchini M L,
Rollin X
Publication year - 1995
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1995.tb00924.x
Subject(s) - rainbow trout , biology , flesh , zoology , feed conversion ratio , composition (language) , food science , body weight , fishery , fish <actinopterygii> , endocrinology , linguistics , philosophy
Two levels (40 or 80 mg kg −1 ) of avoparcin were tested as a growth promoter in rainbow trout, Oncorhynchus mykiss (Walbaum), fed for 14 weeks. At 80 mg kg‐ 1 the weight gain was higher (P <0.05) than in the unsupplemented control or at the 40 mg kg‐ 1 dose. At either dose, the feed conversion rate and the protein efficiency ratio were more favourable (P <0.05) than in the control. Inclusion of the antibiotic significantly improved (P < 0.05) the apparent digestibility of lipids. The lipid content of flesh was significantly increased by inclusion of avoparcin in the diet; moreover, at the high level of inclusion the content of some unsaturated fatty acids (18:3ω3 and 20:5ω3) appeared to be significantly increased. No avoparcin residues were detected in the flesh.