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Genetic variability in residual feed intake in rainbow trout clones and testing of indirect selection criteria ArchiMer
Grima, Laure; Quillet, E; Boujard, Thierry; Robert Granie, C; Chatain, Beatrice; Mambrini, M.
Little is known about the genetic basis of residual feed intake (RFI) variation in fish, since this trait is highly sensitive to environmental influences, and feed intake of individuals is difficult to measure accurately. The purpose of this work was (i) to assess the genetic variability of RFI estimated by an X-ray technique and (ii) to develop predictive criteria for RFI. Two predictive criteria were tested: loss of body weight during feed deprivation and compensatory growth during re-feeding. Ten heterozygous rainbow trout clones were used. Individual intake and body weight were measured three times at three-week intervals. Then, individual body weight was recorded after two cycles of a three-week feed deprivation followed by a three-week re-feeding....
Tipo: Text Palavras-chave: Selection; Indirect criteria; Residual feed intake; Clone; Rainbow trout.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4777.pdf
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Reduced lipid intake leads to changes in digestive enzymes in the intestine but has minor effect on key enzymes of hepatic intermediary metabolism in rainbow trout (Oncorhynchus mykiss) ArchiMer
Ducasse Cabanot, S; Zambonino, Jose-luis; Richard, N; Medale, Francoise; Corraze, Genevieve; Mambrini, M; Robin, Jean; Cahu, Chantal; Kaushik, Sadasivam; Panserat, S.
For sustainable aquaculture, the removal of marine resource ingredients in fish diets is an important objective. While most studies focus on the replacement of fish oil by vegetable oil, little is known on the nutritional effects of presence (which corresponds to the control diet) or absence of dietary fish oil. We studied fatty acid composition of brush-border membranes and digestive enzyme activities of the intestine and measured the expression and activities of several enzymes involved in the hepatic intermediary metabolism of rainbow trout (Oncorhynchus mykiss) fed for 7 weeks with or without fish oil. The diets were pair-fed to ensure that fish fed either diet had comparable carbohydrate and protein intakes. Absence of fish oil significantly reduced...
Tipo: Text Palavras-chave: Rainbow trout; Metabolism; Fish oil; Digestion; Aquaculture.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3506.pdf
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