In vitro protein digestion, and growth of Atlantic salmon with different trypsin isozymes |
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Authors: | M Bassompierre TH Ostenfeld E McLean K Rungruangsak Torrissen |
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Institution: | (1) FF of Denmark, Havnevagtvej PB, 164, Skagen, Denmark;(2) Biotechnology Laboratory, Aquaculture Division, Sohngaardsholmsvej, Aalborg University, 57 Aalborg, Denmark;(3) Institute of Marine Research, Matre Aquaculture Research Station, Matredal, Norway |
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Abstract: | Growth and in vitro digestion was examined in three iso-trypsin phenotypes (patterns 1, 2 and 2) of Atlantic salmon, Salmo salar. Fish grew equally well during the 128 day experiment irrespective of phenotype. At day 64 and 91, weight-specific growth rate of 2 phenotype animals were significantly lower (p < 0.05). At the end of the experiment, significant differences (p < 0.05) were noted between groups with respect to size. An in vitro method was used to examine protein digestion by the different trypsin phenotypes. Three fish meals (FM I > FM II > FM III) of high, medium and low quality, as defined by chemical analyses, were used. Phenotype 1 was able to differentiate between three fish meals ranking FM I > FM II > FM III. In contrast, phenotypes 2 and 2 were not able to separate between meals. In vitro digestion efficiency was dependent upon the three salmon types, ranking phenotype 2 > 1 = 2. |
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Keywords: | Atlantic salmon (Salmo salar) Digestion Enzymes Growth Morphometrics Protein |
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