Estimating the quantitative essential amino acid requirements of striped bass Morone saxatilis, using fillet A/E ratios
Identifieur interne : 001863 ( Main/Merge ); précédent : 001862; suivant : 001864Estimating the quantitative essential amino acid requirements of striped bass Morone saxatilis, using fillet A/E ratios
Auteurs : M. H. Small [États-Unis] ; M. H. Soares [États-Unis]Source :
- Aquaculture Nutrition [ 1353-5773 ] ; 1998-12.
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Abstract
In order to determine the essential amino acid requirements (EAA) of striped bass Morone saxatilis, fillets were analysed to ascertain the relative amino acid concentrations for determining A/E ratios ((EAA/total EAA) × 1000)). Analysis of the striped bass fillets yielded the following concentrations of essential amino acids (g kg–1) and A/E ratios, respectively: arginine, 12.5, 115; histidine, 5.1, 47; isoleucine, 8.0, 74; leucine, 17.1, 157; lysine, 20.2, 186; methionine + cysteine, 9.2, 85; phenylalanine + tyrosine, 16.0, 147; threonine, 9.8, 90; tryptophan, 1.9, 18; and valine, 9.1, 84. In two experiments, diets with graded levels of EAA were fed to striped bass weighing 111 ± 3 g and 790 ± 122 g per fish, respectively. In both experiments, the dietary A/E ratios were maintained in the same relative concentrations as determined in the striped bass fillets. Statistical analysis of weight gains, feed conversions and nitrogen balance indicated significant differences (P < 0.05) between treatments. Non‐linear regression analysis of the response criteria pooled from both experiments yielded the following estimates of dietary EAA requirements (g kg–1 dry diet) when digestible energy equalled 13.39 MJ kg–1 diet: arginine, 14; histidine, 6; isoleucine, 9; leucine, 19; lysine, 22; methionine + cysteine, 10; phenylalanine + tyrosine, 17; threonine, 11; tryptophan, 3; and valine, 10. The use of fillet A/E ratios allows for the rapid estimation of quantitative EAA requirements and the development of species specific diets for new aquaculture species. The data presented here are the first to simultaneously describe all the dietary EAA requirements for M. saxatilis.
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DOI: 10.1046/j.1365-2095.1998.00075.x
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Analysis of the striped bass fillets yielded the following concentrations of essential amino acids (g kg–1) and A/E ratios, respectively: arginine, 12.5, 115; histidine, 5.1, 47; isoleucine, 8.0, 74; leucine, 17.1, 157; lysine, 20.2, 186; methionine + cysteine, 9.2, 85; phenylalanine + tyrosine, 16.0, 147; threonine, 9.8, 90; tryptophan, 1.9, 18; and valine, 9.1, 84. In two experiments, diets with graded levels of EAA were fed to striped bass weighing 111 ± 3 g and 790 ± 122 g per fish, respectively. In both experiments, the dietary A/E ratios were maintained in the same relative concentrations as determined in the striped bass fillets. Statistical analysis of weight gains, feed conversions and nitrogen balance indicated significant differences (P < 0.05) between treatments. Non‐linear regression analysis of the response criteria pooled from both experiments yielded the following estimates of dietary EAA requirements (g kg–1 dry diet) when digestible energy equalled 13.39 MJ kg–1 diet: arginine, 14; histidine, 6; isoleucine, 9; leucine, 19; lysine, 22; methionine + cysteine, 10; phenylalanine + tyrosine, 17; threonine, 11; tryptophan, 3; and valine, 10. The use of fillet A/E ratios allows for the rapid estimation of quantitative EAA requirements and the development of species specific diets for new aquaculture species. The data presented here are the first to simultaneously describe all the dietary EAA requirements for M. saxatilis.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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