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    Requirement for tryptophan by milkfish (Chanos chanos Forsskal) juveniles

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    Date
    1992
    Author
    Coloso, Relicardo M.
    Tiro, Lillian B.
    Benitez, Lita V.
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    1,204
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    Abstract
    Groups of milkfish juveniles (mean initial weight 7.7 g) were fed semipurified diets containing 0.9, 1.4, 2.1, 3.1, 4.1 and 6.1 g tryptophan/kg dry diet for 12 weeks. The mean crude protein content of the diets (containing white fishmeal, gelatin and free amino acid mixture to simulate the pattern of hydrolysed milkfish protein) was 49%. On the basis of the growth response, the tryptophan requirement of milkfish juveniles was estimated to be 3.1 g/kg diet. Fish fed low levels of tryptophan exhibited low weight gains and poor feed conversion ratios. Survival (92–100%) was consistently high in all treatments. Fish fed diets containing tryptophan levels greater than 3.1 g/kg had slightly lower survival rates. The activity of hepatic tryptophan pyrrolase showed no significant differences with increasing dietary tryptophan levels. No nutritional deficiency signs were observed other than the depression in growth rates in fish given the tryptophan deficient diets.
    URI
    http://hdl.handle.net/10862/1370
    Suggested Citation
    Coloso, R. M., Tiro, L. B., & Benitez, L. V. (1992). Requirement for tryptophan by milkfish (Chanos chanos Forsskal) juveniles. Fish Physiology and Biochemistry, 10(1), 35-41.
    DOI
    10.1007/BF00004652
    Type
    Article
    ISSN
    0920-1742
    Subject
    Amino acids; Diets; Enzymatic activity; Feeding experiments; Fish larvae; Fish physiology; Liver; Nutritional requirements; Protein synthesis; Tryptophan; Milkfish; Chanos chanos
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    • Journal Articles [1100]


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