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    Effects of dietary carbohydrate, lipid and energy on the growth, feed efficiency, and tissue composition of bighead carp (Aristichthys nobilis) fry

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    ffssa_p111.pdf (459.4Kb) Open Access
    Downloads: 1,506
    Date
    1996
    Author
    Trono-Legiralde, Maria Theresa
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    Abstract
    The utilization of dietary carbohydrate and lipid as energy sources for bighead carp (Aristichthys nobilis) fry and various protein:energy ratios were investigated in a 2x3x3 factorial feeding experiment. Semi-purified diets containing two protein levels (28.9 and 37%) and three levels of lipid (4.26, 5.93 and 6.95%) and carbohydrate (42,48 and 53%) to give different total energy levels were fed to bighead carp fry (48.5 ± 3.5 mg) for 8 weeks.Growth of fry fed diets with 37% protein was significantly higher (P < 0.01) than that of fry fed diets with 28.9% protein level. An increase in dietary lipid from 4.26 to 6.95% depressed growth (P < 0.05). There were no significant differences in feed conversion efficiency (FCE) at varying levels of protein and lipid, although their increments resulted in a decrease in FCE. Increase in dietary protein significantly decreased (P < 0.01) protein efficiency ratio (PER) while increase in dietary carbohydrate significantly decreased (P < 0.05) FCE and PER. Bighead carp fry fed diets containing 3131 and 3470 kcal metabolizable energy/kg and P:E ratio of 92 and 107 mg protein/kcal had the best overall performance. However, the 37% protein diet with approximately 4470 kcal metabolizable energy produced maximum growth. Growth was better with diets containing dietary lipid level of 4.26% and carbohydrate level of 42%. Tissue lipid increased significantly (P < 0.01) with an increase of dietary lipid and carbohydrate. However, inclusion of the highest level of both components in test diets decreased tissue lipid. Tissue protein was significantly higher (P < 0.01) in fry fed high protein diets and low levels of lipid and carbohydrate. Tissue protein, moisture and ash were inversely related to tissue lipid. Survival (%) increased (P < 0.01) with the increase of dietary protein and carbohydrate. Increase of dietary lipid did not significantly affect survival rates of bighead carp fry.
    Description
    Abstract only
    URI
    http://hdl.handle.net/10862/542
    Type
    Conference paper
    Subject
    Artificial feeding; Carbohydrates; Diets; Feed efficiency; Fish culture; Growth; Lipids; Aristichthys nobilis
    Collections
    • Feeds for Small-scale Aquaculture [22]


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