Development of less-polluting diets for practical fish culture. I. Development of low protein-high energy diets for practical carp culture with special reference to reduction of total nitrogen excretion.

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Other Title
  • 低タンパク質・高エネルギー飼料によるコイ排泄窒素の軽減
  • 低タンパク質・高エネルギー飼料によるコイ排泄窒素の軽減〔英文〕
  • テイ タンパクシツ コウエネルギー シリョウ ニ ヨル コイ ハイセツ チッソ

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Abstract

Two feeding experiments were conducted for both practical and experimental scales to develop low-protein high-energy diets (less-polluting diets) for practical carp culture in order to reduce the total nitrogen excretion from the fish.<br> Results of both the experiments have demonstrated that diets containing 32-37% crude protein (CP) with digestible energy (DE) above 340kcal/100g diet enriched with carbohydrate or lipid were found to be better than a commercial cazp diet containing CP above 40% in growth and feed efficiency. This fact indicated that CP content in practical carp feeds can be reduced from 40% to around 30% without reduction of growth rate and feed efficiency, if a high quality protein is used as protein source and DE content is increased by carbohydrate or lipid to about 340kcal/100g diet.<br> The total nitrogen excretion from carp was also found to be reduced by 30-48% of the present value by feeding these low protein-high energy diets.

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 53 (8), 1413-1423, 1987

    The Japanese Society of Fisheries Science

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