低水温期のブリの成長，飼料効率およびタンパク質消化率に及ぼす酵素処理した魚粉の飼料効果

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  • Dietary Effects of the Protease Treatments of Fish Meal on the Growth, Feed Efficiency, and Protein Digestibility of Yellowtail During Low Temperature Season.
  • テイスイオンキ ノ ブリ ノ セイチョウ シリョウ コウリツ オヨビ タンパクシツ ショウカリツ ニ オヨボス コウソ ショリ シタ ギョフン ノ シリョウ コウカ

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Eight kinds of experimental meals that contain different revels of hydrolyzed proteins were prepared after several protease treatments of the fish meal (FM), and analyzed their dietary effects on the growth performance and protein digestibility of yellowtail, Seriola quinqueradiata during low temperature season.<BR>The group of meals containing 25-34% of TCA soluble nitrogen (N) obtained after the middle treatments of proteases showed higher effects on the daily growth rate (DGR; 1.03-1.09 times to the group of the meals without the protease treatments), feed efficiency (FE; 1.04-1.15 times), and apparent protein digestibility (APD; 1.04-1.10 times) of yellowtail than those of FM containing 15-17% of TCA soluble N without the protease treatments. On the other hand, the group of the meals with excessive protease treatments containing 37-40% of TCA soluble N had worse effects on DGR (0.90-1.01 times), FE (0.82-0.95 times), and APD (0.87-0.96 times) comparing with those of FM without the treatments.<BR>These results indicate that, during low temperature season, feeding with the protease treated FM has the beneficial effects on the growth performance and protein digestibility of yellowtail, although the excessive treatments of FM may have the counterproductive effects.

収録刊行物

  • 水産増殖

    水産増殖 50 (2), 219-226, 2002

    日本水産増殖学会

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