ブリ当歳魚の水温下降期におけるエクストルーダー飼料の適正給餌法

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  • Feeding Regimes for Young Yellowtail on Extruded Diets during the Declining Period of Water Temperature
  • ブリ トウサイギョ ノ スイオン カコウキ ニ オケル エクストルーダー シリョウ ノ テキセイキュウジホウ

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Three feeding experiments were conducted to establish the optimum feeding regimes of extruded pellet (EP) for young yellowtail, Seriola quinqueradiata during the declining period of water temperature. Fish were fed at frequencies of six or two times per week or every other day during September to December or January. Growth performance and feed utilization in fish under the feeding regimes of six times per week and every other day were similar and better than those two times per week. Therefore, it was assumed that the optimum feeding frequency for EP during this season was once in every two days. The relations between daily growth rate (DGR, %/day) and daily digestible energy intake (DDE, kcal/kg⋅BW/day) in the experiments are indicated by a curved line of DGR=0.721 {1-e-0.137 (DDE-42.848) } (γ2=0.913) . From a point of contact with the tangent to the curved line, the optimum energy requirement for the most efficient growth and feed efficiency of fish fed EP during this season is 58.9 kcal/kg⋅ BW/day.

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  • 水産増殖

    水産増殖 51 (4), 435-441, 2003

    日本水産増殖学会

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