アユの消化管性状と消化システムに及ぼす飼料物性の影響

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タイトル別名
  • Effect of Dietary Types on Characteristics of Gut and Digestion system in Ayu.
  • アユ ノ ショウカカン セイジョウ ト ショウカ システム ニ オヨボス シリョウ ブッセイ ノ エイキョウ

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Ayu Plecoglossus altivelis with 11g initial body weights were reared on two different diets. Growth, feed utilization, characteristics of gut, and the ingestion of nutrients were investigated.<BR>Two experimental diets were prepared, crumbling the extruded pellet produced Diet 1, and Diet 2 was prepared by cutting extruded ingredients into a disk shape. Diet 2 maintained its shape in water and in the fish gut for a long time and gave better results in terms of growth than Diet 1 and there were significant differences in feed efficiency and protein efficiency ratio. The characteristics of gut, such as intestine size, and height of tunica mucosa, and height/intestine diameter ratio were variable in response to dietary types. Fish fed Diet 2 had more muscle protein and but less lipid than fish fed Diet 1.<BR>These findings demonstrate that dietary types affected the characteristics of gut and digestion system in ayu.

収録刊行物

  • 水産増殖

    水産増殖 49 (1), 61-66, 2001

    日本水産増殖学会

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