胆汁末を添加した大豆油粕主体の無魚粉飼料を給与したニジマスの肝臓および直腸の組織学的検討

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タイトル別名
  • Histological Observation of Liver and Distal Intestine of Fingerling Rainbow Trout, Oncorhynchus mykiss, Fed Defatted Soybean Meal Based Non-Fish Meal Diet Supplemented with Gall Powder
  • タンジュウマツ オ テンカシタ ダイズ アブラカス シュタイ ノ ムギョフン シリョウ オ キュウヨシタ ニジマス ノ カンゾウ オヨビ チョクチョウ ノ ソシキガクテキ ケントウ

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Three diets, defatted soybean meal based non-fish meal diet (SBM), soybean meal based non-fish meal diet containing 1.5% bovine gall powder (SBM+B) and control fish meal-based diet (FM), were fed to rainbow trout, Oncorhynchus mykiss, to examine effects of bile salts in gall powder on the histology of liver as well as distal intestine. Hepatocytes and epithelial cells in hepatic ducts of the fish fed SBM diet were considered to be atrophied. Lacking of microvilli and pinocytotic vacuoles, fatty degeneration of intestinal epithelial cells and proliferation of connective tissue in lamina propria were shown in distal intestine of fish fed the SBM diet. However hepatic and intestinal histological features in fish fed SBM+B diet are similar to those in FM control diets. These results suggest a possibility that supplementation of bovine gall powder to the SBM improves digestion and absorption of lipid in distal intestine probably due to increasing secretion of bile salts from liver into intestine.

収録刊行物

  • 水産増殖

    水産増殖 55 (2), 225-230, 2007

    日本水産増殖学会

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