Effects of Alcohol Extract from Soybean Meal on Pancreatic Digestive Enzyme and Bile Acid Secretion in Yellowtail <I>Seriola quinqueradiata</I>

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  • Hung Phuc Nguyen
    Laboratory of Fish Nutrition, Faculty of Agriculture, Kochi University
  • Peerapon Khaoian
    Laboratory of Fish Nutrition, Faculty of Agriculture, Kochi University
  • Furutani Takahiro
    Laboratory of Fish Nutrition, Faculty of Agriculture, Kochi University
  • Nagano Junya
    Laboratory of Fish Nutrition, Faculty of Agriculture, Kochi University
  • Fukada Haruhisa
    Laboratory of Fish Nutrition, Faculty of Agriculture, Kochi University
  • Masumoto Toshiro
    Laboratory of Fish Nutrition, Faculty of Agriculture, Kochi University

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Other Title
  • 大豆のアルコール抽出物がブリの膵臓消化酵素と胆汁酸分泌に及ぼす影響
  • Effects of alcohol extract from soybean meal on pancreatic digestive enzyme and bile acid secretion in yellowtail Seriola quinqueradiata

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Abstract

A feeding experiment was conducted to investigate effects of alcohol extract from defatted soybean meal (SBM) on secretion of pancreatic digestive enzymes and bile acids in yellowtail. Four diets which were designated as SBM, ExSBM (alcohol extracted SBM) and ExSBM+Ext (ExSBM supplemented with alcohol extract) and FM (fish meal) were fed to yellowtail for 3 weeks. Total bile acid level in anterior intestinal digesta was significantly lower in fish fed ExSBM+Ext and SBM than in fish fed ExSBM and FM, despite similar levels in gallbladder among the treatments. Fish fed ExSBM+Ext and SBM showed lower lipase and trypsin activities in anterior intestinal digesta than fish fed ExSBM which presented comparable values to those fed FM. The activities of these enzymes in pyloric caeca of the former fish were slightly higher than those in the later fish. Growth performance tended to be higher in fish fed ExSBM and FM compared to those fed ExSBM+Ext and SBM though no significant differences were observed after 3-week feeding. These findings indicate that alcohol extract from soybean meal inhibits the secretion of bile acids and pancreatic enzymes in yellowtail. This negative effect on digestive physiology might impair growth in a long-term feeding period.

Journal

  • Aquaculture Science

    Aquaculture Science 59 (3), 465-472, 2011

    Japanese Society for Aquaculture Science

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