飼料リン制限がニジマスとフナのフィレ脂質および肝臓の脂質代謝に与える影響

DOI 日本農学文献記事索引 Web Site 被引用文献1件 参考文献46件
  • Sugiura Shozo
    Department of Bioresources Management, School of Environmental Sciences, University of Shiga Prefecture
  • Higashitani Akihiro
    Department of Bioresources Management, School of Environmental Sciences, University of Shiga Prefecture
  • Sasaki Toshihiro
    Department of Bioresources Management, School of Environmental Sciences, University of Shiga Prefecture

書誌事項

タイトル別名
  • Effects of Dietary Phosphorus Restriction on Fillet Fat Deposition and Hepatic Lipid Metabolism in Rainbow Trout (<I>Oncorhynchus mykiss</I>) and Crucian Carp (<I>Carassius auratus grandoculis</I>)
  • Effects of dietary phosphorus restriction on fillet fat deposition and hepatic lipid metabolism in rainbow trout Oncorhynchus mykiss and crucian carp Carassius auratus grandoculis

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抄録

Rainbow trout (mean body weight 21.1 g) and crucian carp (mean body weight 3.92 g) were fed test diets for 114 and 61 days, respectively. In trout, the fillet fat, 20:5n-3, and 22:6n-3 contents were, respectively, 1.5, 1.7, and 1.4 times higher (P<0.05) in fish fed a low-phosphorus diet (LP, 0.23% P) than those fed a high-phosphorus diet (HP, 1.06% P). In carp, the fillet fat, 20:5n-3, and 22:6n-3 contents were, respectively, 1.7, 1.6, and 1.3 times higher (P<0.05) in fish fed the LP diet than those fed the HP diet. However, when fish oil in the LP diet was replaced with lard, the fillet fat content did not increase. To investigate the molecular mechanism of body fat accumulation under dietary P restriction, the expression of 13 genes in the trout liver was determined by RT-QPCR. The mRNA expression of CPT1 (carnitine palmitoyltransferase-I), a rate-limiting enzyme in lipolysis, tended to be lower in the LP than HP groups. The expression of ACC1 (acetyl-CoA carboxylase), a rate-limiting enzyme in lipogenesis, tended to be higher in the LP than HP groups. The altered metabolism by chronic P restriction appears to be lipogenic, ketogenic, and possibly thermogenic.

収録刊行物

  • 水産増殖

    水産増殖 59 (1), 109-122, 2011

    日本水産増殖学会

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