Reduced stress and increased immune responses in Nile tilapia kept under self-feeding conditions.

• ENDO MAKOTO

  Laboratory of Fisheries Sciences, Faculty of Agriculture, Miyazaki University

• KUMAHARA CHIKAKO

  Laboratory of Fisheries Sciences, Faculty of Agriculture, Miyazaki University

• YOSHIDA TERUTOYO

  Laboratory of Fisheries Sciences, Faculty of Agriculture, Miyazaki University

• TABATA MITSUO

  Department of Biosciences, Teikyo University of Science & Technology

抄録

Stress and immune responses were studied in Nile tilapia Oreochromis niloticus under both conditions of self-feeding and scheduled feeding. Self-feeding fish had a significantly lower cortisol level in their blood plasma than that of scheduled feeding fish. Furthermore, skin color was found to be paler in the self-feeding fish compared with that of the scheduled feeding fish. Thus, the self-feeding fish had a less stressful physiological status than the other experimental fish. Immunological analyses revealed that the self-feeding fish significantly exceeded the scheduled feeding fish in the phagocytic activity of their macrophages, antibody production, and the number of blood-circulating lymphocytes. The higher immune responses of self-feeding fish seem to be attained through a less stressful environment. This self-feeding behavior could be exploited to create reduced stress for disease control in fish farming.

収録刊行物

• Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ

  Ｆｉｓｈｅｒｉｅｓ　ｓｃｉｅｎｃｅ 68 (2), 253-257, 2002

  公益社団法人 日本水産学会

キーワード

• antibody production
• cortisol
• immunity
• phagocytosis
• self-feeding
• stress

詳細情報

• CRID: 1390001204428101120
• NII論文ID: 130003742432
• NII論文ID: 10008272864
• NII書誌ID: AA10993718
• DOI: 10.1046/j.1444-2906.2002.00419.x
• ISSN: 14442906
• ISSN: 09199268
• NDL書誌ID: 6151744
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6151744
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可