Effect of Dietary Sodium Chloride Levels on Growth and Tolerance to Sea Water of Rainbow Trout.

• Park Gwang-Sic

  Department of Aquatic Biosciences, Tokyo University of Fisheries

• Takeuchi Toshio

  Department of Aquatic Biosciences, Tokyo University of Fisheries

• Yokoyama Masahito

  Devision of Marine Biochemistry, National Research Institute of Fisheries Science

• Satoh Shuichi

  Department of Aquatic Biosciences, Tokyo University of Fisheries

Bibliographic Information

Other Title

• ニジマスの成長および塩分耐性に及ぼす飼料中塩化ナトリウム含量の影響
• ニジマス ノ セイチョウ オヨビ エンブン タイセイ ニ オヨボス シリョウチ

Abstract

Two feeding experiments were conducted to investigate the effect of dietary sodium chloride (NaCl) levels (0, 2.5, 5.0, 7.5, 10.0, 15.0%) on the growth of young and juvenile rainbow treout Oncorhynchus mykiss. After the feeding experiment, fish were acclimated to sea water (33‰) to check the sea water tolerance.<br>Young rainbow trout (BW, 59g) fed diets containing 10 and 15% NaC1 for 4 weeks showed lower weight gain than the trout fed diets containing less than 5% NaCl. However, no mortality was observed in any group of fish after 7 days of sea water acclimation. On the other hand, juvenile trout (BW, 1.7g) fed the 2.5% NaC1 diet showed significantly better (p⟨0.05) weight gain and protein efficiency ratio than those fed the 0, 5.0, 7.5, and 10.0% NaC1 diets during the 7 week feeding trial. Moreover, the mortality of fish fed the 2.5% NaC1 diet during the sea water tolerance test was the lowest. Therefore, the influence of NaCl levels in diet on growth and tolerance to sea water depends on the fish size. It is shown that the excess amount of NaCl level in diet is more than 7.5% (1.4g/kg fish/day) and 11.2% (1.4g/kg fish/day) for juvenile and young rainbow trout, respectively. The excess and minimum amounts of NaCl in diet for juveniles should be considered.

Journal

• NIPPON SUISAN GAKKAISHI

  NIPPON SUISAN GAKKAISHI 64 (3), 469-474, 1998

  The Japanese Society of Fisheries Science

Keywords

• NaCl

Details

• CRID: 1390001206411368064
• NII Article ID: 10004853564
• NII Article ID: 10004984447
• NII Book ID: AN00193422
• DOI: 10.2331/suisan.64.469
• ISSN: 1349998X
• ISSN: 00215392
• NDL BIB ID: 4482243
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010572807
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4482243
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed