Fisheries Science

, Volume 73, Issue 1, pp 123–131

Supplemental effect of bile salts to soybean meal-based diet on growth and feed utilization of rainbow trout Oncorhynchus mykiss

  • Takeshi Yamamoto
  • Nobuhiro Suzuki
  • Hirofumi Furuita
  • Tsuyoshi Sugita
  • Natsumi Tanaka
  • Takanobu Goto
Article

DOI: 10.1111/j.1444-2906.2007.01310.x

Cite this article as:
Yamamoto, T., Suzuki, N., Furuita, H. et al. Fish Sci (2007) 73: 123. doi:10.1111/j.1444-2906.2007.01310.x

Abstract

A feeding experiment was conducted to evaluate the supplemental effect of bile salts to a defatted soybean meal-based non-fish meal diet for rainbow trout Oncorhynchus mykiss. A fish meal-based diet (FM) and two non-fish meal diets with and without bovine bile salts (SC+B and SC, respectively) were fed to fish (13 g initial weight) for 10 weeks. Fish fed diet SC showed inferior growth and feed efficiency, while bile salt supplementation improved the parameters to the same levels as fish fed diet FM. Crude fat and starch digestibility of diet SC-fed fish decreased after the 10-week feeding trial compared to the data obtained with fish that had no experience of the diet. Total biliary bile salt content and intestinal maltase activity of fish fed diet SC were the lowest among treatments, while these parameters were improved by bile salt supplementation. Morphological changes occurred in the distal intestine and liver of the diet SC group, although the histological features of fish fed diet SC+B were similar to those of fish fed diet FM. These results suggest that bile salt supplementation to a soybean meal-based diet improves the nutrient utilization by normalizing digestive processes in rainbow trout.

Key words

bile saltsdietfish mealintestinal morphologyOncorhynchus mykisssoybean meal

Copyright information

© The Japanese Society of Fisheries Science 2007

Authors and Affiliations

  • Takeshi Yamamoto
    • 1
  • Nobuhiro Suzuki
    • 2
  • Hirofumi Furuita
    • 1
  • Tsuyoshi Sugita
    • 1
  • Natsumi Tanaka
    • 3
  • Takanobu Goto
    • 3
  1. 1.Feed Research Group, Inland Station, National Research Institute of AquacultureFisheries Research AgencyTamaki, MieJapan
  2. 2.Department of Fisheries, School of Marine Science and TechnologyTokai UniversityShimizu, ShizuokaJapan
  3. 3.Department of Chemistry and BiochemistryNumazu College of TechnologyNumazu, ShizuokaJapan