Effect of dietary taurine and lipid contents on conjugated bile acid composition and growth performance of juvenile Japanese flounder Paralichthys olivaceus
Version of Record online: 3 AUG 2008
© 2008 Japanese Society of Fisheries Science
Volume 74, Issue 4, pages 875–881, August 2008
How to Cite
KIM, S.-K., MATSUNARI, H., NOMURA, K., TANAKA, H., YOKOYAMA, M., MURATA, Y., ISHIHARA, K. and TAKEUCHI, T. (2008), Effect of dietary taurine and lipid contents on conjugated bile acid composition and growth performance of juvenile Japanese flounder Paralichthys olivaceus. Fisheries Science, 74: 875–881. doi: 10.1111/j.1444-2906.2008.01602.x
- Issue online: 3 AUG 2008
- Version of Record online: 3 AUG 2008
- Received 19 September 2007. Accepted 7 February 2008.
- bile acid;
- Japanese flounder;
ABSTRACT: The effects of dietary taurine levels and lipid contents on the conjugated bile acid composition and growth performance of juvenile Japanese flounder Paralichthys olivaceus were investigated. Six types of diet (three different levels of taurine at two different levels of lipid) were fed to juveniles (average body weight, 0.04 g). Fishmeal that was washed with 70% ethanol to remove taurine was used as the sole protein source. Feeding experiments were carried out at 20°C for 6 weeks. At the end of the experiments, fish were weighed and analyzed for free amino acids in the body and the composition of the conjugated bile acids. The body weight and percent weight gain of the juveniles were improved by the dietary taurine supplementation. The taurine contents of the whole body and tissues increased with the increase of the dietary taurine contents. The conjugated bile acids in the gall bladder consisted of taurocholic acid and taurochenodeoxycholic acid, which increased with the increase of the dietary taurine level. Taurocholic acid accounted for more than 95% of the total conjugated bile acids. This indicates that taurine is the sole amino acid to conjugate bile acid in Japanese flounder.