Effect of feeding rotifers enriched with taurine on the growth and survival of larval amberjack Seriola dumerili
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The effect of feeding rotifers enriched with taurine on the growth performance and survival of larval amberjack Seriola dumerili was investigated. Rotifers were enriched with a commercial taurine supplement at four levels (0, 200, 400, and 800 mg/l). The larvae were fed the enriched rotifers in triplicate from 3 days post-hatch for 7 days under static conditions. The average taurine contents of the rotifers were 1.5, 2.7, 4.2, and 7.2 mg/g dry matter, respectively. The growth of the fish fed rotifers enriched with the taurine supplement at 800 mg/l was significantly (P < 0.05) improved compared with that of the fish fed the rotifers without taurine enrichment. The survival rate improved proportionally up to a taurine supplement level of 400 mg/l, but no significant differences in survival were observed among treatments. The fraction of the larvae with inflated swim bladders did not vary significantly between treatments. Taurine content in the whole fish body increased with the taurine level in the rotifers. These results suggest that taurine enrichment of rotifers is an effective method of enhancing the growth of amberjack larvae.
KeywordsSeriola dumerili Enrichment Rotifer Taurine
We express our sincere gratitude to Mr. H. Ueno, Shibushi Station, National Center for Stock Enhancement, and Messrs K. Tsuruoka, T. Katayama, Y. Hirata, T. Hayashi, A. Imai, and A. Yoshimura, Tokyo University of Marine Science and Technology, for assistance with the feeding experiment. This study was financially supported in part by a Research Project for Utilizing Advanced Technologies in Agriculture, Forestry and Fisheries (grant no. 18003), Ministry of Agriculture, Forestry and Fisheries, Government of Japan.
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