Isolation of highly
DHA-accumulated Labyrinthulales and their utilization for nutritional
enrichment of rotifers and Artemia
M. Hayashi, R. Matsumoto, T. Yoshimatsu, S. Tanaka,
S. Shimizu-2002
Nippon
Suisan Gakkaishi, 68(5): 674-678 (from
ISI Current Contents)
Abstract:
Twelve strains of highly DHA-accumulated Labyrinthulales were isolated from
coastal sea water in Japan. The lipid contents in the cells and the DHA
contents in the total fatty acids of these isolates were 13.7-23.0%, and
21.5-55.4%, respectively. For the utilization of these isolates as a feed
for nutritional enrichment of rotifers and Artemia, dispersibility of the
cells in the water was evaluated. The cells of several isolates were
agglutinated in sea water or tap water, and caused high mortality of
rotifers and Artemia during their nutritional enrichment. Strain KY-1,
however, showed high DHA content and good dispersibility in the water.
Moreover, the DHA in KY -1 cells was rapidly transferred into rotifer and
Artemia fed on KY-1 cells during their nutritional enrichment. These results
showed that the strain KY-1 would be a novel and profitable feed for
nutritional enrichment of rotifers and Artemia.
(Miyazaki Univ., Fac. Agr., Dept. Biol. Prod. &
Environm. Sci., Miyazaki 8892192, Japan, e-mail: hayash-m@cc.miyazaki-u.ac.jp)