Application of
microparticle diets for Japanese flounder Paralichthys olivaceus
larvae
Q. Wang, T. Takeuchi, T. Hirota, S.
Ishida, H. Miyakawa, H. Hayasawa-2004
Fisheries
Science, 70(4):
611-619
Abstract:
A feeding trial was conducted with two
newly developed microparticle diets (MD-Q and MD-V), which differed in the
mixing ratios of two types of casein hydrolysates (C700 and C800) as the
protein source. The ratio of C700 and C800 were adjusted to 7:3 in MD-Q and
6:4 in MD-V, respectively. Japanese flounder larvae were fed from 7 days
after hatching (d.a.h.) to 32 d.a.h. on live food (LF), MD solely, MD + 1/3 LF
(either of the MD and one-third quantity of the live food) and 1/3 LF
(one-third quantity of live food alone), respectively. They were then
switched to Kyowa diet B from 33 d.a.h. until 40 d.a.h. The larvae
fed on MD-Q exclusively had a higher survival rate (36.4%) than those fed on
MD-V (24.2%) by 22 d.a.h. Unfed larvae could survive up to only 12 d.a.h.
Larvae fed on MD-Q + 1/3 LF also had a significantly higher
survival rate (34.2%) than those on MD-V + 1/3 LF (16.3%) and 1/3 LF
solely (15.4%) at 32 d.a.h. These results suggest the potential of MD-Q
as a part replacement for LF from the early developmental stage in the seed
production of Japanese flounder.
(Faculty of Marine Science, Tokyo University of
Marine Science and Technology, Minato, Tokyo 108-8477, Japan, Tel:
81-3-5463-0545. Fax: 81-3-5463-0545, Email of T. Takeuchi: take@s.kaiyodai.ac.jp)