Effects of
protein and lipid sources on the growth and survival of red sea bream Pagrus
major and Japanese flounder Paralichthys olivaceus receiving
micro-bound diets during larval and early juvenile stage
S.-I. Teshima, S. Koshio, M. Ishikawa,
M.S. Alam, L.H.H. Hernandez-2004
Aquaculture
Nutrition, 10(4):
279
Abstract:
The effects of dietary protein and lipid
sources on growth and survival of the red sea bream Pagrus major
(30-days old) and Japanese flounder Paralichthys olivaceus (15-days
old) were examined using four zein-microbound diets (MBD) containing the
following nitrogen and lipid sources: MBD-1, SBP-1000 (soybean peptides with
molecular weights of about 1000) + fish oil calcium soap (FOCS);
MBD-2, SBP-3000 (molecular weights of about 3000) + FOCS; MBD-3,
soybean protein isolate (SPI) + FOCS; MBD-4, SBP-1000 + stearoyl
calcium lactate (SCL). Six groups of the test fish were maintained on the
following diets for 30 days; group 1, live food; group 2, 1/2 live food + 1/2
MBD-1; group 3, MBD-1; group 4, MBD-2; group 5, MBD-3; group 6, MBD-4. In
the red sea bream, high performance in terms of total length (TL) and body
weight gain (BWG) was obtained in groups 1, 2, 3 and 4. However, the fish
receiving MBD-3 (group 5) and MBD-4 (group 6) had shorter TL and lower BWG
than those receiving the other diets. Regarding the Japanese flounder, high
performance in terms of TL, BWG, and survival rate (SR) was obtained in
groups 1 and 2. Group 3 receiving MBD-1 gave the BWG and SR close to those
of group 2 but lower than group 1. In contrast, groups 5 and 6 receiving
MBD-3 or MBD-4 alone had significantly (P < 0.05)
shorter TL and lower BWG than groups 1 and 2. The present study thus
indicated that soybean peptides with molecular weights of 1000-3000 and FOCS
are superior to SPI and SCL as nitrogen and lipid sources of MBD for the red
sea bream and Japanese flounder at larval and early juvenile stage.
(Lab of Aquatic Animal Nutrition, Faculty
of Fisheries, Kagoshima University, 4-50-20 Shimoarata, Kagoshima, 890-0056,
Japan. E-mail: teshima@fish.kagoshima-u.ac.jp)