Effects of different levels of dietary mussel phospholipids on the performances of juvenile Kuruma shrimp Marsupenaeus japonicus Bate
2010
Kyaw, K., Kagoshima Univ. (Japan) | Koshino, S. | Ishikawa, M. | Yokoyama, S. | Kikuchi, K. | Laining, A. | Muraoka, Y. | Akimoto, Y.
The present study was undertaken to evaluate the effects of different levels of dietary mussel phospholipid (MPL) on the performances of kuruma shrimp Marsupenaeus japonicus juveniles. A 50-day feeding trial was conducted using six test diets supplementing different MPL levels at 0% (D1), 0.3% (D2), 0.6% (D3), 0.9% (D4), 1.2% (D5) and 1.5% (D6), respectively. Fifteen juveniles (0.32+-0.001g) were randomly stocked into a 45 l rectangular tank and fed the test diet twice a day with 10-12% body weight. Results indicated that the diets with more than 1.9% phospholipid (supplement level is 1.2%) showed significantly higher (p0.05) weight gain, specific growth rate (SGR) and feed efficiency ratio compared with all other diet groups. Based on the broken line analysis of SGR and dietary PL level, the optimal dietary level of phospholipid was 1.88% for juvenile kuruma shrimp when MPL was used. There were no significant differences in survival and chemical compositions of whole shrimp body among all treatments. The present study demonstrated that dietary MPL supplementation is beneficial for growth promotion of juvenile kuruma shrimp and we found that the optimal dietary PL level is 1.9% for juvenile kuruma shrimp when MPL was used as a PL source under the culture conditions applied.
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