Effects of supplementation of crystalline of crystalline or coated methionine on growth performance and feed utilization of the pacific white shrimp, Litopenaeus vannamei
文献类型: 外文期刊
作者: Chi, S. Y. 1 ; Tan, B. P. 1 ; Lin, H. Z. 3 ; Mai, K. S. 2 ; Ai, Q. H. 2 ; Wang, X. J. 2 ; Zhang, W. B. 2 ; Xu, W. 2 ; Liufu, 1 ;
作者机构: 1.Guangdong Ocean Univ, Coll Fisheries, Lab Aquat Econ Anim Nutr & Feed, Zhanjiang 524025, Peoples R China
2.Ocean Univ China, Minist Educ China, Key Lab Mariculture, Qingdao, Peoples R China
3.Chinese Acad Fishery Sci, S China Sea Fisheries Res Inst, Guangzhou, Guangdong, Peoples R China
关键词: coated;feeding and nutrition;growth performance;methionine;Pacific white shrimp (Litopenaeus vannamei)
期刊名称:AQUACULTURE NUTRITION ( 影响因子:3.497; 五年影响因子:3.78 )
ISSN: 1353-5773
年卷期: 2011 年 17 卷 2 期
页码:
收录情况: SCI
摘要: This study was conducted to evaluate the effects of supplementation of crystalline methionine or coated methionine supplemented in diets of Pacific white shrimp (Litopenaeus vannamei) on growth performance and feed utilization. Five iso-nitrogen and iso-caloric diets were prepared in which diets were supplemented with cellulose-acetate-phthalate (CAP), tripalmitin-polyvinyl alcohol (TPA), acrylic resin (RES) coated L-methionine, hydroxyl-methionine calcium (MHA) and crystalline L-methionine diet (MET, control), respectively. After 7 weeks, shrimp (0.81 +/- 0.01 g in initial body weight) weight gain fed with MET and RES diets were significantly higher than that of the others (P < 0.05), while feed conversion ratio of shrimp fed with RES was significantly lower than the others (P < 0.05). Crude protein (as wet weight basis) in whole body of shrimp fed the RES diet was markedly higher than the others (P < 0.05). Methionine contents in muscle of CAP and MHA groups were significantly higher than those of MET group (P < 0.05). Apparently digestibility for essential amino acid of MET group was the highest except methionine. In the present study, RES coating methionine appeared to effectively improve feed protein utilization and enhance growth performance of Pacific white shrimp fed with low fishmeal practical diet.
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