Dietary Methionine Requirements of Pacific White Shrimp Litopenaeus vannamei, of Three Different Sizes
文献类型: 外文期刊
作者: Lin, Heizhao 1 ; Chen, Yifang 1 ; Niu, Jin 1 ; Zhou, Chuanpeng 1 ; Huang, Zhong 1 ; Du, Qiang 1 ;
作者机构: 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Minist Agr, Key Lab South China Sea Fishery Resources Exploit, Guangzhou 510300, Guangdong, Peoples R China
关键词: Litopenaeus vannamei;methionine requirements;growth performance;body composition
期刊名称:ISRAELI JOURNAL OF AQUACULTURE-BAMIDGEH ( 影响因子:0.287; 五年影响因子:0.593 )
ISSN: 0792-156X
年卷期: 2015 年 67 卷
页码:
收录情况: SCI
摘要: Three feeding trials were conducted to determine the dietary methionine requirements for Litopenaeus vannamei of three different sizes, small (0.55 +/- 0.01g), medium (4.18 +/- 0.05g), and large (9.77 +/- 0.08g). Seven diets were formulated with seven different levels of methionine (0, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, or 0.6%). The greatest weight gain (WG) and specific growth rate (SGR) of small and large shrimp were observed when dietary methionine levels were 0.8%, and 0.71%, respectively (P<0.05). The highest survival rate of small and large shrimp was observed when dietary methionine levels were 0.97%, and 1.07%, respectively (P<0.05). For small and medium shrimp, the optimal dietary methionine level for maximum weight gain estimated by quadratic regression analysis was 0.91% and 0.67% of dry diet, respectively. For large shrimp, the optimal dietary methionine requirement estimated by broken-line model based on weight gain was 0.66% of dry diet.
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