Dietary Methionine Requirements of Pacific White Shrimp Litopenaeus vannamei, of Three Different Sizes

作者：Lin, Heizhao^*; Chen, Yifang; Niu, Jin; Zhou, Chuanpeng; Huang, Zhong; Du, Qiang

来源：Israeli Journal of Aquaculture – Bamidgeh, 2015, 67: 1163.

• Litopenaeus vannamei
• methionine requirements
• growth performance
• body composition

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.

• 出版日期2015
• 单位中国水产科学研究院