An 8-week feeding trial was conducted to evaluate effects of dietary organic zinc (zinc amino acid chelate) on growth performance, mineral bioaccumulation in whole body, hepatopancreas and carapace, innate immune response and antioxidant capacity of juvenile Pacific white shrimp Litopenaeus vannamei. Five isonitrogenous and isolipidic diets were formulated to contain different zinc levels of 46.4 (basal diet), 65.5, 85.9, 108.4 and 130.6 mg kg⁻¹. Dietary zinc level significantly influenced growth and feed utilization, with the lowest weight gain and highest feed conversion ratio observed in shrimp fed the basal diet. The optimal dietary zinc requirement was estimated to be 104.8 mg kg^-1 for juvenile Pacific white shrimp. Shrimp fed the diet containing 130.6 mg kg⁻¹ Zn had the highest zinc concentration in hepatopancreas and carapace, but there were no significant differences in calcium or phosphorus concentration in tissues. Dietary Zn increased the activities of lysozyme, alkaline phosphatase and polyphenol oxidase in hepatopancreas. Shrimp fed the diets supplemented with zinc had significantly higher activity of Cu/Zn SOD and lower content of malondialdehyde in hepatopancreas. The expression levels of toll, imd, lzm, proPO and alp involved in immunity and Cu/Zn sod related to oxidation resistance were up-regulated. Zinc also promoted the expression levels of mt and mtf-1, and up-regulated the expression of SLC39 family genes (zip3, zip9, zip11, zip14) in hepatopancreas. These data provided novel insights in the potential mechanism of organic zinc-induced enhancement of immunity and antioxidant capacity in Pacific white shrimp.

进行了为期8周的饲养试验，以评估日粮有机锌（锌氨基酸螯合剂）对少年太平洋白对虾凡纳滨对虾的生长性能，全身矿物质生物积累，肝胰腺和甲壳，先天免疫应答和抗氧化能力的影响。配制了五种等氮和等脂饮食，以分别含有46.4（基础饮食），65.5、85.9、108.4和130.6 mg kg ^-1的锌含量。日粮锌水平显着影响生长和饲料利用率，在饲喂基础日粮的虾中增重最低，饲料转化率最高。最佳的膳食锌需求量估计为104.8 mg kg ^-1少年太平洋白虾。虾饲料中含130.6 mg kg ^-1的锌在肝胰脏和甲壳中的锌含量最高，但是组织中钙或磷的含量没有显着差异。日粮锌增加了肝胰腺中溶菌酶，碱性磷酸酶和多酚氧化酶的活性。虾补充锌饮食具有明显较高的铜/锌超氧化物歧化酶活性和肝胰腺中丙二醛含量较低。上调与免疫力相关的toll，imd，lzm，proPO和alp的表达水平以及与抗氧化性有关的Cu / Zn sod的表达水平。锌还促进了mt的表达水平和mtf-1，并上调肝胰腺中SLC39家族基因（zip3，zip9，zip11，zip14）的表达。这些数据为太平洋白虾中有机锌诱导的增强免疫力和抗氧化能力的潜在机制提供了新颖的见解。