The present study was conducted to evaluate the efficacy of the dietary inclusion of commercial hydrolysable tannins (HT) on the growth performance and haemato-immunological parameters of Pacific white shrimp (Litopenaeus vannamei). Four isonitrogenous and isolipidic practical diets were formulated to contain 0; 0,1; 0,2 and 0,3% of HT obtained from the sweet chestnut (Castanea sativa). The 0,3% HT was designed to be included in a diet with a low level of fish meal (FM) (7,5%), while others included 10% FM. A total of 240 post larvae shrimp with an average initial body weight of 4.24 ± 0,03 g were randomly stocked in four groups, with four replicates per treatment and 15 shrimp per aquaria tank. Results showed that there were no significant differences in terms of final biomass, final mean weight, survival, weight gain (WG), feed conversion ratio (FCR) and thermal growth coefficient (TGC). However, biologically, a better performance was observed when the diets had higher inclusion levels of HT. Shrimp fed diets with 0,2 and 0,3% HT had a significantly higher total haemocytes count, and those fed the diet with 0,2% HT also had a significantly higher lysozyme activity, compared to shrimp from the control group. These results indicated that 0,2 and 0,3% HT could remarkably improve the growth performance and the haemato-immunological parameters of Pacific white shrimp, and have potential functional properties when included in commercial diets for shrimp.

本研究旨在评估日粮中商业可水解单宁 (HT) 对太平洋白虾 ( Litopenaeus vannamei )生长性能和血液免疫参数的影响。四种异氮和异脂实用日粮被配制为含有 0；0,1; 0,2 和 0,3% 的 HT 来自甜栗子 ( Castanea sativa）。0.3% HT 被设计用于包含低水平鱼粉 (FM) (7.5%) 的饮食，而其他包括 10% FM。总共 240 只平均初始体重为 4.24 ± 0.03 g 的后期幼体虾被随机分为四组，每个处理 4 个重复，每个水族箱 15 只虾。结果表明，在最终生物量、最终平均体重、成活率、增重（WG）、饲料转化率（FCR）和热生长系数（TGC）方面没有显着差异。然而，在生物学上，当日粮的 HT 含量较高时，观察到更好的表现。与对照组的虾相比，饲喂 0.2% 和 0.3% HT 日粮的虾具有显着更高的总血细胞计数，饲喂 0.2% HT 日粮的虾也具有显着更高的溶菌酶活性。