This study was aimed at evaluating whether dietary chromium yeast (CrYst) and astaxanthin (ASTA) could enhance the growth performance, anti-oxidative capacity, and resistance to heat stress of abalone Haliotis discus hannai (initial body weight: 1.14±0.10 g; initial shell length: 19.20±0.87 mm) after a 120-day feeding trial. Based on the basal diet, the other three experimental diets were designed with supplementation of 2 mg/kg of CrYst, 80 mg/kg of ASTA, and 2 mg/kg of CrYst + 80 mg/kg of ASTA, respectively. The results showed that supplementation of 2 mg/kg of dietary CrYst significantly increased weight gain rate and the daily increment in shell length of abalone (P < 0.05). However, 80 mg/kg of dietary astaxanthin supplementation had no significant effects on the growth (P > 0.05). Meanwhile, there were no significant differences in feed intake and feed conversion ratio among all the groups (P > 0.05). Meanwhile, adding 2 mg/kg of CrYst and/or 80 mg/kg of ASTA into the diet improved the anti-oxidative capacity in serum and hepatopancreas, increased the gene expression of hsp70 and hsp90 in the hepatopancreas, and reduced the cumulative mortality and falling rate of abalone during the heat stress. In conclusion, dietary supplementation of CrYst and/or ASTA had positive effects on growth and anti-stress of abalone.

这项研究旨在评估日粮铬酵母（CrYst）和虾青素（ASTA）是否可以增强鲍氏鲍鱼（Haiotis discus hannai）的生长性能，抗氧化能力和耐热性（初始体重：1.14±0.10 g；初始壳长：19.20±0.87毫米），经过120天的喂养试验。根据基础饮食，设计了其他三种实验饮食，分别补充了2 mg / kg的CrYst，80 mg / kg的ASTA和2 mg / kg的CrYst + 80 mg / kg的ASTA。结果表明，补充2 mg / kg的膳食CrYst可以显着提高体重增加率和鲍鱼壳长的每日增加量（P <0.05）。但是，补充80 mg / kg的饮食虾青素对生长没有显着影响（P > 0.05）。同时，所有组之间的采食量和饲料转化率没有显着差异（P > 0.05）。同时，在饮食中添加2 mg / kg的CrYst和/或80 mg / kg的ASTA可改善血清和肝胰腺的抗氧化能力，增加肝胰腺中hsp70和hsp90的基因表达，并降低累积死亡率和热应激期间鲍鱼的下降速度。总之，膳食中添加CrYst和/或ASTA对鲍鱼的生长和抗应激具有积极作用。