Abstract Effect of dietary substitution of Undaria pinnatifida with onion extract by-product (OEB) on growth, body composition and air exposure stress of juvenile abalone was determined. One thousand and eighty juvenile abalone were randomly distributed into 18,100 L net cages (sixty per cage). Five formulated diets were prepared. Twenty percent U. pinnatifida was included into the control (Con) diet. Twenty five, 50, 75 and 100% U. pinnatifida were substituted with an equal amount of OEB, referred to as the OEB25, OEB50, OEB75 and OEB100 diets, respectively. Finally, dry U. pinnatifida was prepared to compare formulated diets on growth performance of abalone, referred to as the Undaria. Each diet were randomly assigned to triplicate groups of abalone and fed to abalone once a day to satiety with little leftover for 16 weeks. After the 16-week feeding trial, abalone were subjected to air exposure for 24 h and survival was monitored for the next 4 days. Weight gain and specific growth rate (SGR) of abalone fed all formulated diets were greater than those of abalone fed the Undaria. The greatest weight gain and SGR were obtained in abalone fed the OEB50 diet, followed by the OEB75, OEB25, Con and OEB100 diets, in that order. Weight gain and SGR of abalone fed the OEB100 diet were lower than those of abalone fed the Con diet. Shell length, width and height and soft body weight of abalone tended to agree with growth rate of abalone. No difference in the chemical composition of the soft body of abalone was observed. The survival of abalone fed the OEB25, OEB50, OEB75 and OEB100 diets was higher than that of abalone fed the Undaria and Con diet at the end of 4-day post observation after 24-h air exposure. In conclusion, U. pinnatifida up to 75% could be replaced with OEB in abalone feed when 20% U. pinnatifida was included. The greatest growth performance was obtained in abalone fed the OEB50 diet.

中文翻译：

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带洋葱提取物副产品的裙带菜的膳食替代对幼鲍的生长、化学成分和空气暴露压力的影响（Haliotis discus，Reeve 1846）

摘要 确定了用洋葱提取物副产品 (OEB) 代替裙带菜对幼鲍生长、身体成分和空气暴露应激的影响。180 只鲍鱼幼鱼被随机分配到 18,100 L 网箱中（每笼 60 只）。制备了五种配方饮食。20% 的羽扇豆被包括在对照 (Con) 饮食中。25%、50%、75% 和 100% 羽扇豆被等量的 OEB 替代，分别称为 OEB25、OEB50、OEB75 和 OEB100 饮食。最后，准备干燥 U. pinnatifida 来比较配方饲料对鲍鱼（称为裙带菜）生长性能的影响。每种饮食被随机分配到一式三份的鲍鱼组中，每天喂一次鲍鱼以达到饱腹感，几乎没有剩菜，持续 16 周。在 16 周的饲养试验后，鲍鱼暴露在空气中 24 小时，并在接下来的 4 天内监测存活情况。饲喂所有配方饲料的鲍鱼的增重和特定生长率 (SGR) 均高于饲喂裙带菜的鲍鱼。喂食 OEB50 日粮的鲍鱼的增重和 SGR 最大，依次是 OEB75、OEB25、Con 和 OEB100 日粮。饲喂 OEB100 饮食的鲍鱼的增重和 SGR 低于饲喂 Con 饮食的鲍鱼。鲍鱼壳长、宽、高和软体重量与鲍鱼的生长速度趋于一致。观察到鲍鱼软体的化学成分没有差异。鲍鱼的存活喂养了OEB25、OEB50、在暴露于空气 24 小时后的 4 天观察结束时，OEB75 和 OEB100 饮食高于用裙带菜和 Con 饮食喂养的鲍鱼。总之，当包含 20% 的羽扇豆时，鲍鱼饲料中高达 75% 的羽扇豆可以被 OEB 替代。在饲喂 OEB50 日粮的鲍鱼中获得了最大的生长性能。