Abstract In an eight-week feeding trial, encapsulated sodium butyrate (ESB), gamma-aminobutyric acid (GAB), selenium-yeast (SeY), yeast extract nucleotides (YEN), yucca meal (YUM), song-gang stone (SGS) and protease (PRT) were evaluated as functional feed additives in a low fishmeal (FM) diet for olive flounder Paralichthys olivaceus. Eight experimental diets were fed to 5.26 ± 0.17 g (mean ± SD) juvenile olive flounder in triplicates. A low-FM basal diet without feed additive was considered as control (CON); seven other diets were prepared by adding 4 g ESB, 158 mg GAB, 2 g SeY, 4 g YEN, 1.5 g YUM, 4 g SGS, and 175 mg PRT per kg of basal diet. Weight gain, specific growth rate, feed efficiency, and protein efficiency ratio of fish fed diets YEN, GAB, and SGS were significantly higher than those of fish fed CON diet (P .05). Heat shock protein 70 gene expression of fish fed YEN and SeY was significantly higher than those of fish fed the CON diet. Intestinal villi length of fish fed YEN, GAB, SGS, and ESB was significantly higher than those of fish fed CON. Also, intestinal trypsin activity of fish fed YEN, GAB, SGS, ESB, and PRT was significantly higher than those of fish fed CON diet (P

中文翻译：

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橄榄比目鱼、Paralichthys olivaceus 低鱼粉日粮中七种不同功能性饲料添加剂的评价

摘要 在为期八周的喂养试验中，包封丁酸钠 (ESB)、γ-氨基丁酸 (GAB)、硒酵母 (SeY)、酵母提取物核苷酸 (YEN)、丝兰粉 (YUM)、松岗石 (SGS) ) 和蛋白酶 (PRT) 被评估为低鱼粉 (FM) 日粮中橄榄比目鱼 Paralichthys olivaceus 的功能性饲料添加剂。将八种实验日粮一式三份喂给 5.26 ± 0.17 g（平均值 ± SD）的幼年橄榄比目鱼。不含饲料添加剂的低 FM 基础日粮被视为对照 (CON)；通过在每公斤基础日粮中添加 4 克 ESB、158 毫克 GAB、2 克 SeY、4 克 YEN、1.5 克 YUM、4 克 SGS 和 175 毫克 PRT 来制备其他七种日粮。饲喂 YEN、GAB 和 SGS 日粮的鱼的增重、比生长率、饲料效率和蛋白质效率比显着高于饲喂 CON 日粮的鱼（P < .05）。喂食 YEN 和 SeY 的鱼的热休克蛋白 70 基因表达显着高于喂食 CON 饮食的鱼。喂食 YEN、GAB、SGS 和 ESB 的鱼的肠绒毛长度显着高于喂食 CON 的鱼。此外，饲喂 YEN、GAB、SGS、ESB 和 PRT 的鱼的肠胰蛋白酶活性显着高于饲喂 CON 饲料的鱼（P