The present study was carried out to evaluate dietary effects of galactooligosaccharide (GOS) (0, 1, 2 and 3 %) on innate immune response, stress resistance, digestive enzyme activity as well as growth performance of Narrow clawed crayfish (Astacus leptodactylus). The crayfish with mean weight of 27.88±0.27 and density of 8 number stocked to each 110 liter tanks and fed with 1.5 percent of body weight experimental diets at 10 am and 4 pm in 97 days. At the end of feeding trial, treatments fed with 2% GOS supplemented diets had significantly highest total haemocyte count (THC), semi granular cells (SGC) and hyalin cells (HC) count compared to other groups (P < 0.05). Furthermore the highest digestive enzyme activity (amylase and lipase) was observed in the groups fed with the 2 and 3% GOS (P < 0.05). Moreover, dietary GOS elevated stress resistance due to enhance the mean THC, SGC and HC counts at crayfish fed with the 1 and 2 % GOS supplemented group (P < 0.05). hese results confirm advantageous effects of dietary GOS on innate immunity, stress resistance, intestinal microbiota and digestive enzyme activity of A. leptodactylus, albeit this dietary supplementation had no significant improvement on growth performance, feed utilization and survival rate (P > 0.05).

گالاكتواليگوساكاريد , شاه ميگو , ايمني , مقاومت , استرس , رشد , زندهماني

تهران ﻣﻮﺳﺴﻪ ﺗﺤﻘﯿﻘﺎت ﻋﻠﻮم ﺷﯿﻼﺗﯽ ﮐﺸﻮر

مصور( رنگي)، نمودار، جداول

سازمان تحقيقات، آموزش و ترويج كشاورزي - موسسه تحقيقات علوم شيلاتي كشور – پژوهشكده آبزي پروري آبهاي داخلي 56818