Research Article: Microalgae feed additives improve growth, immunity, and resistance to Vibrio anguillarum infection in juvenile rainbow trout, Oncorhynchus mykiss
- سال انتشار: 1403
- محل انتشار: مجله علوم شیلات ایران، دوره: 23، شماره: 4
- کد COI اختصاصی: JR_JIFRO-23-4_002
- زبان مقاله: انگلیسی
- تعداد مشاهده: 162
نویسندگان
Major of Aquaculture and Applied Life Sciences, Division of Fisheries Life Sciences, Pukyong National University
Universidad Científica del Sur
CJ Feed & Care
Aquaculture Research Institute, University of Idaho
Aquafeed Research Center, National Institute of Fisheries Science
Major of Aquaculture and Applied Life Sciences, Division of Fisheries Life Sciences, Pukyong National University
East Sea Branch, Korea Fisheries Resources Agency
Major of Aquaculture and Applied Life Sciences, Division of Fisheries Life Sciences, Pukyong National University
Feeds and Foods Nutrition Research Center, Pukyong National University
چکیده
The present study was conducted to evaluate the effects of three different dietary microalgae on growth, intestinal histology, immune biomarkers, and resistance to a bacterial pathogen (Vibrio anguillarum) in juvenile rainbow trout, Oncorhynchus mykiss. Four experimental diets were prepared, including a basal diet (CON) and three diets containing Chlorella sp. (CHL), Haematococcus sp. (HAE), or Schizochytrium sp. (SCH), at ۰.۵% for each microalga which was supplemented in the basal diet. A total of ۱۸۰ juvenile rainbow trout with an initial body weight of ۱۲.۱۶±۰.۰۱ g (mean±SD) were randomly distributed into ۱۲ tanks and reared by the semi-recirculation system. After six weeks of the feeding trial, the weight gain (۹۹.۴%), specific growth rate (۱.۹۲%/day), and myeloperoxidase activity (۵.۰۸), of the fish fed the HAE were significantly higher than those of fish fed the other diets (p< ۰.۰۵). The intestinal villus length of the fish fed the HAE diet (۱.۳۴ µm) was significantly higher than that of those fed the CHL (۱.۱۳ µm) and CON (۱.۱۴ µm) diets. The cumulative survival rates (CSR) were recorded for ۲۷ days after intraperitoneal injection of the bacterial pathogen V. anguillarum. The CSR of the fish fed the HAE diet (۷۵%) was significantly higher than that of those fed the other diets. It is suggested that Haematococcus sp. (۰.۵% inclusion in the diet) may improve weight gain, specific growth rate, intestinal villus length, and myeloperoxidase activity as well as increase the survival rate of juvenile rainbow trout against the V. anguillarum challenge.کلیدواژه ها
Rainbow trout, Microalgae feed additives, Vibrio anguillarum, Immune biomarkersاطلاعات بیشتر در مورد COI
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