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I. Giannenas, El. Triantafillou, S. Stavrakakis, M. Margaroni c, S. Mavridis, T. Steiner, E. Karagouni

The manipulation and control of fish health and production by natural substances has been identified as an important area for future developments in aquaculture. A study was conducted to investigate the effect of two phytogenic feed additives, one rich in carvacrol (CARV containing 12 g/kg carvacrol) and the other rich in thymol (THYM containing 6 g/kg thymol) on growth performance, gut microbiota and antioxidant status of rainbow trout (Oncorhynchus mykiss) under commercial farming conditions. Groups of 30 sub-adult trout (113.0 g ± 10.4) were randomly allocated into 3 different treatments with three replicates each. The control group was fed a basal diet, while the other two groups were fed diets supplemented with the two phytogenic diets at the level of 1 g/kg.

Fariborz Taghavi, Mehrdad Nasri Tajan, Abbas Ali Zamini

This study is evaluated the effects of Biomin P.E.P supplement on growth indices, blood and immune factors, and intestine bacterial flora of Bester juvenile fish. The survey is conducted on Bester juvenile sturgeons in fisheries laboratory located in Islamic Azad University Science and Research of Guilan Branch in the fall of 1392. The completely random scheme of the research includes 4 treatments each of which has 3 repetitions. The supplement was added to the basal diet on 4 levels of 0, 1, 1/5, and 2 g / kg.72 of 45-g Bester fish were fed for 60 days based on 5 percent of the body weight in 12 tanks (100-liter) that 6 fish in each tank. At the end of the farming period some of the growth indices, blood and immune factors, and intestine bacterial flora were compared.