Researches Regarding the Combined Fodder Additives (Bio- Mos+Nupro+Selplex) Effects on the Productive Performances and Health of Rainbow Trout (Oncorhynchus Mykiss W.)

The trial had been carried out during 5 May–30 September 2009, (23 weeks) at the trout farm ICAS Gilau, ClujCounty. Two groups were implied: a Control group and one experimental group (Bio-Mos0.2%+SelPlex0.03%+NuPro2%) each consisting of 250 rainbow trout juveniles. The experimental groupreceived 0.2 % Bio-Mos+0.03% SelPlex+2%NuPro. At the end fish reached an average weight of 253.20 g/specimenfor experimental group and 241.10 g/specimen for the Control group. The growth rate incresed by 5.23 % at theexperimental group comparative with the Control group. The highest value of specific growth rate was recorded atgroup E, 1.51 g/day, with 5.59 % higher than the specific growth rate of the Controls. The addition of combinedfodder additives in group E feed led to an abatement of the feed conversion rate (1.39:1) by 2.12 % smallercomparative with the Control group (1.42:1). The analysis of indices regarding the fish health and survival rate,showed the positive effects of the combined additives. At intestinal level it was noticed an increasement of villilenght at group E with 10.72 % higher comparative with the Control group. A significant improvement of seleniumcontent of rainbow trout meat was also noticed