نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار گروه شیلات، دانشگاه گنبد کاووس، گنبد کاووس، ایران.
2 کارشناس ارشد تکثیر و پرورش آبزیان، گروه شیلات، دانشگاه گنبد کاووس، گنبد کاووس، ایران.
3 دانشجوی کارشناسی ارشد تکثیر و پرورش آبزیان، گروه شیلات، دانشگاه گنبد کاووس، گنبد کاووس، ایران
4 کارشناس ارشد بومشناسی آبزیان، گروه شیلات، دانشگاه صنعتی اصفهان، اصفهان، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The aim of present study was to evaluate the effect of different levels of yeast probiotic on growth,
feed utilization and survival of rainbow trout (Oncorhynchus mykiss) alevins. This experiment
conducted in a completely randomized design with four treatments which had triplicates. Four levels
of yeast (0, 3%, 6% and 9% of ration) were added to the basic diet. Fish alevins were fed by
experimental diets 4 times a day at 5 to 6% of body weight for 30 days. Rainbow trout larvae (average
individual weight, 176 mg) were randomly distributed with density of 4 fish/l into twelve 10 liter
fiberglass tanks. The results indicated that the Saccharomyces cerevisiae could not influence growth
and feeding parameters in rainbow trout alevin. The final body weight and specific growth rate (SGR)
in experimental treatments had not significant difference in comparison with control treatment
(P≥0.05). The bakers yeast had not significant positive effects on food conversion efficiency (FCE),
thermal growth coefficient (TGC) and feed conversion ratio (FCR). This study showed that S.
cerevisiae had not high efficiency in feeding parameters and growth performance of rainbow trout
alevin.
کلیدواژهها [English]