Acorn meal as a nutrient in rainbow trout (Oncorhynchus mykiss) diet

A complete random design involving four diets was conducted to determine the effects of different levels of dietary acorn meal on final weigh, food consumption and food conversion ratio of rainbow trout. Juvenile Rainbow Trouts with an average weight of 74 grams were reared after antiseptic processes in Boldaji station of Chaharmahal and Bakhtiari province for 135 days. We formulated diet treatments 1 - 4 containing 0, 2, 4 and 6 percent of acorn meal respectively. In doing so, we considered nutritive requirements of rainbow trout based on NRC using UFFDA dietary software. We also used local material in providing the diet. The food was given three times a day the amount of which was based on fish biomass in each pound. Once every two weeks, after anaesthetizing 50 percent of fishes in each pound, we measured fish weight and length. The results showed that treatment 4 containing 6% of acorn led to the highest fish weight increase while being significantly different with other treatments. In terms of fish length, the longest length was observed in treatment 4, which had significant difference with treatment I . Food consumption differences was not significant between treatments, but was higher in treatment 4. However, food conversion ratio was significantly affected by treatments, the highest of which was in treatment 4 significantly different with that of treatment I. The results showed that acorn meal can be used as a nutrient in rainbow trout diet, improving fish weight and length gain while having no physiological effects on the fish

Feed quality control of aquatic in Chaharmahal and Bakhtiari Province

Nutrient and chemical composition, TVN, bacteria, yeast, mold and carcass performance, of aquatic feeds which make in this province were determined. In order to above investigation three commercial aquatic steam pelleted feeds samples for stage of growth and fattening were taken randomly from farm and aquatic factory product. In first trail feed sampled were analyzed for dry matter, crud protein, ether extract, ash, phosphorous, TVN, bacteria, yeast and mold computation. In second trial the experiment was carried out in complete random in design with four treatments and three replicate in each for effect of samples diets on feed consumption (FC), average daily gain (ADG) and feed conversion ratio (FCR), which were examined in Juveniles rainbow trout. This experiment were conducted on 3600 Juveniles rainbow trout with initial average weight of 80 gr, for 130 days after antiseptic processes in a pool of one fish producer in Chaharmahal and Bakhtiari province. The feed were given 3 times a day on biomass basis of pounds. During the experiment, once every two weeks, after anaesthetize, weights of 30 fishes in each pound were measuring. The results showed, diet crud protein were significantly differ (P<0.05) between many of feeds. In addition nutrient of diets were differ a little when compare with rainbow trout requirement. Crud protein, phosphorous and EE in starter, grower and finisher of diets were lower than rainbow trout requirement and differ was significant (P<0.05). The index of TVN that shows free nitrogen, were higher than standard in all samples. Bacteria, yeast and mold computation in different of feeds showed that main of total count, yeast and mold in diets of various stage for growth of rainbow trout were different with standards and the differ were higher significantly (P<0.05). The number of coliforms of diets was lower than that suggestion for rainbow trout diets