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Showing 2 results for Jalali
Sima Eskandari, Dr. Sayed Mohammad Ali Jalali, Dr. Azar Hematzadeh,
Volume 6, Issue 1 (10-2018)
Abstract
This experiment was conducted to study the effects of two types of prebiotics A, contain 16% beta-glucans and 80% mannan-oligosaccharides, and B contain 30% beta-glucans and 18% mannan-oligosaccharides on weight gain, feed conversion ratio, survival rate, carcass percentage, blood parameters, gene expression of transforming growth factor beta1 (TGF-ß1) at head kidney and intestinal morphology of rainbow trout. One thousand eight hundred of fry rainbow trout (mean initial body weight 6 g) were randomly assigned to nine polyethylene tank (300 lit) which contained 200 fish per each tank. Fish fed daily at 3.5% of mass body weight by one of three dietary treatments containing control (without prebiotic), and experimental diets A and B for 8 weeks. The amount of probiotic in both experimental diets was 0.96 g.kg-1 which get by addition of 1 and 2 g.kg-1probiotic A and B, respectively. At the end of experiment, results showed that growth performance of fish was not affected by prebiotics supplement but carcass percent and survival rate of fish significantly increased by feeding prebiotics (p<0.05). The albumin, total protein and globulin of fish serum were significantly increased by prebiotics supplement (p<0.05) and supplementation of prebiotic B showed higher effects. The prebiotics supplement significantly increased blood lymphocyte and the ratio of length to high of intestinal villus of fish (p<0.05). The gene expression of TGF ß of head kidney was significantly increased by dietary prebiotics supplement (p<0.05) and prebiotic A increased the rate of this gene expression. In conclusion, the results of this experiment showed that using of dietary prebiotics A improved immunity and carcass efficiency of rainbow trout and physiological response of fish are related to probiotic composition.
Dr Preeta Kochanian, Dr Azar Hematzadeh, Dr Saeed Keyvanshokooh, Dr Seyed Amir Hossein Jalali,
Volume 7, Issue 2 (7-2019)
Abstract
This study investigated the effects of replacement of fish oil with dietary sesame oil (SO) on growth performance and fillet composition of rainbow trout ( Oncorhynchus mykiss) juvenile with initial mean body weight 52.54 ± 2.03 . Triplicate groups of 30 fish each held under identical culture conditions were fed twice daily by iso-nitrogenous, iso-calorific and iso-lipidic diets for 8 weeks. Experimental diets consisted of 36.96% protein and 18.52% lipid from fish oil (T1) 75% fish oil with 25% sesame oil(T2), 50% fish oil with 50% sesame oil (T3), 25% fish oil with 75% sesame oil (T4) ) and sesame oil (T5). Dietary sesame oil had no significant effect on growth rate or feed conversion ratio but the group was fed 100 % sesame oil had lower final body weight compare with others. SGR had been effect by oil source in diet and this index was decreased by increasing of sesame oil in diets. The VSI and HSI were changed by changing of diets and VSI was significantly higher in fish fed sesame oil only. The condition factor of fish reared on T5 was significantly higher than other groups. These treatments were affected on body composition, The carcass lipid content was lower in fish fed sesame oil. In contrast, protein content in carcass was higher in fish fed sesame oil. no significant differences were observed between dietary treatments for ash content in carcass of rainbow trout. The present results indicate that rainbow trout juvenile can be reared on diets in which FO has been replaced with SO, with no significant effects on fish performance.
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