Omid Ramzannezhad; Saber Vatandoust; Reza Changizi; Hamed Manouchehri; Reza Safari
Abstract
Influence of Bio Aqua probiotic was evaluated on quality indices of silver carp and some water parameters in pond culture. Fish weighting 1±0.1g were reared in different ponds include 3 doses of Bio Aqua in each one during 4 month. The treatments were Control, (T1:250 g/ha), (T2:350 g/ha) and ...
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Influence of Bio Aqua probiotic was evaluated on quality indices of silver carp and some water parameters in pond culture. Fish weighting 1±0.1g were reared in different ponds include 3 doses of Bio Aqua in each one during 4 month. The treatments were Control, (T1:250 g/ha), (T2:350 g/ha) and (T3:450 g/ha). The obtained results showed that SGR(Specific Growth Rate , DGR( Daily Growth Rate ), WG( Weight Gain ), FCR( Feed Conversion Ratio ) and ( Survival Rate ) were significantly higher in T3 (p>0.05). Also, the result showed best condition of water quality (TTS, BOD, COD). Body composition analysis of fish (Crude protein) and hematological factors in T3 Treatment increased significantly.
Mahmoudreza Ebrahimnezhadarabi; Seyed Mehdi Hosseinifard; Reza Changizi; Saber Vatandoust; Shayan Ghobadi
Abstract
The aim of this study was to investigate the effects of increasing the hydrolyzed protein of canola meal on growth factors, expression of GH, IGF and ghrelin genes and beluga (Huso huso) juvenile body composition. For this purpose, 840 juveniles beluga with an average weight of 30±5grams were ...
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The aim of this study was to investigate the effects of increasing the hydrolyzed protein of canola meal on growth factors, expression of GH, IGF and ghrelin genes and beluga (Huso huso) juvenile body composition. For this purpose, 840 juveniles beluga with an average weight of 30±5grams were distributed in 12 tanks, 70 in each tank. Each tank has a capacity of 2400 liters. Canola meal hydrolyzed protein was fed with different levels of 0 (control), 300 (treatment 1), 400 (treatment 2) and 500 (treatment 3) mg of protein for 8 weeks. At the end of the breeding period, bioassay was performed to evaluate growth factors and biopsy of brain, stomach and liver tissue to evaluate the expression of these genes. The results showed that with increasing the amount of hydrolyzed protein in canola meal in the diet, body weight gain, specific growth rate and protein efficiency increased and the highest value was in treatment 3 (500 mg) which was a significant difference with other groups(P <0.05). Also, the expression of all 3 genes showed an increasing trend that the difference between treatments and control was significant (P <0.05). The highest expression was observed for all three genes in the 500 mg treatment. The lowest amount of protein was in treatment 3, but there was no significant difference in the amount of protein, fat, ash and moisture between the control and other treatments (P> 0.05). In general, hydrolyzed canola protein can positively affect growth performance in beluga fish.
