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.
Reza Changizi; Hamed Manouchehri; Seyed Mehdi Hosseinifard; Shayan Ghobadi
Abstract
AbstractThis research was carried out to evaluate the effects of different levels of Siberian Bimini Immo on growth, nutrition and survival indices in Convict cichlid fish (Amatitlania nigrofasciata) for 60 days. The experiment was designed by using randomized method including control, 0.5, 1 and 1.5 ...
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AbstractThis research was carried out to evaluate the effects of different levels of Siberian Bimini Immo on growth, nutrition and survival indices in Convict cichlid fish (Amatitlania nigrofasciata) for 60 days. The experiment was designed by using randomized method including control, 0.5, 1 and 1.5 g of Biomin Imbo synbiotic per kg of diet in four treatments with three replications. Based on the results, BWI, PBWI, SGR, and PER and FCR in 1 g / kg synbiotic had a significant improvement compared to other treatments (P <0.05). Also, the amount of CF significantly increased in treatment of 0.5 g / kg synbiotic (P <0.05). In terms of survival, no casualties were observed among treatments. According to the results of this study, it can be concluded that the addition of synbiotic to diet, especially at 1 g / kg, can be effective in some of the growth and feeding factors of Green Terror fish, and as a supplement Suitable for the diet of this species.
Herbal
Reza Changizi; Shayan Ghubadi; Zahra GhiyasVand; Mahshid ShamloFar
Abstract
In this study, we have investigated the effects of red hawthorn powder= Valik (RHP) (Crataegus monogyna) as a natural pigment sources and Astaxanthin as synthetic pigment source on growth, and skin color of Severum (Heros severus) with initially average weight 8.5 ± 0.57 for a period of 60 days. ...
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In this study, we have investigated the effects of red hawthorn powder= Valik (RHP) (Crataegus monogyna) as a natural pigment sources and Astaxanthin as synthetic pigment source on growth, and skin color of Severum (Heros severus) with initially average weight 8.5 ± 0.57 for a period of 60 days. Basal diet was supplemented with 0 (control), 1 g kg-1 Astaxanthin, 5, 15 and 25 g kg-1RHP in a totally randomized design trial in triplicate groups. The results showed significant differences in growth and skin color between control and treatment groups (P<0.05). There was a statistically significant increase (P<0.05) in growth performances level in group treated with 25 g kg-1RHP. The highest and the lowest growth performances were observed in control and 25 g kg-1RHP, respectively. Total carotenoid content of the fish was determined spectrophotometrically at the end of the experiment. As a result, a visible change of color in the skin of the fish fed on the feed containing Astaxanthin was observed with 0.58±0.2 mg g-1 of pigment accumulation while a relatively change of color was observed in the skin of other fish that were fed on the feed containing powder RHP with 0.54±0.2 mg g-1 of pigment accumulations, respectively (p>0.05). Therefore, it was determined that these pigment sources have an effect on the color of Severum fish.
