علوم زیستی دریا
Iman Amirzadekani; Nasim Zanguee; Seyed Mohammad Mousavi; Mohammad Zakeri
Abstract
270 fish (with an average initial weight: 20.04±0.19 g) were randomly distributed in 27 polyethylene tanks and fed by the carp commercial diet. The experimental treatments of 9 groups (4 groups with 3, 6, 9, and 12% of alfalfa powder, 4 groups with 1, 2, 3, and 4% of alcoholic extract and one ...
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270 fish (with an average initial weight: 20.04±0.19 g) were randomly distributed in 27 polyethylene tanks and fed by the carp commercial diet. The experimental treatments of 9 groups (4 groups with 3, 6, 9, and 12% of alfalfa powder, 4 groups with 1, 2, 3, and 4% of alcoholic extract and one control group) with three replications were considered for 8 weeks. At the end of the experimental period, the activity of digestive enzymes was measured in terms of U/mg Protein and liver composition. Based on the results, the highest levels of activity of digestive enzymes, amylase (674.74±61.57), lipase (6/21±/096), alkaline phosphatase (452.84±28.18), trypsin (282.05±19.98) and chymotrypsin (0.10±0.001) in the extracts of 3%, 3%, 3%, 4% and 4% extracts, respectively, and the lowest amount of these enzymes were observed respectively with values of 388.17±38.27 (control), 2.51±0.55 (control), 187.7±19.36 (12% powder), 0.030±0.004 (12% powder) and 132.47±11.47 (9% powder) (P <0.05). The highest amount of hepatic glycogen (338.35±192.13 µg/g tissue) was measured in the 3% extract treatment and the lowest amount of hepatic glycogen (607.01±101.23 µg/g tissue was in the control treatment (P <0.05). The highest level of liver lipids (146.51±6.05 mg/g tissue) was observed in the treatment of 6% powder and the lowest level of liver lipids (72.99±4.46 mg/g tissue) was observed in the treatment of 12% powder (P <0.05). According to the present study, adding powder and especially alfalfa extract to the diet can increase the activity of digestive enzymes and increase liver lipid and glycogen at certain levels.
علوم زیستی دریا
TAYEBEH ASADI; n z; s m; v y
Abstract
In the recent decades, using of herbs and herbal extracts as growth promoters and immunostimulants in aquaculture has been increased. In the current study, effects of Ginger (Zingiber officinale) extract on hematological and some serological parameters and growth performance of Barbus sharpeyi (Gunther, ...
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In the recent decades, using of herbs and herbal extracts as growth promoters and immunostimulants in aquaculture has been increased. In the current study, effects of Ginger (Zingiber officinale) extract on hematological and some serological parameters and growth performance of Barbus sharpeyi (Gunther, 1874( fingerlings were studied. Four levels of ginger extract including 0 (Control group), 0.1, 0.5 and 1 per cent were added to basic diet. Fish were fed twice a day as 3 per cent of body weight for 8 weeks. At the end of the experimental period, biometry was performed and blood samples were collected from caudal vein. The results have shown that administration of ginger extract supplemented diets did not significantly affect growth indexes (WG and SGR) (p ≥ 0.05). On the other hand, different levels of ginger extract could significantly increase WBC count, hematocrit and some hematological parameters. Also, Serum lysozyme activity and serum total protein and albumin were significantly increased after using ginger extract (p ≤ 0.05). based on the results obtained from this study, ginger extract may be used as a growth promoter and immunostimulant in Barbus sharpeyi.