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Showing 5 results for Alaf Noveirian

Z. Mahmoodi, H. Alaf Noveirian, B. Falahatkar, M.r. Khoshkholgh,
Volume 22, Issue 1 (4-2013)
Abstract

A feeding trial with three protein levels (30, 35 and 40%) and three lipid levels (10, 12 and 14%) was conducted to evaluate the optimum protein and lipid ratio of Caspian Kutum (Rutilus frisii kutum). Six hundred and seventy five fish (1.15±0.01g mean ±SD) were randomly distributed in 27 aquaria (45L) and were fed four times daily for 8 weeks. Results showed that interaction between protein and lipid did not significantly affect the growth parameters. Weight increased with increasing dietary protein level up to 35%, and then decreased significantly. Specific growth rate (SGR) and average daily growth (ADG) of fish fed the diets containing 35 and 40% protein increased with increasing lipid level, but protein efficiency ratio (PER) of fish decreased with increasing dietary protein level. Fish fed the diet containing 40% protein and 10% lipid showed the lower protein productive value (PPV). Lipid efficiency ratio (LER) of fish fed the diets containing 30 and 35% protein decreased significantly with increasing lipid level (p< 0.05). Lipid production value (LPV) of fish fed the 35% protein and 10% lipid was higher than those of other treatments. Results regarding to the analysis of body compositions showed that dietary protein levels made no significant differences among treatments, but the increase of lipid level in diets led to fish body lipid increase and the highest amount of lipid were observed in fingerlings fed 35% protein and 14% lipid. Survival was 100% in all treatment. In conclusion, it appears that Caspian Kutum juveniles could adapt to 14% dietary lipid without negative effects on growth and the diet containing 35% protein with 14% lipid would be suitable for optimum growth of Caspian
M. Etefaghdost, H. Haghighi, H. Alaf Noveirian ,
Volume 24, Issue 1 (4-2015)
Abstract

This research was carried out in order to identify the effects of different feeding frequency on growth indices, feed conversion ratio, survival and body composition of oriental river prawn (Macrobrachium nipponense) during 56 days. 180 oriental river prawns, with mean (±SE) weight 1.40±0.11g were counted and distributed randomly in twelve 70-liter glass tanks with 60 l water in 4 treatments each with 3 replicates cultured in same conditions (dietary feeding, dissolved oxygen, photoperiod, density, 2% feeding rate). Feeding were done 3, 4, 5 and 6 times/day with a constant commercial diet (50% protein, 13% fat, 12% ash, moisture 10-12 %). At the end of experiment, growth indices, feed conversion ratio, body composition ratio were measured for each treatment. Mean final weight, weight gain and specific growth rate in the treatment feeding 5 times/day was higher than the other treatments (p<0.05) but there was no significant difference in condition factor between treatments (p>0.05).The lowest feed conversion ratio was obtained in 5 times/day feeding and feeding 4 and 5 times/day treatments (68.80±1.8 and 77.60±2.5 %, respectively) had the highest survival rate. The highest body protein content (12.86±0.07 %) and fat content (3.46±0.02%) were obtained from the 5 times/day feeding. Results indicate that 5 times/day feeding has a significant difference in the increase of growth indices, survival rate, reduced feed conversion ratio, increased carcass protein and fat content, with other treatments (p<0.05).
M. Ettefaghdoost, H. Alaf Noveirian,
Volume 27, Issue 5 (1-2019)
Abstract

In this research, concentration of eleven elements (As, Fe, Hg, Zn, Pb, Se, Cd, Cr, Cu, Mn, Ni) in the muscle tissue of 40 Oriental river prawn (Macrobrachium nipponense) collected by bait trap from the Siah Darvishan River, Guilan province, Iran were determined using Varian Atomic absorption spectroscopy. The lowest and highest mean concentrations of metals were observed, as follows: Zinc 39.6-46.7, Copper 24.2-28.3, Iron 15.27-18.19, Manganese 3.36-3.82, Selenium 0.78-0.84, Arsenic 0.61-0.74, Lead 0.34-0.41, Nickel 0.34-0.41, Chromium 0.16-0.20, Cadmium 0.12-0.15 and Mercury 0.069-0.078 (μg g–1d.w.), respectively. According to the results of this study, mean concentrations of all elements in the muscle tissue of Oriental river prawn, except for Arsenic and Manganese were less than threshold limit value recommended by FAO/WHO international standard.
 

Mohammad Ettefaghdoost, Hamid Alaf Noveirian, Mir Masoud Sajjadi, Bahram Falahatkar,
Volume 29, Issue 5 (12-2020)
Abstract

The present study was conducted to investigate the effect of different levels of astaxanthin pigment on growth indices, feed efficiency and biochemical composition of Oriental river prawn. In this study, 225 prawns with mean weight of 1.40±0.05 g were fed by 5 dietary treatments containing different levels of astaxanthin zero (control), 50, 100, 150 and 200 mg astaxanthin per kg diet for 8 weeks. Results at the end of the experiment showed that the diets containing astaxanthin showed a significant difference with the control treatment (p<0.05). However, hepatosomatic index was not affected by different astaxanthin treatments (p>0.05). The highest weight gain, survival rate and lowest feed conversion ratio were observed in 150 mg astaxanthin per kg diet. Carcass moisture, protein and lipid were significantly different from control treatment (p<0.05) but the ash of experimental treatments had no significant difference with control treatment (p>0.05). The results of this study showed that increased levels of dietary astaxanthin improved the growth and nutritional indices of the Oriental river prawn and adding 150 mg per kg astaxanthin to the diet was suggested to improve the growth performance, feed efficiency and carcass quality of this prawn.
 
Mohammad Ettefaghdoost, Hamid Alaf Noveirian, , Bahram Falahatkar,
Volume 30, Issue 4 (11-2021)
Abstract

In the present experiment, two hundred and twenty-five oriental river prawns (Macrobrachium nipponense) with mean weight of 1.40±0.05 gram were fed by five formulated diets containing different astaxanthin levels, zero (control), 50, 100, 150 and 200 milligrams per kilogram in glass aquarium tank for eight weeks. At the end of the culture period, after collecting hemolymph and also the tissues of intestinal tract, muscle and exoskeleton were sampled, hemolymph biochemical parameters, total carotenoid content and intestinal microbial flora in prawns were studied. Hemolymph biochemical parameters such as urea, urea nitrogen, glucose, creatinine and triglycerides were decreased with increasing of astaxanthin levels, while HDL and LDL increased significantly (p<0.05). However, uric acid, calcium, phosphorus and cholesterol were not affected by astaxanthin treatments (p>0.05). Treatments containing 150 and 200 mg/kg astaxanthin showed the lowest total bacterial count. Intestinal lactic acid bacteria also increased in the treatment of 150 mg/kg astaxanthin (p<0.05). Total carotenoid content of prawns was elevated by increasing dietary astaxanthin levels (p<0.05). Generally, the results of present study showed that increasing dietary astaxanthin levels improves hemolymph biochemical parameters, total carotenoid content and intestinal microbial flora of the oriental river prawn and adding 150 milligrams astaxanthin per kilogram of this pigment to the diet was suggested to improve the parameters that mentioned of this prawn.

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با کسب مجوز از دفتر کمیسیون بررسی نشریات علمی وزارت علوم، تحقیات و فنآوری مجله علمی شیلات بصورت آنلاین می باشد و تعداد محدودی هم به چاپ می رساند. شماره شاپای جدید آن ISSN:2322-5998 است

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