علوم زیستی دریا
Adel Ghabtani; Seyed Mohammad Mousavi; Annahita Rezaie; Mohammad Zakeri; Isac Zamani
Abstract
The purpose of this study was to evaluate the effects of three commercial probiotics (Bio-Aqua®, Bio-Aqua pond®, and Multi Behsil 100) on the growth, nutrition, and biochemical parameters of common carp fingerlings. For this purpose, 210 common carp fingerlings (with a mean weight: 9.6±0.02 ...
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The purpose of this study was to evaluate the effects of three commercial probiotics (Bio-Aqua®, Bio-Aqua pond®, and Multi Behsil 100) on the growth, nutrition, and biochemical parameters of common carp fingerlings. For this purpose, 210 common carp fingerlings (with a mean weight: 9.6±0.02 g and mean length: 12.9±0.32 cm) were randomly divided into 7 treatments (treatment 1 (control): basic diet without probiotics, treatment 2: 0.2 g of Bio-Aqua®, treatment 3: 0.1 g of Bio-Aqua®, treatment 4: 0.002 g/L of Bio-Aqua pond® dissolved in tank water, treatment 5: 0.001 g/L Bio-Aqua pond ® dissolved in tank water, treatment 6: 0.2 g of Multi Behsil 100, and treatment 7: 0.1 g of probiotic Multi Behsil 100) in triplicates, and 10 fish in each replicate. The commercial probiotics were added to the commercial diet, and the fish were fed based on body weight percentage for 60 days. Based on the results, the use of probiotics Bio-Aqua® and MultiBehsil 100, caused positive effects on the growth and nutrition parameters of common carp, although the use of 0.1 g of Bio-Aqua® per kilogram of the diet of common carp led to an improvement in growth, although, increasing the amount of this probiotic at the level of 0.2 g/kg led to negative effects on growth performance. The use of Multibehsil 100, caused positive effects on common carp. Thus, the best effect on growth performance and body composition was seen in the diet containing MultiBehsil 100 (0.1 and 0.2 g/kg of basic diet). Therefore, it can be concluded that the use of MultiBehsil 100 and Bio-Aqua® have favorable effects on common carp.
علوم زیستی دریا
Simin Ghoreishvandi; s m; Seyyed Nasrollah Hosseini; Annahita Rezaie
Abstract
In this study, post-mortem changes, including chemical, physical, microbial and sensorial changes, were performed in “Gatan” during ice storage. For this purpose, 18 fishes with Average weight 251.4 ± 4.24 g were transferred to the wet laboratory of Khorramshahr University of Marine ...
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In this study, post-mortem changes, including chemical, physical, microbial and sensorial changes, were performed in “Gatan” during ice storage. For this purpose, 18 fishes with Average weight 251.4 ± 4.24 g were transferred to the wet laboratory of Khorramshahr University of Marine Science and Technology, and in order to adapt to the laboratory conditions and to remove the stress caused by displacement, They were kept under favorable conditions for a week. Samples were catch immediately stored in ice for 72 hours, and meat quality indices were measured at 0, 6, 12, 24, 48 and 72 hours after death. The results showed that pH, TBA, FFA indices increased during storage period, TVBN initially decreased and then increased Microbiological studies also showed that the Cyrophile bacteria had no growth during the maintenance period. The amount of mesophilic bacteria at time zero was 2.53 ± 1.53 and then at 6, 12, and 24, it was descending process towards the zero hour. It then gradually increased and maintained at 1.72 ± 0.72 at the Seventy second hour of storage. Sensory evaluation of the fish showed that they had a suitable and acceptable condition for up to 24 hours after storage at the ice. During the maintenance period, the gradual decrease in acceptability was reduced and at 72 hours, most of the sensory analysis indexes obtained lower scores, and samples at that hour were the lowest quality during the maintenance period. Therefore, the use of ice to maintain long-term fish is not an appropriate method.
علوم زیستی دریا
mohammad rahimi; s m; Vahid Yavari; Annahita Rezaie
Abstract
For study of changes in energy metabolism of brain in rainbow trout during early life stages, some samples were collected from fish larvae and fingerlings with initial weight 1.35±0.15 during 7 months. Sample collection was randomly made in 12 stages (7 samples per every 8 days, 3 samples per ...
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For study of changes in energy metabolism of brain in rainbow trout during early life stages, some samples were collected from fish larvae and fingerlings with initial weight 1.35±0.15 during 7 months. Sample collection was randomly made in 12 stages (7 samples per every 8 days, 3 samples per every 2 weeks and 2 samples every one month). Brain tissue was dissected and transferred to nitrogen tank before analysis. The brain tissues were homogenized and the supernatant was adjusted to measurement of glycogen, glucose, lactate, lactate dehydrogenase, pyruvate kinase and glucose-6- phosphatase. Results revealed statistically changes in the metabolites during the sampling, so, glycogen and lactate concentration showed an increasing trend by increasing in fish age, but glucose concentration did not follow this trend. The minimum glucose concentration in brain tissue was observed in seventh stage of sampling. Concentration of metabolism enzymes was showed fluctuations and increasing trend during sampling. Finally, it is proposed that environmental and nutritional factors and different requirement of fish to energy in different stages of life may be effective on metabolites concentrations and metabolism enzymes activity.