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  • 1
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    An investigation on feasibility of introduction of Tilapia to aquaculture industry of inland brackish waters at desert areas of Iran (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Use of underground inland water for fisheries aims is improved all over the world. Tilapia is the first candidate for brackish water fish culture and an economic fish based on its biological characteristics. Tilapia was entered to Iran for the first time in November 2008. Bafq area at the center of Iran was licensed by Environment Organization, because of closed underground water resources of the area. Studies showed desired growth and adaptation of Nile tilapia in brackish water earth ponds and fiber glass tanks with high survival and low FCR. Limnological factors were suitable for tilapia culture. All male samples were made using certain doses of methyl testosterone in defined period. Optimum level of protein, fat and energy were determined for the best growth and food performance of cultured tilapia. Environmental program was presented to prevent environmental problems. However, studied shoed tilapia culture had not negative effects in the area. Economical performance of tilapia culture project was desirable. Tilapia was successfully introduced to some private fish farms in June 2011. Tilapia culture may improve in center of Iran after environmental surveys.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Tilapia ; Aquaculture ; Monosex ; Feeding ; Environment
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 76pp.
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  • 2
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    A study on growth parameters, blood factors and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in underground brackish and freshwater (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this research, growth rate, blood parameters and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in brackish and freshwater were evaluated. Two treatments (brackish and freshwater) in 3 replications were investigated. Six 1.5 m³ fiberglass tanks were used for this experiment, containing 180 rainbow trout specimens with average weight of 47.2±0.1g. Feeding rate in treatments was about 3% of body weight based on water temperature and fish biomass. Total length and weight of fish were measured in 15 days intervals. After 135 days of culture period, some fish samples were transferred to the Lab. Blood were directly collected from the heart. Muscle composition was analyzed for proximate composition. The results showed that the body weight of samples in brackish water was increased significantly after 45 days of culture period. Blood factors including WBC, RBC, Hb, Hct, MCV, MCH, MCHC, lymphocyte, thrombocyte and concentration of K+ ions in fish cultured in brackish water showed a significant increase (P〈0.05). Muscle composition analysis showed a significant increasing (p〈0.05) in fat and dry matter in freshwater treatment, while moisture was significantly higher in brackish water (P〈0.01)
    Description: Published
    Keywords: Biology ; Physiology ; Oncorhynchus mykiss ; Brackish ; Rainbow trout ; Brackish water ; Freshwater ; Blood factors ; Proximate composition ; Growth ; Feeding
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.836-842
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  • 3
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    Study on nursery growth performance of Pacific white shrimp (Litopenaeus vannamei Boone, 1931) under different feeding levels in zero water exchange system (2018)
    Details
    Publication Date: 2021-05-19
    Description: Effect of different feeding levels on water quality, growth performance, survival rate and body composition of Pacific white shrimp Litopenaeus vannamei post larvae were studied in zero water exchange system. Shrimp post larvae with mean weight of 74.46± 6.17 mg were fed for 32 days in 300L fiberglass tanks containing 130L water at density of 1 post larvae L-1. There were five treatments including control and four biofloc treatments with different feeding levels of 15%, 15%, 12%, 9%, 0% of body weight per day, respectively. The results showed that there were no significant differences in water parameters such as dissolved oxygen and pH between different treatments (p〉0.05). There were significant differences in water ammonia level between different treatments (p〈0.05). The maximum (0.39 mg/L) and minimum (0.12 mg/L) levels of ammonia were observed in control and biofloc treatment with minimum feeding level (9%BW/day), respectively. The highest body weight gain (1.55g), growth rate (48.50 mg per day), specific growth rate (9.64%/day), biomass gain (182.1g) and body length increase (33.62mm) were observed in biofloc treatment with maximum feeding level. The highest feed conversion ratio and the lowest feed efficiency were obtained in control (p〈0.05). The proximate body composition analysis revealed an increase in lipid, protein and ash in biofloc treatments. Results showed that using biofloc technology can decrease water exchange amount and improve feed utilization in nursery culture of Pacific white shrimp. Moreover, presence of biofloc improved the water quality which led to the enhancement in growth performance in nursery stage of shrimp.
    Description: Published
    Keywords: Aquaculture ; Litopenaeus vannamei ; Biofloc technology ; Zero-water exchange system ; Water quality ; Growth performance ; Body composition ; Nursery ; Pacific white shrimp ; Feeding ; Levels ; Biomass
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 1465-1484
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  • 4
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    Effects of using different C/N ratios in biofloc system on growth performance, feeding and water quality indices of common carp (Cyprinus carpio) culture (2020)
    Details
    Publication Date: 2021-05-19
    Description: Effects of using various ratios of C:N in biofloc system on growth performance, feeding indices and culture water quality of common carp with mean weight of 14.17±0.36 g were investigated during 90 days in experimental treatments including control (no extra carbon source) and four treatments with different C:N ratios of 11, 15, 19 and 23 each with 3 replicates. The increase in C:N ratio had a significant effect on growth and feeding indices of cultured common carp in treatments (p〈0.05). The highest final weight and weight gain, the lowest FCR and the highest SGR were observed in C:N ratio of 19. No significant difference was observed in survival rate among different treatments indicating that the culture condition was suitable for common carp in this biofloc system. Hepatosomatic and visceral indices did not show significant differences between treatments with different C:N ratios (p〉 0.05). Water quality indices including DO, pH, TDS, EC, TSS, FV, TAN, nirtite and nitrate showed significant differences in biofloc system with different C:N ratios (p〈0.05). The mean values of FV and TSS in biofloc system increased with increasing C:N ratio. The variation pattern of the mean TAN and nitrite were the same as each other and reverse to the trend of TSS and FV showed a decreasing trend with increasing C:N ratio. These trends indicate the significant removal of nitrogenous compounds by bioflocs. In conclusion, using C:N ratio of 19 with molasses as carbon source in biofloc system could be recommended to improve water quality, growth and feeding performance of cultured common carp.
    Description: Published
    Keywords: Cyprinus carpio ; Fish ; Biofoc system ; Water quality ; Feeding
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.13-24
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  • 5
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    Evaluation of egg vitamins A and E content in rainbow trout (Oncorhynchus mykiss Walbaum, 1792) broodstock affected by different levels of synthetic and natural (Heamatococcus pluvialis) astaxanthin (2017)
    Details
    Publication Date: 2021-05-19
    Description: In present research, effect of dietary astaxanthin levels in sources of synthetic and algal on vitamins A and E content of egg rainbow trout broodstock was investigated, totally for 120 days. It was considered seven groups consisting six treatments (T1-T6) in two different astaxanthin sources and control (C). According to experiment design, treatments were arranged as algal astaxanthin (Haematococcus pluvialis) in the three levels of 2.67, 3.55 and 8gr/kg food (T1, T2, T3); and synthetic astaxanthin in three levels of 40, 80 and 120mg/kg food (T4, T5, T6). Egg vitamins A and E content in obtained eggs from all treatments during spawning season was measured. The highest (280.88± 22.51 ng) and the lowest (147.82± 12.71ng) amount of vitamin A were observed in T2 and control group, respectively. The highest (19.71± 2.92µg) and the lowest (5.27± 0.51µg) amount of vitamin E were obtained in T3 and control group, respectively. By increasing level of astaxanthin in both sources of algal and synthetic, content of vitamin E in egg increased but the effect of algal source on these indices was more perfect. In general present study show that, feeding broodstock affected on quality content of egg, It also concluded that natural astaxanthin (Haematococcus pluvialis) for the reason that contains supplementary nutritious, is extraordinary preferable than synthetic astaxanthin to improve vitamins content of egg in rainbow trout.
    Description: Published
    Keywords: Rainbow trout ; Oncorhynchus mykiss ; Heamatococcus pluvialis ; Astaxanthin ; Evaluation ; Eggs ; Vitamins A ; Vitamin E ; Levels ; Synthetic ; Feeding ; Algal ; Spawning
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.27-40
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  • 6
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    An investigation on feasibility of introduction of tilapia to aquaculture industry of inland brackish waters at desert areas of Iran (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25427 | 18721 | 2018-09-23 16:32:16 | 25427 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Use of underground inland water for fisheries aims is improved all over the world. Tilapia is the first candidate for brackish water fish culture and an economic fish based on its biological characteristics. Tilapia was entered to Iran for the first time in November 2008. Bafq area at the center of Iran was licensed by Environment Organization, because of closed underground water resources of the area. Studies showed desired growth and adaptation of Nile tilapia in brackish water earth ponds and fiber glass tanks with high survival and low FCR. Limnological factors were suitable for tilapia culture. All male samples were made using certain doses of methyl testosterone in defined period. Optimum level of protein, fat and energy were determined for the best growth and food performance of cultured tilapia. Environmental program was presented to prevent environmental problems. However, studied shoed tilapia culture had not negative effects in the area. Economical performance of tilapia culture project was desirable. Tilapia was successfully introduced to some private fish farms in June 2011. Tilapia culture may improve in center of Iran after environmental surveys.
    Keywords: Aquaculture ; Iran ; Bafq ; Tilapia ; Aquaculture ; Monosex ; Feeding ; Environment
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 76
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  • 7
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    Responsible aquaculture: feeding management and preparation of guidelines (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25483 | 18721 | 2018-10-02 10:10:50 | 25483 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this study, data were gathered from library research, discussing with feed and feeding experts in warm and cold water fish farms and also from research project implemented by executer. Standardization on selection of materials and ingredients percentage in order to prepare dry pellet feed for these two kind of cultured fishes emphasized on proximate composition energy, carbohydrate, protein with amino acids profile, lipid with fatty acid profile, minerals and vitamins and also feeding frequency, kind of feed pellet manufacture were codified environmental friendly, according to responsible aquaculture. On the other hand, feed color, taste, smell, their attraction and the best physico-chemical condition for storing of in order to get optimum result of responsible aquaculture were recorded.
    Keywords: Aquaculture ; Iran ; Responsible Aquaculture ; Nutritional Standardization ; Coldwater fish ; Warm water fish ; Aquaculture ; Feeding ; Preparation
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 103
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  • 8
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    Responsible Aquaculture: Feeding Management and Preparation of Guidelines (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study, data were gathered from library research, discussing with feed and feeding experts in warm and cold water fish farms and also from research project implemented by executer. Standardization on selection of materials and ingredients percentage in order to prepare dry pellet feed for these two kind of cultured fishes emphasized on proximate composition energy, carbohydrate, protein with amino acids profile, lipid with fatty acid profile, minerals and vitamins and also feeding frequency, kind of feed pellet manufacture were codified environmental friendly, according to responsible aquaculture. On the other hand, feed color, taste, smell, their attraction and the best physico- chemical condition for storing of in order to get optimum result of responsible aquaculture were recorded.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Responsible Aquaculture ; Nutritional Standardization ; Coldwater fish ; Warm water fish ; Aquaculture ; Feeding ; Preparation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 103pp.
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  • 9
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    Effect of different feeding levels on water quality, growth performance and survival of western white shrimp (Litopenaeus vannamei Boone, 1931) post larvae with application of biofloc technology (2017)
    Details
    Publication Date: 2021-05-19
    Description: In this study, effect of different feeding levels on water quality, growth performance and survival of western white shrimp Litopenaeus vannamei post larvae were studied in biofloc rearing system. Shrimp postlarvae of PL10 with mean weight of 3±0.7 mg and mean length of 4.4± 0.93 mm were fed for three weeks in fiberglass containers with 200 liters volume of water and density of 10 post larvae per liter in four tretments including one control with water exchange and three biofloc treatments at different feeding levels of 25, 20 and 15% of body weight. According to the results, in the values of water quality parameters including salinity, dissolved oxygen, pH, nitrite and nitrate, no significant differences were observed among the groups (p〉0.05). The highest increase in body weight (58.42 mg), growth rate (2.78 mg per day), specific growth rate (15.09 %/day), biomass (84020 mg) and survival rate (71.9%) were obtained in biofloc treatment at 25% feeding level .The highest feed conversion ratio (2.05) and the lowest feed efficiency (48.62%) were obtained in water exchange treatment without floc, showing significant difference compared to the other treatments (P 〈0.05). The results from this study reveals that by using biofloc rearing technology can decrease the amount of water exchange and feed utilization compared to body weight in culture of western white shrimp post larvae. Moreover, the presence of biofloc improves growth performance and production of L. vannamei post larvae in biofloc rearing system.
    Description: Published
    Keywords: Shrimp ; Litopenaeus vannamei ; White shrimp ; Biofloc technology ; Feeding ; Levels ; Water quality ; Growth ; Performance ; Survival ; Feed
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.13-28
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