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  • Aquaculture  (6)
  • 1
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    Cold pasteurization of rainbow trout fillet (Oncorhynchus mykiss) with gamma rays and shelf life assessment at refrigerated condition (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25320 | 18721 | 2018-09-12 09:47:39 | 25320 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The present study was conducted to evaluate the effect of different doses of gamma rays on shelf life and fatty acids composition of Rainbow trout fillet (Oncorhynchus mykiss) during refrigerating condition. Quality and shelf life of non-irradiated and irradiated (0, 0.75, 1.5, 2.25, 3, 3.75 and 4.5 kGy) Rainbow trout stored at +4 C was investigated by measurement of microbiological, chemical and sensory analysis .Irradiation of fillets was performed by gamma rays from a Co60 source. Microbial counts for non-irradiated trout fillet samples were higher than respective irradiated fish. Total volatile base nitrogen (TVB-N) values was increased from 7 mg/100 g for non-irradiated to 52.7 mg/100 g after 15 days storage at refrigerator, whereas for irradiated fish lower values of 39.4, 37.6, 28.7, 25.6, 24.8 and 23.2 mg/100 g were recorded at 0.75, 1.5, 2.25, 3, 3.75 and 4.5 kGy, respectively (day 15).initial amount of peroxide value in non irradiated sampleswas 0.8 meq/kg and was increased to 7 meq/kg (7 day).Highest amount of peroxide after irradiation process was belonged to samples irradiated by 4.5 kGy (1.5 meq/kg). Also, total viable count of irradiated samples were decreased significantly (p〈0.05). On nutritional aspect, results showed that total saturated fatty acid concentrations increased significantly (p〈0.001) with increasing irradiation dose , so that the control sample and fish muscles that irradiated with 4.5 kGy had the lowest and highest amounts of total saturated fatty acids (20.454 ± 0.011% and 19.228 ± 0.040% , respectively). The amount of total polyunsaturated fatty acids (PUFAs) in irradiated samples were significantly lower than control sample (p〈0.001) and amounts of total monounsaturated (MUFAs) were significantly higher than control samples (p〈0.001). The results were indicated that the highest content of MUFAs and PUFAs were in samples irradiated with 3.75kGy (37.783± 0.092 %) and control samples (37.677± 0.104 %), respectively .The lowest level of MUFAs and PUFAs were in control samples (36.596 ± 0.024%) and 4.5 kGy (36.459 ± 0.047%), respectively. Altogether, results of this study were determined that irradiation treatment changes significantly the fatty acid composition especially polyunsaturated fatty acids in rainbow trout muscle (P〈0.001). Overall, irradiation of fillet by 3.75 kGy had best results on increasing shelf life of fillet at refrigerator (between 11-15 days) and had no advers effect on fatty acid composition of Rainbo trout fillet.
    Keywords: Aquaculture ; Fisheries ; Iran ; Irradiation ; Rainbow trout ; Fillet ; Shelf Life ; Fatty acid ; Refrigerator ; Pasteurization ; Oncorhynchus mykiss ; Gamma Rays ; Samples
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 108
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  • 2
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    Warm water cultured fishes in Kermanshah province study on the possibility of improving (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25394 | 18721 | 2018-09-18 05:38:30 | 25394 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: For the improve handling of carp cultured fishes in Kermanshah province we chose 4 treatment out of that one treatment was the best, this included fish+powdered ice with C.S.W tank transported with a roof covered car in all treatment fish are tested physically and chemically and microbiologically, also temperature of fish body and environment was taken periodically andattempt for biometry and weight ranges of fishes also did in each study.
    Keywords: Aquaculture ; Iran ; Kermanshah province ; Warm water fish ; Culture ; Carp ; Weight ; Fish
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 85
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  • 3
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    The study and feasibility of Cheshmeh-Ali River and down stream area of Shahid Shah-Charaghy Dam in Damghan for aquaculture development (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25507 | 18721 | 2018-10-05 07:40:08 | 25507 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This research was conducted to finding of Cheshmeh-Ali and Shahcheraghi-Dam downstream areas potential for developing of aquaculture industry. The present study was conducted based on available information and data from monthly and seasonally sampling including geographical area, margin lands and fluctuations of river water, seasonal climatic changes view point of rainfall, temperature, wet, evaporation, wind velocity, sunshine hours, frost and also chemical and physical parameters of water including temperature, alkalinity, total hardness, chloride, calcium, magnesium, sodium, potassium, organic phosphorous and nitrogen, suspended solids, turbidity, water flow and flood conditions, and in addition phytoplankton and zooplankton communities, macrobenthic invertebrates, fishes, aquatic plants, amphibians, reptiles, birds. Results showed that the upstream and downstream regions of Shahcheraghi dam are not suitable for warm water aquaculture in earthen ponds. But view point of cold-water aquaculture, particularly trout, there are some good situations. Also it can be suggested different culture systems including of race way, octagonal concrete ponds, semi-circulation and circulation methods. But, due to water restrictions in the area, semi-circulation and circulation system is preferred. In ideal conditions can be produced about 1,600 tones of trout, if all the capacity of this area be used for aquaculture. Otherwise, in limited circumstances view point of exploitation possibility of the water, only about 700 tons can be produced. In addition, there were appropriate facilities in spring area of Cheshmehali for tourism industry, that it can be considered as priorities for economic development in the region. Due to the low sensitivity of the ecologically conditions, native or exotic aquatic species rearing in indoor methods can be recommended.
    Keywords: Aquaculture ; Iran ; Semnan Province ; Damghan ; Shahcheraghi Dam ; Cheshmeh-Ali River ; Site selection ; Aquaculture capacity ; Sampling ; Temperature ; Turbidity ; Culture
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 71
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  • 4
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    Artificial propagation and Culture of Rutilus frisii kutum of Autumn form for restocking (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25202 | 18721 | 2018-09-05 16:22:51 | 25202 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The Kutum, Rutilus frisii kutum, is one of the most important bony fishes in Iranian coastal of Caspian Sea. Its harvest range is between 9000-10000 tons in a year, nearly 60% of the income of Bony fish fishery produced by kutum fishery. The stock of this species reduced drastically in 1982 and the catch slumped to the less than 250 tons in a year. Kutum spawning grounds deterioration, illegal catch, and lack of restocking program were the main cause of the decline. This Spices in nature comprised by two distinct form, autumn and spring form. It is worth to be mentioned, by the effect of Caspian Sea Bony fishes Research Center s experts in 1983, artificial spawning and releasing the fries to the sea were commenced and the catch steadily improved. But all activities concerning restocking of kutum concentrated in spring form, as at present about 260 million its fries are released into sea for restocking by Iranian Fisheries Organization, but for above reasons and lack of restocking program, the populations of autumn form gravely shrinked and neared to be extinct. Therefore, to enhance the biodiversity and boost fishers livelihood of kutum in Caspian Sea this project implemented by cooperation of Iranian Fisheries Organization (IFRO) and Caspian Environment Program (CEP) in Aquaculture Institute (Inland Waters). In this project, brooders caught from Anzali lagoon and maintained in two different condition, include of floating cages in Anzali lagoon and earthen ponds in Sefidrud Fisheries Research Station. The results showed that there weren’t significant differences between two maintenance statuses in maturation period and other reproductive characteristics of brooders. The ratio of male to female was 1 to 1.4. Minimum and maximum weight measured 1450 to 3100 g (with average of 1850 g) in female and 670 to 1900 g (with average of 1165 g) in male, respectively. The first natural spawning of brooders occurred in the end of January in temperature of 8 till 10 °C in concrete ponds. Also, some of maintained brooders in earthen ponds spawned in February. The average number of absolute, function and relative fecundity determined 88565 16809, 73805 14008 and 48670 12056, respectively. For artificial spawning, male and female brooders injected by pituitary gland with dose of 2-3 and 4-5 mg/kg body weight, respectively. Approximately, 10 and 8 present of female were over-ripe and immature in March (artificial spawning time), respectively. More than 59 % of injected female brooders induced to spawning in first stage after 10-12 hours and 13 % of them in twice stage and 7-8 hours after first stage. And also, 27.6% of females didn’t positive response to injection. Dry method used for eggs fecundity and incubation period lasted 7- 10 days in 14-16 °C. In totally, eggs fertilization were more than 95% and the average of eggs fertilization percent in throughout of period measured more than 92.7 6 %. Eyed eggs appearance occurred 3 days after fecundity and its mean was 92.7 15.1%. Larvae after yolk sac absorption feed with dry milk for 4-5 days and then introduced into fertilized earthen ponds (500 m2 and equipped to aerators) in intensive condition and fed with micro pellet food for 3-4 month. In finally, more than 1.8 million fries of 1-2 g and some more than 5 g produced and released into Anzali lagoon to its restocking for first time. It is expected that continuing of restocking process of autumn form kutum by Iranian Fisheries Organization eventuate to population increasing of this form in Caspian Sea in future.
    Keywords: Aquaculture ; Iran ; Caspian Sea ; Anzali Lagoon ; Sefidrud River ; Artificial propagation ; Culture ; Rutilus frisii kutum ; Kutum ; Bony Fish ; Fishery ; Spawning ; Biodiversity ; Aquaculture ; Brooders ; Fecundity ; Male ; Female ; Population
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 79
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  • 5
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    Development of technology to extract beta-carotene natural colors from Azolla (Azolla filiculoides) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25808 | 18721 | 2018-10-13 08:54:24 | 25808 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The present project was aimed at determining the content, quality, and purity of β-carotene extracted from Azolla filiculoides in the Anzali Wetland, comparing it with synthetic β-carotene, and measuring its economic value. One treatment had β-carotene derived from Azolla filiculoides in the Anzali Wetland through the alkaline hydrolysis method in the summer of 2014. Treatments were kept at 4°C for one year. Synthetic β-carotene was used as the control. The quality of the treatments was assessed by applying some chemical tests, including the measurement of the content and quality of β-carotene, colorimetry using the Hunter-LAB method, determination of the purity and vitamin A employing high-performance liquid chromatography (HPLC), estimation of the dwell-time duration at 5°C, and measurement of the solubility of β-carotene in water. Beta carotene of Azolla in the spring extracted to alkaline hydrolysis was11853 mg/kg, in summer was 9935mg/kg, in autumn was 11256 mg/kg and in winter was 11245 mg /kg. Beta carotene of Azolla in the spring extracted to organic solvent was 8347 mg/kg, in summer was 6648 mg/kg, in autumn was 7543 mg/kg and in winter was 7539 mg/kg. The amount of beta-carotene is extracted using organic solvents and alkaline hydrolysis in the summer compared to other seasons showed a significant reduction (P〈0.05). The amount of beta-carotene in the spring were significantly increased compared to the other seasons (P〈0.05). This factor (organic solvent and alkaline hydrolysis) in autumn and winter showed no significant difference (P〉0.05). The extracted amounts of beta-carotene in organic solvents compared to alkaline hydrolysis method in seasons spring, summer, autumn and winter was difference significant (P〈0.05). The results of tests included determining the purity, concentration, colorimetry, compounds soluble vitamins and beta-carotene in organic solvents compared to alkaline hydrolysis significant reduction (P〈0.05). During the shelf life of one year at 5°C, these factors had no significant difference between treatments alkaline hydrolysis and organic solvents (P〉0.05). According to the harvesting Azolla of wetland is not requires special equipment and in terms of time a lot of Azolla can be harvested in a short time and also for the extraction of beta-carotene from Azolla Anzali Lagoon is not requires special equipment, too, have no economic value of raw material, does not require special conditions for growing, doubling in three days, Azolla is rich in beta-carotene, beta-carotene extraction of large quantities of small amounts of starting material, the cost of chemical materials, labor, fuel, Laboratory equipment required and the cost of importing small packages beta-carotene, beta-carotene into the country in terms of economic cost compared to the cost of imported Sigma beta carotene is economical. As shown in Table 5 in the samples prepared by alkaline hydrolysis in comparison with synthetic chemical manufactured by Sigma in terms of colorimetric tests, purity, composition and solubility of vitamins significant difference was not observed (P〉0.05). But, in samples prepared by organic solvents in comparison with synthetic chemical manufactured by Sigma in terms of colorimetric tests, purity, composition and solubility of vitamins significant difference was observed (P〈0.05). According to significant differences between the amount of betacarotene extracted from Azoula wetland compared to other seasons in spring and autumn and winter plant growth in spring Azoula alkaline hydrolysis method for the extraction of beta-carotene wetland and wetland Azolla is recommended.
    Keywords: Aquaculture ; Management ; Iran ; Wild Azoula ; Azola filiculodes ; Natural pigment ; Purity of beta-carotene ; Colorimetric ; HPLC ; Additives
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 48
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  • 6
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    Artificial Propagation and Culture of Rutilus frisii kutum of Autumn Form for Restocking (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The Kutum, Rutilus frisii kutum, is one of the most important bony fishes in Iranian coastal of Caspian Sea. Its harvest range is between 9000-10000 tons in a year, nearly 60% of the income of Bony fish fishery produced by kutum fishery. The stock of this species reduced drastically in 1982 and the catch slumped to the less than 250 tons in a year. Kutum spawning grounds deterioration, illegal catch, lack of restocking program were the main cause of the decline. This Spices in nature comprised by two distinct form, autumn and spring form. It is worth to be mentioned, by the effect of Caspian Sea Bony fishes Research Center s experts in 1983, artificial spawning and releasing the fries to the sea were commenced and the catch steadily improved. But all activities concerning restocking of kutum concentrated in spring form, as at present about 260 million its fries are released into sea for restocking by Iranian Fisheries Organization, but for above reasons and lack of restocking program, the populations of autumn form gravely shrinked and neared to be extinct. Therefore, to enhance the biodiversity and boost fishers livelihood of kutum in Caspian Sea this project implemented by cooperation of Iranian Fisheries Organization (IFRO) and Caspian Environment Program (CEP) in Aquaculture Institute (Inland Waters). In this project, brooders caught from Anzali lagoon and maintained in two different condition, include of floating cages in Anzali lagoon and earthen ponds in Sefidrud Fisheries Research Station. The results showed that there weren t significant differences between two maintenance statuses in maturation period and other reproductive characteristics of brooders. The ratio of male to female was 1 to 1.4. Minimum and maximum weight measured 1450 to 3100 g (with average of 1850 g) in female and 670 to 1900 g (with average of 1165 g) in male, respectively. The first natural spawning of brooders occurred in the end of January in temperature of 8 till 10 °C in concrete ponds. Also, some of maintained brooders in earthen ponds spawned in February. The average number of absolute, function and relative fecundity determined 88565 16809, 73805 14008 and 48670 12056, respectively. For artificial spawning, male and female brooders injected by pituitary gland with dose of 2-3 and 4-5 mg/kg body weight, respectively. Approximately, 10 and 8 present of female were over-ripe and immature in March (artificial spawning time), respectively. More than 59 % of injected female brooders induced to spawning in first stage after 10-12 hours and 13 % of them in twice stage and 7-8 hours after first stage. And also, 27.6% of females didn’t positive response to injection. Dry method used for eggs fecundity and incubation period lasted 7- 10 days in 14-16 °C. In totally, eggs fertilization were more than 95% and the average of eggs fertilization percent in throughout of period measured more than 92.7 6 %. Eyed eggs appearance occurred 3 days after fecundity and its mean was 92.7 15.1%. Larvae after yolk sac absorption feed with dry milk for 4-5 days and then introduced into fertilized earthen ponds (500 m2 and equipped to aerators) in intensive condition and fed with micro pellet food for 3-4 month. In finally, more than 1.8 millions fries of 1-2 g and some more than 5 g produced and released into Anzali lagoon to its restocking for first time. It is expected that continuing of restocking process of autumn form kutum by Iranian Fisheries Organization eventuate to population increasing of this form in Caspian Sea in future.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Artificial propagation ; Culture ; Rutilus frisii kutum ; Kutum ; Bony Fish ; Fishery ; Spawning ; Biodiversity ; Aquaculture ; Brooders ; Fecundity ; Male ; Female ; Population
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 79pp.
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