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  • 1
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    Response of sediment-dwelling annelida community in relation to geochemical parameters in the Gorgan Bay, Caspian Sea (2014)
    Springer
    Details
    Publication Date: 2014-08-26
    Print ISSN: 1735-1472
    Electronic ISSN: 1735-2630
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Springer
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  • 2
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    Antioxidant properties of sodium acetate, sodium citrate and sodium lactate on lipid oxidation in rainbow trout (Onchorhynchus mykiss) sticks during refrigerated storage (4˚C) (2018)
    Details
    Publication Date: 2021-05-19
    Description: This study was carried out to investigate the rate of lipid oxidation in fresh rainbow trout (Onchorhynchus mykiss) and in the sticks treated by (2.5% w/v) sodium acetate (NaA), sodium citrate (NaC) and sodium lactate (NaL). The pH value, free fatty acid (FFA), thiobarbituric acid (TBA) and sensory evaluation (odor, flavor and color) were determined on 0, 3, 6, 9 and 12 days of storage. The results showed that TBA and FFA in control were significantly higher than those in the other groups (P〈0.05). Sticks immersed in NaA indicated a significant difference in formation of free fatty acids in comparison with other sodium salt-treated samples on 9 and 12 days after storage. Sticks dipped in NaL had a maximum level of pH at the end of the storage, whereas samples treated by NaA achieved significantly the lowest value of pH, 9 days after storage. Organoleptic assessments of the samples expressed more acceptability of sticks immersed in sodium salt solutions than the control after 3 days of storage. These indicated that sodium salts, particularly sodium acetate, have antioxidant properties.
    Description: Published
    Keywords: Onchorhynchus mykiss ; Rainbow trout ; Antioxidant ; Sodium salt ; Lipid oxidation ; Refrigerated storage
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.73-86
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  • 3
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    Daphnia pulex through physical and chemical factors (2017)
    Details
    Publication Date: 2021-05-19
    Description: Regarding the key role and importance of Daphnia in aquaculture, particularly for survival and adaptation of fishes in larval stages, a comprehensive study on hatching rate of Daphnia ephippial eggs was implemented to obtain an optimum technique. The effects of abiotic factors was investigated on the hatching response of Daphnia pulex diapausing eggs collected from live food ponds in Cultivation and Breeding Centre of Gorgan. After isolation, the eggs were kept in dry and wet conditions at 4°C for 2 months in darkness. Following the preincubation period, the eggs in each group were subdivided into 2 parts and treated with 1% NaOCl and distilled water. The effect of temperature levels (15 C, 20 C, 25 C) and photoperiod levels (12L: 12D, 24L: 0D) were identified on the hatching of eggs in AdaM medium during 15 days. Results indicated that the exposure of wet-kept eggs to 12-hour photoperiod and 25 C without soaking in 1% NaOCl, caused the maximum rate and speed of hatching.
    Description: Published
    Keywords: Daphnia pulex ; Physical ; Chemical ; Aquaculture ; Feed ; Live food ; Eggs ; Survival
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.67-76
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  • 4
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    Prevalence of helminth parasites in digestive tract of Persian sturgeon (Acipenser persicus) broodstocks southeast of the Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: We collected 100 specimens of Persian sturgeon brood stocks propagated in Shahid Marjani Fish Culture Center to study internal parasites during March, April, and May 2005. The center is located in the southeast of the Caspian Sea. Three different parasite species were recovered from digestive tract (stomach and intestine) of the fish. Cucullanus sphaerocephalus, Skrjabinopsolus semiarmatus showed the highest incidence and highest mean intensity (with prevalence of 80% and 55% respectively) but Leptorhynchoides plagicephalus had the lower prevalene 2 %. The prevalence of S. semiarmatus and C. sphaerocephalus were higher in males than in females whereas the intensity of these parasites were higher in females than in males. Statistical analysis of data showed a significant relationship between the occurrence of S. semiarmatus and the sex of the fish. There was a significant relationship between the occurrence of C. sphaerocephalus and the length of the fish (P 6 0.05). Forty nine percent of the fish had less than 10 worms. It was also found that the internal parasites of A. persicus in the southeast of the Caspian Sea are the same as those found in the southwest but the diversity of parasites were fewer in the former.
    Description: Published
    Keywords: Intestines ; Anadromous species ; Brood stocks ; Digestive system ; Stomach ; Skrjabinopsolus semiarmatus ; Acipenser ; Acipenser persicus ; Leptorhynchoides plagicephalus ; Cucullanus sphaerocephalus ; Brackish ; Parasites ; Species diversity ; Length ; Fish Culture ; Sex
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.55-64
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  • 5
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    Daphnia pulex through physical and chemical factors (2021)
    In:  http://aquaticcommons.org/id/eprint/21808 | 18721 | 2018-01-08 09:21:33 | 21808 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-02
    Description: Regarding the key role and importance of Daphnia in aquaculture, particularly for survival and adaptation of fishes in larval stages, a comprehensive study on hatching rate of Daphnia ephippial eggs was implemented to obtain an optimum technique. The effects of abiotic factors was investigated on the hatching response of Daphnia pulex diapausing eggs collected from live food ponds in Cultivation and Breeding Centre of Gorgan. After isolation, the eggs were kept in dry and wet conditions at 4°C for 2 months in darkness. Following the preincubation period, the eggs in each group were subdivided into 2 parts and treated with 1% NaOCl and distilled water. The effect of temperature levels (15 C, 20 C, 25 C) and photoperiod levels (12L: 12D, 24L: 0D) were identified on the hatching of eggs in AdaM medium during 15 days. Results indicated that the exposure of wet-kept eggs to 12-hour photoperiod and 25 C without soaking in 1% NaOCl, caused the maximum rate and speed of hatching.
    Keywords: Aquaculture ; Biology ; Chemistry ; Aquaculture ; Feed ; Live food ; Daphnia pulex ; Iran ; physical ; chemical
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 67-76
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  • 6
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    Prevalence of helminth parasites in digestive tract of Persian sturgeon (Acipenser persicus) broodstocks southeast of the Caspian Sea (2021)
    In:  http://aquaticcommons.org/id/eprint/23661 | 18721 | 2018-07-15 08:50:17 | 23661 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-14
    Description: We collected 100 specimens of Persian sturgeon brood stocks propagated in Shahid Marjani Fish Culture Center to study internal parasites during March, April and May 2005. The center is located in the southeast of the Caspian Sea. Three different parasite species were recovered from digestive tract (stomach and intestine) of the fish. Cucullanus sphaerocephalus, Skrjabinopsolus semiarmatus showed the highest incidence and highest mean intensity (with prevalence of 80% and 55% respectively) but Leptorhynchoides plagicephalus had the lower prevalene 2 %. The prevalence of S. semiarmatus and C. sphaerocephalus were higher in males than in females whereas the intensity of these parasites was higher in females than in males. Statistical analysis of data showed a significant relationship between the occurrence of S. semiarmatus and the sex of the fish. There was a significant relationship between the occurrence of C. sphaerocephalus and the length of the fish (P 6 0.05). Forty nine percent of the fish had less than 10 worms. It was also found that the internal parasites of A. persicus in the southeast of the Caspian Sea are the same as those found in the southwest but the diversity of parasites were fewer in the former.
    Keywords: Fisheries ; Health ; Parasites ; Species diversity ; Length ; Fish Culture ; Sex ; Intestines ; Anadromous species ; Brood stocks ; Digestive system ; Stomach ; Skrjabinopsolus semiarmatus ; Acipenser ; Acipenser persicus ; Leptorhynchoides plagicephalus ; Cucullanus sphaerocephalus ; Brackish ; Caspian Sea ; Caspian Sea Eurasia ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 55-64
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  • 7
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    Antioxidant properties of sodium acetate, sodium citrate and sodium lactate on lipid oxidation in rainbow trout (Onchorhynchus mykiss) sticks during refrigerated storage (4˚C) (2021)
    In:  http://aquaticcommons.org/id/eprint/22356 | 18721 | 2018-03-27 17:56:04 | 22356 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-03
    Description: This study was carried out to investigate the rate of lipid oxidation in fresh rainbow trout (Onchorhynchus mykiss) and in the sticks treated by (2.5% w/v) sodium acetate (NaA), sodium citrate (NaC) and sodium lactate (NaL). The pH value, free fatty acid (FFA), thiobarbituric acid (TBA) and sensory evaluation (odor, flavor and color) were determined on 0, 3, 6, 9 and 12 days of storage. The results showed that TBA and FFA in control were significantly higher than those in the other groups (P〈0.05). Sticks immersed in NaA indicated a significant difference in formation of free fatty acids in comparison with other sodium salt-treated samples on 9 and 12 days after storage. Sticks dipped in NaL had a maximum level of pH at the end of the storage, whereas samples treated by NaA achieved significantly the lowest value of pH, 9 days after storage. Organoleptic assessments of the samples expressed more acceptability of sticks immersed in sodium salt solutions than the control after 3 days of storage. These indicated that sodium salts, particularly sodium acetate, have antioxidant properties.
    Description: Article includes abstract in Farsi on last page.
    Keywords: Chemistry ; Fisheries ; Rainbow trout ; Antioxidant ; Sodium salt ; Lipid oxidation ; Refrigerated storage ; Onchorhynchus mykiss ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 73-86
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