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  • 1
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    Introducing a bioelectrochemical method for highly selective enumeration of magnetotactic bacteria (2020)
    Springer Nature
    Details
    Publication Date: 2020-05-22
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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    PAPER CURRENT
  • 2
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    Monitoring of fisheries resources in artificial reefs in east of Kish Island waters (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Artificial reefs are manmade materials deployed under water in order to improve invironment and increase the exploaitation of fishing area. Usage of artificial technic has developed due to increase of world pupolation and need to supply of protein, aim to restoring of natural spicialy rehabilitation of demersal fishes. It has effecte to increase the production in order sustainable exploitation. Coasts and Islands have destruction due to over harvesting from ecosystems and other activities by humans and natural, These caused many aquatic as demersal fishes has endangered in Persian Gulf and Oman Sea. The artificial reef is one way or method that can improve the environment and restore the aquatic. Iranian fisheries has established an artificial reefs area in west of Kish Island. This area has studied during one year, Data of assembeled fishes and physical sampling were collected in seasonal during spring, summer, autumn and winterd. Ther were tow tritment for sampling as artificial reefs site and a control site. Collected data has analyzed and evaluated by SPSS and Exel. The results showed that there was significant difference between the sites and assembled fishes in artificial reefs were more than control site. Consequently the artificial reefs can be a tool and technic to improve the marine environment and increase the production of fishes, especially the demersal fishes.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Coastal Development ; Fish Production ; Marine ; Artificial reefs ; Fisheries ; Population ; Environment ; Demersal fishes
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 72pp.
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  • 3
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    Study on effects of physical , biological and chemical parameters on growth and bloom-forming of dinoflagellates Cochlodinium polykrikoides (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The red tide, as a natural phenomenon, has been frequently occurred in the Persian Gulf and Oman Sea coastal waters. Harmful algal blooms of Cochlodinium polykricoiedes were first observed in August 2007 and coincided with massive aquatic organisms’ mortalities and have caused substantial economic losses and negative effects on the aquatic environment in the Persian Gulf. The objective of this study was to evaluate direct control or mitigation of C. polykricoiedes blooms through physical (flocculation with clay; 0.5, 1.0, 1.5, 2, 4 and 10 g L-1), biological [6 seaweeds; fresh and extract (aqueous and methanol)] and chemical (hydrogen peroxide, potassium permanganate, copper sulfate, acetic acid and sodium hypochlorite; 0.05, 0.1, 0.5,1 and 1.5 g L-1) treatments. The results of the physical assay showed that the growth of C. polykricoiedes was strongly inhibited by using clay slurry in 4 or 10 g L-1. The removal efficiency of C. polykricoiedes by clay was 99% after 24 hour. The seaweeds showed the most mitigation effect on C. polykricoiedes using aqueous extract was C. sinnosa, using mixed aqueous and methanol were S. illicifolium , U. lactuca and G. corticata, fresh tissue were E.intistialis ، C.sinuosa , H.valentiea , and culture filtrate of E. intistialis. The results clearly showed that the flocculants; potassium permanganate, copper sulfate, acetic acid and sodium hypochlorite had the highest removal efficiency (100%) of C. polykricoiedes cells in the lowest concentration (0.05 g L-1). Overall, our experiments suggest that using clay and seaweeds as a control strategies could be considered for HABs in the Persian Gulf coastal waters.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Physical ; Biological ; Chemical ; Harmful algal bloom ; Cochlodinium polykrikoides ; Isolation ; Optimum growth parameters ; Growth ; Mortality ; C. polykricoiedes ; C. sinnosa ; S. illicifolium ; U. lactuca ; G. corticata ; E.intistialis ; C.sinuosa ; H.valentiea
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 109pp.
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  • 4
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    Determination of effective parameters on growth and bloom forming of‌Cochlodinium polykrikoides (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Although the most alga blooms usually provide positive impacts on marine ecosystems, but blooming of certain species of algae may also have negative impacts which evidence suggests that over the past few decades the frequency and duration of Harmful Algal Blooms (HABs) have been increasing both nationally and worldwide. Harmful algal blooms of Cochlodinium polykrikoides in the Persian Gulf and Oman Sea were first observed in 2008. In order to provide optimum growth and bloom forming, C. polykrikoides cells were sampled during the bloom conditions in the coastal waters of Bandar Abbass, Qeshm and Hourmoz Islands from March 2012 to June 2015. After sampling, the samples transferred to Persian Gulf and Oman Sea Ecological Research Institute phytoplankton Lab and adapted to filtered seawater. In Phycolab, they isolated and purified by positive phototropism characteristic of species to light. They were grown in modified media culture at different salinities (30, 32 and 35ppt), temperatures (20, 23, 26 and 28ºC) and intensities (35, 70 and 90 µmol m-2s-1). During this study 3 Dinoflagellates species were identified in Hormozgan Coastal waters. The first species was Noctiluca scintillans. This species was alive in F/4 media culture and under the 32ppt salinity, 25°C temperature, and an 11h light: 13h dark photoperiod regime only for 4 months. The second species was Protoperidinium quinquecorne and produced temporal blooms that could not be isolated under usual and modified media cultures. The last Dinoflagellates species that caused spreading blooms in Hormozgan Coastal waters and could be possible to isolate was Cochlodinium polykrikoides. The results clearly showed that the best media culture for growth of this species is A2 and the highest alga biomass was obtained following culture under the 32ppt salinity, 26°C temperature, and under an 11h light: 13h dark photoperiod regime at a light intensity of 90 µmol m-2s-1 provided by cool white fluorescent tubes. Maximum cell density of C. polykrikoides in a 5 liter Erlenmeyer for 12 days reached to 1.6 × 106 cell L−1 with 2-12 and occasionally to 16 cells chain. Based on the results from the present study, providing suitable media culture and physical condition, bloom forming of C. polykrikoides start from day 8 and will be continued until day 24.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Harmful algal bloom ; Isolation ; Dinoflagellates ; Growth ; Cochlodinium polykrikoides
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 50pp.
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  • 5
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    Determination of effective parameters on growth and bloom forming of Cochlodinium polykrikoides (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25834 | 18721 | 2018-10-13 10:51:04 | 25834 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Although the most alga blooms usually provide positive impacts on marine ecosystems, but blooming of certain species of algae may also have negative impacts which evidence suggests that over the past few decades the frequency and duration of Harmful Algal Blooms (HABs) have been increasing both nationally and worldwide. Harmful algal blooms of Cochlodinium polykrikoides in the Persian Gulf and Oman Sea were first observed in 2008. In order to provide optimum growth and bloom forming, C. polykrikoides cells were sampled during the bloom conditions in the coastal waters of Bandar Abbass, Qeshm and Hourmoz Islands from March 2012 to June 2015. After sampling, the samples transferred to Persian Gulf and Oman Sea Ecological Research Institute phytoplankton Lab and adapted to filtered seawater. In Phycolab, they isolated and purified by positive phototropism characteristic of species to light. They were grown in modified media culture at different salinities (30, 32 and 35ppt), temperatures (20, 23, 26 and 28ºC) and intensities (35, 70 and 90 µmol m^-2s^-1). During this study 3 Dinoflagellates species were identified in Hormozgan Coastal waters. The first species was Noctiluca scintillans. This species was alive in F/4 media culture and under the 32ppt salinity, 25°C temperature, and an 11h light: 13h dark photoperiod regime only for 4 months. The second species was Protoperidinium quinquecorne and produced temporal blooms that could not be isolated under usual and modified media cultures. The last Dinoflagellates species that caused spreading blooms in Hormozgan Coastal waters and could be possible to isolate was Cochlodinium polykrikoides. The results clearly showed that the best media culture for growth of this species is A2 and the highest alga biomass was obtained following culture under the 32ppt salinity, 26°C temperature, and under an 11h light: 13h dark photoperiod regime at a light intensity of 90 µmol m^-2s^-1 provided by cool white fluorescent tubes. Maximum cell density of C. polykrikoides in a 5 liter Erlenmeyer for 12 days reached to 1.6 × 106 cell L^−1 with 2-12 and occasionally to 16 cells chain. Based on the results from the present study, providing suitable media culture and physical condition, bloom forming of C. polykrikoides start from day 8 and will be continued until day 24.
    Keywords: Aquaculture ; Health ; Iran ; Persian Gulf ; Harmful algal bloom ; Isolation ; Dinoflagellates ; Growth ; Cochlodinium polykrikoides
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 50
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  • 6
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    Study on effects of physical, biological and chemical parameters on growth and bloom-forming of dinoflagellates Cochlodinium polykrikoides (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25453 | 18721 | 2018-09-26 09:41:13 | 25453 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The red tide, as a natural phenomenon, has been frequently occurred in the Persian Gulf and Oman Sea coastal waters. Harmful algal blooms of Cochlodinium polykricoiedes were first observed in August 2007 and coincided with massive aquatic organisms’ mortalities and have caused substantial economic losses and negative effects on the aquatic environment in the Persian Gulf. The objective of this study was to evaluate direct control or mitigation of C. polykricoiedes blooms through physical (flocculation with clay; 0.5, 1.0, 1.5, 2, 4 and 10 g L^-1), biological [6 seaweeds; fresh and extract (aqueous and methanol)] and chemical (hydrogen peroxide, potassium permanganate, copper sulfate, acetic acid and sodium hypochlorite; 0.05, 0.1, 0.5, 1 and 1.5 g L^-1) treatments. The results of the physical assay showed that the growth of C. polykricoiedes was strongly inhibited by using clay slurry in 4 or 10 g L^-1. The removal efficiency of C. polykricoiedes by clay was 99% after 24 hour. The seaweeds showed the most mitigation effect on C. polykricoiedes using aqueous extract was C. sinnosa, using mixed aqueous and methanol were S. illicifolium , U. lactuca and G. corticata, fresh tissue were E.intistialis، C.sinuosa, H.valentiea, and culture filtrate of E. intistialis. The results clearly showed that the flocculants; potassium permanganate, copper sulfate, acetic acid and sodium hypochlorite had the highest removal efficiency (100%) of C. polykricoiedes cells in the lowest concentration (0.05 g L^-1). Overall, our experiments suggest that using clay and seaweeds as a control strategies could be considered for HABs in the Persian Gulf coastal waters.
    Keywords: Ecology ; Iran ; Persian Gulf ; Oman Sea ; Harmful algal bloom ; Cochlodinium polykrikoides ; Isolation ; Optimum growth parameters ; Growth ; Mortality ; C. polykricoiedes ; C. sinnosa ; S. illicifolium ; U. lactuca ; G. corticata ; E.intistialis ; C.sinuosa ; H.valentiea
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 109
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  • 7
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    Monitoring of fisheries resources in artificial reefs in east of Kish Island waters (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25561 | 18721 | 2018-10-06 16:10:16 | 25561 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Artificial reefs are manmade materials deployed under water in order to improve environment and increase the exploitation of fishing area. Usage of artificial technic has developed due to increase of world population and need to supply of protein, aim to restoring of natural specially rehabilitation of demersal fishes. It has effected to increase the production in order sustainable exploitation. Coasts and Islands have destruction due to over harvesting from ecosystems and other activities by humans and natural, these caused many aquatic as demersal fishes has endangered in Persian Gulf and Oman Sea. The artificial reef is one way or method that can improve the environment and restore the aquatic. Iranian fisheries has established an artificial reefs area in west of Kish Island. This area has studied during one year, Data of assembled fishes and physical sampling were collected in seasonal during spring, summer, autumn and wintered. There were tow treatment for sampling as artificial reefs site and a control site. Collected data has analyzed and evaluated by SPSS and Exel. The results showed that there was significant difference between the sites and assembled fishes in artificial reefs were more than control site. Consequently the artificial reefs can be a tool and technic to improve the marine environment and increase the production of fishes, especially the demersal fishes.
    Keywords: Ecology ; Iran ; Persian Gulf ; Kish Island ; Coastal Development ; Fish Production ; Marine ; Artificial reefs ; Fisheries ; Population ; Environment ; Demersal fishes
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 72
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