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  • Temperature  (7)
  • Bacteria  (6)
  • Ecology
  • 11
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    Molecular identification of bacterial and fungal pathogens in certain disease-free shrimp (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25746 | 18721 | 2018-10-13 06:11:23 | 25746 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: At present, the aquaculture industry to provide proper instructions in the field of health management, including production of Specific Pathogen Free shrimp (SPF), require sensitive and reliable methods for the detection and identification of pathogenic microorganisms. Molecular methods which used in the detection of microorganisms have a high discriminatory power in the taxonomy and in relation to libraries in the world. On the other hand, the accurate identification of microorganisms, providing the genetic data bank of shrimp pathogens and maintenance of these strains is the step to promote further research on the mechanisms of pathogenesis of pathogens, diagnosis, treatment, prevention of disease, identify indigenous production kits, diagnosis re emerging and emerging diseases and their origin. Therefore, in this project, by using ribotyping technique, native isolated pathogenic bacteria and fungi were identified and recorded in the gene bank database center. During sampling of shrimp and water of Specific Pathogen Free shrimp center, 40 bacterial strains were isolated, which 8 of them had the most frequency and identification based on 16S rDNA sequencing was performed. Bacteria identified are: Vibrio nigripulchritudo strain IS013(GenBank:KP843725), Vibrio brasiliensis strain IS014 (GenBank:KR186076), Vibrio rotiferianus strain IS015 (GenBank:KR186077), Vibrio azureus strain IS012 (GenBank:KJ018724.1), Vibrio owensii strain IS016 (GenBank:KR186078), Agarivorans gilvus strain IS017 (GenBank:KR186079), Vibrio brasiliensis IS018 (GenBank:KR186080) and Vibrio alginolyticus strain IS019 (GenBank:1817854), which were recorded in The World Bank genes. In this study fungal isolates were not detected.
    Keywords: Biology ; Iran ; Bacteria ; Fungi ; Ribotyping ; 16S rDNA ; Shrimp ; Specific pathogen free ; Vibrio rotiferianus ; Vibrio owensii ; Vibrio brasiliensis ; Vibrio azureus ; Agarivorans gilvus ; Vibrio alginolyticus ; GenBank
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 64
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  • 12
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    Investigating the effects of physico-chemical properties of water on growth and survival rate of the cultured Penaeus semisulcatus (2021)
    In:  http://aquaticcommons.org/id/eprint/24261 | 18721 | 2018-08-04 06:08:19 | 24261 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Studying the likely relationships between biotic and abiotic factors and their effects on growth and survival of the cultured aquatics is one of the most important fishery research areas. In this study, we used three Penaeus semisulcatus culture ponds, each with 0.4 hectares surface area and a stocking rate of 25 shrimps per square meter in Bushehr Province of Iran to examine the effects of physico-chemical properties of water on growth and survival rate of the shrimp. The average body weight of the shrimp reached as high as 10.59 grams and with an estimated food conversion ratio of 1.3, a mean yield of 1954 kg/ha was recorded in this study. The independent variables including water temperature, pH, planktonic bloom, salinity, nitrate and phosphate, water depth, dissolved oxygen and food consumption had all significant correlations with the shrimp weight as dependent variable. The planktonic bloom showed the highest correlation with the shrimp weight (r=0.8.7). The overall correlation of first four most important factors with the shrimp weight, namely planktonic bloom, morning dissolved oxygen, pH stability and feeding rate was estimated to be r=0.939.
    Keywords: Aquaculture ; Ecology ; Growth ; Penaeus semisulcatus ; Bushehr Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 13-22
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  • 13
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    Investigating the effects of physico-chemical properties of water on growth and survival rate of the cultured Penaeus semisulcatus (2018)
    Details
    Publication Date: 2021-05-19
    Description: Studying the likely relationships between biotic and abiotic factors and their effects on growth and survival of the cultured aquatics is one of the most important fishery research areas. In this study, we used three Penaeus semisulcatus culture ponds, each with 0.4 hectares surface area and a stocking rate of 25 shrimps per square meter in Bushehr Province of Iran to examine the effects of physico-chemical properties of water on growth and survival rate of the shrimp. The average body weight of the shrimp reached as high as 10.59 grams and with an estimated food conversion ratio of 1.3, a mean yield of 1954 kg/ha was recorded in this study. The independent variables including water temperature, pH, planktonic bloom, salinity, nitrate and phosphate, water depth, dissolved oxygen and food consumption had all significant correlations with the shrimp weight as dependent variable. The planktonic bloom showed the highest correlation with the shrimp weight (r=0.807). The overall correlation of first four most important factors with the shrimp weight, namely planktonic bloom, morning dissolved oxygen, pH stability arid feeding rate was estimated to be r=0.939
    Description: Published
    Keywords: Physico-chemical ; Survival rate ; Penaeus semisulcatus ; Growth ; Biotic ; Abiotic ; Aquatic ; Fishery ; Temperature ; pH ; Planktonic bloom ; Salinity ; Nitrate ; Phosphate ; Dissolved oxygen
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.13-22
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