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  • 1
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    In:  http://aquaticcommons.org/id/eprint/25006 | 18721 | 2018-11-19 09:52:41 | 25006 | Khorramshahr University of Marine Science and Technology
    Publication Date: 2021-07-16
    Description: The aim of this study was to evaluate the effect of temperature changes to reduce toxicity of jellyfish Crambionellaorsini venom. Venom extraction was done according to Bloom method. Sonication was used to break the wall of nematocysts capsule and then the resulting solution was centrifuged. To evaluate the effect of temperature on the venom, it was heated at different temperatures and then injected into sori mice. After catching jellyfish, Crambionellaorsini from Arvand stream estuary edges of umbrellas and tentacles of jellyfish were separated and kept in water LD_50 of toxins were calculated by Jung and Choi method and statistical analysis to obtain minimal lethal dose of poison done by Excel 2007. The results showed that the venom of jellyfish Crambionellaorsini, like venom of other animals is, based on a protein and that is sensitive to heat. This venom is disabled and lose their structure at 48 °C and its minimum lethal dose is 0.5 ml.
    Keywords: Biology ; Iran ; Arvand ; Jellyfish ; Extracting venom ; Cnidarian ; C.fleckeri ; Toxicity ; Temperature ; Crambionella Orsini
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 143-166
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  • 2
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    In:  http://aquaticcommons.org/id/eprint/25921 | 18721 | 2018-11-22 07:16:39 | 25921 | Khorramshahr University of Marine Science and Technology
    Publication Date: 2021-07-16
    Description: In order to study concentration of polycyclic aromatic hydrocarbons in seawater from Bushehr coast and for comparison with available guidelines samples of seawater were collected from five different stations along the Bushehr coast in August and February 2011. PAHs were extracted by Hexane solvent and analyzed using HPLC system (Knauer). Results showed that tPAHs concentration in seawater were 31.0, 20.8, 4.0, 17.6 and 12.3 µg l-1, in August and 38.4, 23.0, 5.4, 19.3 and 17.2 µg l-1 in February respectively, at stations Rafael, Sheghab, Abshirinkon, Lian and Helyleh. The concentrations of tPAHs in the seawater were not significantly different during August and February (P〉0.05). Significant difference was observed between tPAHs concentration between the stations (P〈0.05). The tPAHs concentration was maximum in Rafael and its minimum was found in Abshirinkon. The tPAHs concentration in Bushehr area was relatively higher compared to other locations of the world. Even though concentrations of anthracene, phenanthrene, fluoranthene and pyrene were above the Canadian Environment Guidance, the carcinogenic compounds appeared in lower concentrations than the non-carcinogenic PAHs. Since Bushehr coastal waters is contaminated by PAHs, precise monitoring and control of oil discharge into the coastal waters as well as reduction of urban effluents input should be undertaken. Meanwhile the continuous monitoring of PAHs compounds in the area is recommended.
    Keywords: Pollution ; Iran ; Bushehr Port ; Concentration ; Polycyclic ; Hydrocarbon ; Coastal waters ; HPLC ; tPAHs
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 58-67
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