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dc.contributor.authorNasrollahzadeh Saravi, Hassan
dc.contributor.authorVahedi, F.
dc.contributor.authorLaloei, F.
dc.contributor.authorUlomi, Y.
dc.contributor.authorNasrollahtabar, A.
dc.contributor.authorMakhlough, A.
dc.contributor.authorEbrahimzadeh, M.
dc.contributor.authorRazeghiyan, Gh.R.
dc.coverage.spatialIranen_US
dc.coverage.spatialCaspian Seaen_US
dc.coverage.spatialGoharbaranen_US
dc.date.accessioned2018-08-08T10:51:18Z
dc.date.available2018-08-08T10:51:18Z
dc.date.issued2018
dc.identifier.urihttp://hdl.handle.net/1834/13867
dc.description.abstractThe aim of this project is to study water quality and the trophic status at different months and depths in the southeast Caspian Sea-Goharbaran based on environmental parameters and nutrients during 2013-2014 in order the feasibility of fish cage culture. Results showed that water temperature, transparency, pH, dissolved oxygen, BOD5, COD, total alkaninity and TSS were varied 9.00-29.00C, 0.50-12.00 m, 8.05-8.74, 5.76-12.85, 14-101, 21-195 and 0.00-0.12 mg/l at the different months and depths, respectively. In addition, The values of NH4+, NH3, NO2-, NO3- and PO4-3 were 0.007-0.051, 0.001-0.010, 0.002-0.015, 0.043-0.477 and 0.014-0.077 mg/l, respectively. Chl-a concentration was recorded as 0.060-8.02 mg/l. Sacled and unscaled trophic indices were equal to 3.42-5.52 and 2.61-5.85, respectively. The proper temperature for cultivation of salmonids species in this area began from October to March. The range of the standard of pH and dissolved oxygen level for fish farming cage were 7.80-8.50 and >5 mg /l that in current study results of pH and dissolved oxygen which were consistent in the current study. Various forms of nitrogen (ammonium, nitrite and nitrate ) at the different layers were acceptable and less than the threshold limit of Australia and New Zealand. The results of the nutrients concentrations compared with data from the reference years (1996-1996 ) in the Caspian Sea (Goharbaran region) showed that this ecosystem passed from oligotrophic status and shifted to mezotrophic and eutrophic condition. As a conclusion, although nutrients concentrations were acceptable in terms of fish farming cages in this region, some parameters such as chemical oxygen demand and transparency are not suitable for aquaculture industry. Meanwhile, based on various trophic levels, this ecosystem (Gohrabaran region) has a mezotrophic status with a high risk of eutrophication.en_US
dc.description.sponsorshipIranian Fisheries Science Research Instituteen_US
dc.language.isofaen_US
dc.publisherIranian Fisheries Science Research Instituteen_US
dc.relation.ispartofseries52819;
dc.titleEutrophication trend of southeast Caspian Sea water (Mazandaran-Goharbaran) based on Environmental and biotic parameters using single and multiple variables in order to feasibility of Marine Cage Culturen_US
dc.typeReporten_US
dc.description.statusPublisheden_US
dc.format.pages44pp.en_US
dc.publisher.placeTehran, Iranen_US
dc.subject.asfaPhysico-chemical parametersen_US
dc.subject.asfaWateren_US
dc.subject.asfaFish cage cultureen_US
dc.subject.asfaTemperatureen_US
dc.subject.asfaTransparencyen_US
dc.subject.asfapHen_US
dc.subject.asfaDissolved oxygenen_US
dc.type.refereedRefereeden_US
refterms.dateFOA2021-01-30T18:48:33Z


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