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  • 1
    Publication Date: 2021-05-19
    Description: The purpose of this study was to evaluate Total petroleum hydrocarbons (TPHs) in surface sediments of Khamir, Laft, and Yekshabeh and Tiab esturies. For this purpose, sampling of surface sediments was carried out at 16 stations (four stations at each estury.In each sample, four points were taken from the beginning, the middle, the end and the junction point to the sea.The physicochemical properties of sediment such as grain size and total organic matter (TOM) were measured using standard methods. The concentration of total petroleum hydrocarbons was determined using Ultraviolet Fluorescence (UVF). Petroleum hydrocarbons showed limited variations from 53.11 to 2052.5 ng/g dry weight in the summer season and from 128.5 to.4392.5 ng/g in winter. The average detected concentrations for total hydrocarbons were lower than the environmental hazard (4000 ng/g). Most of their concentrations were observed at Yekshabeh estury in winter, possibly due to the pollution caused by the activity of ports and fishing vessels. Also, the assessment of environmental hazard caused by pollution of hydrocarbons for aquatic organisms by using SQSs and contamination coefficient (Cf) showed that the studied sediments except station 1 at Yekhshabeh estury in winter season (Cf = 0.91) has no adverse biological effects on aquatic organisms. Finally, the results of statistical analysis of the data showed that the physicochemical parameters of sediments (grain size and total organic matter (TOM)) and the total petroleum hydrocarbons were not correlated, which could indicate the existence of different sources for each studied parameters.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Survey ; Petroleum pollutants ; Shrimp
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 58pp.
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  • 2
    Publication Date: 2021-05-19
    Description: In order to study the ecological status of western and estern estuary of of Hormozgan, sampling of sediments in four stations in each estuary was carried out seasonally from spring to winter of 2016. In this study, 118 species of polychaets, 71 species 0f crustacea, 25 species of bivalves and 20 species of gastropods were introduced. The average density of macrobenthos population in indicated that the station 2 in Laft with 1522, station 1 in Khoran with an average of 3397 and station 4 of Yekshabe and Tiab with a mean of 980 and 1577 inm-2 respectively were the most densely populated. In laft, Margalef index, with the values of 7.44 in station 2, Shannon with 2.68 in Station 3, Pielo-Evenes with 0.77 in station 3, Simpson index with 0.43 in station 4 and w- Statistic with a value of 0.3 at station 3, In khooran Margalef index with a value of 43.4 at station 2, Shannon with a value of 2.78 at station 2, pielo-Evenes with a value of 0.66 at station 2, Simpson index with a value of 0.61 at station 1 and index w -statistic with a value of 0.1 at station two, In Yekshabeh, Margalef index with 8.83 in station 4, Shannon with a value of 3.68 at station 4, Pylou-Evenes with a value of 0.88 at station 4, Simpson index with a value of 0.11 at station 3 and w- Statistic with a value of 0.24 at stations two and four, and im Tiab, the Margalf index with a value of 10.46 at station 4, Shannon with a value of 3.47 at station 4, Pylou-Evenes with a value of 0.83 at station 2, Simpson index with a value of 0.17 at station 1 and index w -statistic with the value of 0.29 at station 4 were the highest in this survey. Totaly, these quantitative and qualitative indices based on weight ABC for Laft and Khoran discribed relatively contaminated and for Yekshabe and Tiab discribed non-contaminated condition In sum, these quantitative and qualitative indices based on ABC weight for leachate and dough conditions were relatively contaminated and for one and the other cobbins, non-contaminated conditions, due to which can be adjacent to the West Bank with the Persian Gulf, low depth and limited water exchanges, and as a result , the accumulation of materials from pllutands in thisestuaries and their impact onbenthic communities.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Estuaries ; Macrob enthos ; Index ; Biodiversity ; Population ; Fishery
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 66pp.
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  • 3
    Publication Date: 2021-05-19
    Description: Heavy metals are among the pollutants found in urban and industrial wastewater. Various industries, such as the metal, oil and petrochemical activities are among the main sources of heavy metals discharging into the marine environment. Hormozgan province, especially Bandar Abbas City, showed significant growth in chemical industry and high urbanization rates in recent years, which could have a significant potential for heavy metals entering the coastal ecosystem. The present study aims to monitor the concentration of heavy metals (including Fe, Cu, Pb, Cd, Ni, Co) in sediments collected from East and West of Hormozgan province and assessing the status of pollutants by comparison with regional and international standards. In this research, shrimp habitats were selected on the basis of Tib, Yekshabeh, Laft and Khamir. In order to investigate heavy metals in shrimp habitats of Hormozgan province, the study was conducted seasonally from autumn 1394 to summer of 1395. Copper, Nickel, and Cobalt metals were measured by flame atomic absorption and other metals using a furnace atomic absorption device. The results of Iron measurement in sediments of sampling stations showed that maximum concentration was 1.576 mg/kg in winter at Tiab estuary, while in summer this amount was related to Khamir estuary and reached to 1.578 mg/kg. In both summer and winter, copper had the highest amount of copper in the Tiab estuary with amount of 0.377 mg / g and 0.358 mg / g, respectively. The maximum observed concentration of Nickel in Tiab estuary is 0.114 mg / kg in summer. This amount was 0.069 mg / kg for cadmium in winter in Tiab estuary sediments. Lead and Cobalt metal exhibited their maximum concentration at the same time and place with0. 403 mg / kg and 0.247 mg / kg, respectively. In general, based on the findings of this study, the average concentration of heavy metals in the surface sediments from Hormozgan estuaries was recorded as Fe〉 Pb〉 Cu〉 Co〉 Ni〉 Ca. The assessment of the environmental quality of the sediments for all heavy metals showed that the measured values were lower than the guidelines and none of the metals was evaluated at poluuting level. In order to protect mangrove ecosystem and control the amount of heavy metal pollution, periodic monitoring of these metals in sediments of the study area is recommended.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Heavy metals ; Sediments ; Estuaries ; Coastal ecosystem
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 39pp.
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