Jafari S.A.,Persian Gulf University |
Cheraghi S.,Persian Gulf University |
Mirbakhsh M.,Iran Shrimp Research Center |
Mirza R.,Persian Gulf University |
And 2 more authors.
Clean - Soil, Air, Water | Year: 2015
Three bacterial species of PG01, PG02, and PG03 were isolated from coastal sediments of Bushehr (Iran) as mercury-resistant bacteria. According to 16S ribosomal DNA gene sequence, the strains were identified as Vibrio natriegens, Vibrio parahaemolyticus, and Oceanimonas baumannii, respectively. Minimum inhibitory concentration test in the presence of HgCl2 revealed that the strain PG02 was the most resistant one, which tolerated up to 45mgL-1 Hg2+. Tracing the growth curves for the PG02 showed that when it is initially exposed to 5mgL-1 Hg2+ in the medium, only 10% of its natural growth is reduced, while it simultaneously succeeds to remove 90% of mercury. However, initially 10mgL-1 Hg2+ in the medium led to 30% growth inhibition and 80% mercury removal. According to a linear relationship between the growth inhibition percentage and the initial mercury concentrations, the median effective concentration was calculated as 21.84mgL-1 for PG02. Central composite design under response surface methodology well proposed a model with high values of R2=0.999 and adjusted R2=0.998 which predicted the maximum mercury removal of 89.47% by PG02 under optimum pH of 7.2, temperature of 37.5°C and the initial mercury concentration of 5mgL-1. Vibrio parahaemolyticus was identified as a mercury-resistant bacterial strain in coastal sediments of Bushehr (Persian Gulf, Iran). This strain was used for the purpose of mercury removal from aqueous solution. As a result, >89% of initial mercury was removed by this strain under optimum conditions of pH 7.2, 37.5°C, and initial concentration of 5mgL-1, respectively. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 43 1 January 2015 10.1002/clen.201300616 Research Article Research Articles © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Ziaei-Nejad S.,Behbahan Khatam Alanbia University of Technology |
Salehi L.M.,Behbahan Khatam Alanbia University of Technology |
Ghaednia B.,Iran Shrimp Research Center |
Johari S.A.,University of Kurdistan |
Aberomand A.,Behbahan Khatam Alanbia University of Technology
AACL Bioflux | Year: 2015
Aquaculture industry especially shrimp farming in Iran and other parts of the world has been facing various disease that among various agents, pathogenic bacteria has emerged as important because it causes large economic losses to the shrimp farming industry. This study investigated the antagonistic properties of copper nanoparticles (34 mg/L), probiotic Bacillus subtilis (108 CFU/mL), and combination of these two against with pathogenic bacteria, luminescent Vibrio harveyi in vitro condition in order to investigate possible use of probiotic B. subtilis and copper nanoparticles in the diet for growth and immunity enhancement in Litopenaeus vannamei. This study reports that in Well diffusion test and Disc diffusion test against pathogenic bacteria luminescent V. harveyi maximum inhibition showed by combination of suspension of probiotic B. subtilis and copper nanoparticles the amount of (W = 22.54±1.72 and D = 16.37±2.9) whereas minimum inhibition was copper nanoparticles the amount of (W & D = 0). Results indicated the possible synchronic use of probiotic B. subtilis and copper nanoparticles in shrimp diet. © 2015, BIOFLUX SRL. All rights resereved.
Braulik G.T.,University of St. Andrews |
Ranjbar S.,Iran University of Science and Technology |
Owfi F.,Iranian Fisheries Research Organisation |
Aminrad T.,Offshore Fisheries Research Center |
And 3 more authors.
Journal of Cetacean Research and Management | Year: 2010
Iran has 1, 700km of coastline that borders the Persian Gulf and the Arabian Sea in the northwest Indian Ocean. Apart from a handful of records, almost nothing is known about which marine mammal species occur in Iranian waters. This review was conducted to fill this information gap. A total of 127 marine mammal records of 14 species were compiled from Iranian coastal waters. Ninety-nine were from the Persian Gulf, 26 from the Gulf of Oman and 2 were of unknown location. Records of finless porpoise (Neophocaena phocaenoides) (25), Indo-Pacific humpback dolphin (Sousa chinensis) (24) and Indo-Pacific bottlenose dolphin (Tursiops aduncus) (22) were by far the most numerous, a probable reflection of their inshore distribution and local abundance. Other species recorded were long-beaked common dolphin (Delphinus capensis tropicalis), roughtoothed dolphin (Steno bredanensis), striped dolphin (Stenella coeruleoalba), spinner dolphin (Stenella longirostris), Risso's dolphin (Grampus griseus), false killer whale (Pseudorca crassidens), sperm whale (Physeter macrocephalus) and dugong (Dugong dugon). Records of 26 mysticetes were compiled, 10 of which were tentatively identified as Bryde's whales (Balaenoptera edeni), 1 possible fin whale (Balaenoptera physalus), 3 humpback whales (Megaptera novaeangliae) and the remainder were not identified to species. The largest threat to small cetaceans in Iran is likely to be incidental capture in fishing gear. Nine finless porpoises were recorded as bycatch and this and other coastal species may be declining due to unsustainable mortality rates. Some of the world's busiest shipping lanes pass through Iranian waters and ship strikes are likely to be the largest threat to mysticetes in the area.
Parisa H.K.,Iran Shrimp Research Center |
Javad T.,Persian Gulf University
International Food Research Journal | Year: 2011
In this study, bioaccumulation of lead, copper, cadmium, zinc and mercury in gill, liver and muscle of Acanthopagrus latus (Yellowfin seabream) was quantified. The concentrations of heavy metals were determined by using differential pulse anodic stripping voltammetry (DPASV) after wet digestion method. The result comprise of concentration level of Cu2+, Cd2+, Zn2+, Pb2+ and Hg2+ in ten different samples of fish. Cu2+ and Zn2+ concentrations show that there is no significant variation with weight and length, but Cd2+, Pb2+ and Hg2+ concentration increases gradually as weight and length increases. Concentrations of metals in gill, liver and muscle were significantly different (p< 0.05). Muscle, generally, accumulated the lowest levels of metals and highest levels of metal concentrations were observed in the liver and gills. These results suggest that higher accumulation of heavy metals in liver and gills can be good environmental indicators of metal stress in Acanthopagrus latus. © 2011.
Raeisi H.,Gorgan University of Agricultural Sciences and Natural Resources |
Daliri M.,Gorgan University of Agricultural Sciences and Natural Resources |
Paighambari S.Y.,Gorgan University of Agricultural Sciences and Natural Resources |
Shabani M.J.,Iran Shrimp Research Center |
And 2 more authors.
African Journal of Biotechnology | Year: 2011
The aim of this study was to record the length-weight relationship parameters and condition factors for some commercially important fish of Bushehr coastal waters of Persian Gulf. The length-weight relationships were calculated for five species caught during fishing surveys using different types of fishing gears (trawls, pots and gill net with different mesh size) during April 2008 to December 2010. The b value ranged between 2.733 for Argyrops spinifer and 3.03 for Epinephelus coioides. The coefficient of determination (r 2) was very significant for all the species. Relative weight had significant differences (Kruskal-Wallis test, P<0.001) with best performance by E. coioides. This results show that this range size of specimens in these populations apparently do not reach and surpass 100% of mean weight. In this study, length-weight relationships and condition factors are reported for the first time for A. spinifer, Pomadasys kaakan and Lutjanus malabaricus from the Persian Gulf and for Lethrinus nebulosus and Lutjanus malabaricus ruber which has not been previously recorded in the Iranian waters. © 2011 Academic Journals.