JOURNAL OF MARINE SCIENCES AND TECHNOLOGY
Year:2016 | Volume:14 | Issue:4|Papers Count:13

This investigation, which involved the satellite images together with simulation model, focuses on the effect of the sea hydrodynamics on coastal area classification. The study area is the North-West coasts of Gulf of Oman. Mike 21 was employed to simulate the hydrodynamics of the Oman Gulf and Aster images were used to classify the coastal area applying Shepard’s method. Coastal classification of the area proposed the secondary coasts cover just 7% of the area including the Sirik headland and Jask regions. Intrusion of land toward the sea for Sirik headland and existence of longshore current in the area are the main reasons. The Jask area is located in transition zone between deep water of Gulf of Oman and shallow water of Hormoz Strait and was influenced by marine affects.

Sharpnose mullet is an exotic species of Caspian Sea which was translocated from Black sea to Caspian Sea during 1930 to 1934. This species colonized successfully and now it is commercial species of Caspian Sea. There is no information at molecular level about this species after 8 decades of presence in Caspian Sea, therefore genetic structure of Sharpnose mullet (L. saliens) in two regions, Babolsar and Tonekabonof Mazandaran Province was investigated using 6 microsatellite loci. Results showed low allelic richness (Na=5) and high level of Heterozygosity (Ho=0.821). So genetic diversity of species this was very low relative to marine species. Also, genetic differentiation index between population was very low (0.032) due to natural migration and high gene flow (10.4) between these regions.

transit. Formulating an appropriate strategy in transit will improve the performance of this port through attracting more cargo. In this sudy, the weakness and strength (Internal Factors) as well as the threats and opportunities (External factors) of Anzali port are identified and evaluated through SWOT analysis.Analysing internal factor evaluation matrix shows that “entering ship to the port without delay” and ”the high rate of cargo handling” are major strengths in functional area of this port while “the lack of coordination among port and other organisations” as well as “ lack of Storage” are the most dominant weaknesses. Results for evaluating external factors indicate “increasing transit income” as the best opportunity and “sever competition in attracting cargo transit” as an important threat. Finally, QSPM technique is applied to evaluate the alternative strategies in this port.Comparing eight key selected strategies indicates that “attracting merchant”, “keeping the fixed customers” and “overhauling port facilities” have the highest priority respectively. In order to provide the total weighted scores in SWOT and the relative attractiveness of the QSPM, two separate Likert scale questioner forms are distributed among 16 experts of Anzali port.

According to the role of the growth hormone gene in the aquaculture, in this research cloning growth hormone coioides (Epinephelus coioides) was evaluated in vector pTZ57R / T. After PCR product purification by kit QIAquick Gel Extraction, growth hormone gene was integrated intopTZ57R / T vector. Constructed vector was transferred in E. coli strain DH5α competent cells. The white colonies was recombinant bacteria, from that that plasmid extraction was performed. Cloning obtained conformed using with direct PCR and sequencing methods. Growth hormone cDNA from E. coioide has an open reading frame of 615 nucleotides and 204 amino acids respectively. The calculated molecular weight and predicted of isoelectric point of the growth hormone protein were 014.23 kDa and 9.6 respectively. The results of this study showe that growth hormone gene in pTZ57R / T vector successfully had been cloned and can be used to growth hormone gene expression and protein production. The omparition of gene sequencing with growth hormone gene from E. coioides in the GenBank was showed similarity between them.

Measurement of blood parameters is a diagnostic method to determine disease or health in aquatic organisms that can change by numerous factors. In this study 30 spotted catsharks Chiloscyllium punctatum, with similar characteristics of both sexes were caught from the northern estuary, of Persian Gulf. Blood samples were collected and parameters such as WBC, lymphocytes, monocytes, eosinophils, neutrophils and blood indices including MCV, MCH, MCHC were measured. Results indicated no significant difference between the measured parameters and both sexes (p>0.05). The highest count of lymphocytes and the lowest count of eosinophils were seen in males. White blood cells were higher in male than in female. The highest MCV was seen in male and the lowest MCHC was seen in female with no significant difference in both sexes. Differences in WBC and blood parameters in cat spotted shark with other marine organisms are discussed.

Jacket-type offshore platforms play an important role in oil and gas industries in shallow and intermediate water depths such as Persian Gulf region. Such important structures need accurate considerations in analysis, design and assessment procedures. Incremental wave analysis for performance-based assessment of jacket platforms is established in 2011 to estimate different limit states and accurate behavior of jacket platform against environmental wave loading. IWA can be appropriate substitute to current pushover practice. The IWA can estimate the collapse-prevention limit state of jacket platforms properly. In addition, an appropriate parameter for ultimate capacity of offshore platforms is introduced which is called Collapse Wave Height (CWH). The CWH can be utilized as a substitute to RSR parameter in the design and assessment of jacket platforms. In this paper, IWA is explained. IWA curves, collapse-prevention limit state and CWH for case study platform is calculated. Effect of deck mass and its distribution on CWH is examined.

Atmospheric dust particles originating in the arid and semi arid regions of the world are known to be principal sources of mineral dust. The use of satellite remote sensing dust, the potential of this technique is created to provide valuable information to assist in the design of network measurement and estimation dust in marine environments. Dust deposited provides key nutrients such as iron to oceanic phytoplankton. Aerosol optical depth were reviewed in the study between March 2008 and December 2013 in the Persian Gulf. Aqua and Terra satellites for the MODIS sensor data as well as aerosol data (PM10) and Environmental stations and optical depth stations AERONET, used to evaluate the aerosol optical depth. The results showed that the data of MODIS AOD has acceptable accuracy and very high correlation between the values measured by MODIS and network AERONET, there (correlation coefficient:90.0). Comparison between AOD values derived from measurements by satellites Aqua and Terra MODIS sensor and the amount of aerosol (PM10) estimated environmental stations in the Persian Gulf region also took place. The results showed that between these two values correlated to the Aqua and Terra satellites in the study area, and the correlation coefficient was greater in summer than winter. The results of this study showed that the optical depth data from the MODIS satellite images can provide accurate information dusts the Persian Gulf.

In order to investigate the population structure species of sea cucumberHolothuria parva in the two regions Bostaneh Port and Dayer Port, 16S rRNA gene sequencing method was used. In total, 417 nucleotide loci were determined, after investigating in the NCBI database, sequences were consistent with 16S rRNA gene and samples were verified to belong to the speciesH. parva. In total four haplotypes were identified, one of which was common in both regions. Bostaneh Port had 3 haplotypes and Dayer Port had 2 haplotypes. Haplotype diversity was estimated to be 83 percent in Bostaneh Port and 50 percent in Dayer Port. Estimated Nucleotide diversity in Bostaneh and Dayer Ports were 0.007 and 0.002 respectively. Low genetic differentiation (Fst=0.000), divergences rate (Dxy=0.0048) and high gene flow (Nm=1874) between the two regions were estimated. Based on this study Bostaneh and Dayer Port samples have probably diverged from an identical population since a high gene flow and low differentiation is observed among them. There is also a common haplotype, suggesting a common ancestor ofH. parva in two regions.

Temperature is one of the fundamental parameters in physical oceanography and study of marine processes. The variation of spatial and local of Sea Surface Temperature (SST) plays an important role on climate change, life of fish, ocean currents, salinity and the other characteristics of seas and lakes. The purpose of this research was to predict SST in the Caspian Sea. The data on the Caspian Sea surface temperature that have been measured with Aqua satellite from MODIS sensor have been collected from 2003 to 2007. This data was analyzed by Fourier series method. Using Fourier analysis Fourier coefficients were calculated and temperature was predicted for future years. Average SST has been calculated for 24 selected stations in three different regions of Caspian Sea. The pattern of SST in different times for Caspian Sea during 2003-2007 was identified. The result of spectral time series showed that temperature variation in different times have a similar pattern. In all stations spectral frequency have a 12 month periodic pattern.

Hawksbill sea turtle (Eretmochelys imbricata) as endangered species on the southern coast of Iran, is facing numerous threats that significantly reduced this rare species. The purpose of this study was to investigate the behavior of Hawksbill hatchlings in artificial light. This study was done in the sandy protected beach in Kish Island, Persian Gulf. The effects of light on sea turtle hatchlings with two treatments were examined. The first treatment included flashing, directand horizontal light (represents the lights of the cars that cross from backshore road) and the second treatment included indirect, vertical light (similar to the street lights). Data of each treatment were compared by using paired T-test. The result of T-test in first treatment showed, significant difference between the number of sea turtle hatchlings deviated by flashing lights. However, in the second treatment there was no significant difference between the number of sea turtle hatchlings deviated by vertical lights. of the results showed that light from cars are more destructive than light from street lamps.

Yeasts, single-celled organisms in the intestinal flora of fish are useful due to their probiotic properties such as production of some antibiotics and vitamins. According to research, great population and species diversity of these unicellular yeasts can be anticipated in the intestine flora. In present study, along with study on species diversity of Saccharomyces genus as natural intestines flora of Rainbow trout, several new species similar to Saccharomyces genus were detected. Identification of the yeasts flora of rainbow trout by molecular techniques of PCR as well as diffraction media could characterize not only some strain of Saccharomyces genus but also a new genus of Kazachstania in cultured rainbow trout.