2024-03-28T18:16:26+04:30
http://joc.inio.ac.ir/browse.php?mag_id=29&slc_lang=fa&sid=1
29-1098
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Population Structure Analysis of Large Head Hairtail (Trichiurus lepturus) Using Morphological Methods and Microsatellite in the Persian Gulf and Oman Sea
Esfandiari
Ehsan
Mohammad Ali
Salari Aliabadi
Nasrin
Sakhaei
n.sakhaie@kmsu.ac.ir
Touraj
Valinasab
Javad
Hoseini
Large head hair tail lives in warm waters around the world and around the Persian Gulf and Oman Sea. In this study, 310 samples from four populations of this species in the waters of Chabahar, East and West of Strait of Hormuz and waters of Bushehr were collected using trawl fishing method. The morphological and microsatellite analysis were performed on the samples. Morphological analysis based on the similarity of populations and individuals were studied using SPSS v.20 and Primer v.5 software. The average number of alleles per population was 7.00, the number of alleles per locus was 3-15 with an average of 7.17 and the observed and expected heterozygosis average were 0.32 and 0.75 respectively. Among the 7 studies microsatellite loci, 6 microsatellite loci had deviation from Hardy-Weinberg equilibrium. The highest value of Fst based on AMOVA between the population of large head hair tail in the west of Strait of Hormuz and in the Cabahar waters was 0.145 and the lowest value of Fst between the population of large head hair tail in the Bushehr waters and in the Chabahar waters was 0.095.
Large head hair tail
Morphology
Microsatellite
Population structure
Persian Gulf and Oman Sea.
2017
3
01
1
7
http://joc.inio.ac.ir/article-1-1098-en.pdf
10.18869/acadpub.joc.8.29.1
29-1099
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Effect of Organic and Carbonate Content on Liquid and Plastic Limits of Seabed Soils in the Northern Persian Gulf
Hadi
Gerivani
gerivani@inio.ac.ir
Abdolmajid
Naderi Bani
amnaderi@inio.ac.ir
Majid
Pourkerman
pourkerman@inio.ac.ir
Sedigheh
Amjadi
Type and rate of clay minerals are responsible for soil plasticity, but there are other parameters like carbonate and organic contents which can affect plasticity of soils. In this study, for assessing the effect of carbonate and organic contents on liquid and plastic limits in seabed sediments of northern Persian Gulf, laboratory tests were done and the results were compared to each other. Based on the test results, zoning maps of liquid limit, plastic limit, carbonate content and organic content for the study area were presented. The results showed that by increasing the carbonate content, the liquid and plastic limits and plastic index were decreased. Also, it was shown that the organic content had positive correlation with Atterberg limits and index.
Carbonate
Organic content
Atterberg limits
Persian Gulf.
2017
3
01
9
15
http://joc.inio.ac.ir/article-1-1099-en.pdf
10.18869/acadpub.joc.8.29.9
29-1100
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
The Study of SST Optimization Using Nudging Scheme in Data Assimilation Method (Case Study: the Persian Gulf)
Mahmud Reza
Abbasi
phys.ocean.abbasi@gmail.comphys.ocean.abbasi@gmail.com
Vahid
Chegini
Masoud
Sadrinasab
Seyed Mostafa
Siadatmousavi
In this paper, we investigated the capabilities of SST data assimilation methods into FVCOM model using nudging scheme. In Data assimilation, observational data was combined with the numerical model in order to get the optimum model. This process was achieved by correcting the model errors for two purposes: first to optimize the desired variable and second to present the optimized initial condition for model. The studying domain was the Persian Gulf during 1998-2003. The model was run in two stages with the same setup: without and with assimilation method. To assess the impact of data assimilation, the model results in both runs were compared with valued OISST data in spatial distribution and temporal evaluation. The statistical parameter values were improved by using data assimilation. The surface temperatures of shallow parts were optimized specially near the Strait of Hormuz.
Data assimilation
Nudging
SST
OISST
FVCOM
Persian Gulf.
2017
3
01
17
24
http://joc.inio.ac.ir/article-1-1100-en.pdf
10.18869/acadpub.joc.8.29.17
29-1101
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Strategic Programming of Coastal Tourism (Case study: Nowshahr)
Roxana
Moogouei
r_moogoui@iau-tnb.ac.ir
Sepideh
Hosseini
Reza
Almozafar
Iran has about 800 km of shoreline bordering the Caspian Sea that provides nice tourism attractions for this coastal area. In this study, we attempted to formulate strategies for sustainable tourism management. The survey consisted of three parts. The first part explained the main aspects within government agencies relevant to tourism. In this part, we identified the variables that the chosen tourist destination considered critical for strategy formulation. In the two other sections, major aspects within tourism planning were considered based on tourists and resident's opinions. For strategic programming, SWOT, QSPM and principal component methods were used. All factors were evaluated by internal and external evaluation matrices. Final scores for each factor were calculated as 2.43 and 2.15 respectively. Finally, strategies were extracted and quantified through Quantitative Strategic Programming Matrix. Revision of laws and regulation gained the highest attractiveness score as 3.180. Moreover, these variables were analyzed using principle component method. Consequently, two main components were described; the first: "People based development of coastal hygiene and services" and the second: "Governmental based development of transportation systems".
Strategic programming
Tourism
Coast
Nowshahr.
2017
3
01
25
33
http://joc.inio.ac.ir/article-1-1101-en.pdf
10.18869/acadpub.joc.8.29.25
29-1102
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Study of Feeding Regime of Sea Cucumber Stichopus herrmanni Using Nutritional Indices on Coral Reefs of Southeast of the Qeshm Island, Persian Gulf
Fariba
Fanati Rashidi
Ehsan
Kamrani
Mohammad
Sharif Ranjbar
This study aimed to investigate the sea cucumber Stichopus herrmanni diet in coral reef located southeast of the Qeshm Island and other nutritional indices. Sampling was done seasonally (10-15 samples in each season) in southeast of Qeshm Island (area around 515000 m2) and intestinal contents were examined as a standard method. In this study, Diatoms, blue green algae, Micro benthic animals (foraminifers, nematodes and gastropod) as main prey were detected in the intestinal contents in this species. During different seasons, changes observed in the index of fullness and vacuity index of intestine and RLG Index was over one. In general, it seems that the diet changes happening in this beast is affected by different stages of life including sexual maturation and spawning.
Sea cucumber
Feeding regime
Coral reefs
Stichopus herrmanni
Persian Gulf
2017
3
01
35
41
http://joc.inio.ac.ir/article-1-1102-en.pdf
10.18869/acadpub.joc.8.29.35
29-1103
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Investigating Abundance, Distribution and Accumulation of Plastic Resin Pellets and Fragments in the Caspian Sea: A Case Study of Noor Shores
Mohammad
Masoudnik
Alireza
Riyahi Bakhtiari
riahi@modares.ac.ir
Mahdi
Abdollahi
This study was an attempt to investigate abundance, distribution and accumulation of plastic resin pellets and fragments in the Caspian Sea on the basis of color, size and shape. Therefore, using National Oceanographic and Atmospheric Association (NOAA) method, the plastic debris samples were collected from two separate stations with eighteen quadrats and in a range of two kilometers. The results of study showed that microplastics (whose size is less than 5 millimeter) were more abundant than meso and macro plastics. Also, it was found that plastic resin pellets (N=4263) were the most frequent microplastics. In addition, color analysis of the samples showed that white resin pellets and fragments have the highest frequency. In sum, it was found that plastic debris and fragment are widely and unevenly distributed along shore lines of the Caspian Sea. It seems that this phenomenon is the result of some factors such as characteristics of the Caspian Sea, climate change, vicinity to land mass and land sources, marine activities, geomorphology of the region and physical factors such as shape, size and density of debris rather than human activities.
Plastic debris
Resin pellet
Fragment
Caspian Sea
2017
3
01
43
53
http://joc.inio.ac.ir/article-1-1103-en.pdf
10.18869/acadpub.joc.8.29.43
29-1104
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Developing a Predicting Model for Initial Oil Droplet Size Distribution due to a Subsea Oil Release
Seyed Hamzeh
Mirkhalili
mirkhalili.phd@gmail.com
Said
Mazaheri
Regarding the important role of droplet size distribution for determination of time, location and trajectory of oil droplets in subsea oil and gas releases, in this research a model for prediction of oil droplet size distribution was presented. This paper dealed with the theoretical basis for the model first and then the model specifications were presented. The model parameters were used based on available experimental data. Effects of gas void fraction and buoyancy were also discussed. Using this research model, oil specific diameter can be calculated and then based on Rosin-Rammler (k=0.693, α=1.8) or Lognormal (S=0.78) distributions, oil droplet size distribution was determined. Surfacing time, location and trajectory of oil droplets can be calculated based on oil spill models. This research results can be extended to full scale oil and gas release conditions given good agreement between this research results and experimental data (Deep Spill).
Droplet size distribution
Subsea oil and gas releases
Gas void fraction and buoyancy
2017
3
01
55
63
http://joc.inio.ac.ir/article-1-1104-en.pdf
10.18869/acadpub.joc.8.29.55
29-1105
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Investigation of Diversity and Distribution of Phytoplankton Cysts in the Recent Sediments of the Western Chabahar Coasts
Gilan
Attaran-Fariman
gilan.attaran@gmail.com
Mehri
Hashemzai
Chakavak
Khajeh Amiri Khaledi
In this paper, the diversity and distribution of phytoplankton cysts in the recent sediments of the western Chabahar Coasts were investigated. The sampling from cysts was done from 27 stations three times in summer and fall 2014. This sampling was done using Grab Ekman (225×225 cm). Physiochemical analysis of water was done by standard methods. According to the results of this research, 72 species belonged to 22 genera of Dinoflagellates were found. Scrippsiella and Protoperodinium with the most abundance were the prevailing species. Although, Scrippsiella, which was observed in most stations in both sampling seasons, is not a poisonous species, it has the capacity to produce harmful blooms. In general, the results of this study showed that the cysts frequency in different seasons has a significant difference and sediment type as a significant factor influences their abundance, so that smaller seed sediments are more abundant.
Cyst
Dinoflagellates
Sediments
Species variety
Distribution
Western Chabahar Coasts.
2017
3
01
65
74
http://joc.inio.ac.ir/article-1-1105-en.pdf
10.18869/acadpub.joc.8.29.65
29-1108
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Study of Biodiversity of Macrobenthos in Shadegan Wetland in Spring and Summer 2015 with Emphasis on Dominant Species
Parisa
Daei Nejad
sam1_derakhshan@yahoo.com
Mojgan
Khodadadi
mjkhodadadi@gmail.com
Ebrahim
Rajab Zadeh
The aim of present study was examining the effects of changing seasons (spring and summer) on macrobenthos of Shadegan Wetland. The study was conducted in 2015 in seven stations along the wetland. To investigate the role of environmental factors on macrobenthic community changes, pH, temperature, EC, amount of dissolved oxygen and salinity were measured by portable HQ40d. Sediment sampling for identifying macrobenthos, the percentage of organic matter and sediment grain size analysis were done by Van Veen Grab Sampler with cross section of 0.025m2. The result of measuring physical and chemical factors showed a meaningful non-difference between the spring and summer seasons, but showed a difference in the number per square meter and the identified macrobenthos between the two seasons. The abundance was higher in spring. In spring, 48520 ind. 21 m2 from 6 macrobenthos classes were counted that the highest abundance were Gastropod (91.34 %), Oligochaeta (3.79 %), Polychaete (2.39 %), insects (1.73 %), Bivalves (0.65 %), and crustaceans (0.082 %). In summer, 48520 ind. 21 m2 from 6 macrobenthos classes were counted that the highest abundance were Gastropod (95.28 %), Bivalves (2.53 %), crustaceans (1.86 %), Oligochaeta (0.103 %), Polychaete (0.103 %), insects (0.103 %). In the study, the change of seasons has no significant effect on studied parameters such as temperature. In conclusion, the factors, except seasonal factors, affect the benthos abundance in spring and summer.
Macrobenthos
Biodiversity
Physicochemical parameters
Shadegan Wetland
2017
3
01
75
85
http://joc.inio.ac.ir/article-1-1108-en.pdf
10.18869/acadpub.joc.8.29.75
29-1107
2024-03-28
10.1002
Journal of Oceanography
1562-1057
2476-6755
doi
2017
8
29
Investigation of the Effect of Monsoon on Diversity and Density of Macrobenthos in Iranian Coast of Makran Sea (Oman Sea)
Keivan
Ejlali Khanghah
Gholamali
Akbarzadeh
gholamaliakbarzadeh@gmail.com
Shohreh
Rashidi
Seyed Ali
Mousavi
Sediment sampling for investigation of the effect of environmental factors on abundance and diversity of benthic community was carried out in Makran (Oman Sea) coast in pre and post monsoon with a 0.1m2 Van Veen Grab and CTD in 2007 and 2009. Polychaeta, Crustacea, Gastropoda and Bivalvia were the dominant groups of benthic community respectively either in pre or post monsoon. There was a significant difference between abundance in pre and post-monsoon (P<0.05). Pearson correlation was significantly different between abundance with depth (P<0.01) and DO and temperature (P<0.05). Shanoon and margalof indices changed increasingly from west to east of Makran (Oman Sea) coast but there was no significant correlation between diversity indices and environmental factors. The results showed that abundance of macrobenthos community in post-monsoon was more than pre-monsoon because of the Monsoon Sea current and the increase of chlorophyll-a in post-monsoon.
Macrobenthos
Chlorophyll-a
Diversity
Makran Sea
2017
3
01
87
101
http://joc.inio.ac.ir/article-1-1107-en.pdf
10.18869/acadpub.joc.8.29.87