per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
1
8
article
Development of quality index method of Goldlined seabream Rhabdosargus sarba stored at refrigerator
Milad Ahmadi Shalhe
1
Ainaz Khodanazary
khodanazary@yahoo.com
2
Seyyed Mehdi Hosseini
3
M.Sc student of Khorramshahr University of Marine Science and Technology
Assistant professor, Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology
Assistant professor, Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology
Abstract
A quality index method scheme for Goldlined seabream Rhabdosargus sarba stored at refrigerator was developed and its efficiency for freshness evaluation was compared with colorimeter, microbial and physicochemical methods. The quality index method results indicated a shelf life of 9 days. Physicochemical (TVBN, pH, TBARS and FFA) microbiological (mesophilic, psychrophilic and Enterobacteriaceae) and sensory analysis were carried out at 0, 3, 6, 9 and 12 days of storage. Variations in TVBN, pH, TBARS and FFA were observed throughout the storage period. Sensory analysis attributes exhibited significant variations and correlations with time storage, which is a showing of the fish´ loss of freshness. QI showed a linear relationship to storage time (QIM= 8.23× storage time-7.23, R2= 0.988), and the shelf life of Goldlined seabream could be estimated with an accuracy of ± 3 days. A regression analysis using the acceptability limit mesophilic counts (7 log cfu/g) showed that shelf life for Goldlined seabream Rhabdosargus sarba stored at refrigerator was 9 days. TVBN, pH, TBARS, microbiology, color and sensory analysis displayed very strong correlations with storage time, and they may be considered suitable indicators for evaluating of shelf life of Goldlined seabream stored at refrigerator.
http://joc.inio.ac.ir/article-1-1523-en.pdf
Rhabdosargus sarba
Quality index method
Refrigerator.
per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
9
18
article
Histopathological assessment of Spleen in Pomadasys kaakan Cuvier, 1830 and Lutjanus johnii Bloch, 1792 in the Oman Sea
Parvin Sadeghi
Parvin.sadeghi@gmail.com
1
Omid Koohkan
omidkoohkan@gmail.com
2
Ameneh Moradi
amenh.moradi@yhoo.com
3
Assistant professor of marine biology, Chabahar Maritime University, Faculty of Marine Sciences
Instructor of marine biology, Chabahar Maritime University, Faculty of Marine Sciences
MSc student in marine biology, Chabahar Maritime University, Faculty of Marine Sciences
Abstract
The aim of this study was to investigate the histopathologic changes of spleen tissues as biomarkers for assessing the health of common Pomadasys kaakan and Lutjanus johnii. In this research, 9 pieces of Pomadasys kaakan with a mean length 35.54 ± 4.35 cm and a mean weight of 512.6 ± 58.5 grams and 9 pieces of Lutjanus johnii with an average length of 22.5 ± 3.41 cm and mean weight 205.6 ± 22 grams of Ramin, Haft Tir and Konarak stations were caught using by gillnet. In order to observe the severity of tissue lesions, spleen tissue was separated and fixed in Bouin's solution. The tissue samples were prepared for histological studies according to standard histology methods, dehydration, clarification, parafinization. Then they were prepared by microtome cutting device with transverse sections of 5 microns thickness. After staining with hematoxylin-eosin, it was examined by a light microscope equipped with a digital photographic Camera. Results showed lesions in the spleen tissue such as melanomacrophage aggregations, blood vessel dilatation, vacuolation, necrosis, cell density, white pulp, plasma cells dilution. Lowest lesions in the spleen tissue of Pomadasys kaakan and Lutjanus johnii were observed at Ramin and Konarak stations. In the other hand, the highest lesions in the spleen tissue of both fish were recorded at Hatf Tir station. Which can be explained by the close vicinity of the station and the proximity of two Shahid Kalantari and Shahid Beheshti docks and high levels traffic of flotation.
http://joc.inio.ac.ir/article-1-1524-en.pdf
Tissue lesions
Spleen
Biomarker
Chabahar Bay
per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
19
28
article
Experimental Investigation of Wave Height Changes on the Base Shear and Overturning Moment of the Jacket Subjected to Random Waves in Deep Waters
Arash Dalili Osgouei
arash_dalili@yahoo.com
1
Ramin Vafaei Poursorkhabi
raminvafaei@yahoo.com
2
Ahmad Maleki
maleki_civil@yahoo.com
3
Hamid Ahmadi
h-ahmadi@tabrizu.ac.ir
4
Ph.D. Candidate, Department of Civil Engineering, Maragheh Branch, Islamic Azad University, Maragheh, Iran
Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran
Department of Civil Engineering, Maragheh Branch, Islamic Azad University, Maragheh, Iran
Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran
Abstract
The purpose of this study is to obtain the base shear force and overturning moment of the jacket at the three wave heights of 20, 23 and 28 cm. In this regard, the model of the jacket structure is constructed at a height of 4.55 meters, 402 meters in length and 4 meters in depth of water, exposed to random waves of the sea and is subjected to the JONSWAP spectrum in the flume of Fars National Marine Laboratory (NIMALA). Based on the results obtained, in all examinations, deep water conditions prevail. Considering the effective wave, for the wave height decreases from 28 to 23 cm, 14.17%, 23 to 20 cm, 52.9%, 28 to 20 cm, 74.57%, reduction of the base shear; and for the decrease of wave height reduction from 28 to 23 cm, 33.79%, 23 to 20 cm, 17.06%, 28 to 20 cm, and 56.63%, overturning moment reduction were obvious.
http://joc.inio.ac.ir/article-1-1526-en.pdf
Jacket
Random Waves
Wave Height
Base Shear
Overturning Moment
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Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
29
38
article
Numerical Study on the Effects of Climate Change on Sea Surface Temperature in the Persian Gulf
Shirin Farkhani
s_farkhani@ut.ac.ir
1
Nasser Hadjizadeh Zaker
nhzaker@ut.ac.ir
2
Graduate Faculty of Environment, University of Tehran
Associate Professor, Graduate Faculty of Environment, University of Tehran,
Abstract
This paper presents the assessment of effect of climate change on surface temperature of the Persian Gulf, using MIKE three-dimensional numerical model. Parameters such as air temperature, relative humidity, wind speed components, precipitation rate and the sky transparency have been utilized for hydrodynamics simulation of the region. ECMWF data in the Persian Gulf for the period of (1980-2000) and downscaled CORDEX data in RCP 8.5 scenario for the period of (2080-2100), have been implemented to the model. The effect of the climate change on sea surface temperature was evaluated by studying the differences between the average patterns in years 1980-2000 and 2080-2100. The results demonstrate that surface temperature in future; will increase in all seasons. This increment becomes smaller towards the deeper parts of the region. Based on conducted numerical modeling results, it is predicted that the water temperature in future climate, will have the highest increment in summer with the value of 4.6 °C. Spring will have the lowest increment with the value of 3.5°C. It is also predicted that the average sea surface temperature in the Persian Gulf will increase about 4.1 °C in autumn and 3.8°C in winter.
http://joc.inio.ac.ir/article-1-1527-en.pdf
Climate change
Persian Gulf
Sea surface temperature
CORDEX
MIKE 3FM
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Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
39
44
article
Legal Structure of Biodiversity Conservation and Exploitation of the Area’s Marine Genetic Resources
Javad Salehi
Javadsalehi@pnu.ac.ir
1
Assistant Professor of Payam-e-Noor University, Tehran, Iran
Abstract:
Conservation and exploitation of the genetic resources of non-national maritime areas need to a legal structure that has not been foreseen at the time of the adoption of the Convention on the Law of the Sea. The Convention on Biological Diversity Considers Marine Genetic Resources in the Territory of States Parties, While the Convention on the Law of the Sea does not provide for the exploration of genetic resources of the Free Seas and the Area. This paper seeks to analyze the role of the Convention on Biological Diversity and the Convention on the Law of the Sea in shaping the future legal structure and exploiting deep sea genetic resources. The results of this research show that identification of genetic resources in the Convention on Biological Diversity from one side and identifying the common heritage of humankind beings in the Convention on the Law of the Sea, on the other hand, can be used to provide a model for the establishment and approval of a proposed biodiversity implement agreement in areas beyond national jurisdiction.
http://joc.inio.ac.ir/article-1-1528-en.pdf
Marine Genetic Resources
Area
Convention on Biological Diversity
Convention on the Law of the Sea
Common Heritage of Mankind
Freedom of High Sea.
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Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
45
54
article
Evaluation of Fertilization Indices and Stress Response of Rainbow Trout Oncorhynchus mykiss (Walbaum, 1792) in Different Temperatures
Mohammad Hossein Khanjani
m.h.khanjani@ujiroft.ac.ir
1
Gholamreza Ghaedi
ghaedighr@gmail.com
2
Assistant Professor, Department of Fisheries Science and Engineering, Faculty of Natural Resources, University of Jiroft, Jiroft, Iran
Graduated PhD in aquaculture, Fisheries Department, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology
Abstract
Temperature is one of the important factors influencing the growth and reproduction of aquatic animals. In this research, the effect of temperature on fertilization indices and stress response of rainbow trout was investigated. Two treatments of temperature, 14.5 and 17.2°C in three replications were considered. Rainbow trout eggs (average weight of 81.30 ± 1.91 mg) with a density of 5000 eggs were stocked per each trough and were exposed to different temperatures until hatching stage. According to the results, it was found that the duration of eyed and hatching stages was shortened with increasing the temperature, and also the percentage of hatching and active swimming decreased. The values of 32.66% and 30% were obtained for hatching and active larvae, respectively, at 17.2 °C, which showed significant difference with another treatment. Responses to the stress of temperature in the early stages of the egg were not noticeable, but the effect of stress on embryos grown at various temperatures caused differences in the response of cortisol to stress at the hatchery stage, which led to an increase in the cortisol level at hatching compared to eyed-stage. When the fish are exposed to stress in the embryonic period, the delayed response of cortisol to stress does not occur immediately after hatching. Finally, the results indicate that the hypothalamus-pituitary- Interrenal (HPI) axis is activated at the hatching stage and responds to environmental stresses (as temperature).
http://joc.inio.ac.ir/article-1-1529-en.pdf
Fertilization indices
cortisol
stress
embryo
Rainbow trout
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Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
55
63
article
Predicting the potential distribution of Avicennia marina across mangrove forest area in Southern Iran using Biochemical datase
Razieh Ghayoumi
r.ghayoumi@gmail.com
1
Elham Ebrahimi
el.ebrahimi@mail.sbu.ac.ir
2
Research group of Biodiversity and Biosafety, Research Center for Environment and Sustainable Development, RCESD, Department of Environment, Tehran, Islamic Republic of Iran
M.Sc degree in Environmental engineering, Environmental Sciences Research Institute, Shahid Beheshti University, Tehran, Ira
Abstract:
Distribution and ecological preferences of aquatic organisms have often not been studied. Species Distribution Modeling can improve our knowledge and enhance the ecosystem management and protection. This study conducted in 2017 with the objective of predicting the potential suitable habitat for Avicennia marina and the most important environmental factors influencing its distribution. Mangroves as the world's valuable habitats with high biomass and productivity, play an important role for fauna and flora both land and sea, providing shelter, nursing and feeding grounds. In this study, 9 biochemical variables from Bio-ORACLE database were compiled. The correlation coefficient between each pair of variables was calculated to identify highly correlated variables and reduce multicollinearity. Finally, the distribution model was produced with MaxEnt. Results show that suitable habitats for mangrove distribution have placed in the Eastern part of the Persian Gulf and the Oman Sea. Moreover, Chlorophyll-a minimum range, summaximum and pH were found to be the top variables affecting the distribution. Results can be used in a decision-making framework that helps conservation outcomes deliver as a result of managers’ strategy.
http://joc.inio.ac.ir/article-1-1530-en.pdf
Mangrove forests
Avicennia marina
Ocean dataset
Species Distribution Modeling
per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
65
74
article
Long-term Analysis of Sea Surface wind field over the Persian Gulf Basin, Using reanalysis data, NCDC-BSW and in situ observations during a 23-year period
Elaheh Owlad
e.owlad@inio.ac.ir
1
Hasan Khaleghi-Zavareh
hkzavareh@yahoo.com
2
Parviz Irannejad
piran@ut.ac.ir
3
Parvin Ghafarian
p.ghafarian@inio.ac.ir
4
Iranian National Institute for Oceanography and Atmospheric Sciences
University of Shahrekord
Institute of Geophysics, University of Tehran
Iranian National Institute for Oceanography and Atmospheric Sciences
Abstract
Sea surface wind speed and direction data with high spatial and temporal resolution is essential to having realistic perception and being able to forecast Air-Sea interaction. Lack of enough field measurements over the Persian Gulf has been always a serious issue in meteorological studies over this area. The object of this study is to determine the mean wind field over the Persian Gulf and find out the trend of the wind in this area. To do so, three data sets including: buoy and synoptic observed data, ERA-Interim reanalysis data and blending satellite retrieved data (from NCDC-BSW) are used for long-term analysis of surface wind field over the Persian Gulf. After a comparison of in-situ observation data with estimations performed by the reanalysis model and satellite data and verification of these datasets, wind fields were extracted using satellite and reanalysis data and the long-term wind trend was retrieved from 1988 to 2010 for 23 years. Results illustrate a relative increase in the wind speed estimated from reanalysis data and a relative decrease in the wind speed estimated from satellite data. Considering everything, it could be concluded that the satellite data has had better performance in estimating wind speed. So that, long-term investigation of the increase-decrease trend in wind speed at divergent stations indicate an effect of summer and winter Shamal on the maximum and minimum wind speed and regime, that were estimated in the Persian Gulf region. Considering this effect, the highest winds in winter occur near Bushehr area while the maximum winds in summer are seen in lower latitudes and near the center of the Persian Gulf.
http://joc.inio.ac.ir/article-1-1550-en.pdf
Wind field
reanalysis data
Satellite data
long-term
Persian Gulf
Shamal wind.
per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
75
84
article
parinaz.kazemi@modares.ac.ir
1
gholamalifard@gmail.com
2
msd@yahoo.com
3
http://joc.inio.ac.ir/article-1-1551-en.pdf
per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
85
95
article
Enhanced predictions of tides in the Persian Gulf through data assimilatio
Davood Shariatmadari
davood5a5@yahoo.com
1
Seyed Mostafa Siadatmousavi
siadatmousavi@iust.ac.ir
2
Cyrus Ershadi
cyrusershadi1@yahoo.co.uk
3
Hormozgan University
Iran University of Science and Technology, Tehran, Iran
Hormozgan University
Abstract
Hydrodynamic models are widely used for simulating water level and oceanic current; however due to uncertainties involved in this process such as accuracy of input data or realization of the governing equations, there are some errors in the simulation results. Data assimilation is one of the effective solutions to avoid and to limit some of these errors. This manuscript evaluates how Ensemble Kalman filter, one of the most advance assimilation techniques, can enhance water elevation predictions in the Persian Gulf. The open source Delft3D FM was used as a hydrodynamic model and open source code of Open DA was employed to apply Kalman Filter. The Open DA was coupled inside the code of hydrodynamic model to improve its performance. We have setup several experiments to estimate the best number of groups, error parameter of observations, error parameter of open boundary, and the most effective station for assimilation. The results show that the data assimilation can effectively improve the hydrodynamic model results and can be used for real applications.
http://joc.inio.ac.ir/article-1-1552-en.pdf
Data assimilation
Ensemble Kalman Filter
Delft3D-FM
Open DA
tide
Persian Gulf
per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
97
112
article
Investigating of Biological Health of Mangrove Forest in Nayband Bay Using Macrobenthic Communities
esmat salimi
e_salimi@yahoo.com
1
nasrin sakhaee
nsakhaee@yahoo.com
2
mohsen nurinezhad
M.noorinezhad@gmail.com
3
ahmad savari
savare32@yahoo.com
4
sadroddin ghaemmaghami
s_sadra2003@yahoo.com
5
Khorramshahr university of marine science and technology
Shrimp research center
Khorramshahr university of marine science and technology
Khorramshahr university of marine science and technology
Khorramshahr university of marine science and technology
Abstract
The purpose of this study is to survey the ecological health of mangrove forest in Nayband bay by Shannon diversity index and determine the environmental factors effective in distribution of macrobenthic. 6 transects along coasts of Nayband bay were sampled for macrobenthos identification and enumeration. In each transect 3 stations were selected in perpendicular line to the beach. Physicochemical parameters such as Temperature, Salinity, Turbidity, Phosphate, Nitrate, Chlorophyll etc. were measured in addition to sediment grain size and TOM. Totally 60 macrobenthos species identified. Gastropods and Bivalves in Mollusca phylum were the dominant group with the contribution 48% of total macrobenthos population. Pirenella cingulata and Protapes gallus were the dominant species in Gastropods and Bivalves respectively. Maximum average total numbers of benthos were 5361.56 and 5584.78 individual/m2 in winter and summer respectively and minimum average number was 1957.56 individual/m2 in spring. Parametric statistical tests showed significant difference between number and frequency of species in different seasons and station (p<0.05). CCA analysis showed that salinity, turbidity and TOM are an effective factors in distribution of crustacean and bivalves. Phosphate, silt & clay and chlorophyll a have positive impact and sand present and temperature have negative impact on distribution of Gastropods. Temperature is important factor on density of polychaetes. Shannon diversity index showed that the studied area is moderate in terms of biological health.
http://joc.inio.ac.ir/article-1-1293-en.pdf
Nayband bay
Mangrove forest
Macrobenthos
CCA
Physico-chemical factors
per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
113
122
article
mmbeigi@inio.ac.ir
1
mkazeminezhad@inio.ac.ir
2
yeganeh@iust.ac.ir
3
http://joc.inio.ac.ir/article-1-1549-en.pdf
per
Iranian National Institute for Oceanography and Atmospheric Science
Journal of Oceanography
1562-1057
2476-6755
2020-01
10
40
123
134
article
Investigation the Distribution of Copper, Iron, and Lead Compounds in Surface Sediments of Musa Estuary by Sequential Extraction
Saman Absiah
s.absiah@gmail.com
1
Kamal Ghanemi
kamal.ghanemi@kmsu.ac.ir
2
Yadollah Nikpour
nikpour1342@yahoo.com
3
Department of Marine Chemistry, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, P.O. BOX 669, Khorramshahr, Iran
Department of Marine Chemistry, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, P.O. BOX 669, Khorramshahr, Iran
Department of Marine Chemistry, Faculty of Marine Science, Khorramshahr University of Marine Science and Technology, P.O. BOX 669, Khorramshahr, Iran
Abstract
Determination of total amount of sediment metals can be used as a measure of pollution in the area, but it alone cannot show the mobility potential, toxicity, and availability of various metal compounds in the sediment. In this research, a five-stage sequential extraction process was used to extract various compounds of iron, copper and lead from sediments. Eighteen samples were collected from different stations in Musa estuary, Persian Gulf, including Majidiyeh, Ghazaleh, Ja'fari, Musa, Merimous, and Ghanam. After drying and homogenization, 1.0 g of each sediment was extracted with the help of selective reagents within a given temperature and time. After each extraction, the specimen was exposed to subsequent extractions to complete all five steps. The amount of metals ions in separated solutions were measured by an atomic absorption instrument. The results showed that most of the metals were in the reducible oxides and residual sections. The highest amount of copper compounds in the exchangeable portion was related to Majidiyeh (5.3%), and for the lead was related to Ja'fari (19.6%). Therefore, it can be said that the mobility potential of copper and lead ions in Majidiyeh and Ja'fari stations, which are under the influence of industrial and urban activities, is higher than the rest. Comparison of the average distribution of copper and lead compounds in the sediments of Musa estuary with the rest of the world showed that although the distribution pattern of metal compounds is quite similar, the amount of these compounds in sediments is significantly less than the other compared regions.
http://joc.inio.ac.ir/article-1-1554-en.pdf
Fractionation studies
heavy metals
sediments
Musa estuary