2024-03-29T07:15:00+04:30 http://joc.inio.ac.ir/browse.php?mag_id=24&slc_lang=fa&sid=1
24-871 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Study on Wave Characteristics Based on Field Data Analysis: A Case Study of Jask Hamid Reza Asgari Ahmad Shanehsazzadeh a.shanehsazzadeh@eng.ui.ac.ir Gholam Hossein Akbari Hossein Ardalan Analysis and interpretation of field data independently or together with the numerical simulations determine the general characteristics of oceanography parameters in an interested study area. In this context, the general pattern of waves, its origin and the seasonal composition and the statistical distribution of the annual and seasonal wave height, period and direction are of outmost importance, by which, the crucial information for managerial purposes, coastal engineering plans and construction of onshore and offshore structures. In this article, the one year data of wave field nearby the Jask port at Northern Gulf of Oman are processed, analyzed and interpreted. The results were compared with ISWM numerical modeling results. Based on the results, the maximum observed significant wave height and the wave peak period were respectively 2.51 meters and 17 seconds. The dominant wave direction is the southeast with 45% occurrence. The interpretation of the general pattern of the waves on the East Coast of Hormozgan based on measured data including the percentages of seas and swell is of the advantages of this research. Wave field data Jask port Processing and data analysis ISWM. 2016 1 01 1 11 http://joc.inio.ac.ir/article-1-871-en.pdf
24-872 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Considering the Economic Potential of Antarctica and the Situation of Iran Shima Madani sh.madani@inio.ac.ir Saeedeh Khaleghi Antarctica is a vast land larger than Europe. Advancement of knowledge is the most important reason for presence of different countries in this region. Due to Iran;#39s long-term vision, achieving scientific first place in the region, special attention to this continent is essential. Except for scientific purposes, other economic benefits followed by many countries in Antarctica, including fisheries, melting iceberg for fresh water supply, tourism development and exploitation of the region;#39s mineral resources. These benefits, along with the development of science and technology should be done concerning environmental conservation. Based on the experience of other countries in this continent, different levels of resource exploitation can be considered in Antarctica, some of them achieved by presence in the region and for others, additional investment is needed. For this purpose, we have used the economic comparative advantage index. The results of this study showed that being in Antarctica for Iran is economically justifiable thorough Research and Development (R&D) on oceanographic sciences. As a result, Iran should invest on research areas for long run to have better understanding of this region. Economic Value of Antarctica Research and Development Comparative Advantage Index Iran. 2016 1 01 13 21 http://joc.inio.ac.ir/article-1-872-en.pdf
24-873 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Numerical Simulation of Tsunami Waves Forces on Coastal Structures Mohammad Ali Lotfollahi-Yaghin lotfollahi@tabrizu.ac.ir Hossein Nassiraei The main aim of the present paper is numerical investigation of the tsunami wave forces on coastal structures using the commercial software FLOW-3D. Verifications of the simulation results using experimental data and empirical formula showed that the present numerical model is capable of modeling the aforesaid problem with good accuracy. Several numerical simulations have been conducted in the framework of this work to study different parameters affecting the forces induced by tsunami waves on coastal structures. Four empirical equations have been introduced to estimate nonbreaking tsunami wave forces on coastal structures. Based on our results, quantity of exerted forces by breaking waves over curved structures and gradient structures with 45 degree was 20 and 35 percent of exerted forces over caisson structures, respectively. Coastal structures Tsunami Solitary waves Seawall Wave forces Numerical simulations Flow-3D. 2016 1 01 23 30 http://joc.inio.ac.ir/article-1-873-en.pdf
24-874 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Study on the Effect of Culture Media on Cell Density and Specific Growth Rate of Scenedesmus obliquus Sima Fayazi Behrouz Zarei Darki zareidarki@modares.ac.ir Jafar Seyfabadi The present study provides information of the effect of three culture media, viz. Tamiya, Trenkenshu and Guillard (f/2) on specific growth rate and cell density in alga Scenedesmus obliquus Kützing. The alga was isolated from the south cost of the Caspian Sea (the beach of Noor Town) and then it was purified and cultured in three media with three replications for each. Cell count was daily conducted with three replications by a hemocytometer and growth curves were plotted by excel. After calculating the specific growth rate, the one-way ANOVA was used to compare obtained values. The results of the present study showed that the highest density of cells (17×106 cell per mile liter) was in Trenkenshu culture medium, and the lowest density of cells (7×106 cell per mile liter) was in Guillard medium. Green algae Scenedesmus obliquus Specific growth rate Cell density Caspian Sea. 2016 1 01 31 38 http://joc.inio.ac.ir/article-1-874-en.pdf
24-875 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Act on the Marine Areas of Iran in the Persian Gulf and the Oman Sea (1993) and the LOS Convention: Balancing Adaptabilities and Insufficiencies in the Light of Current LOS Developments S. Zia E Madani z.madani@inio.ac.ir I.R. Iran in not a State party to the UNCOLS, yet the Act on the Marine Areas of Iran in the Persian Gulf and the Oman Sea (1993) (hereinafter called “the Act”) has been so largely inspired thereby that in many stipulations a thorough adaptability is observable. The Act entails domestic rules and regulations pertaining to Iranian sovereignty and jurisdiction upon its marine areas and triggers relevant rights and obligations on foreign States and International institutions within those areas. However, The Act as an outstanding lawmaking milestone in Iran, has been drafted and devised thoughtfully and skillfully, taking into account the existing and possible developments in the arena of international law of the sea, despite the fact that Iran’s non-membership to the UNCLOS is a major challenge within that arena. This paper seeks to analyze the stipulations set forth in the Act as to what extent they share consistencies or entail inconsistencies with the current development of the international law of the sea and namely the UNCLOS. International Law Law of the Sea UN 1982 Convention on the Law of the Sea Act on the Marine Areas of I.R. Iran in the Persian Gulf and the Oman Sea Marine Scientific Research. 2016 1 01 39 51 http://joc.inio.ac.ir/article-1-875-en.pdf
24-876 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Impacts of Land Use Changes on Water Quality of Anzali International Wetland Maryam Fallah maryam.fallah85@gmail.com Sima Fakheran Isfahani In the recent years, International Anzali wetland has been exposed to changes by dumping sewage water, land uses changes and sediment deposition that caused the reduction of the wetland depth and the aquatic growing up. In this study, the effects of land uses changes on wetland;#39s water quality was investigated from 1985 to 2014 by determining the land uses on wetland using GIS and measuring the water quality parameters. The results showed that most part of the forest was replaced with agricultural fields and urban areas respectively. Based on Principal Component Analysis (PCA), urban and agricultural area were the most related with the first principal component (PC1). Nitrate, total alkalinity, BOD5, COD and conductivity were less related respectively. The result showed that during these years, forest lands changed to agricultural fields and urban area. Anzali wetland Principle components analysis (PCA) Land use Water quality. 2016 1 01 53 59 http://joc.inio.ac.ir/article-1-876-en.pdf
24-877 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Study of Histological Structure of Spleen and Head Kidney in Otolithes ruber and Liza abu from Musa Creek Zahra Kiani zahra_kiani633@yahoo.com Negin Salamat Abdol-Ali Movahedinia Parvin Sadeghi The present study aimed to study the tissue structure of hematopoietic organs (head kidney and spleen) in two native fish species (Otolithes ruber and Liza abu) from the Persian Gulf. In this regards, 100 Otolithes ruber and Lisa abu were collected from 5 different stations including: Petrochemical, Ghanam, Zangi, Douragh and Patil stations, all situated in Mosa creek. Fish were dissected and tissue samples were taken from spleen and head kidney and fixated in formalin 15%. Tissue sections were prepared according to the routine histological methods and then were stained with hematoxylin and eosin (H&E). Increased number of melanomacrophage aggregations, degeneration of renal tubules and leukocyte infiltration were observed in both fish species collected from Petrochemical station. On the other hand, the hematopoietic organs in fish caught at Patil station had relatively normal structure. As it seems, there is a close relation between the tissue structure of studied organs and the contamination of each station. The pattern was as follow: Petrochemical station> Ghanam> Zangi> Doragh> Patil. Musa creek Head-kidney Spleen Otolithes rube Liza abu Tissue structure Hematopoietic organs. 2016 1 01 61 68 http://joc.inio.ac.ir/article-1-877-en.pdf
24-878 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Study on Length Structure, Catch Composition, and Catch per Unit Effort of Pharaoh Cuttlefish (Sepia pharaonis) Bottom Trawling in the Gulf of Oman Morteza Salahi-gezaz morteza.salahi@gmail.com Seyed Yousef Paighambari Reza Abbaspour-Naderi The aim of this study was to estimate CPUE, CPUA, length structure, and by-catch composition of Pharaoh Cuttlefish trawl fishery in north continental shelf of the Gulf of Oman (Chabahar). Random sampling was done by bottom trawler during May to September 2014. Amount of cuttlefish showed significant difference between sampling period (P<0/05). Mean (±SD) CPUE and CPUA for Cuttlefish calculated 203.1±150.8 (kg/h) and 1948±345.7 (kg/nm2) respectively. The length of Cuttlefish caught was from 4 to 33 (cm) with tow peak which ranged from 5-16 and 16-33 (cm) during sampling period. The composition of by-catch was comprised of 42 families including 47 teleosts, 9 elasmobranchs, 3 cephalopods, and 3 crustaceans. In teleosts, the highest mean weight and occurrence rate belonged to large-head hairtal (Trichiurus lepturus) and Japanese threadfin bream (Nemipterus japonicus) respectively. The highest mean weight in by-catch of the classes’ elasmobranchs, cephalopods, and crustaceans were Torpedo sinuspersici, Uroteuthis duvauceli, and Scyllaridae respectively. Bottom trawl Pharaoh Cuttlefish (Sepia pharaonis) CPUE CPUA by-catch composition Length structure Gulf of Oman. 2016 1 01 69 76 http://joc.inio.ac.ir/article-1-878-en.pdf
24-879 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Molecular Phylogeny Study of the Sea Anemone Genus Anemonia (Actiniaria: Actiniidae) Based on Mitochondrial (COI) DNA Sequences in the Persian Gulf Hosein Zolgharnein Saba Hoseini saba.hoseyny@gmail.com Sea anemones (order: Actiniaria) are a subclass of Hexacorallia. They are very varied and are organisms with a simple skeletal polyp. The specie in this study was collected from Larak Island in the Persian Gulf. DNA was extracted from the sample and a part of mtDNA COI gene was amplified. Two pairs of primers were designed to amplify a final target of 600 bp using PCR method which the product was successively sequenced. The purpose of this study was the molecular identification of the Persian Gulf sea anemone. The nucleotide and protein sequences obtained from this anemone’s COI gene were annotated in NCBI Gene Bank as Anemonia sp. PG, the PG standing for the Persian Gulf.  Phylogenetic studies were performed to compare the partial sequences of COI genes of 16 sea anemones (order: Actiniaria) with the newly identified anemone (Anemonia sp. PG).  Phylogenetic studies based on Neighbor-Joining analysis showed sister relations between Anemonia sp. PG species from Iran and Anemonia sp. Anem species but did not show monophyletic relationships between sea anemone families. Sea anemone Phylogenetic Molecular identification COI Persian Gulf. 2016 1 01 77 83 http://joc.inio.ac.ir/article-1-879-en.pdf
24-880 2024-03-29 10.1002
Journal of Oceanography 1562-1057 2476-6755 doi 2016 6 24 Accuracy Assessment of the Coral Reef Mapping Using Landsat-8 Imagery- Case Study: Persian Gulf Amir Masoud Chegoonian achegoonian@mail.kntu.ac.ir Mehdi Mokhtarzade Mohammadjavad Valadan Zouj Mehdi Bolouki In this paper, coral reef mapping for the Persian Gulf using medium resolution LANDSAT 8 was investigated. The research was accomplished on data collected from diving in Queshm and Larak Islands, Persian Gulf. After image pre-processing, the Maximum Likelihood algorithm was implemented for satellite image classification. The research presents correspondent results with similar researches on coral reefs around the world. It also showed that medium resolution satellite images were capable of mapping 2 to 4 classes with the accuracy of 70% on coral reefs in the area. The best mapping level was determined with 3 and 4 classes. Results showed that increase in number of classes will cause average mapping accuracy to be decreased fewer than 50%. Coral reef Sattelite images Landsat 8 Classification Persian Gulf. 2016 1 01 85 93 http://joc.inio.ac.ir/article-1-880-en.pdf