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Journal of Marine Research
Published by Universitas Diponegoro
ISSN : -     EISSN : 24077690     DOI : 10.14710/jmr.v9i4.28340
Core Subject : Science,
The Journal of Tropical Fisheries Management is managed by the Department of Water Resource Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University aims to publish the results of basic, applied research in the scope of fisheries resources, fish stock studies, and population dynamics, fish biodiversity, fisheries technology, industrialization and fish trade, fisheries management, and fisheries development policies in the tropics, especially Indonesia. The scope of the area includes: Marine Fisheries Coastal Fisheries Inland Fisheries The focus and scope of this publication are expected to contribute thoughts for the government to strengthen the science of fisheries management
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Articles 825 Documents
Kajian Kondisi Lahan Mangrove di Desa Bedono, Kecamatan Sayung, Kabupaten Demak dan Kelurahan Mangunharjo, Kecamatan Tugu, Kota Semarang Zaky, Abdul Rohman; Suryono, Chrisna Adhi; Pribadi, Rudhi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (464.865 KB) | DOI: 10.14710/jmr.v1i2.2024

Abstract

Mangrove ecosystem have an important role in coastal and marine areas. The existence of these ecosystems in the midst of human life provides many benefits. There are several benefits that are directly or indirectly. Utilization of these ecosystems can slowly lead to a problem that needs to be done the proper management efforts for the utilization of mangrove areas can be done in an optimal and sustainable. One of these management is to evaluate mangrove land condition. The results showed that in both study site physical factor of inundation was the most dominant, while chemical factor even though mostly also similar. Land use and land interaction against current and wave were the most influence factor on mangrove land suitability in Bedono, while in Mangunharjo the most dominant was land use. In term of land suitability for mangrove both Bedono and Mangunharjo were fall into sufficient enough category with physical factors more dominant than the chemicals.
ESTIMASI DAYA DUKUNG TERUMBU KARANG BERDASARKAN BIOMASSA IKAN KARANG DI PERAIRAN MISOOL SELATAN, RAJA AMPAT, PAPUA BARAT Prasetya, Sigit Heru; Munasik, Munasik; Ambariyanto, Ambariyanto
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.903 KB) | DOI: 10.14710/jmr.v3i3.5995

Abstract

Terumbu karang merupakan ekosistem yang memiliki banyak fungsi ekologis. Penelitian ini bertujuan untuk mengetahui kondisi terumbu karang, biomassa ikan karang,dan estimasi daya dukung tutupan karang keras hidup pada area terumbu karang di perairan Misool Selatan. Pengambilan data lapangan dilakukan pada tanggal 15-28 November 2013. Nilai daya dukung terumbu karang diperoleh dengan perhitungan luasan area terumbu karang dikalikan jumlah biomassa pada area transek pengamatan (250 meter). Pengambilan data kondisi terumbu karang menggunakan metode Point Intercept Transect dan sensus visual untuk ikan karang pada kedalaman 10 meter dengan 5 transek sepanjang 50 meter sejajar garis pantai. Berdasarkan hasil penelitian diperoleh bahwa kondisi terumbu karang di lokasi penelitian dalam keadaan sedang hingga baik dengan total genus yang ditemukan sebanyak 32 genus. Nilai Biomassa ikan karang tertinggi ada pada stasiun Waaf sebesar 97 kg/ha dan terendah pada stasiun Yoss sebesar 32,8 kg/ha. nilai daya dukung terumbu karang dengan persentase tutupan karang 36,7-70,7% serta bentuk lifeform yang ada di lokasi penelitian untuk tiap Famili ikan karang Scaridae 2,55-50,3 kg, Serranidae 0,5-6,8 kg, dan Caesionidae 6,4-44,8 kg. Berdasarkan hasil penelitian dapat disimpulkan bahwa kondisi tutupan karang keras pada area terumbu karang mempengaruhi biomassa ikan karang untuk beberapa family ikan yaitu Caesionidae, Scaridae, dan Serranidae.
Uji Toksisitas Ekstrak Pigmen Kasar Mikroalga Spirulina platensis Dengan Metode Uji Bslt (Brine Shrimp Lethality Test) Rizkina, Rani Agustian; Yudiati, Ervia; Sedjati, Sri
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (155.676 KB) | DOI: 10.14710/jmr.v2i1.2051

Abstract

Spirulina platensis is a microalgae which rich of nutrients and has a potential extracts as an antioxidant, antimicrobial, antiviral, anti-inflamantory and antitumor. The aims of this research were to determine toxicity of methanol extract and crude pigment (methanol-acetone and diethyl ether fractions) of S. platensis against nauplii Artemia sp. aged 24 hour at 3rd instar as an antitumor. The aims of this research were to determine toxicity of methanol extract and crude pigment (methanol-acetone and diethyl ether fractions) of S. platensis against nauplii Artemia sp. The research was conducted in August-October 2011 at Microalgae Laboratory, Marine Station, Diponegoro University Teluk Awur Jepara. Toxicity test methanol and crude pigment extract calculated by LC50-24 hour with BSLT (Brine Shrimp Lethality Test) methodes and pigment analysis was carried out by TLC (Thin Layer Chromatography). The results of BSLT (Brine Shrimp Lethality Test) methanol extracts and crude pigment (methanol-acetone and diethyl ether fractions) showed that LC50-24 hour values of each extract methanol (446,68 ppm), crude pigment extract ethanol-acetone (134.9 ppm) and a crude fraction pigment extract diethyl ether (91.2 ppm). The crude pigment has a cytotoxic effect LC50-24 hours <1000 ppm showed that the extracts are toxic to nauplii Artemia sp. 24 hours, 3rd instar and has a potential antitumor compounds. The results of pigments identification showed contains carotenoids and chlorophylla.
Pemetaan Area Genangan Banjir Pasang Di Kawasan Lahan Budidaya Air Payau Kota Pekalongan Provinsi Jawa Tengah Drestanto, Adhyaksa Saktika; Indarjo, Agus; Helmi, Muhammad
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.38 KB) | DOI: 10.14710/jmr.v3i4.8365

Abstract

Kota Pekalongan memiliki Tempat Pelelangan Ikan (TPI) terbesar di Jawa Tengah, namun terjadi penurunan terhadap produksi dan produktivitas yang signifikan. Alternatif yang dapat dilakukan untuk menekan penurunan produksi dan produktivitas maka dapat dilakukan budidaya ikan air payau di wilayah pesisir. Pembuatan lahan budidaya air payau banyak mengalami masalah, utamanya adalah banjir pasang air laut. Berdasarkan pada hal tersebut, maka perlu dilakukan pemetaan daerah terkena dampak area genangan  banjir pasang dan mengkaji lahan budidaya air payau yang terkena dampak area genangan banjir pasang.Penelitian ini dilakukan untuk memetakan lahan budidaya air payau yang terkena dampak area genangan banjir pasang. Metode penelitian yang digunakan dalam penelitian ini antara lain metode rektifikasi, komposit warna, purposive sampling, admiralty, sistem informasi geografi dan regresi linear sederhana. Lima kelurahan yang memiliki lahan budidaya air payau yang terkena dampak area genangan banjir pasang. Kelurahan Bandengan 108,66 ha, Kandang Panjang 59,62 ha, Panjang Baru 27,43 ha, Krapyak Lor 115,55 ha dan Degayu 38,91 ha. Hanya lahan budidaya air payau pada Kelurahan Degayu saja yang tidak terkena dampak area genangan banjir pasang seluruhnya.
Komposisi dan Kelimpahan Gastropoda Pada Ekosistem Mangrove Di Desa Tireman, Kabupaten Rembang, Jawa Tengah Laraswati, Yuli; Soenardjo, Nirwani; Setyati, Wilis Ari
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (833.507 KB) | DOI: 10.14710/jmr.v9i1.26104

Abstract

Ekosistem mangrove mermiliki manfaat sebagai tempat mencari makan serta habitat bagi organisme, mislanya gastropoda. Gastropoda di ekosistem mangrove berperan dalam proses dekomposisi yaitu dengan mencacah daun menjadi lebih kecil, yang kemudian dilanjutkan oleh mikroorganisme. Kepadatan  gastropoda dipengaruhi oleh kegiatan yang terdapat pada ekosistem dan dapat memberikan efek pada kelangsungan hidup gastropoda.Tujuan penelitian adalah untuk mengetahui struktur komunitas gastropoda pada ekosistem mangrove Desa Tireman Kecamatan Rembang, Jawa Tengah. Metode penentuan lokasi sampling menggunakan metode purposive sampling pada 3 lokasi dengan kerapatan mangrove yang berbeda. Pengambilan sampel gastropoda dilakukan dalam transek 5 x 5m dan sampel yang didapat kemudan disortir, diawetkan dan diidentifikasi. Hasil penelitian ditemukan 9 spesies gastropoda termasuk kedalam 3 famili yaitu Casidula nucleus, C. aurisfelis (Ellobiidae), Littoraria scabra, L. carinifera, L. Melanostama (Littorinidae), Cerithidea quadrata, C. cingulata, C. alata, Telescopium telescopium (Potamididae). Spesies yang paling sering ditemukan adalah Cassidula aurisfelis dan Cassidula nucleus. Nilai rata-rata kelimpahan berkisar antara 6,28 - 15,72 Ind/m2. Nilai indeks keanekaragaman termasuk ke dalam kategori rendah hingga sedang. Nilai rata-rata indeks keseragaman termasuk kedalam kategori rendah (0.15-0.27). Nilai rata-rata indeks dominansi menunjukkan tidak adanya dominansi dari spesies tertentu. Pola sebaran menunjukkan pola sebaran mengelompok dan acak. Nilai kesamaan komunitas gastropoda tergolong dalam kategori tinggi. Frekuensi kehadiran gastropoda kategori jarang hingga sangat sering.  The mangrove ecosystem has benefits as a place to eat and habitat for the organism, the gastropod's missile. Gastropods in the mangrove ecosystem play a role in the decomposition process, with the smaller leaves, which are then followed by microorganisms. The density of gastropods is influenced by activities found in ecosystems and can provide an effect on the viability of gastropods. The purpose of research is to know the structure of the gastropods community in the mangrove ecosystem of Tireman Village Rembang District, Central Java. Sampling method of determining location using purposive sampling method in 3 locations with different mangrove density. The gastropod sampling is done in the 5 x 5m transect and the samples obtained are then sorted, preserved and identified. The results of the study found 9 species of gastropods included in the three families, namely Casidula nucleus, C. Aurisfelis (Ellobiidae), Littoraria scabra, L. Carinifera, L. Melanostama (Littorinidae), Cerithidea quadrata, C. cingulata, C. alata, Telescopium telescopium (Potamididae). The most commonly found species are the Cassidula aurisfelis and the Cassidula nucleus. The average value of abundance ranges between 6.28-15.72 Ind/m2. The value of diversity index belongs to low to moderate category. The average value of uniformity index is included in low category (0.15-0.27). The average value of the Dominancy index indicates the absence of dominance of a particular species. The spread pattern shows both group and random distribution patterns. The value of gastropods community similarity belongs to high category. The frequency of presence of gastropods is rare until very frequent.
Kajian Valuasi Ekonomi Hutan Mangrove Di Desa Pasar Banggi, Kecamatan Rembang, Kabupaten Rembang Hanifa, Aurora; Pribadi, Rudhi; Nirwani, Nirwani
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.243 KB) | DOI: 10.14710/jmr.v2i2.2475

Abstract

Economi valuation is an instrument used to know a function of mangrove forest. The object of this research are to find out totalized economic valuation by means of direct valuation at mangrove area Pasar Banggi village, Rembang. Economic valuation can be able by totalized a direct use value, indirect use value, Option value and Existence value. Identification result at Pasar Banggi village are consist by four components there are, direct use values : Bandeng fishponds, saltponds, mangrove seeds, catching fishes, oyster and crab, indirect use values : breakwater as a resists of abration, option value : biodiversity, Existence value : habitats. The biggest value in this research is the resist of abration assumption as breakwater that is as bis as Rp.18.717.774.250-/year and total economic value from economis Pasar Banggi village, Rembang that is as big as Rp.19.610.846.229.-/year.
Potensi Simpanan Karbon Pada Lamun Cymodocea serrulata Di Pantai Prawean, Jepara Baeti, Tiara Nur Baeti; Hartati, Retno Hartati; Riniatsih, Ita Riniatsih
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (458.899 KB) | DOI: 10.14710/jmr.v8i1.24322

Abstract

Pemanasan global merupakan akibat dari peningkatan gas-gas rumah kaca (GRK), seperti halnya gas karbondioksida, metana, nitro dioksida, maupun gas alam lainnya. Ekosistem padang lamun di perairan Pantai Prawean, Kabupaten Jepara memiliki fungsi ekologis yang sangat penting sebagai penyangga ekosistem lain di perairan tersebut. Potensi padang lamun diantaraanya adalah sebagai penyimpan emisi karbon, sehingga mampu mencegah terjadinya pemanasan global (global warming) atau biasa disebut sebagai blue carbon. Tujuan penelitian ini adalah untuk menentukan potensi simpanan karbon pada lamun jenis Cymodocea serrulata di perairan Pantai Prawean, Kabupaten Jepara. Penelitian ini dilakukan pada bulan Desember 2018 dan Maret 2019 dengan metode pengukuran karbon pada lamun Loss of Ignition (LOI). Hasil penelitian menunjukkan bahwa biomassa terbesar terletak pada bagian Below Ground (akar dan rhizoma) dengan persentase di atas 50% pada kedua waktu pengamatan bila dibandingkan dengan jaringan lamun di atas substrat (daun). Rata-rata kandungan karbon tertinggi pada kedua waktu penelitain terletak pada bagian akar lamun dengan persentase nilai simpanan karbon mencapai 55 – 57%. Terjadi penurunan nilai simpanan karbon dalam dua kali pengambilan data, yakni pada bulan Desember 2018 total simpanan karbon pada lamun Cymodocea serrulata mencapai 6,77 ton sedangkan pada bulan Maret 2019 nilainya turun menjadi 5,38 ton. Penurunan total simpanan karbon pada lamun ini di duga diakibatkan oleh adanya perubahan faktor fisik perairan serta adanya faktor antropogenik di wilayah perairan tersebut.Global warming is a result of increasing greenhouse gases (GHG), such as carbon dioxide, methane, nitrous dioxide, and other natural gas. Seagrass ecosystems in the waters of Prawean Beach, Jepara Regency have very important ecological functions as a buffer for other ecosystems in these waters. The potential of seagrass bed is as a store of carbon emissions, so as to prevent global warming or commonly referred to as blue carbon. The purpose of this research is to determine the potention of carbon deposits in seagrass species of Cymodocea serrulata in the waters of Prawean Beach, Jepara Regency. This research was conducted in December 2018 and March 2019 with the method of carbon measurement in seagrass Loss of Ignition (LOI). The results showed that the largest biomass was located in the Below Ground (roots and rhizomes) with a percentage above 50% at both observation time when compared to seagrass tissue on the substrate (leaves). The highest average carbon content at both time of the survey was located in the seagrass root section with a percentage of the value of carbon deposits reaching 55 - 57%. There was a decrease in the value of carbon deposits in two data collection, namely in December 2018 the total carbon deposits in seagrass Cymodocea serrulata reached 6,77 tons while in March 2019 the value dropped to 5,38 tons. The decrease in total carbon deposits in seagrasses is thought to be caused by changes in physical factors of the waters and the presence of anthropogenic factors in these waters.
Struktur Komunitas Zooplankton di Ekosistem Lamun Alami dan Berbagai Lamun Buatan Perairan Teluk Awur, Jepara Hibatul, Tasa; Riniatsih, Ita; Azizah, Ria
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (225.601 KB) | DOI: 10.14710/jmr.v2i4.3679

Abstract

Zooplankton are one component in the food chain as measured in relation to the productivity value of an ecosystem. This is because the zooplankton is a major connecting link between plankton and nekton. Teluk Awur Waters are shallow waters with depths less than 10 meters. These waters are also under pressure from various human activities. The aim of this research were to find out the community structure of Zooplankton on native and artificial seagrass ecosystems in Teluk Awur waters, Jepara. The method of this research was a case study method with the exploratory nature of data collection used Sample Survey Method. The location was set as a research Station was the Station 1, as the native seagrass, and Station 2, 3, and 4 as the artificial seagrass. Sampling was conducted every 2 weeks for 4 times of sampling of each 3 times making use planktonnet with mesh size 45 μm. Sampling was carried out horizontally in the morning on July 2012 to September 2012. The results obtained 37 genera on native seagrass, while on the third of artificial seagrass was obtained 51 genera. Abundance obtained on the native seagrass was an average of 3845,482 specs/L and on the artificial seagrass was an average of 3146,303 specs/L. Diversity of zooplankton showed the medium diversity, an average of 2,08 obtained on the native seagrass and an average of 2,15 obtained on the artificial seagrass. Homogenity obtained average of 0,48 on the native seagrass and 0,50 on the artificial seagrass which is showed that the level of homogeneity is in medium range. The index of domination on the native seagrass was obtained an average 0,51 which is showed that the level of dominance is in medium range and on the artificial was obtained an average 0,49 which is showed that the level of dominance is in low range.
Aktivitas Antibakteri Ekstrak Metanol Rumput Laut Gracilaria verrucosa, Greville, 1830 (Florideophyceae : Gracilariaceae) di Balai Besar Perikanan Budidaya Air Payau Jepara Widodo, Radhian Wikanarto; Subagiyo, Subagiyo; Pramesti, Rini
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (533.735 KB) | DOI: 10.14710/jmr.v8i3.25271

Abstract

Infeksi bakteri patogen menjadi masalah kesehatan dunia. Antibiotik untuk penanggulangan infeksi menjadikan bakteri resisten karena pemakaiannya tidak sesuai dosis. Permasalahan ini dapat diatasi salah satunya dengan pencarian sumber antibiotik baru termasuk diantaranya pada rumput laut. Penelitian ini bertujuan untuk menentukan aktivitas antibakteri ekstrak metanol G. verrucosa terhadap Escherichia coli, Bacillus cereus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Vibrio anguillarum, dan Vibrio alginolyticus. Penelitian dilakukan dengan metode eksperimental laboratoris. Sampel rumput laut hasil budidaya Balai Besar Perikanan Budidaya Air Payau (BBPBAP) Jepara dikeringkan kemudian dimaserasi dengan metanol selama 2x24 jam. Aktivitas antibakteri ekstrak diuji pada konsentrasi 100 µg/disk, 50 µg/disk, 25 µg/disk, dan 10 µg/disk kemudian dilakukan uji fitokimia. Hasil uji aktivitas antibakteri menunjukkan bahwa ekstrak metanol G. verrucosa tidak memiliki aktivitas antibakteri. Uji fitokimia menunjukkan ekstrak mengandung flavonoid, saponin, steroid, dan triterpenoid. Pathogenic bacterial infection become a world health problem. Antibiotics for prevention of infection make bacteria resistant due to the incorrect dosage. One of these problems can be overcome by finding a new source of antibiotics including seaweed. This study aims to determine the antibacterial activity of methanol extract of G. verrucosa against Escherichia coli, Bacillus cereus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Vibrio anguillarum, and Vibrio alginolyticus. Laboratory experimental method was used in this study. Seaweed samples from the cultivation at Brackish Water Aquaculture Center (BBPBAP) Jepara were dried and then macerated with methanol for 2x24 hours. The antibacterial activity of the extract was tested at concentration of 100 µg / disk, 50 µg / disk, 25 µg / disk, and 10 µg / disk then phytochemical tests were carried out. The results of antibacterial activity test showed that G. verrucosa methanol extract did not have antibacterial activity. The phytochemical test showed that seaweed extract contained flavonoids, saponins, steroids, and triterpenoids
Akumulasi Logam Berat Pb pada Karang Acropora aspera: Studi Pendahuluan Panuntun, Putra; Yulianto, Bambang; Ambariyanto, Ambariyanto
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (194.326 KB) | DOI: 10.14710/jmr.v1i1.2846

Abstract

areas. The high human activity can lead to environmental degradation and coral reef ecosystems. One of the reasons is the heavy metal pollution. This present study aims to investigate on the accumulation of heavy metal Pb on the coral, Acropora aspera. The research was conducted at the Laboratory of Marine Science, Faculty of Fisheries and Marine Sciences, University of Diponegoro Semarang, Central Java. The method used is an experimental laboratory with coral A. aspera, using the heavy metal Pb with concentration 0.010 mg/l, and one control (0 mg/l). Coral, A. aspera was collected from Panjang Island. From this study it can be concluded that the coral A. aspera have capacities to accumulate heavy metals Pb. Accumulation of coral A. aspera significantly highest exposure of heavy metals Pb on day 10th.

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