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Journal of Marine Research
Published by Universitas Diponegoro
ISSN : -     EISSN : 24077690     DOI : 10.14710/jmr.v9i4.28340
Core Subject : Science,
Earth & Planetary Sciences
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
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Struktur Komunitas Krustasea: Decapoda Pada Ekosistem Mangrove Di Kecamatan Genuk, Semarang Putri, Denanda Christina; Suprijanto, Jusup; Taufiq-Spj, Nur
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (547.46 KB) | DOI: 10.14710/jmr.v7i1.25881

Abstract

ABSTRAK : Mangrove merupakan sumber makanan potensial dalam berbagai bentuk bagi semua biota yang hidup di ekosistem mangrove. Kondisi ekosistem  mangrove  yang  terganggu dapat menyebabkan penurunan fungsi ekologis ekosistem mangrove. Wilayah pesisir Semarang dimanfaatkan untuk berbagai aktivitas manusia seperti tempat industri, pertambakan, pabrik dan dapat juga sebagai tempat pembuangan limbah. Oleh karena itu perlu adanya penelitian mengenai  struktur komunitas krustasea pada ekosistem mangrove yang berbeda. Tujuan penelitian ini adalah mengkaji komposisi dan kelimpahan krustasea yang berada di kawasan vegetasi mangrove Kecamatan Genuk, Kota Semarang pada lokasi yang berbeda. Penelitian ini menggunakan metode deskriptif eksploratif, sedangkan metode penentuan lokasi menggunakan metode purposive sampling. Materi yang digunakan dalam penelitian ini adalah sampel krustasea dan kerapatan mangrove. Penelitian dilaksanakan pada bulan Juni - Agustus 2016. Analisis sampel penelitian dilakukan di Laboratorium Teknik Lingkungan Fakultas Teknik, Universitas Diponegoro. Hasil penelitian yang diperoleh adalah Krustasea yang ditemukan pada penelitian ini terdapat 11 spesies yang terdiri dari 5 famili dalam 2 infra ordo yang berbeda. Infraordo Brachyura yang paling banyak ditemukan dengan jumlah 4 famili. Sedangkan untuk infraordo Anomura ditemukan satu famili. Kelimpahan tertinggi terdapat pada Stasiun IV sebesar 0,372 ind/100 m2.Secara keseluruhan nilai Indeks Keanekaragaman masuk dalam kategori sedang (H’=1,57-3,02). Indeks Keseragaman termasuk dalam kategori tinggi (E= 0,93-0,99). Indeks Dominansi termasuk dalam kategori tidak ada dominansi (C=0,13-0,33). Pola sebaran jenis yang mendominasi adalah pola sebaran acak. ABSTRACT : Mangrove is a potential food source  for organisms which live in mangrove ecosystem. Disrupted mangrove ecosystem can cause a decrease in  ecological function. Semarang coastal areas are used for various human activities such as industrial sites, farms, factories and also as a waste disposal site. Therefore, research on the community structure of crustaceans in different mangrove ecosystem need to be conducted. The purpose of this study is to assess the compisition and abundance of crustaceans  in the mangrove vegetation area at Genuk subdistrict, Semarang in different locations to determine the abundance of crustaceans in different ecosystem. This research used descriptive explorative, while the method of determining the locations using purposive sampling method. The materials used in this study were sample crustaceans and mangrove density. The research was conducted in June-August 2016. The samples were analyzed at the Laboratory of Environmental Engineering, Faculty of Engineering, University of Diponegoro. The crustaceans found in this study were as many 11 species consisting of 5 families in two different infra order. Infra order Brachyura was the most commonly found with a number of 4 families. While there was only one family which found from infra order Anomura. The highest abundance found in Stastion IV with the result 0.372ind/100 m2. Overall, the Diversity Index value in the category as medium (H’=1,57-3,02). Uniformity Index was included in the high category (E= 0,93-0,99). Dominance Index included in the category of no dominance (C=0,13-0,33). The distribution pattern of dominant species is a random distribution pattern.
Struktur Komunitas Makrozoobenthos di Perairan Wilayah Morosari Desa Bedono Kecamatan Sayung Demak Ulfah, Yulia; Widianingsih, Widianingsih; Zainuri, 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 (290.469 KB) | DOI: 10.14710/jmr.v1i2.2037

Abstract

The pond area of Bedono waters become a shallow water, due to the influence of high tide (rob). This condition affect the macrozoobenthos, one of the animals that live in the area. The objective of this research is to look for the macrozoobenthos community structure of in the Region Morosari Waters, Bedono District of Sayung, Demak. Twenty five polychaeta species were found in this research, 7 species of bivalves, 6 species of gastropods and 1 species of crustacean, with abundances ranging between 36-1331 ind/m2 with diversity index value (H ') in each research ranged from 2.95 (moderate diversity level) to 0.83 (low diversity level), with evennes index (e) ranged from 0.46 (moderate evennes index) to 1.00 (high evennes index). Domination index (C) ranged from 0.15 (this value shows that no domination index) to 0.69 (this value shows that domination index).
Aktivitas Antifouling dan Karakteristik Fitokimia Ekstrak Rumput Laut Sargassum sp. dari Perairan Gunung Kidul, Yogyakarta Hakim, Muhamad Fikri Hudi Nur; Widowati, Ita; Sabdono, Agus
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (473.639 KB) | DOI: 10.14710/jmr.v7i3.25910

Abstract

ABSTRAK : Marine biofouling merupakan tumbuhnya organisme yang tidak diinginkan pada suatu permukaan yang terendam air laut. Penempelan ini dapat menyebabkan gangguan teknis dan kerusakan. Penelitian ini bertujuan untuk mencari senyawa aktif antifouling yang ramah lingkungan sebagai pengganti TBT. Materi yang digunakan adalah ekstrak rumput laut Sargassum echinocarpum dan S. cinereum dengan berbagai macam pelarut (n-heksan, etil asetat, dan metanol). Sampel diambil dari perairan Gunungkidul, Yogyakarta. Bakteri biofilm diisolasi dari substrat plat kayu mahoni yang direndam selama 2 minggu. Metode dalam penelitian ini adalah Uji aktivitas antifouling menggunakan metode disk-diffusion, Uji Fitokimia, Uji Biokimia, dan Uji Brine Shrimp Lethality Test. Hasil penelitian menunjukan aktivitas antimikrofouling terbaik ditunjukkan oleh ekstrak kasar S. cinereum dengan pelarut etil asetat dan S. echinocarpum dengan pelarut metanol. Berdasarkan analisa One-Way ANOVA dengan signifikansi <0,05menunjukkan ekstrak dengan pelarut metanol dan etil asetat tidak berbeda nyata, sedangkan ekstrak dengan pelarut n-heksan tidak membentuk zona hambat. Uji Biokimia menunjukkan jenis bakteri yang dapat dihambat adalah Bacillus sp., dan Nacordiasp. Hasil fitokimia menunjukkan ekstrak S. cinereum dengan pelarut etil asetat mengandung senyawa alkaloid, quinon, steroid, dan flavonoid. Sedangkan ekstrak S. echinocarpum dengan pelarut metanol mengandung senyawa quinon, triterpenoid, dan flavonoid. Uji Brine Shrimp Lethality Test menunjukkan bahwa ekstrak S. echinorcarpum dan S. cinereum dengan pelarut metanol dan n-heksan memiliki nilai LC50 568,4347 bpj; 663,613 bpj; 639,711 bpj; dan 855,3114 bpj dengan kategori toksik. Dapat disimpulkan dari penelitian ini bahwa ekstrak S. cinereum dan S. echinocarpum dapat digunakan sebagai sumber antifouling.  ABSTRACT : Marine biofouling is the growth of unwanted organism on the structure, which is submerged in seawater. The attachment of those organisms could lead to technical because it attaches and destroys the structures.The aim of this research to find an active antifouling compound that is environmentally friendly as a replacement for TBT. This research used a sample of S. echinocarpum and S. cinereum, which was extracted in various solvents (n-hexane, ethyl acetate, and methanol). The seaweed samples were taken from Gunungkidul, Yogyakarta. The biofilm bacteria was isolated from the mahogany plate substrate that has been submerged in the sea for two weeks. Antifouling activity test used the disk diffusion method, Phytochemicals test used the Harborne test methods, Biochemical test used the Cowan and Steel methods, and Brine Shrimp Lethality Test used the Meyer methods. The results showed that the antimicrofouling activity is most well demonstrated by the extract of S. cinereum with ethyl acetate solvent and S. echinocarpum with methanol solvent. Based on the analysis of One-Way ANOVA with significance <0.05 is known that the different types of solvent does not affects the results of inhibitory zone where methanol and ethyl acetate  are not significantly different, which the extract with n-hexane solvent does not form an inhibition zone.Biochemistry test shows that the type of bacteria that can be inhibited is Bacillus sp., and Nacordia sp.. The results showed that the phytochemical extracts of the S. cinereum crude extract with ethyl acetate solvent contains alkaloid, quinone, steroid and flavonoid compounds. While the crude extract of S. echinocarpum with methanol solvent contains quinone, triterpenoid and flavonoid compounds.Brine Shrimp Lethality Test showed that the crude extract of S. echinorcarpum and S. cinereum with methanol and n-hexane occupy the toxic category with LC50 values 568.4347 bpj; 663.613 bpj; 639.711 bpj; and 855.3114 bpj. It was concluded that the crude extract of S. cinereum and S. echinocarpum making it possible to be used as a source of antifouling.
Analisa Sel Sedimen Sebagai Pendekatan Studi Erosi Di Teluk Lampung, Kota Bandar Lampung Provinsi Lampung Dianpurnama, Dianpurnama; Helmi, Muhammad; Yusuf, 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 (286.736 KB) | DOI: 10.14710/jmr.v2i1.2067

Abstract

Shoreline deformation is a result from sediment transport process with an intervention of current. Concept of sediment cell used to facilitate the analysis and it can be seen on satellite images Landsat. The purpose of this research is to identify sediment cell limit and dominant direction of sediment transport along shore, erosion and sedimentation analysis using sediment cell approachment based satellite images analysis and wave modeling. This research used remote sensing method to determine sediment cell limit and ground check method to identify the source, direction and limits of sediments movement. The landmass that got erosion and accretion was obtained from satellite images overlay. Satellite images which used in this research is Landsat 1990, 2000 and 2010. According to the result of overlay, seashore deformation for 20 years was dominated by accretion (167,71 ha wider than erosion). The result of overlay showed that average accretion rate was 8,3855 ha/year and average erosion rate was 1,1745 ha/year. Results of overlay processing based on erosion and accretion showed that seashore in Bandar Lampung divided into 6 sub sediment cell with 5 limit of static sub cell and 1 dynamic sub cell appropriate for cell sediment concept.
Studi Kesesuaian Wisata Untuk Wisata Rekreasi Pantai Dan Mutu Air Laut Di Pantai Empu Rancak Kabupaten Jepara Prajeki, Ody; Irwani, Irwani; Indarjo, Agus
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.257 KB) | DOI: 10.14710/jmr.v3i4.11413

Abstract

Pemanfaatan sumberdaya pesisir dan laut di Kabupaten Jepara dapat berupa pengembangan wisata pantai dalam hal ini di wilayah Pantai Empu Rancak. Salah satu bentuk wisata pantai adalah kegiatan rekreasi pantai. Namun, dalam melakukan upaya pengembangan wisata di Pantai Empu Rancak perlu diadakan identifikasi dan pendekatan permasalahan terlebih dulu. Hal yang paling mendasar dan menjadi tujuan dari penelitian ini adalah dengan melakukan studi mengenai tingkat kesesuaian untuk kegiatan rekreasi pantai dan tingkat pencemaran yang terjadi di Pantai Empu Rancak. Penelitian dilakukan dengan observasi lapangan (pengumpulan data primer dan data sekunder) selama 1 bulan pada bulan September 2013 sampai bulan Oktober 2013 di Pantai Empu Rancak Kabupaten Jepara, yang terbagi dalam enam titik lokasi sampling dari bagian selatan hingga ke bagian utara pantai. Pengumpulan data primer terdiri dari data fisika dan kimia perairan serta parameter kesesuaian wisata rekreasi pantai, seperti tipe pantai, lebar pantai, kemiringan pantai, kecerahan perairan, kecepatan arus, kedalaman perairan, material dasar perairan, penutupan lahan pantai, keberadaan biota berbahaya dan ketersediaan air tawar.  Metode yang digunakan untuk analisis hasil penelitian adalah metode deskriptif dengan bantuan analisis Indeks Kesesuaian Wisata (IKW) dan Indeks Mutu Lingkungan Perairan ( IMLP ). Berdasarkan hasil yang didapat dari perhitungan Indeks kesesuaian wisata untuk kegiatan rekreasi pantai adalah sebagian besar diatas 80%. Hal ini menunjukkan bahwa wisata rekreasi pantai di Pantai Empu Rancak Kabupaten Jepara tergolong dalam kategori Sangat Sesuai (S1) untuk kegiatan rekreasi pantai. Sedangkan untuk mutu air laut hasil yang didapat kategori sedang
Pengaruh Suhu Ekstraksi Terhadap Kualitas Natrium Alginat Rumput Laut Sargassum sp. Pamungkas, Tri Aji; Ridlo, Ali; Sunaryo, Sunaryo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (168.599 KB) | DOI: 10.14710/jmr.v2i3.3135

Abstract

Sargassum sp. are the living marine resource that are potential as alginate resources. Sodium alginate is used in the food industry, and non food industry, such as for a coagulant, suspending, stabilizers, film formers, gel formation, and emulsifier. The objective of research was to know the effect of temperature exstraction toward quality of alginate, such as rendement, moisture, ashes content, and viscosity of Sargassum sp. Sampling of Sargassum sp. was done in Krakal Beach Gunung Kidul, Yogyakarta. The research method used experimental method and was design completaly Randomized Design (CRD). Samples were extracted by Na2CO3 7 % solution under diffirencees temperature from 40 ºC - 80 ºC, temperature range 10 °C, each treatment 3 times replicated. Correlation between extraction temperature and sodium alginate qualities were showed positive linier model regression for rendement sodium alginate, negative linier regression model for viscosity and moisture, but not significant for ash content. The result showed the highest rendement of sodium alginate was produced on temperature of 80 ºC, that was 28.31% ± 0.48%. The lowest moisture was produced on temperature of 80 ºC, that was 14.97 ± 1.55%. Highest viscosity was produced on temperature 40 ºC, that was 27.25 ± 0.93 cPs.
Konsentrasi Logam Pb Di Enhalus acoroides LF. Royle 1839 (Angiosperms : Hydrocharitaceae) dan Lingkungannya di Perairan Kartini Dan Teluk Awur, Jepara Rianda, Betta; Nuraini, Ria Azizah Tri; Sunaryo, Sunaryo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (610.878 KB) | DOI: 10.14710/jmr.v8i2.25092

Abstract

Lamun jenis Enhalus acoroides merupakan salah satu komponen keanekaragaman hayati yang tumbuh di Perairan Kartini dan Teluk Awur. Aktivitas pariwisata, pelabuhan, pembuatan, pengecatan, pengelasan, pembersihan dan lalu lintas kapal nelayan menjadi penyebab terakumulasinya logam berat di perairan. Logam berat Pb merupakan logam berat beracun dan berbahaya, bahan pencemar dan cenderung mengganggu kelangsungan hidup organisme perairan. Tujuan penelitian ini ialah mengetahui dan menganalisis kandungan logam berat Pb pada air, sedimen dan lamun Enhalus acoroides (akar dan daun) di Perairan Kartini dan Teluk Awur, Jepara, serta mengetahui tingkat pecemarannya berdasarkan baku mutu. Penelitian ini menggunakan metode deskriptif, sedangkan metode penentuan lokasi menggunakan metode purposive sampling. Hasil penelitian menunjukkan kandungan logam berat Pb air di Perairan Kartini sebesar 0,181-0,316 mg/l dan Perairan Teluk Awur sebesar 0,001-0,157 mg/l. Kandungan logam berat Pb sedimen di Perairan Kartini sebesar 2,424-3,463 mg/kg dan Perairan Teluk Awur sebesar 2,347-2,496 mg/kg. Kandungan logam berat Pb Lamun Enhalus acoroides pada akar di Perairan Kartini sebesar 0,918–1,854 mg/kg dan Perairan Teluk Awur sebesar 0,906–1,492 mg/kg. Kandungan logam berat Pb Lamun Enhalus acoroides pada daun di Perairan Kartini sebesar 0,764–1,458 mg/kg dan Perairan Teluk Awur sebesar 0,674–1,040 mg/kg. Enhalus acoroides seagrass as a component of biodiversity that grows in the waters of Kartini and Teluk Awur. Activities in these waters include tourism, ports, manufacture, painting, welding, cleaning and traffic of fishing vessels to cause of accumulated heavy metals in the waters. Heavy metal Pb is a toxic and dangerous heavy metal, polluting material and tends to interfere with the survival of aquatic organisms. The purpose of this study was to determine and analyze the Pb heavy metal content in water, sediment and seagrass Enhalus acoroides (roots and leaves) in Kartini and Teluk Awur waters, Jepara, and to determine the level of pollution based on quality standards. This research uses descriptive method, while the location determination method uses purposive sampling method. The results showed that the heavy metal Pb water content in Kartini waters was 0.181 mg/l - 0.316 mg/l and Teluk Awur waters was 0.01-0.157 mg/l. The heavy metal content of Pb sediment in Kartini waters is 2,424-3,463 mg/kg and Teluk Awur waters was 2,347-2,496 mg/kg. The heavy metal content of Pb in Enhalus acoroides in the roots of Kartini waters was 0.918-1.854 mg/kg and Teluk Awur waters was 0.906-1.492 mg/kg. Heavy metal content of Pb in Enhalus acoroides in leaves in Kartini waters was 0.764 mg/kg - 1.458 mg/kg and Teluk Awur waters was 0.674-1.040 mg/kg
Struktur Komunitas Makrobentos Polychaeta Di Ekosistem Mangrove Desa Bedono Kecamatan Sayung Kabupaten Demak Ni’amillah, Ni’amillah; Pribadi, Rudhi; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (252.757 KB) | DOI: 10.14710/jmr.v1i1.887

Abstract

Mangrove forest is a tropical coastal communities is dominated by several species of trees or characteristic shrubs that has the ability to grow in salty waters. The study aim was to describe structure community of Polychaeta Macrobenthos in the village of Bedono, district of Sayung, Demak Regency (06055’44”S - 110029’42”E) and has been conducted between April 2010 to September 2010. The area, due to its position in the northern coast of Java, has influence by Java Sea especially its long-shore current which in past decades has been changing due to the Semarang Port development. Effort has been made by OISCA, a Japan environmentally concerned NGO, to rehabilitate the area by planting mangrove even though the result is just still uncertain yet. This research was aimed to know the stucture of polychaeta macrobenthos communities Bedono Village, District Sayung, Demak Regency. This research used descriptive eksplorative method and while for the intake of sampel polychaeta conducted quantitative just taken that is only pursuant to volume unit. In this research, the location was divided into 4 stations, each with three replication of sampling transects. Intake sample conducted at fairish plot 1m x 1m with the deepness 10 cm. The result found 6 famili polychaeta : Nereidae, Amphiromidae, Eunicidae, Capitellidae, Arenicolidae, dan Acoetydae. There tedency that vegetation of mangrove progressively make abundance polychaeta very much.
STUDI KANDUNGAN LOGAM BERAT Pb DAN Cd DALAM SEDIMEN DI PERAIRAN PESISIR KECAMATAN GENUK SEMARANG Veronika, Mahda; Suryono, Chrisna Adhi; Suryono, Suryono
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.096 KB) | DOI: 10.14710/jmr.v3i1.4591

Abstract

Heavy metals; lead (Pb) and cadmium (Cd) are commonly used in the industrial sectors, including the industryof batteries, pesticides, detergents, paints, and chemical factories. Heavy metals which get into the water can damage the ecosystems and organisms in it. The aim of this study is to determine the contents of heavy metals Pb and Cd in sediments at Genuk coast waters district, Semarang. This research was conducted on October 7, November12, and December112012 at Genuk Coast Water District, Semarang. The sampling was conducted in 8 stationpoints. The method used for the analysis of heavy metals wasAtomic Absorption Spectrophotometry (AAS), while the sediment fraction was analyzed using wet sieving method in Soil Mechanics Laboratory of the Faculty of Engineering, Diponegoro University. Based on the research result, the contents of heavy metals Pb was higher compared with Cd, i.e heavy metal Pb ranging from 13,99 ppm - 38,11 ppm and heavy metal Cdranging from 0,17 ppm – 0,25 ppm, while the percentage of sediment fraction in all research stations dominated by silt fraction. The resultof correlation test has showed a positive correlation between heavy metals Pb and Cd to the grain size and organic matter in the amount of 11.4% and 49.6%.
Sebaran Thermal Front Musiman di Wilayah Perairan Selat Madura Menggunakan Single Image Edge Detection Trinugroho Trinugroho; Alfi Satriadi; Muslim Muslim
Journal of Marine Research Vol 8, No 4 (2019): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (973.655 KB) | DOI: 10.14710/jmr.v8i4.24815

Abstract

Thermal front didefinisikan sebagai pertemuan antara dua masa air dengan karakteristik suhu yang berbeda sehingga membentuk gradien suhu. Thermal front merupakan salah satu proses oseanografi penting yang dapat mempengaruhi kondisi fisik, kimia, maupun biologi di laut. Tujuan dari penelitian ini adalah untuk mengetahui sebaran thermal front musiman di perairan Selat Madura, Jawa Timur. Deteksi thermal front dilakukan pada lapisan permukaan laut dengan menggunakan citra AquaMODIS untuk suhu permukaan laut. Citra AquaMODIS yang digunakan memiliki resolusi spasial sebesar 1 km x 1 km dan resolusi temporal selama satu hari. Metode yang digunakan untuk mendeteksi fenomena ini adalah metode Single Image Edge Detection (SIED) yang diperkenalkan oleh Cayula dan Cornilon pada tahun 1992. Metode ini menggunakan prinsip deteksi tepi piksel yang mempertimbangkan nilai gradien suhu dan pola arah dari piksel yang memiliki gradien suhu. Hasil yang diperoleh berupa sebaran spasial dan temporal fenomena thermal front di perairan Selat Madura. Sebaran temporal berdasarkan komposit harian dalam satu musim selama empat tahun dari tahun 2012 – 2016. Rata – rata kejadian thermal front tiap musim sebanyak 446 kali pada musim barat, 1893 kali pada musim peralihan I, 1038 kali pada musim timur, dan 2375 kali pada musim peralihan II. Penyebab utama kejadian front di perairan Selat Madura adalah akibat adanya arus eddy dan masukan masa air laut dari wilayah timur Selat Madura. Thermal front defined as an ecounter of two water masses which has different temperature (thermal) characteristics and create a thermal gradient. Thermal front is one of the most important oceanographic proceses that can make a significant impact to physical, chemical, and biological process in the ocean. The aim of this research is to understand seasonal thermal front distribution in Madura Strait, East Java. Thermal front was detected in the surface layer of water, using AquaMODIS for Sea Surface Temperature (SST). AquaMODIS image which used in this research has 1 km x 1 km spatial resolution and one day (24 hours) temporal resolution. Front detection in this research is using Single Image Edge Detection by Cayula Cornilon (1992). This method is using edge detection of pixel, considering the value of thermal gradient and pattern of the pixel edge. The result of this research is spatial and temporal distribution of thermal front in Madura Strait. Temporal distribution are based on composite result of daily front detection in seasonal range for four years from 2012-2016. Seasonal average of front occurence is 446 times in western season, 1893 times in Transition I, 1038 times in eastern season and 2375 times in Transition II. The main cause of front in Madura strait is eddy current and water masses ecounter from eastern area of Madura.

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