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INDONESIA
Jurnal Segara
ISSN : 19070659     EISSN : 24611166     DOI : -
Core Subject : Science, Social,
Jurnal SEGARA (p-ISSN: 1907-0659, e-ISSN: 2461-1166) adalah Jurnal yang diasuh oleh Pusat Riset Kelautan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan (BRSDMKP), Kementerian Kelautan dan Perikanan – KKP, dengan nomenklatur baru Pusat Riset Kelautan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan, KKP dengan tujuan menyebarluaskan informasi tentang perkembangan ilmiah bidang kelautan di Indonesia, seperti: oseanografi, akustik dan instrumentasi, inderaja,kewilayahan sumberdaya nonhayati, energi, arkeologi bawah air dan lingkungan.
Arjuna Subject : -
Articles 65 Documents
THE IMPACT OF ENVIRONMENTAL CHANGING, FOOD AVAILABILITY AND ANTROPOGENIC PRESSURE ON SARDINE (Sardinella lemuru) CPUE IN BALI STRAIT WATERS Puspasari, Reny; Rachmawati, Puput Fitri; Susilo, Eko; wijopriono, wijopriono; Wiadnyana, Ngurah Nyoman
Jurnal Segara Vol 14, No 2 (2018): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v14i2.7131

Abstract

As a dominant small pelagic fishery in Bali Strait waters, significant decrease of sardine (lemuru) production was bothering fisheries industries, particularly in Muncar and Pengambengan District in East Java and Bali province.  Besides of over exploitation, changing environment condition such as temperature, salinity and thermocline depth, indicated the affect on decreasing of sardine production.  The interaction among environment variabels, food source availability (Chl-a) and anthropogenic pressure (fishing effort) generate the number of sardine abundance showed by CPUE (Catch per Unit Effort) value that determined sardine production. The current research aims to analyze the simultant impact of changing environment, food availability and antropogenic pressure on sardine CPUE.   Field research was conducted in Bali Strait where primary and secondary fisheries data were gathered at Muncar Fishing Port of Banyuwangi District East Java Province and Pengambengan Fishing Port of Jembrana District Bali Province.  Oceanography data such as temperature, salinity, and chlorophyll-a profile were collected from INDESO Model. Data analysis was done by time series analysis of each variabels such as CPUE, SST and SSTA, thermocline depth, chl-a and also the number of trip.  Partially analysis of those variabels was done by overlayed one another, and principal component analysis determined to analyze the effect of all those varibales simultaneously on sardine CPUE.  Results show that there were an influenced of regional climate phenomenon on the dynamic of environment condition of Bali Strait waters, particularly IOD (Indian Ocean Dipole).  The CPUE of sardine was determined by the interaction of environment variabels (SST/SSTA, salinity, thermocline depth), food source availabity (Chl-a) and antropogenic pressure (fishing trip) simultaneously, however SSTA gives a significant negative correlation on CPUE.  Regional climate phenomenon might cause an extreme condition in Bali strait waters leading to unstable environment for sardine habitat.  Drastically changing habitat condition occured under influenced of extreme condition would lead to disruption of sardine CPUE.
The Use of Remote Sensing and GIS Technology in Supporting Ecoregion Management Trialfhianty, Tyas Ismi; Muharram, Fajrun Wahidil; Giovanno, Aldian
Jurnal Segara Vol 13, No 2 (2017): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v13i2.6447

Abstract

Coastal areas provide great benefits for human lives. In many isolated islands, coastal ecosystem provides food and building materials extracted from coastal vegetation e.g. mangroves. Therefore, it is essential to ensure the sustainability of the coastal ecosystem. This study provides data and a map in supporting the coastal ecoregion management, by using remote sensing satellite imagery, GIS technology, and field observation. Remote sensing and GIS data were obtained from Google Earth and analysed by ArcGIS. The combination of both laboratory and field work were carried out to provide a broad picture of the coastal area in Jefman Island, Raja Ampat, West Papua. The result of this study showed various habitats and vegetation in the Jefman seabed area. It also demonstrates that the abundance and diversity of coral reef and reef fishes are the major community constructing the island, amounting 22% coral cover with 12 families and diversity index 1.20 – 2.52 for reef fish with fish density about 231 ind/50 m2. Furthermore, other communities such as seagrass, seaweed, and mangrove are also briefly explained, as they also play a greater role in supporting the whole coastal ecological system. Based on map data analysis, we found a particular area that urgently needs to be protected. Remote sensing and GIS technology were found useful to help the manager to design coastal management strategies in the future.   
Kajian Kualitas Air Untuk Wisata Bahari Di Pesisir Kecamatan Moyo Hilir Dan Kecamatan Lape, Kabupaten Sumbawa Saraswati, Ni Luh Gede Rai Ayu; -, Yulius; Rustam, Agustin; Salim, Hadiwijaya L.; Heriati, Aida; Mustikasari, Eva
Jurnal Segara Vol 13, No 1 (2017): April
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v13i1.6421

Abstract

Perairan teluk Saleh memiliki keanekaragaman hayati laut yang berpotensi sebagai obyek wisata bahari. Keberadaan keanekaragaman hayati laut tersebut tidak terlepas dari kondisi kualitas perairan sebagai penunjang kehidupan organisme akuatik sebagai obyek dari wisata bahari. Oleh karena itu, penelitian terhadap analisis kualitas air untuk wisata bahari di teluk Saleh diperlukan. Penelitian ini dilakukan pada 8-10 Mei 2015 di teluk Saleh, Kabupaten Sumbawa dengan mengambil sebanyak 29 lokasi stasiun pengamatan. Pengambilan data kualitas perairan dilakukan secara purposive sampling dengan menggunakan alat multiparameter WQC-24. Parameter yang diukur diantaranya adalah kecepatan arus, kecerahan, kekeruhan, suhu, pH, salinitas dan DO. Analisis data dilakukan secara deskriptif dan menggunakan analisa PCA (Principal Component Analysis). Hasil pengukuran menunjukan bahwa nilai kekeruhan (pada stasiun 25 dan 50), fosfat dan nitrat melebihi baku mutu Kepmenneg LH no 51 tahun 2004 Lampiran II dengan nilai rata-rata berturut-turut 20,5 NTU; 0,074 mg/L; dan 8,4 mg/L. Secara keseluruhan perairan teluk Saleh tergolong baik dan cocok sebagai kawasan wisata bahari. Berdasarkan analisis PCA diperoleh parameter yang berperan kuat di lokasi adalah konduktivitas, salinitas, suhu, kecepatan arus dan kekeruhan.
BUKTI LANGSUNG INTERAKSI PERDAGANGAN DI KEPULAUAN RIAU; STUDI PADA SITUS ARKEOLOGI BAWAH AIR DI PULAU NATUNA DAN PULAU BINTAN Adhityatama, Shinatria; Sulistyarto, Priyatno Hadi
Jurnal Segara Vol 14, No 3 (2018): Desember
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v14i3.7348

Abstract

Kepulauan Riau merupakan salah satu pintu gerbang masuknya para pedagang internasional ke Nusantara. Kepulauan ini memiliki sejarah maritim yang panjang, dan aktivitas perdagangan global terekam secara baik di kawasan ini dengan ditemukannya situs-situs arkeologi salah satunya situs kapal karam dan barang komoditasnya. Kapal karam merupakan bukti langsung secara arkeologi untuk merekonstruksi aktivitas pelayaran laut. Dari temuan kapal karam kita dapat mempelajari teknologi struktur kapal itu sendiri, navigasi laut dalam jalur perdagangan, interaksi budaya, serta jenis komoditas yang dipasarkan di Perairan Nusantara secara khusus. Kerajaan-kerajaan Melayu berkembang pesat seiring makin ramainya aktivitas perdagangan di Laut Cina Selatan dan Selat Malaka. Data arkeologi menunjukkan pedagang-pedagang dari India, Arab, Persia, bahkan Eropa telah singgah dan beraktivitas di perairan Kepulauan Riau. Para ahli pun berpendapat bahwa Perairan Laut Cina Selatan hingga Selat Malaka tidak kalah ramainya dengan perairan Mediteranian. Hal ini tergambar pada situs-situs arkeologi bawah air yang berada di Perairan Pulau Natuna dan Pulau Bintan. Kedua pulau ini hingga sekarang memiliki peran yang signifikan bagi aktivitas pelayaran dan perdagangan di Indonesia. Aktivitas perdagangan masa lalu tersaji dengan sangat baik di situs-situs arkeologi bawah air di perairan kedua pulau tersebut. Namun, aktivitas penjarahan juga terus terjadi pada situs-situs arkeologi bawah air sehingga memunculkan diskusi mengenai perlunyadikembangkan model pelestarian yang aman untuk situs arkeologi bawah air di Kepulauan Riau agar masyarakat dapat menerima manfaatnya.
ANALISIS KESESUAIAN DAN DAYA DUKUNG PERAIRAN UNTUK PENGEMBANGAN BUDIDAYA RUMPUT LAUT DI KABUPATEN SIMEULUE, ACEH Radiarta, I Nyoman; Erlania, Erlania; Haryadi, Joni
Jurnal Segara Vol 14, No 1 (2018): April
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v14i1.6626

Abstract

Rumput laut merupakan salah satu primadona produksi perikanan budi daya di Indonesia. Ektensifikasi lokasi budi daya rumput laut telah menyebar sampai ke pulau-pulau terdepan Indonesia. Perluasan kawasan ini harus didukung oleh ketersediaan data dan informasi yang akurat tentang kesesuaian perairan lokasi budi daya. Penelitian ini bertujuan untuk melakukan analisis spasial kesesuaian dan daya dukung perairan untuk pengembangan budi daya rumput laut di Kabupaten Simeulue, Aceh. Penelitian dilaksanakan pada Agustus 2015, dan berlokasi di tiga teluk besar yaitu Teluk Sibigo, Teluk Dalam, dan Teluk Sinabang. Analisis spasial kesesuaian lahan dilakukan dengan sistem informasi geografis berdasarkan multi criteria evaluation dengan menggabungkan tiga submodel yaitu fisik dan geografi, kualitas air, dan sosial infrastruktur. Daya dukung kawasan dihitung dengan pendekatan kapasitas unit budi daya di perairan tersebut. Hasil analisis menunjukkan bahwa ketiga teluk memiliki potensi pengembangan dengan luasan yang bervariasi: 159 ha (Teluk Sibigo), 808 ha (Teluk Dalam), dan 684 ha (Teluk Sinabang). Perhitungan daya dukung menunjukkan bahwa Teluk Dalam mempunyai kapasitas yang terluas yaitu 494,7 ha. Pemanfaatan kawasan secara maksimal dapat mencapai produksi berkisar antara 723-3030 ton/siklus tanam. Kesesuaian lahan (zonasi) dan daya dukung perairan yang dihasilkan dalam penelitian ini dapat dijadikan landasan penting mendukung penerapan budi daya perikanan yang berbasis ekosistem.
Desain dan Layout Tambak Garam Semi Intensif Skala Kecil di Lahan Terbatas Bramawanto, Rikha
Jurnal Segara Vol 13, No 3 (2017): Desember
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v13i3.6495

Abstract

Tambak garam rakyat di Indonesia pada umumnya dikelola dalam ukuran kecil, di Jawa Barat dan Pulau Madura hanya berkisar antara 0,3 sampai 1,7 hektar/orang dengan musim produksi hanya berkisar antara 3,5 – 4 bulan. Pola pengelolaan secara konvensional menjadi sebab belum optimalnya produksi garam rakyat, khususnya pada aspek kualitas. Hal tersebut membuat kehidupan petambak selama setahun belum dapat tercukupi, terutama untuk petambak garam sistem sewa atau bagi hasil. Petambak garam skala kecil membutuhkan solusi alternatif untuk meningkatkan produktivitasnya. Beberapa informasi eksisting seperti luas pengelolaan per orang dan produktivitas tambak, biaya produksi dan harga garam dijadikan dasar untuk menentukan target jumlah produksi dan kebutuhan luas lahan rasional sehingga dapat dibuat suatu desain dan layout tambak garam yang ideal dan ekonomis. Target penerimaan total minimal Rp 41.512.336,- dapat dicapai melalui produksi 100 ton garam per tahun. Berdasarkan perhitungan kesetimbangan massa air tua (brine), untuk memproduksi 100 ton garam dibutuhkan 5.000 m3 air laut dan luas lahan sekitar 1 hektar dengan rasio reservoir : condenser1 : condenser2 : meja kristalisasi  adalah 1 : 5 : 1.7 : 1.7. Luas tambak tersebut masih memungkinkan untuk 8 siklus produksi, yaitu 1 siklus awal dan 7 siklus masa pungut garam setiap 10 hari pada kondisi musim kemarau normal. Desain layout ini merupakan hasil perhitungan dan simulasi, namun masih perlu dilakukan penerapan dan pengujian pada skala percobaan maupun skala yang sesungguhnya untuk mengetahui efektifitas desain dan layout tambak garam semi intensif.
The Suitability Of Coastal Area Development Based On Minawisata Concept in Pacitan District Amri, Syahrial Nur; Arifin, Taslim
Jurnal Segara Vol 13, No 2 (2017): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v13i2.6441

Abstract

Minawisata concept is the implementation and integration of efforts to optimize the utilization of marine and coastal resources with action to maintain the sustainability and value of sustainability. This study aimed to determine the suitability of the coastal land development in Pacitan District based on the potential of marine and coastal areas in accordance to the minawisata concept. Study area covered seven districts along the coastline of Pacitan District, East Java Province, namely Donorejo, Pringkuku, Pacitan, Kebonagung, Tulakan, Ngadirejo, and Sudimoro District. The methodology used in this study is a combination of Geographic Information Systems analysis, satellite imagery interpretation, and field data processing. This study is limited to the identification of the potential of marine and coastal area, the suitability of land use, and the suitability of coastal area development based on the minawisata concept. The results show that there are three dominant utilizations of marine and coastal areas in Pacitan District, including: Marine Aquaculture, Capture Fisheries, and Beach Tourism. Based on the analysis on suitability of the marine and coastal area, seven districts in Pacitan are suitable for fisheries and beach tourism, while only two districts were suitable for marine aquaculture with several conditions, namely Pacitan District and Ngadirejo District. The implementation of minawisata concept for coastal area suitability based on the analysis of seven identified districts is feasible for further development.
MODELING TIDAL CURRENT OF BANTEN BAY DURING TRANSITIONAL MONSOONS 2015-2016 Bayhaqi, Ahmad; Wisha, Ulung Jantama; Surinati, Dewi
Jurnal Segara Vol 14, No 2 (2018): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v14i2.6452

Abstract

Hydrodynamic condition of Java sea as a part of Indian-Pacific throughflow system influenced by monsoon will affect the condition of Banten Bay such as tidal current. Bordered by Java Sea makes Banten Bay preoccupied with fisheries and shipping activities, so the information regarding current pattern that is tidal current is very necessary. This study aims to simulate the tidal current pattern using flow model fm as a numerical approach. Two-dimensional hydrodynamic model was employed to perform the simulation of tidal current. Model was validated by using current and tidal observation data which was taken on September 2015 and April 2016. The result shows that the current moves southwestern toward the land during high neap and high spring tidal conditions ranged 0 - 0.142 m/s at the first transitional monsoon and 0 - 0.153 m/s at the second transitional monsoon respectively. During low spring tidal condition for both transitional monsoons, the current flowed northwestward on west side and northeastward on east side within the bay ranged 0 - 0.137 m/s and 0 - 0.127 m/s respectively. The hydrodynamic conditions of Banten Bay are slightly different between 2 transitional seasons, especially for the current speed and direction. Those conditions induce a different transport mechanism, resulting in unstable accretion and abrasion along Banten Bay coast.
THE ANALYSIS OF TIDAL CURRENT IN SURAMADU BRIDGE PIER FOR MARINE POWER GENERATION TEST SITE Nugraha, R. Bambang Adhitya; Erwandi, Erwandi; Syahputra, Hendry; Nurman Mbay, La Ode
Jurnal Segara Vol 14, No 2 (2018): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v14i2.6644

Abstract

Recently, the interest in renewable ocean energy has been
growing rapidly among the ocean researchers in Indonesia. In
this paper, the pattern of tidal current in Madura Strait was analyzed and it is used as First
we present the general information of the structure of
Suramadu Bridge and explain the purpose of installing tidal current turbine between its piers. Second, we develop the numerical model of Madura Strait. The bottom topography of Madura Strait is digitized from bathymetry map produced by Indonesian Navy. A nested hydrodynamic model has been developed to refine the specific area of interest around the piles of the Suramadu Bridge. MIKE-21 program is then employed to simulate the tidal current that passes between the piles of the bridge. Next, we validate the model by conducting the field measurement of the speed of tidal current between pile no. 56 and pile no. 57. We deployed ADCP and measured the current speed for 15 days. The obtained data is then compared with the numerical model. The results show that the simulated currents has similar pattern with the measured data. We also discuss the characteristics of the simulated tidal current comparing with the ADCP results. Finally we estimate the possible produced power produced from the kinetic energy of the predicted tidal current of hydrodynamic.
Characteristics of Marine Litters in the West Coast of Bali Husrin, Semeidi; Wisha, Ulung Jantama; Prasetyo, Rahmadi; Putra, Aprizon; Attamimi, Adli
Jurnal Segara Vol 13, No 2 (2017): Agustus
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v13i2.6449

Abstract

Kuta beach in Bali is a world-famous tourist destination has been suffering from marine litters (or debris) disaster almost every year. Mitigation efforts have been carried out by the local government started from educating the people as well as continuing mass cleaning campaigns for the stranded litters in the beach. The research has an objective to understand the physical processes of marine debris characteristics in Kuta such as its propagation and distribution along the coastline and in the water columns during the two different seasons (West Monsoon and Transitional seasons). A hydrodynamic model was developed to investigate the transport of marine litters from their sources by considering the tide-driven surface currents and wind. Field surveys were also conducted to assess marine litter’s characteristics in the surface and in the sea beds for both plastic and wood types of litters. Hydrodynamic simulation shows that the surface current ranging from 0.05 – 1.75 m/s is capable of transporting marine surface debris from Bali Straits and other sources in the South of Bali to Kuta during West Monsoon season. The collected litters during the West Monsoon season were four times larger in quantity. The concentration of litters in the seabed and in the water column is larger near to the coastline than further offshore. In the meantime, during Transitional season, Kuta was completely free from marine litters. Results from surveys also showed that the most effective measures for marine litters in Kuta is self-awareness of the people to keep the environment clean.