Judul: Analysis of Potential Fishing Ground In Bangka Waters
Abstrak: Suhu permukaan laut merupakan indikasi umum yang mudah diteliti dengan teknik penginderaan jauh yang dapat digunakan untuk mengetahui pola distribusi SPL secara horizontal, sehingga fenomena front dapat diketahui. Konsentrasi fitoplankton dapat diidentifikasi dari citra Sea WiFS, fitoplankton sangat menentukan besarnya produktivitas primer perairan. Fenomena oseanografi yang dapat diamati melalui teknologi penginderaan jauh antara lain thermal front karena merupakan perangkap bagi zat hara dari kedua massa air yang bertemu sehingga merupakan feeding ground bagi ikan pelagis dan merupakan fishing ground bagi nelayan. Suhu rata-rata bulan April 28,5�C, thermal front berada di sebelah barat bagian atas pulau Bangka dan thermal front juga terdapat di bagian timur pulau Bangka tetapi, suhu thermal front dibagian timur lebih rendah dari sebelah barat. Bulan Juli terdapat sedikit daerah thermal front jika dibandingkan dengan bulan-bulan sebelumnya dengan kisaran suhu 28-29�C yang menyebar secara merata. Bulan Agustus dengan kisaran suhu dominan 2930�C, SPL dibagian timur lebih dominan tinggi dari sebelah timurnya, sedangkan untuk bulan September suhu relatif rendah. Hasil tangkapan ikan menggunakan indikator alat tangkap gillnet., The objective of this research is to assess the potential fishing ground based on the oceanographic phenomena such as thermal front in Bangka waters and its surroundings by using NOAA/AVHRR data. To analyze the existences of Potential Fishing Ground, therebare five data categories, i.e: NOAA-16/AVHRR, Sea WIFS, Indonesian Current Map, Indonesian Wind Maps, Fishing Catch Data, that take into account. The location of this research, geographycallys, which is lay on 105-107 E and 1°20'-3'7' S. Sea surface temperature (SST) is estimated from NOAA-16/AVHRR data by using Mc.Milin and Crosby's algorithm. Isotherms of SST distribution maps is used to locate the upwelling and the thermal front area and by overlaying with location of fishing grounds and catchs maps the area potential fishing ground is assessed. The result of the research showed that the distribution pattern of sea surface temperature in Bangka waters is around 24°C -28,5°C. Furthermore, according to fishing activity from the fishermen during May and October indicated that the potential fishing ground through this period highly related to the temperature between 24°C-26°C and the current between 1-2 m/s. There is no indicatioan of occuance upwelling in area studied; the fotential fishing grounds are locate in the high leapsaline side of the thermal front; wich are most the cases also the water massurs of low salinity
Keyword: Fishing ground, Feeding ground

Judul: The Potential Fishing Area in the Sunda Strait Based on the Intensity of Fishing
Abstrak: Perairan Selat Sunda memiliki potensi sumberdaya perikanan yang tinggi dan menjadi salah satu lokasi kegiatan perikanan tangkap baik ikan pelagis maupun demersal. Tujuan dari penelitian ini adalah menganalisis daerah potensial penangkapan ikan pada perairan Selat Sunda dengan melakukan pemetaan daerah penangkapan eksisting di Selat Sunda, pendataan hasil tangkapan sebagai profil biologi perikanan, identifikasi musim penangkapan dan sebaran oseanografi. Analisis data terdiri atas pemetaan jalur penangkapan ikan nelayan, jenis dan ukuran ikan tangkapan, ukuran pertama kali matang gonad, pola musim penangkapan, suhu permukaan laut dan klorofil-a. Penelitian dilakukan pada bulan September sampai Desember 2019 dengan lokasi pengambilan data di wilayah penangkapan ikan Selat Sunda serta PPP Labuan dan PPP Lempasing. Umumnya ikan-ikan yang ditangkap oleh para nelayan di Selat Sunda cenderung berasal dari daerah disekitar pesisir, pulau-pulau kecil serta teluk. Hasil dari penelitian menunjukkan bahwa terdapat wilayah-wilayah potensial lainnya berdasarkan rentang nilai rata-rata suhu permukaan laut dan klorofil-a pada jalur penangkapan yang dilalui karena memiliki hubungan dengan hasil tangkapan ikan., Sunda Strait has high potential fishery resources and locations for fishing activities for both pelagic and demersal fish. This research aims to spatial analyse the waters of the Sunda Strait by collecting data on fish capture, identifying the changes of capture fish pattern area, and mapping the potential fishing areas. The data analysis consists of the type and size of the captured fish, first size mature gonad and capture, fishing season patterns and the sea surface temperature. This research was conducted from September to December 2019 with data collection in PPP Labuan and PPP Lempasing. Usually, fishermen’s the capture fish by fisherman in the Sunda Strait is from several fishing areas, including Lada Bay, Panaitan Island, Krakatau Island, Sebesi Island, Sebuku Island, and Legundi Island. The result shows that high fishing efforts occurred in areas close to the coast, small islands, and bays in the Sunda Strait. Fishery Management efforts must be created by considering sustainability for the long term.
Keyword: Cartography, Chlorophyll-a, Potential fishing area, Sunda Strait, Sea surface temperature

Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
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