Judul: Sistem Pemetaan Daerah Penangkapan Ikan Cakalang (Katsuwonus pelamis) di Perairan Prigi Jawa Timur
Abstrak: Prigi waters locates in the south of East Java is one of the potential fishing grounds in Indonesia which the main commodities are skipjack and tuna. These waters are a strategic place for trolling fishermen and either local purse seine fishermen nor fishermen who come from the outside of Prigi waters. In 2011, the production volume of tuna in Prigi fishing port is 717189 kg with production value to 6 761 309 850 IDR . In addition, the amount of fishing gear in 2011 is 86 units and purse seine is 159 units. Tuna fishing season is from June to October and peaking in August and September. But the welfare of fishermen, especially for fishermen trolling is under feasible because the benefits are low. The fishermen determine the skipjack fishing area systems with hunting and some have been using FADs and light as a tool to collect hordes. These devices are led to the arrest of a very high operating cost. Suspect in a fishing grounds skipjack in the waters of Indonesia, is already available in the form of map forecasting potential fishing grounds through the Marine Observation and Research Agency (MORA) which can be obtained free of charge on the internet. However, this facility has not been used by fishermen in Prigi because of the information displays is not match with the real conditions of fishing trolling in waters Prigi. Mapping system is a fishing area covers various aspects which increase a result of fisheries catches including tuna. These aspects include aspects of human resources, fish resources, fishing season, fishing gear technology and a fleet of fishing vessels. The objective of this study is to make the fishing grounds mapping system in Prigi Fishing Port, to evaluate the mapping systems that support skipjacks fishing grounds in the waters of Prigi and to make mapping of skipjack fishing ground in Prigi waters. Hopefully, through this research produces fishing grounds mapping system in accordance with the small-scale fisheries that can completes map forecasts that have been made by MORA. The result of the map of skipjack fishing grounds in Prigi waters which analyze with the mapping system will also be applied in other grounds of Indonesia with an adjustment to the character of each region. This study was conducted in three phases. The first phase of this study is field survey which the study was on last January 2012 in Prigi Fishing Port. The second phase is data collection of tuna catches and interviews with the fishermen from July to October 2012. The third stage is downloads the image of sea surface temperature (SST) and chlorophyll-a level 3 on the Aqua MODIS satellite which free from clouds cover and process data from the internet to get information and oceanographic parameters such as SST and chlorophyll-a which began in November 2012 to February 2013 in the Department of Utilization Fisheries Resources, Faculty of Fisheries and Marine Sciences (FFMS) Bogor Agricultural University (BAU). In addition to analyzing the catch, fish size, SST and daily chlorophyll-a, time series analyze was also carried out from January 2007
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Judul: Suatu Analisa Unit-Unit Penagkapan Ikan di Prigi, Kecamatan Watulimo Kabupaten Trenggalek Jawa Timur
Abstrak: Penelitian ini dilaksanakan pada tanggal 3 Juni sam- pai dengan 4 Juli 1983, dengan metode survei. Tujuan penelitian adalah mengetahui keadaan umum per- ikanan laut dan menentukan jumlah unit-unit penangkapan i- kan yang mungkin dikembangkan di Prigi, Kecamatan Watulimo. Dari data yang diperoleh terdapat lima jenis unit pe- nangkapan ikan di daerah penelitian yang dianalisa yaitu; purse seine, gill net, bagan, jaring tarik, pancing. Pa- da tahun 1982 tercatat jumlah kapal/perahu ikan 317 buah, jumlah alat penangkapan ikan 261 buah dan jumlah nelayan 1 850 orang. Dengan perkiraan luas perairan Prigi dan sekitarnya yang terjangkau oleh nelayan 3 549,951 km², potensi sum- 2 berdaya perikanan pelagis 3 017,458 ton/tahun telah meng- alami tingkat usaha 82,83% dari potensi lestari. Sedang- kan potensi sumberdaya perikanan demersal 2 129,971 ton/ tahun tingkat usaha baru mencapai 24,02% dari potensi lestari...
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Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model