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: Potensi Sumber Daya Ikan Selar Kuning, Tembang, dan Tongkol di Selat Sunda yang Didaratkan di PPP Labuan, Banten
Abstrak: Pelagic fishery potential in the Sunda Strait is the highest compared to other fisheries. The dominant pelagic fish caught were yellowstripe scad, fringescale sardinella, and thonine orientale. Pelagic fish is a economic important, that facing arrest are increasing every year and it is feared to overfishing. The aims this study are to assess the utilization condition of pelagic fish in PPP Labuan, Banten especially about biological and economic aspects. The method used to determine potential is through the selection correctly of surplus production. Maximum sustainable yield (MSY) and maximum economic yield (MEY) are 1875.02 ton/year dan 1874.71 ton/year for yellowstripe scad, 3311 ton/year dan 3303 ton/year for fringescale sardinella, also 1721.17 ton/year and 1710.64 ton/year for thonine orientale. Actual catche efforts of yellowstripe scad, fringescale sardinella, and thonine orientale has greater than optimum efforts, so that indicated has been biological and economic overfishing. Economic rent on the actual condition of the third kind of fish is lower than the economic rent of MSY and MEY conditions. This condition can be caused by the rate exploitation of the three kinds of fish exceeding the optimum exploitation (> 0.5) so it had overexploited. Economic rent on the actual condition is lowest because degradation of the fish resources has increased every year. The better utilization is MEY condition because these have maximum benefit. Management plan of pelagic fish in PPP Labuan are reduction fishing effort, selectivity of fishing gear, and setting size of the fish can be caught.
Keyword: Sunda Strait., pelagic fish, overexploited, exploitation rate, degradation rate

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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