Judul: Impact of Portable FAD Operation on Social Conflict, Productivity and Composition of Fish Size in Hand-line Fishing
Abstrak: Pancing ulur merupakan salah satu alat tangkap yang banyak digunakan di Kepulauan Seribu, khususnya di Pulau Panggang. Namun, Ketidaktersediaan informasi daerah penangkapan ikan berakibatkan rendahnya hasil tangkapan pancing ulur. Hal ini dapat berdampak terhadap rendahnya produktivitas tangkapan dan degradasi daerah penangkapan ikan. Penggunaan teknologi rumpon portable diharapkan dapat menciptakan daerah penangkapan ikan dan mengantisipasi timbulnya degradasi daerah penangkapan ikan. Penelitian ini bertujuan untuk mengidentifikasi persepsi nelayan terhadap penggunaan rumpon portable, menghitung produktivitas dan menganalisis kelayaktangkapan ikan serta menganalisis dampak pengoperasian rumpon portable dalam perikanan pancing ulur. Metode penelitian dilakukan dengan wawancara dan kegiatan experimental fishing sebanyak 16 trip. Hasil penelitian menunjukkan bahwa 50% nelayan memiliki persepsi positif, 40% netral dan 10% tidak setuju terhadap penggunaan rumpon portable. Produktivitas pancing ulur di sekitar rumpon portable sebesar 2,018 kg/trip, dan tanpa rumpon 1,841 kg/trip. Hasil tangkapan pancing ulur di sekitar rumpon portable menunjukkan 62,60% layak tangkap dan 37,40% tidak layak tangkap sedangkan tanpa rumpon 58,93% layak tangkap dan 41,07% tidak layak tangkap. Penggunaan rumpon portable memiliki keunggulan diantaranya: produktivitas tangkapan yang banyak, jenis tangkapan beragam, dan komposisi ikan kategori layak tangkap yang banyak. Namun, sebagian besar (60%) nelayan beranggapan bahwa adanya sikap kecemburuan sosial oleh nelayan tanpa rumpon terhadap nelayan pengguna rumpon., Hand lines is one of the fishing gear that is widely used in the Seribu Islands, especially on Panggang Island. However, the unavailability of information on fishing grounds resulted in low hand line catches. This can have an impact on low catch productivity and degradation of fishing grounds. The use of portable FAD technology is expected to create artificial fishing grounds and anticipate the onset of degradation of fishing grounds. This study aims to identify fishermen’s perceptions of the use of portable FAD, calculate the productivity and analyze sustainability of fish and analyze the impact of operating portable FAD in Hand line fisheries. The research method was conducted with interviews and experimental fishing activities as many as 16 trips. Research shows that 50% of fishermen have a positive perceptions, 40% are neutral and 10% disapprove of the use of portable FAD. The productivity of hand lines around the portable FAD is 2.018 kg/trip, and without portable FAD 1.841 kg/trip. The catches of hand lines around portable FAD showed 62.60% were eligible for capture and 37.40% were not eligible for capture, while without portable FAD 58.93% were eligible for capture and 41.07% were not eligible for capture. The use of portable FAD has advantages includes the productivity of many catches, the type of catch varies, and the composition of fish categories eligible for capture a lot. However, the vast majority (60%) of fishermen think that there is an attitude of social jealousy by fishermen without FAD towards fishermen who use of FAD.
Keyword: degradation, Fishing ground, Hand line, Portable FAD

Judul: EFFECT OF PORTABLE FAD ON THE OPERATION PURSE SEINE IN TEGAL WATERS
Abstrak: Tegal merupakan Kabupaten di Jawa Tengah yang memiliki kekayaan sumber daya perikanan yang baik. Terdapat banyak perairan yang memiliki potensi sumber daya yang melimpah salah satunya yaitu perairan Larangan. Alat tangkap yang biasa digunakan untuk kegiatan penangkapan yaitu payang dan purse seine. Seiring berjalannya waktu, mulai bermunculan berbagai masalahan yang dihadapi, salah satunya yaitu hasil tangkapan yang tidak menentu dan cenderung mengalami penurunan. Mengetahui hal tersebut, maka diperlukan alat bantu penangkapan perikanan, yang mudah diaplikasikan dan tentunya dapat meningkatkan hasil tangkapan nelayan, yaitu rumpon portable. Tujuan penelitian ini adalah membandingkan komposisi, menghitung produktivitas, dan menjumlahkan pendapatan dari hasil tangkapan dengan rumpon portable dan tanpa rumpon portable. Metode yang digunakan adalah experimental fishinig. Total ikan yang tertangkap pada penelitian kali ini berjumlah 11 spesies, yaitu barakuda, golokgolok, gulamah, kembung, selar bentong, tembang, tenggiri, teri jawa, tongkol, cumi, dan udang, dengan bobot keseluruhan 18.231,2 kg pada hasil tangkapan dengan rumpon portable, dan 16.743,9 kg pada hasil tangkapan tanpa rumpon portable. Nilai produktivitas rata-rata penangkapan dengan rumpon portable didapat sebesar 1.139,45 kg/trip, lebih tinggi dari hasil tangkapan tanpa rumpon yaitu sebesar 1.046,49 kg/trip. Pendapatan nelayan dari penjualan hasil tangkapan dengan rumpon portable lebih tinggi dibandingkan dengan penjualan hasil tangkapan tanpa rumpon portable., Tegal is a regency in Central Java which has a wealth of good fishery resources. There are many waters that have abundant resource potential, one of which is Larangan waters. The fishing gear commonly used for fishing activities are payang and purse seine. As time went on, various problems began to emerge, one of which was the catch which was erratic and tended to decrease. Knowing this, we need fishing aids, which are easy to apply and of course can increase fishermen's catches, namely portable FADs. The purpose of this study was to compare composition, calculate productivity, and add up the income from catches with portable FADs and without portable FADs. The method used is experimental fishing. The total fish caught in this study amounted to 11 species, namely barracuda, machetes, gulamah, mackerel, selar bentong, tembang, mackerel, Javanese anchovies, tuna, squid and shrimp, with a total weight of 18.231.2 kg in the catch. with portable FADs, and 16.743.9 kg in catches without portable FADs. The average productivity value for catching with portable FADs was 1.139,45 kg/trip, higher than the catch without FADs, which was 1.046,49 kg/trip. Fishermen's income from selling catches with portable FADs is higher than selling catches without portable FADs.
Keyword: hasil tangkapan, pendapatan, produktivitas, purse seine, rumpon portable

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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