Judul: Penggunaan Rumpon Hanyut Berumpan terhadap Hasil Tangkapan Pancing Ulur di Perairan Teluk Palabuhanratu
Abstrak: Minimnya pengetahuan teknologi nelayan pancing ulur Palabuhanratu membuat produktivitas hasil tangkapan semakin rendah, sehingga untuk meningkatkan produktivitas tersebut perlu adanya introduksi alat bantu penangkapan berupa kombinasi rumpon dan umpan. Tujuan penelitian ini yaitu membuat rancang bangun rumpon hanyut berumpan sebagai perlakuan, membandingkan komposisi hasil tangkapan pancing ulur perlakuan dan kontrol, menentukan pengaruh penggunaan rumpon hanyut berumpan, dan menentukan produktivitas pancing ulur perlakuan dan kontrol. Penelitian ini dilaksanakan di Perairan Teluk Palabuhanratu menggunakan metode experimental fishing dengan 16 trip sebagai ulangan. Hasil penelitian ini menyatakan bahwa hasil tangkapan pada pancing ulur perlakuan lebih unggul dibandingkan kontrol. Selama 16 ulangan hasil tangkapan pancing ulur perlakuan sebesar 98,67 kg sedangkan kontrol sebesar 62,34 kg. Berdasarkan hasil uji analisis Mann-Whitney perlakuan menggunakan rumpon hanyut berumpan memberikan pengaruh nyata terhadap jumlah ekor dan berat hasil tangkapan. Produktivitas pancing ulur perlakuan memiliki nilai yang lebih besar dibandingkan pancing ulur kontrol, yaitu masingmasing sebesar 6,17 kg/trip dan 3,90 kg/trip dengan persentase rata-rata produksi pancing ulur perlakuan meningkat sebesar 58,28%. Pendapatan bersih pancing ulur perlakuan sebesar Rp51.020,00 dan kontrol Rp21.416,00., The lack of technological knowledge for handline fishermen in Palabuhanratu has resulted in lower catch productivity. To increase the productivity of the hand line, it is necessary to introduce fishing aids in the form of a combination of FADs and bait. This study aimed to design and build baited drift FADs as a treatment, to compare the catch composition of treated and control handlines, to determine the effect of using baited drift FADs, and to determine the productivity of treated and control handlines. This research was conducted in the waters of Palabuhanratu Bay using the experimental fishing method with 16 trips as repetition. The results of this study stated that the catch on the treatment line was superior to the control. For 16 repetitions, the catch of the treatment line was 98.67 kg, and the control was 62.34 kg. Based on the results of the Mann-Whitney analysis test, the treatment using baited drift FADs significantly affected the number of tails and the weight of the catch. The productivity of the treated handline had a more excellent value than the control handline, which was 6.17 kg/trip and 3.90 kg/trip, respectively, with an average percentage of treated handline production increasing by 58.28%. The net income of the treatment handline was Rp51.020,00, and that of the control was Rp21.416,00.
Keyword: attractor, baited, FADs, handline, Palabuhanratu Bay

Judul: The Use of Trash Fish Diluted with Squid (Loligo spp.) Bait on Bottom Gillnet in Palabuhanratu Bay
Abstrak: Perikanan jaring rampus saat ini belum mengalami banyak kemajuan dan hasil tangkapannya yang tidak selalu meningkat. Penelitian ini bertujuan untuk membandingkan komposisi hasil tangkapan jaring rampus berumpan ikan rucah yang dilarutkan cumi dengan jaring rampus tanpa umpan, menentukan pengaruh penggunaan umpan, dan menentukan produktivitas jaring rampus perlakuan dan kontrol. Penelitian dilakukan di Teluk Palabuhanratu, Kabupaten Sukabumi, menggunakan metode eksperimental fishing dengan mengikuti operasi penangkapan selama 16 trip. Hasil tangkapan pada piece jaring rampus perlakuan sebesar 69,83 kg dan piece kontrol sebesar 42,93 kg dengan rata-rata jumlah jenis ikan pada piece perlakuan yaitu 8  0,47 sedangkan kontrol yaitu 7  0,45. Hasil tangkapan dominan pada penelitian ini adalah swanggi (Priacanthus tayenus), gulamah (Johnius trachycephalus), layang anggur (Decapterus kurroides), selar bentong (Selar crumenophthalmus), dan kakap (Lates calcarifer). Perlakuan menggunakan umpan ikan rucah yang dilarutkan cumi memberikan pengaruh nyata terhadap berat total dan jumlah ekor hasil tangkapan. Penggunaan umpan membantu kenaikan persentase produktivitas piece jaring rampus perlakuan sebesar 62,7% dengan produktivitas per-piece perlakuan lebih besar dibandingkan kontrol dengan masing-masing nilainya sebesar 1,09 kg/piece dan 0,67 kg/piece dan untuk nilai produktivitas satu piece perlakuan yaitu Rp19.181,00 sedangkan kontrol yaitu Rp6946,00 sehingga didapatkan persentase produktivitas hasil tangkapan piece perlakuan terhadap piece kontrol sebesar 176,1%., Currently, bottom gillnet fishing has not made much development, and its catches are not always increasing. This study aimed to compare the composition of the catch bottom gillnet with trash fish diluted squid bait and without bait, determine the effect of bait use, and determine the productivity of treatment and control bottom gillnet. The research was conducted in Palabuhanratu Bay, Sukabumi Regency, using experimental fishing methods by following fishing operations for 16 trips. The catch on the treated piece was 69,83 kg, and the control piece was 42,93 kg, with the average number of fish species in the treated piece was 8  0,47 while the control was 7  0,45. The dominant catches in this study were bigeye bullseye (Priacanthus tayenus), leaf tail croaker (Johnius trachycephalus), redtail scad (Decapterus kurroides), bigeye scad (Selar crumenophthalmus), and snapper (Lates calcarifer). Trash fish diluted squid bait significantly affected the total weight and number of fish caught. The use of bait helped to increase the percentage of productivity of treated net pieces by 62,7%, with productivity per treated piece more significant than the control with a value of 1,09 kg/piece and 0,67 kg/piece. The productivity value of one piece of treated was Rp19.181,00 while the control was Rp6946,00, so the percentage of productivity of the treated piece catch against the control piece was 176,1%.
Keyword: bait attractor, bottom gillnet, Palabuhanratu Bay, squid, trash fish

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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