Judul: Pengelolaan Perikanan Handline Tuna Skala Kecil di Pulau Buru.
Abstrak: Perikanan handline tuna merupakan aktivitas masyarakat nelayan di Pulau Buru yang tersebar di desa-desa pesisir di Kabupaten Buru dan Kabupaten Buru Selatan. Perikanan handline tuna di Pulau Buru, termasuk dalam kategori perikanan skala kecil, dengan karakteristik, ukuran armada dibawah 5 GT, merupakan usaha informal, dengan modal yang terbatas dan dikelola pada skala rumah tangga nelayan. Terdapat sekitar lebih dari 1600-an nelayan yang berpartisipasi secara langsung dalam aktivitas ini sebagai mata pencaharian, sumber pendapatan, pemenuhan kebutuhan pangan secara langsung maupun tidak langsung, menunjang tradisi dan budaya, penyedia lapangan kerja dan penunjang ekonomi lokal dan regional. Walaupun demikian, perikanan ini belum sepenuhnya mendapat perhatian dengan baik terkait program dan kebijakan pengelolaan perikanan, hal ini disebabkan adanya keterbatasan informasi tentang sektor ini, kontribusi produksi mereka tidak diketahui dengan baik, sehingga sering diabaikan, selain itu pemahaman yang sedikit tentang kondisi sosio ekonomi perikanan ini menyebabkan perhatian terhadap keberlanjutan mata pencaharian nelayan sangat rendah, padahal disaat yang bersamaan sektor perikanan skala kecil merupakan sektor yang sangat rentan, diperhadapkan oleh keterbatsan sumber daya ikan, perubahan iklim dan cuaca, tuntutan pasar, guncangan ekonomi, bencana alam dan non alam, keterbatasan modal finansial, keterbatasan sarana dan infrastruktur, akses pasar yang terbatas dan seringkali termarjinalkan dalam program pembangunan. Perikanan handline tuna di Pulau Buru diperhadapkan dengan kondisi sebagaimana diuraikan sebelumnya. Untuk itu penelitian ini dilakukan dengan tujuan untuk (1) mengetahui produksi hasil tangkapan handline tuna di Pulau Buru, (2) menilai kondisi sosioekonomi perikanan handline (3) menilai keberlanjutan mata pencaharian nelayan, dan (4) menyusun model pengelolaan berikanan handline tuna skala kecil di Pulau Buru. Penelitian dilaksanakan mulai bulan Maret 2020 sampai Agustus 2020 di Kabupaten Buru dan Buru Selatan. Data penelitian terdiri atas data primer dan data sekunder. Data primer diperoleh melalui survei/observasi langsung, wawancara dan diskusi kelompok kecil pada saat penelitian. Data sekunder diperoleh dari instansi pemerintah dan swasta secara resmi. Metode analisis yang digunakan dalam penelitian ini adalah analisis upaya dan hasil tangkapan, analisis sosio ekonomi, analisis FLIRES Check (Fisheries Livelihoods Resilience Check) yang menggunakan analisis RAPFISH dengan pendekatan SLA, dan metode sintesis. Hasil penelitian menunjukkan bahwa upaya penangkapan armada handline tuna bervariasi di antara lokasi pendaratan di Pulau Buru dengan kisaran 20 hari kapal per bulan sampai dengan 825 hari kapal per bulan. Sedangkan produksi total hasil tangkapan handline tuna berdasarkan kategori wilayah pendaratan di Pulau Buru berkisar antara 497,50 kg/bulan di lokasi pendaratan kecil sampai dengan 28.615,5 kg/bulan di pendaratan besar. Hasil penelitian menunjukkan kondisi sosio ekonomi di lokasi penelitian bahwa sekitar lebih dari 1600-an nelayan yang bekerja dalam perikanan handline tuna secara langsung. Penerimaan rata-rata armada handline tuna di Pulau Buru pada tahun 2020 berkisar Rp 484.544 sampai Rp 1.108.733 (Rp 702.243) lebih kecil dari tahun 2019 yang berkisar Rp 671.293 sampai Rp 1.890.876 (Rp 1.186.287) yang menunjukkan penurunan laba mulai dari 27,82% hingga 50,32%; jika dibandingkan dengan keuntungan pada tahun 2019. Pendapatan setiap nelayan handline tuna per trip berkisar antara Rp 120.304 hingga Rp 206.079 ( Rp 180.586) lebih rendah dibandingkan tahun sebelumnya yang berkisar Rp 325.099 hingga Rp 658.833. Keberlanjutan mata pencaharian nelayan handline tuna di Pulau Buru, berdasarkan analisis FLIRES Check, statusnya kurang berkelanjutan pada
Keyword: Buru Island, handline, livelihoods, socio-economic

Judul: Tuna fisheries management strategies in an optimal and sustainable in Buru District, Maluku Province
Abstrak: Tuna fishery is one of the leading sectors of fisheries in Buru District. This fishery has been going on a few years ago, and an artisanal fisheries that have evolved from the subsistence fisheries to commercial fisheries. This sector is a significant contribution to meeting the needs of food, employment, public welfare, and the development of regional economy. Sustainability of these contributions, depending on the management of the fishery. Good fisheries management is to ensure the sustainability of the fish resources, environmental, socio-economic, and institutional aspects. To carry out the management approach, it takes a variety of information such as biology, ecology, socio-economic and institutional information, as an evaluation, improvisation, and execution management. This study was conducted as an attempt to provide such information . The purpose of this study was to : (1) analyzing the condition of tuna resources in Buru District which includes estimates of potential maximum sustainable yields and some population parameters, (2) to analyze the feasibility of tuna fishing units, (3) optimization of the allocation of fishing effort, and (4) formulate strategies for optimal and sustainable management of tuna fisheries in Buru District . Surplus production model (SPM) was used to assess the maximum sustainable yield of tuna fish resources. Some parameters of tuna populations known with length and weight analysis, the pattern of growth, mortality rate and exploitation rate. Feasibility of tuna fishing units were analyzed using financial feasibility analysis, which consists of business analysis and investment criteria analysis. Business analysis include: analysis of revenue, revenue cost ratio (R/C), payback period (PP) and the break-even point (BEP). Analysis of investment criteria include the net present value (NPV), internal rate of return (IRR) and net benefit cost ratio (Net B/C). Optimization of the allocation of fishing unit, calculated using a linear goal programming (LGP). Formulation and prioritization of management strategies performed with strength weakness opportunity threath analysis (SWOT), and analysis of quantitative strategic planning matrix (QSPM). Maximum sustainable yield of tuna fish resources in Buru District estimated at about 867 tons/year, with optimum fishing effort is at 1101 units/year. Fork length and weight of tuna fish caught that ranged from 85.5 to 170.8 cm (L = 180.6 cm) and 12.0 to 91.8 kg, with a range of ages 1–6 years, fishing mortality enough high, with the rate of exploitation between the years 2010–2011 has exceeded the optimum exploitation rate in the range 65% –74%, where the actual fishing effort exceeds the optimum fishing effort. Feasibility analysis of the three categories handline units conducted with business analysis and analysis of investment criteria, showed that handline units that has a good business feasibility is, the first, handline unit 5.5 HP with an annual profit of Rp10 710 407, revenue cost ratio (R/C) > 1, the payback period is 1.30 years, the value of BEP is Rp15,485,903 or 939.88 kg, with NPV value is Rp42,714,374 > 0 , IRR (84.6%) > 12% and Net B/C (4.06) > 1. Second, handline unit 15 HP with an annual profit of Rp15,164,117, revenue cost ratio of 1.14, the payback period is 2.37 years ,
Keyword: Buru District, management strategies, optimal and sustainable, tuna fisheries

Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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