Judul: Keragaan Kapal Tuna Longline Samudera Jaya Sebelum dan Setelah Kenaikan Harga BBM di PPN Palabuhanratu
Abstrak: One of the prime commodities from Palabuhanratu national fishing port is tuna. Fishermen in Palabuhanratu often use tuna longline as fishing gear to catch tuna. In tuna longline fisheries, the fishermen need a large number of investment and fuel for tuna longliner. During 2007 – 2011 period, fuel price increased in 2008. The rising fuel price has negative effects on daily life. This research has purposes to know the decreasing number of tuna longliners, tuna longlines and the fishermen during 2007 – 2011 and to analyze the performance of tuna longliner by using feasible analysis. All primary data is derived from questionnaire and interview and secondary data is derived from literature study. The result of this research were the number of tuna longline fishermen and tuna longliners which were based on PPN Palabuhanratu decreased by 2,35% and 2,55% per year. But, the number of tuna longlines increased 31,12% per year. Based on feasible analysis of tuna longliner named Samudera Jaya, IRR rate was 20%, Net B/C ratio was 2,47, and the NPV was Rp 486.927.481. It can be showed that tuna longline was still feasible and worth in fisheries business.
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Judul: Valuation of sustainable tuna fisheries resources landed archipelagic fishing port of Palabuhanratu, West Java
Abstrak: Pelabuhan Perikanan Nusantara Palabuhanratu merupakan pelabuhan perikanan terbesar yang terletak di Pantai Selatan Jawa Barat. Wilayah perikanan ini memiliki potensi sumberdaya ikan tuna yang besar. Alat tangkap yang digunakan untuk menangkap ikan tuna di lokasi penangkapan Palabuhanratu Jawa Barat adalah tuna longline dan pancing tonda. Penelitian ini bertujuan untuk menentukan usaha penangkapan yang efektif, pengelolaan perikanan tuna yang optimal, serta menentukan nilai Willingness to Pay (WTP) perikanan tuna di PPN Palabuhanratu, Jawa Barat. Upaya penangkapan dengan menggunakan tuna longline lebih efektif dibandingkan dengan pancing tonda. Pada tuna longline upaya penangkapan sebanyak 815 trip menghasilkan 3438,76 ton ikan, sedangkan pancing tonda dengan upaya penangkapan sebanyak 955 trip hanya menghasilkan 450,02 ton ikan. Pengelolaan MEY memiliki keuntungan yang tinggi sebagai tujuan pengelolaan perikanan yang optimal dibandingkan dengan MSY. Pada kondisi MEY, upaya penangkapan yang rendah justru menghasilkan rente ekonomi yang paling tinggi, yaitu senilai Rp 103.776.376.924,65 untuk tuna longline dan Rp 102.087.274.480,96 untuk pancing tonda. Nilai Willingness to Pay (WTP) konsumen perikanan tuna senilai Rp 30.232 dan surplus konsumen senilai Rp 6.014.496/tahun/orang.
Keyword: Trollimg, Fishery management, PPN Palabuhanratu, TunaTuna longline, Fishing effort, Fishing port, Tuna fisheries, W.T.P., Mey condition, Fisheries management, Economic rent

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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