Judul: Fisher's Perception and Composition of Catches Using Portable FAD in Ambon Waters
Abstrak: Provinsi Maluku merupakan salah satu daerah penangkapan ikan terbesar di Indonesia. Memiliki luas 581.376 km² dengan proporsi 90% perairan dan 10% daratan. Provinsi ini terkenal sebagai daerah ruaya ikan pelagis besar sehingga memiliki potensi yang sangat besar di bidang perikanan. Mini purse seine adalah salah satu alat tangkap yang banyak digunakan di perairan Ambon karena alat ini sangat produktif untuk menangkap ikan-ikan pelagis. Tujuan dari penelitian ini yaitu untuk menentukan persepsi nelayan terhadap penggunaan rumpon portable, menganalisis komposisi ukuran dan tingkat kelayaktangkapan ikan target di sekitar rumpon portable, serta menganalisis dampak pengoperasian rumpon portable. Metode penelitian dilakukan dengan wawancara dan observasi secara langsung dengan mengikuti operasi penangkapan ikan sebanyak dua trip dan menghabiskan waktu selama ±20 hari/trip. Hasil pada penelitian ini menunjukkan sebanyak 32% nelayan memiliki persepsi positif, 39% netral, dan 29% tidak setuju terhadap penggunaan rumpon portable. Komposisi hasil tangkapan mini purse seine cukup beragam, terdapat 7 spesies dari 1318 ikan yang tertangkap. Hasil tangkapan mini purse seine menunjukkan 53,64% ikan tidak layak tangkap dan 46,36% ikan layak tangkap., Moluccas province is one of the largest fishing areas in Indonesia. It has an area of 581,376 km² with a proportion of 90% water and 10% land. This province is known as a large pelagic fish area, so it has enormous potential in the field of fisheries. Mini purse seine is one of the most widely used fishing gear in Ambon waters because it is very productive for catching pelagic fish. The purpose of this study was to determine fishermen's perceptions of the use of portable FADs, analyze the composition of catched fish and sustainability of target fish around portable FADs, and to analyze the impact of operating portable. The research method was conducted by interviewing and observing directly by following fishing operations for two trips and spending ±20 days/trip. The results of this study indicate that 32% of fishermen have positive perceptions, 39% are neutral, and 29% do not agree with the use of portable FADs. The composition of the mini purse seine catch is quite diverse, there are 7 species of 1318 fish caught. The catch of mini purse seine showed that 53.64% of fish were not eligible to catch and 46.36% of fish were eligible to catch.
Keyword: Ambon, Mini Purse Seine, Portable FAD-4

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: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology