Judul: Estimasi  Potensi Propagul sebagai Upaya Rehabilitasi dan Konservasi Ekosistem  Mangrove di Desa Pejarakan, Buleleng, Bali
Abstrak: Kajian propagul merupakan langkah awal untuk mendapatkan data dasar yang digunakan sebagai pedoman dalam pengelolaan ekosistem mangrove yang berkaitan dengan regenerasi alami. Penelitian ini bertujuan mengestimasi potensi propagulnya secara kuantitatif dan kualitatif guna mendukung upaya pengelolaan dan konservasi ekosistem mangrove. Penelitian dilaksanakan pada bulan Oktober-November 2022, di kawasan mangrove milik PT Agung Menjangan Mas, Desa Pejarakan, Bali. Hasil penelitian menunjukkan bahwa komposisi mangrove yang terdapat di lokasi penelitian terdiri dari enam jenis yaitu Bruguierra gymnorrhiza, Ceriops tagal, Rhizophora mucronata, Rhizophora apiculata, Rhizophora stylosa, dan Sonneratia Alba. Vegetasi pohon mangrove menunjukkan kawasan mangrove didominasi oleh pohon induk jenis R. apiculata dan R. mucoranata dengan INP sebesar 104,41% dan 101,12%. Propagul jenis R. apiculata dan R. mucronata masuk dalam kategori sangat potensial, B. gymnorrhiza dan C. tagal potensial, R. stylosa dan S. alba tidak potensial. Secara umum komunitas mangrove Desa Pejarakan memiliki propagul yang potensial untuk regenerasi alami mangrove terutama jenis R. mucronata dan R. apiculata sementara propagul R. stylosa dan S. alba tidak maksimal dalam proses regenerasi., Propagul study is the first step to obtain basic data that is used as a guideline in the management of mangrove ecosystems related to natural regeneration. The aim of this study is to estimate the potency of its propagules quantitatively and qualitatively to support efforts to manage and conserve mangrove ecosystems. Research conducted from October November 2022, in the mangrove area owned by PT Agung Menjangan Mas, Pejarakan Village, Bali. The results showed that the composition of the mangroves found at the study site consisted of six types, namely Bruguierra gymnorrhiza, Ceriops tagal, Rhizophora mucronata, Rhizophora apiculata, Rhizophora Stylosa, and Sonneratia Alba. Mangrove tree vegetation shows that the mangrove area is dominated by species R. apiculata and R. mucoranata with Importance Value Index (INP) of 104.41% and 101.12%. Propagules type R. apiculata and R. mucronata fall into the category of very potential, B. gymnorrhiza and C. tagal potential, R. stylosa and S.alba no potential. In general, the mangrove community of Pejarakan Village has potential propagules for natural regeneration of mangroves, especially species R. mucronata and R. apiculata while propagules R. stylosa and S.alba not optimal in the regeneration process.
Keyword: mangrove, natural regenaration, propagule

Judul: Potential of Mangrove Resources for Ecotourism Development in Pejarakan Village, Buleleng Regency, Bali
Abstrak: Potensi ekosistem mangrove yang berada di Desa Pejarakan, Kabupaten Buleleng tergolong cukup tinggi untuk dijadikan ekowisata, hal ini didukung oleh keanekaragaman jenis mangrove yang beragam, potensi biota yang tinggi, dan objek pemandangan yang indah. Penelitian ini bertujuan untuk menganalisis potensi sumberdaya mangrove untuk pemanfaatan ekowisata serta merumuskan strategi pengelolaan ekowisata mangrove di Desa Pejarakan, Kabupaten Buleleng, Bali. Penelitian ini berlokasi di ekosistem mangrove PT Agung Menjangan Mas, Tambak Pejarakan BBRBLPP, Desa Pejarakan. Data yang diambil berupa data parameter kesesuaian wisata mangrove, parameter lingkungan, dan parameter sosial ekonomi. Analisis yang dilakukan berupa analisis kesesuaian wisata (IKW), daya dukung kawasan, willingness to pay, persepsi masyarakat, serta analisis SWOT. Hasil penelitian yang didapat sesuai untuk dikembangkan menjadi ekowisata dengan nilai IKW kategori sesuai pada dua titik dan sangat sesuai pada satu titik. Nilai DDK sebesar 234 orang pengunjung per hari dengan panjang lintasan tracking mangrove sepanjang 1.461 meter. Analisis WTP yang didapat untuk tiket masuk sebesar Rp. 15.833, strategi pengembangan yang dapat dilakukan adalah strategi agresif, dan memiliki tiga prioritas strategi utama., The potential of mangrove ecosystems in Pejarakan Village, Buleleng Regency, is quite high to be used as ecotourism; this is supported by the diversity of diverse mangrove species, high biota potential, and beautiful scenic objects. This study aims to analyze the potential of mangrove resources for ecotourism utilization and formulate a mangrove ecotourism management strategy in Pejarakan Village, Buleleng Regency, Bali. This research is in the mangrove ecosystem of PT Agung Menjangan Mas, BBRBLPP Teaching Pond, and Pejarakan Village. The data taken is in the form of data on mangrove tourism suitability parameters, environmental parameters, and socioeconomic parameters. The analysis carried out is in the form of tourism suitability analysis (IKW), regional carrying capacity, willingness to pay, community perception, and SWOT analysis. The results of the research obtained are suitable to be developed into ecotourism, with the IKW value of the category at two points and very appropriate at one point. The DDK value is 234 visitors per day with a mangrove tracking track length of 1.461 meters. According to the WTP analysis obtained for entrance tickets of Rp. 15.833, the development strategy that can be done is aggressive and has three main strategic priorities.
Keyword: Mangrove ecosystem, Tourism suitability index, Willingness to pay

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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