Judul: Utilization of Marine Biota in the Bedul Block Mangrove Forest, Alas Purwo National Park, East Java Province
Abstrak: Ekosistem mangrove memiliki keterkaitan dengan biota laut khususnya perairan payau. Ekosistem mangrove berfungsi sebagai daerah pengasuhan (nursery ground), tempat pemijahan (spawning ground), dan daerah mencari makan (feeding ground). Penelitian ini bertujuan untuk mengidentifikasi kondisi lingkungan perairan mangrove Desa Sumberasri, mengidentifikasi biota laut yang dimanfaatkan oleh masyarakat sekitar kawasan diperairan Taman Nasional Alas Purwo (TNAP), mengidentifikasi pola pemanfaatan biota laut di perairan TNAP oleh masyarakat sekitar kawasan. Metode penelitian yang digunakan ialah studi pustaka, observasi lapang, dan wawancara dengan menggunakan analisis SWOT, dan analisis deskriptif kualitatif. Hasil penelitian menunjukkan diPerairan Blok Bedul terdapat 13 jenis pisces, 6 jenis crustace, dan 3 jenis molusca. Masyarakat nelayan Desa Sumberasri memanfaatkan hasil tangkapan biota mangrove dilakukan dengan cara dijual ke pengepul. Pengolahan jenis biota diluar perikanan tangkap belum ada. Hasil tangkapan yang biasanya langsung dijual ke pengepul atau konsumen, sebaiknya dilakukan pengolahan terlebih dahulu agar nilai jual semakin tinggi., The mangrove ecosystem is related to marine life, especially brackish waters. The mangrove ecosystem functions as a nursery ground, a spawning ground, and a feeding ground. This study aims to identify the environmental conditions of the mangrove waters of Sumberasri Village, identify marine biota that is used by the community around the area in the waters of Alas Purwo National Park (TNAP), identify patterns of utilization of marine biota in TNAP waters by the community around the area. The research method used is literature study, field observation, and interviews using SWOT analysis and qualitative descriptive analysis. The results showed that in Bedul Block waters there were 13 types of pisces, 6 types of crustace and 3 types of molluscs. The fishing community of Sumberasri Village uses the catch of mangrove biota by selling it to collectors. Processing of biota types outside of capture fisheries does not yet exist. The catch, which is usually sold directly to collectors or consumers, should be processed first so that the selling value is higher.
Keyword: Fishermen, Marine biota, TNAP

Judul: Keterkaitan Ekosistem Mangrove dengan Keanekaragaman Ikan di Pabean Ilir dan Pagirikan, Pasekan Indramayu, Jawa Barat
Abstrak: Mangrove ecosystem has high productivity because it has the ability as a nutrient trap, which supports aquatic biota, especially fish. The purpose of this study was to determine the relationship between mangrove densities with total fish catch, number of fish species, and fish diversity. The data collections were mangrove condition, fish, physical, and chemical parameters. The results showed that mangrove density in Pabean Ilir Village higher than Pagirikan village. The highest importance value index of mangrove was Rhizophora mucronata and Avicennia marina. Total number of fish catch in two locations were 1093 individuals, consisting of 80 species belonging to 38 families. The dominant fish species were Ambassis nalua, Johnius belangerii, Leiognathus equulus, and Platycephalus indicus. There was positive relationship between the mangrove density with the total number of fish catch, number of fish species, and fish diversity in Pabean Ilir Village and Pagirikan Village, Pasekan Indramayu, West Java.
Keyword: mangroves., Indramayu, fish, Bogor Agricultural University (IPB)

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular