6 research outputs found

    STRUKTUR KOMUNITAS HUTAN MANGROVE DI TELUK DODINGA, KABUPATEN HALMAHERA BARAT PROVINSI MALUKU UTARA

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    Mangrove merupakan salah satu ekosistem penting di kawasan pesisir. Pemanfaatan yang berlebihan dapat menurunkan kuantitas dan kualitas ekosistem mangrove. Tujuan penelitian ini adalah mengetahui kondisi ekosistem mangrove berdasarkan struktur komunitas. Pengambilan contoh mangrove, dilakukan dengan menggunakan metode transect quadrant dan “spot check”  (Bengen, 2004). Berdasarkan hasil penelitian ditemukan 12 spesis mangrove yang berasal dari 5 famili. Struktur vegetasi hutan mangrove menunjukan nilai tertinggi untuk kategori kerapatan terdapat pada stasiun I yakni dengan nilai 9,50 ind/ m2 dan diikuti oleh stasiun II dengan nilai 6,78 ind/ m2  serta nilai terendah terdapat pada stasiun III yaitu 6,56 ind/m2. Struktur komunitas hutan mangrove di Teluk Dodinga berdasarkan indeks ekologi (nilai kerapatan, frekuensi jenis, tutupan dan nilai penting)  cukup baik, sedangkan keanekaragaman spesies mangrove termasuk dalam kategori sedang. Secara umum  kondisi lingkungan masih sesuai dengan kriteria habibat mangrov

    Pola Sebaran dan Kelimpahan Hiu Berjalan Halmahera (Hemiscyllium halmahera) di Teluk Weda Maluku Utara, Indonesia

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    The Halmahera walking shark is a nocturnal species that lives at the bottom of waters and is a species endemic to North Maluku. Weda Bay is one of the largest bays on the island of Halmahera and contains marine resources and high diversity. The aims research was analyze the distribution pattern and abundance of Halmahera walking shark at that location. The research was conducted in September - November 2020. The sampling in Weda Bay, is carried out in two methods, (1) catch of nets with a mesh size of 2,5 cm stretched from the mangrove ecosystem, seagrass to coral reefs with a length of ± 50 meters and a height of 1,5 meters, (2) hand sampling equipment namely the sample catch it by hand with transect area (50x50m2) or 0,25 ha using basic diving equipment (snorkeling) to a depth of 3 meters at high tide in the night. Distribution pattern data analysis used Morisita Index and abundance analysis used reef fish abundance equation. Results the research found 28 individuals, namely 17 females and 11 males. There are 2 distribution patterns of the Halmahera epaullette shark, namely Grouping and Random. The clustered distribution pattern is found at stations 1, 2 and 4, while the random distribution pattern is found at station 3. Overall the distribution pattern of the Halmahera walking shark in Weda Bay is grouped. The highest abundance of Halmahera walkingshark was at station 1, namely 17,33 ind/ha and the lowest abundance at stations 3 and 4 was 5,33 ind/ha. The highest abundance is at station 1, this is because the habitat is still very good from the mangrove, seagrass and coral reef ecosystems to find food and the growth of the Halmahera walking shark.Hiu Berjalan Halmahera merupakan spesies nokturnal yang hidup di dasar perairan dan merupakan spesies endemik Maluku Utara. Teluk Weda merupakan salah satu teluk terluas di pulau Halmahera dan menyimpan sumberdaya perairan serta keanekaragaman tinggi. Penelitian ini dilakukan untuk mengetahui analisis pola sebaran dan kelimpahan Hiu Berjalan Halmahera, yang dilaksanakan pada September - November 2020. Pengambilan sampel di Teluk Weda, dilakukan dengan dua cara yaitu (1) menggunakan jaring dengan ukuran mata jaring 2,5 cm yang dibentangkan dari ekosistem mangrove, lamun sampai terumbu karang sepanjang ± 50 meter dan tinggi 1,5 meter, dan (2) menggunakan metode hand sampling equipment yaitu sampel ditangkap menggunakan tangan dengan luasan transek jelajah (50x50m2) atau 0,25 ha menggunakan alat selam dasar (snorkeling) sampai kedalaman 3 meter pada saat pasang di waktu malam hari. Analisis data pola sebaran menggunakan Indeks Morisita dan kelimpahan menggunakan persamaan kelimpahan ikan karang. Hasil penelitian dapat ditemukan 28 individu, yaitu 17 individu betina dan 11 individu jantan. Terdapat 2 pola sebaran dari Hiu Berjalan Halmahera, yaitu mengelompok dan acak. Pola sebaran mengelompok ditemukan pada stasiun 1, 2 dan 4, sedangkan pola sebaran acak terdapat pada stasiun 3. Secara keseluruhan pola sebaran Hiu Berjalan Halmahera di Teluk Weda adalah mengelompok. Kelimpahan Hiu Berjalan Halmahera tertinggi berada di stasiun 1 yaitu 17,33 ind/ha dan kelimpahan terendah pada stasiun 3 dan 4 yaitu 5,33 ind/ha. Kelimpahan tertinggi berada pada stasiun 1, hal ini dikarenakan habibat yang masih sangat baik dari ekosistem mangrove, lamun dan terumbu karang untuk mencari makan dan pertumbuhan Hiu Berjalan Halmahera

    Tuna Fish Processing for Improvement the Economy of Fishermen's Household in Falabisahaya Village, Mangoli Utara District

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    The problem seen by the people of Falabisahaya Village while being fishermen is that they experience problems in marketing fish in large quantities during the harvest season for sea fish, especially tuna. This condition, of course, involves the cooperation of the fisherman/fisherman's wife to help their husband's obligations after crossing the ocean. The objectives of this service activity are: 1) increasing the knowledge, insight and skills/skills of fishermen's wives by providing fish processing-based products, for example (fish shreds), 2) providing inspiration and active preparation so that fishing couples get arrangements to strengthen independent businesses, 3) provide preparation of bundling plans and marking of fish handling goods, and provide business prepared by implementers. As one of the marine fishery products, benefits for welfare and post-collection care and the hypothesis of making marine fish-based goods. As a result of these actions, it shows an increase in the cooperation of accomplices in the implementation of catering assistance and assistance, preparation in the coastal area for the management of fishing pairs, as well as supervision of the exchange of Trading Business Permits (SIUP). Also, outreach exercise means ensuring the existence and progress of the business they will be involved in, starting from the most common ways of providing raw components, manufacturing processes, and managing finances. then at that time, this training activity opened up knowledge for fishing couples that it turns out that fish can be made into snacks, for example shredded meat which has high nutritional value (Jusniati et al., 2017). In addition to getting the knowledge of making shredded tuna from tuna, the participants were also ready to make designs of shredded fish

    Hutan mangrove di Pulau Ternate secara spasial dan temporal

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    Hutan mangrove merupakan vegetasi yang sangat penting di wilayah pesisir pantai.  Keberlanjutan hutan mangrove perlu mendapat perhatian memiliki beberapa fungsi yang meliputi fungsi ekologi, fungsi fisik, dan ekonomi.  Penelitian ini bertujuan untuk mengetahui status hutan mangrove berdasarkan indeks ekologi dan menganalisis spasial temporal luas hutan mangrove di Pulau Ternate.  Metode yang digunakan dalam penelitian ini adalah survey pengukuran data lapangan yang di laksanakan di Kelurahan Mangga Dua, Kelurahan Gambesi dan Kelurahan Rua. Spasial temporal menggunakan data citra resolusi tinggi yang bersumber dari Google Earth  selama 20 tahun dengan akuisisi lima waktu perekaman  yaitu tahun 2022, 2020, 2015 2010 dan 2001 dengan aplikasi Sistem Informasi Geografis (SIG).  Hasil penelitian diperoleh informasi status hutan mangrove di Kelurahan Mangga Dua, Kelurahan Gambesi dan Kelurahan Rua dengan menggunakan beberapa indicator indeks ekologi diketahui dalam kondisi rusak hingga  kondisi sedang. Luas mangrove di Pulau Ternate pada tahun 2002 adalah 5.97 ha dan mengalami penurunan luas area sampai tahun 2022 menjadi 2.51 ha. Degradasi kondisi hutan mangrove di Pulau Ternate perlu diantisipasi dengan model pengelolaan berkelanjutan dan penerapan konsep transdisipliner. Kata kunci : Biodiversitas, degradasi, pesisir, pulau kecil, tropis

    DNA barcoding and morphometric of Rastrelliger Spp in North Maluku Sea. Indonesia

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    High exploration activity is feared to have an impact to mackerel populations. A sustainable management approach should be taken to provide information about the status of mackerel populations. Study of mackerel population status can be carried out through genetic information. The DNA of the fish samples were collected at traditional fish markets (Ternate, Morotai and Bacan, South Halmahera District). Laboratory works such as extraction, amplification, electrophoresis and DNA sequencing were analysis at the Indonesian Biodiversity Laboratory (BIONESIA). The molecular characteristics of Rastrelliger kanagurta were 374 base pairs (bp). The composition of nucleotides showed the similarity of frequencies between species. Phylogenetic relationship of R. kanagurta in North Maluku Sea suggested that there was any differentiation. The genetic diversity of R. kanagurta was high with a total number of haplotypes and diverse nucleotide diversity. The minimum spawning networks (MSN) found 5 haplotype networks from a total of 12 samples. Morphological measurements of standard length, head height, body width, pectoral fin length and tail were found to have variable values. The length of the weight of the fish is obtained of b = 3, indicating that the growth pattern was isometric or weight gain was equivalent to the growth of the fish length.Keywords : biodiversity, conservation, ecology, morphology, specie
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