Jurnal Kelautan: Indonesian Journal of Marine Science and Technology
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UTILIZATION OF MULTITEMPORAL LANDSAT DATA FOR COASTLINE CHANGE ANALYSIS USING CANNY EDGE DETECTOR
No full textABSTRACTThe development of remote sensing technology has experienced significant progress. This progress is marked by the availability of images of various resolutions with complete channels, open-source, and their development in various image classification techniques such as edge detection techniques. This study aims to examine changes in the coastline in Banmaleng Village, Gili Raja Island, Sumenep Regency using the Canny edge detection algorithm on multitemporal Landsat 7 and 8 imagery in 2005 - 2020. The edging process includes (a) minimize noise by applying a Gaussian filter, (b) determine the image intensity gradient, (c) apply non-maximum emphasis to eliminate spurious responses to objects, (d) define multiple thresholds for determining potential image edges, (e) Track edge hysteresis by pressing all other weak edges that are not connected to firm edges. Canny edge detection produces sharp edges to analyze coastline changes quite well. Every five years, the coastline of Banmaleng Village experienced shifting from 0,4 to 2,3 meters in several areas.Keywords: Edge Detection, Landsat, Coastline, Canny Algorithm, Gili Raj
ASPEK EKOLOGI DAN PERTUMBUHAN KERANG BULU (Anadara antiquata) DI PERAIRAN LETMAN, KABUPATEN MALUKU TENGGARA
No full textABSTRACTFeather shells are an important commodity that has the potential to be developed. Feather shells are a fishery resource that has been exploited for thousands of years for consumption. The objectives of this study were 1) to examine individual density, 2) relative density, 3) distribution pattern, 4) relationship of length and weight and 5) condition factors of feather shells. Sampling was carried out using the belt transect method. The sample of feather shells was then measured for the length, width and height of the body and weighed. Based on the transect, the individual density of feather clams (Anadara antiquata) was found on transect 4, which was 0.338 ind / m2, while the lowest density was found on transect 2, which was 0.05 ind / m2. The highest relative density of feather shells was on transect 4 at 19% and the lowest was on transects 1 and 2 at 1%. The distribution of feather shells was obtained that the feather shells had a clustered distribution pattern with an Id value of 1.30 (Id 1). The correlation between length and weight of feather shells was found to have a b value of 2.60 so that the growth pattern was classified as positive allometric (b 2.50). The condition factor obtained an average value of 1.25 indicating that the environmental conditions were good enough for the organism (Kn 1).Keywords: feather shells, ecological aspects, growth, LetmanABSTRAKKerang bulu merupakan salah satu komoditas penting yang sangat potensial dikembangkan. Kerang bulu menjadi salah satu sumber daya perikanan yang telah dieksploitasi sejak beribu-ribu tahun yang lalu untuk dikonsumsi. Tujuan dari penelitian ini yaitu 1) mengkaji kepadatan individu, 2) kepadatan relatif, 3) pola distribusi, 4) hubungan panjang dan berat serta 5) faktor kondisi kerang bulu. Pengambilan sampel dilakukan dengan menggunakan metode belt transek. Sampel kerang bulu kemudian dilakukan pengukuran panjang, lebar dan tinggi tubuh serta ditimbang beratnya. Kepadatan individu kerang bulu (Anadara antiquata) berdasarkan transek diperoleh kepadatan tertinggi terdapat pada transek 4 yaitu sebesar 0,338 ind/m2 sedangkan kepadatan terendah terdapat pada transek 2 yaitu sebesar 0,05 ind/m2. Kepadatan relatif tertinggi kerang bulu terdapat pada transek 4 sebesar 19% dan terendah pada transek 1 dan 2 sebesar 1%. Distribusi kerang bulu diperoleh kerang bulu memiliki pola penyebaran mengelompok dengan nilai Id sebesar 1,30 (Id1). Hubungan panjang dan berat kerang bulu didapati nilai b sebesar 2.60 sehingga pola pertumbuhan tergolong allometrik positif (b2.50). Faktor kondisi diperoleh nilai rata-rata sebesar 1.25 menunjukan kondisi lingkungan cukup baik bagi organisme (Kn1).Kata kunci: kerang bulu, aspek ekologi, pertumbuhan, Letma
DISTRIBUSI SPASIAL DAN TEMPORAL FITOPLANKTON DI PERAIRAN LAUT TROPIS
No full textABSTRACTPhytoplankton are aquatic organisms that are free to float following the movement of the current. The distribution of phytoplankton is widespread throughout the body of water, both in rivers, estuaries, lakes, reservoirs, beaches and oceans. Water quality conditions will affect the presence of phytoplankton in certain waters. The purpose of this review article is to examine the types of phytoplankton that are spatially and temporally distributed and the physicochemical factors that affect the spatial and temporal distribution of phytoplankton in tropical waters. Assessing the spatial and temporal distribution of phytoplankton in tropical waters sourced from the latest national and international scientific journals and as a reference source of information for further research. The study in this paper is a literature review or literature study originating from the latest national and international scientific journals, with a focus on studying several research results that are relevant to the research topic, the study material is adjusted to the research data. The study area (tropical and subtropical) includes Indonesia, Malaysia, China, Brazil and India. The Bacillariophyceae class is found in all waters both spatially and temporally. The distribution of phytoplankton is spatially influenced by the presence of nutrients, then temporally the highest is found in the dry season. The distribution of phytoplankton is influenced by physical and chemical parameters of the waters (dissolved oxygen, temperature, salinity, pH, suspended solids/SPM, nitrate and phosphate) especially the presence of nutrients. Keywords: Phytoplankton, Distribution, Spatial and Temporal, Tropical WatersABSTRAKFitoplankton merupakan organisme akuatik yang bebas melayang mengikuti pergerakkan arah arus. Distribusi fitoplankton tersebar luas di seluruh badan perairan baik di sungai, muara, danau, waduk, pantai maupun samudera. Kondisi kualitas perairan akan mempengaruhi keberadaan fitoplankton di perairan tertentu. Tujuan review artikel ini mengkaji jenis fitoplankton yang terdistriusi secara spasial dan temporal serta faktor-faktor fisika kimia yang mempengaruhi distribusi spasial dan temporal fitoplankton di perairan tropis. Mengkaji distribusi spasial dan temporal fitoplankton di perairan tropis yang bersumber dari berbagai jurnal terbaru ilmiah nasional dan internasional serta sebagai sumber rujukan informasi untuk penelitian selanjutnya. Kajian pada tulisan ini merupakan telaah literatur atau studi pustaka yang berasal dari berbagai jurnal ilmiah terbaru nasional dan internasional, dengan fokus kajian beberapa hasil penelitian yang relevan dengan topik penelitian, materi kajian disesuaikan dengan data penelitian. Wilayah lokasi penelitian (tropis dan subtropis) meliputi Indonesia, Malaysia, Cina, Brazil dan India.Kelas Bacillariophyceae ditemukan di seluruh perairan baik secara spasial dan temporal. Distribusi fitoplankton secara spasial di pengaruhi keberadaan nutrien, kemudian secara temporal tertinggi ditemukan pada musim kemarau. Distribusi fitoplankton dipengaruhi parameter fisika dan kimia perairan (Oksigen terlarut, suhu, salinitas, ph, padatan tersuspensi/SPM, nitrat dan fosfat) tertutama keberadaan unsur hara.Kata kunci: Fitoplankton, Disitribusi, Spasial dan Temporal, Perairan Tropi
TINGKAT PEMANFAATAN IKAN KEMBUNG (Rastrelliger kanagurta) DI PERAIRAN MAPUR YANG DIDARATKAN DI DESA KELONG, KABUPATEN BINTAN
No full textABSTRACTMapur waters is one of the fishing area by fishermen in Kelong Village and the mackerel has targeted fish caused high economical value that can increase fishermen's income. This study was held in September 2018 to April 2020 in Kelong Village landing based. The research aims to determine the catch per unit effort (CPUE), maximum sustainable yield (MSY), utilization rate, and total allowable catch (TAC) of mackerel fish captured in the Mapur Waters that landing in Kelong Village. The Fishermen in Kelong Village used fishing gear to catch mackerel fish using hand lines. The research method was used a survey method, the primary data are captured data and effort by fisherman, while secondary data were obtained from fishermen interviews and related literature. Analysis of data on this study was used the Schaefer method. The results showed that the average value of catch per unit effort (CPUE) are 9,40 kg/trip. Maximum sustainable yield (MSY) mackerel fish are 8246,3 kg/unit with optimal capture effort (fopt) 1739 trips. The utilization rate of 3,715% of MSY value was low. The total allowable catch (TAC) is 6597,03 kg/unit. Overall the capture effort mackerel fish still could be increased to get more optimal results, but does not exceed the pre-defined MSY limit.Keywords: Mackerel fish, MSY, Mapur waters, utilization rateABSTRAKPerairan Mapur merupakan salah satu daerah penangkapan ikan kembung oleh nelayan di Desa Kelong. Ikan kembung memiliki nilai ekonomis tinggi yang dapat menambah pendapatan nelayan. Penelitian ini dilaksanakan pada bulan September 2018 sampai April 2020 di tempat pendaratan Desa Kelong. Penelitian ini bertujuan untuk mengetahui catch per unit effort (CPUE), potensi lestari maksimum (MSY), tingkat pemanfaatan, serta jumlah tangkapan yang diperbolehkan (JTB) dalam penangkapan ikan kembung di Perairan Mapur yang didaratkan di Desa Kelong. Alat tangkap yang digunakan nelayan Desa Kelong untuk menangkap ikan kembung yaitu pancing ulur. Metode penelitian yang digunakan adalah metode survei. Data primer yang diambil berupa hasil tangkapan dan upaya penangkapan, sedangkan data sekunder didapat dari wawancara nelayan dan literatur yang terkait. Analisis data pada penelitian ini menggunakan metode Schaefer. Hasil penelitian menunjukkan bahwa nilai rata-rata catch per unit effort sebesar 9,40 kg/trip. Potensi lestari maksimum ikan kembung sebesar 8246,3 kg/unit dengan upaya penangkapan optimal (fopt) 1739 trip. Tingkat pemanfaatan sebesar sebesar 3,715 % dari nilai MSY dikategorikan rendah, sedangkan nilai jumlah tangkapan yang diperbolehkan sebesar 6597,03 kg/unit. Secara keseluruhan penangkapan ikan kembung masih bisa ditingkatkan untuk mendapatkan hasil yang lebih optimal, tetapi tidak melebihi batas MSY yang sudah ditentukan.Kata Kunci: ikan kembung, MSY, Perairan Mapur, tingkat pemanfaata
PROFIL GC-MS DARI EKSTRAK DAUN RHIZOPHORA APICULATA DARI PESISIR TELUK TOMINI, SULAWESI TENGAH DENGAN AKTIVITAS ANTIBAKTERI DAN ANTIOKSIDAN
No full textABSTRACTMangroves are plants with good tolerance to salinity changes, developing a chemical defense system with pharmacological value. This study aimed to obtain a GC-MS profiles of Rhizophora apiculata mangrove leaves extract, which could scavenge DPPH radicals and inhibit the growth of Listeria monocytogenes, Salmonella typhimurium, and Pseudomonas aeruginosa. The research included sampling, extraction (maceration with MeOH:DCM), identification of chemical profiles using GC-MS spectra analysis, assaying for antibacterial activity (well diffusion method), and antioxidants (DPPH radical scavenging). Mangrove leaves sampling was carried out on Laemanta, Parigi Moutong, Central Sulawesi. Based on the leaves’ characteristics and tips, the types of roots, fruits, and flowers, the mangrove leave samples were identified as R. apiculata. The GC-MS profiles of R. apiculata leaves extract was dominated by mome inositol (75.6%). The antibacterial assay showed at a concentration of 100 mg/mL of R. apiculata leaves extract showed weak to strong antibacterial activity, with the inhibition zone diameter of P. aeruginosa (1.22 ± 0.39 mm), S. typhimurium (3.00 ± 1.20 mm), and L. monocytogenes (17.22 ± 1.26 mm). The leaves extract of R. apiculata showed antioxidant activity, with an IC50 value of 96.68 ± 0.68 µg/mL. Based on the results, the mangrove leaves of R. apiculata extracts showed potential antibacterial and antioxidant activity. This study indicated that R. apiculata from Central Sulawesi were potential mangroves to discover and develop antibacterial and antioxidant agents.Keywords: GC-MS, Listeria monocytogenes, Parigi Moutong, Pseudomonas aeruginosa, Salmonella typhimurium.ABSTRAKMangrove merupakan tumbuhan dengan toleransi baik terhadap perubahan salinitas, sehingga mengembangkan suatu sistem pertahanan kimia yang bernilai farmakologis. Penelitian ini bertujuan mendapatkan profil senyawa dengan GC-MS dari ekstrak daun mangrove Rhizophora apiculata yang dapat menangkap radikal DPPH dan menghambat pertumbuhan Listeria monocytogenes, Salmonella typhimurium, dan Pseudomonas aeruginosa. Penelitian meliputi pengambilan sampel, ekstraksi daun mangrove (maserasi dengan MeOH:DCM), identifikasi profil senyawa dengan analisis spektra GC-MS, pengujian aktivitas antibakteri (metode difusi sumur) dan antioksidan (penangkapan radikal DPPH). Pengambilan sampel daun mangrove dilakukan di pesisir Desa Laemanta, Kabupaten Parigi Moutong, Sulawesi Tengah. Berdasarkan karakteristik bentuk dan ujung daun, jenis akar, buah, dan bunga, sampel daun mangrove terindentifikasi Rhizophora apiculata. Profil GC-MS dari ekstrak daun R. apiculata didominasi oleh senyawa mome inositol (75,6%). Hasil pengujian antibakteri pada konsentrasi 100 mg/mL ekstrak daun R. apiculata menunjukkan aktivitas antibakteri yang lemah sampai kuat, dengan diameter zona hambat pada P. aeruginosa (1,22 ± 0,39 mm), dan S. typhimurium (3,00 ± 1,20 mm), L. monocytogenes (17,22 ± 1,26 mm). Ekstrak daun R. apiculata menunjukkan aktivitas antioksidan dengan nilai IC50 sebesar 96.68 ± 0.68 µg/mL. Berdasarkan hasil pengujian ekstrak daun mangrove R. apiculata menunjukkan aktivitas antibakteri dan antioksidan. Penelitian ini mengindikasikan bahwa R. apiculata asal Sulawesi Tengah menjadi mangrove yang potensial dijadikan sebagai agen antibakteri dan antioksidan.Kata Kunci: GC-MS, Listeria monocytogenes, Parigi Moutong, Pseudomonas aeruginosa, Salmonella typhimurium
KARAKTERISTIK FISIK DAN ORGANOLEPTIK TEPUNG DAGING KERANG BAMBU (Solen sp.) DENGAN BAHAN PERENDAM YANG BERBEDA
No full textABSTRACTBamboo shells (Solen sp.) is sea shells that have high nutritional content so that they have the potential to be developed as a food source in various product diversifications, such as bamboo clam meat flour. The research aims at determining bamboo clam’s meat flour characteristics physically and organoleptically by using various soaking ingredients. The results show that the different soaking materials have no significant effect on the yield of bamboo clam’s meat meal (Solen sp.) with a significance value (p = 0.054). The highest yield of bamboo clam’s meat flour (Solen sp.) is bamboo clam’s meat flour soaked in lemon lime with a value of 11.5%. The results of testing the characteristics of the color of the bamboo clam’s meat flour physically show that the whiteness of the bamboo clam’s meat flour (Solen sp.) soaked using lime, lemon, lime “limau:, and kaffir lime is 55.73%, 54.19%, 55.09%, 53.72%. The organoleptically testing results (color, texture, aroma) of bamboo clam’s meat flour, and the taste of cheese sticks are that were the most preferred by the panelists were bamboo clam’s meat flour soaked in lemon with an organoleptic average value of 4.1 on an organoleptic scale of 1 - 5.Keywords: Shellfish flour, Shellfish organoleptic, Solen sp., whiteness level of flour.ABSTRAKKerang bambu (Solen sp.) merupakan kerang laut yang mempunyai kandungan gizi tinggi sehingga berpotensi untuk dikembangkan sebagai sumber pangan dalam berbagai diversifikasi produk yaitu tepung daging kerang bambu. Tujuan penelitian ini untuk mengetahui karakteristik fisik dan organoleptik tepung daging kerang bambu dengan menggunakan berbagai bahan perendam. Hasil penelitian menunjukkan bahan perendam yang berbeda memberikan pengaruh yang tidak berbeda nyata terhadap rendemen tepung daging kerang bambu (Solen sp.) dengan nilai signifikansi (p=0.054). Rendemen tepung daging kerang bambu (Solen sp.) yang paling besar adalah tepung daging kerang bambu yang direndam menggunakan jeruk lemon dengan nilai sebesar 11,5%. Hasil uji karakteristik fisik warna tepung daging kerang bambu menunjukkan bahwa derajat putih tepung daging kerang bambu (Solen sp.) yang direndam menggunakan jeruk nipis, jeruk lemon, jeruk limau, jeruk purut berturut-turut sebesar 55,73%, 54,19%, 55,09%, 53,72%. Hasil uji organoleptik (warna, tekstur, aroma) tepung daging kerang bambu, dan rasa stick keju yang paling disukai panelis yaitu tepung daging kerang bambu yang direndam menggunakan jeruk lemon dengan nilai rata-rata organoleptik 4.1 pada skala organoleptik 1 – 5.Kata kunci: Tepung daging kerang, Organoleptik kerang, Solen sp., Derajad putih tepung
PENGKAYAAN VITAMIN DAN MINYAK IKAN PADA RAGI ROTI SEBAGAI PAKAN Brachionus plicatilis YANG DIBERIKAN DENGAN METODE TETES
No full textABSTRACTThe Brachionus plicatilis is a type of zooplankton that plays a vital role in the animal feed of the various kinds of fish held in water. The advantages of Brachionus plicatilis are a very small feed, slow swimming, easy to be eaten by larvae and relatively short time cultures, high repruductive rates, high nutritional content, leaven in on alternative kind of food for the Brachionus plicatilis it is generally confused when phytoplankton in insufficient. Yeast is a culture food that can be enriched with a scoott emulsion, vitamins B12, Vitamins C is essential for growth and survival. One of the leaven given cultivation of the Brachionus plicatilis is a leaven of bread. However, it is not known clearly about the proper concentration of yeast in the culture of Brachionus plicatilis,this study is aimed at deducing the effects of the leaven that Scoott emulsion, vitamin C and Vitamin B12 drip methods used on the density of Brachionus plicatilis. The study was cirried out in June 2020, located in the hydromining research Laboratory, the University of Mataram. Research USES a completely random design where that treatment is usedP1(without leaven), P2 (0.3 gram), P3 (0.6 gram), P4 (0.9 gram), P5 (1.2 gram). The best got at treatment P5 with a concentration of 1.2 gram is the best treatment to produce much density 524 cell/mL.Keywords: Brachionus plicatilis, Drop Method, baker yeast, Scoot emulsion,and VitaminABSTRAKBrachionus plicatilis merupakan jenis zooplankton yang berperan penting sebagai pakan hidup bagi berbagai jenis ikan yang dibudiayakan. Keunggulan Brachionus plicatilis sebagai pakan adalah ukuran sangat kecil, berenang lambat sehingga mudah untuk dimangsa oleh larva dan waktu kultur relatif singkat, laju reproduksi tinggi, kandungan gizi cukup tinggi. Ragi merupakan jenis pakan alternatif bagi Brachionus plicatilis yang umumnya digunakan apabila kultur fitoplankton tidak mencukupi. Ragi rotimerupakan jenis pakan kulturyang dapat diperkaya dengan scoott emulsion, Vitamin B12 dan vitamin C sangat dibutuhkan untuk pertumbuhan dan kelangsungan hidupnya. Akan tetapi, belum diketahui secara jelas mengenai konsentrasi ragi rotiyang tepat dalam kultur pada Brachionus plicatilis. Penelitian ini bertujuan untuk menyimpulkanpengaruh pemberian ragi roti yang diperkaya Scoott emulsion, vitamin C dan vitamin B12 metode tetes terhadap kepadatan Brachionus plicatilis.Penelitian dilaksanakan pada tanggal 30 juni sampai 6 juli 2020, bertempat di Laboratorium Program Studi Budidaya Perairan, Universitas Mataram.Penelitian menggunakan Rancangan Acak Lengkap (RAL) dimanaperlakuan yang digunakan yaitu P1 (tanpa ragi), P2 (0.3 gram), P3 (0.6 gram), P4 (0.9 gram), P5 (1.2 gram). Hasil yang terbaik didapatkanpada perlakuan P5 dengan konsentrasi ragi 1.2 grammerupakan perlakuan terbaik dengan menghasilkan kepadatan sebanyak 524sel/mL.Kata Kunci: Brachionus plicatilis, Metode Tetes, Ragi Roti, Scoot emulsion,dan Vitami