Teluk Saleh terletak di sebelah timur laut Pulau Sumbawa, Nusa Tenggara Barat (NTB). Secara administratif, Teluk Saleh berada di dua kabupaten, yaitu Kabupaten Sumbawa dan Kabupaten Dompu. Teluk Saleh merupakan pusat kegiatan perekonomian laut yang dimanfaatkan sebagai lahan budidaya laut seperti budidaya rumput laut dan budidaya keramba jaring apung (KJA). Penelitian ini dilakukan pada tanggal 19 – 25 Mei 2016 di perairan Teluk Saleh, Kabupaten Dompu, NTB. Tujuan penelitian ini adalah untuk memperoleh variabilitas parameter kualitas air untuk budidaya laut. Pengambilan data kualitas perairan dilakukan secara purposive sampling dengan menggunakan alat multiparameter WQC-24. Parameter yang diukur yaitu parameter fisika; kecepatan arus, padatan tersuspensi (TSS), padatan terlarut (TDS), kecerahan, kekeruhan, dan suhu. Parameter kimia; kebutuhan oksigen biologis (BOD), oksigen terlarut (DO), derajat keasaman (pH), kadar amonia, dan unsur hara (Nitrat-NO3, Fosfat PO4 dan Klorofil-a). Analisis data dilakukan secara deskriptif menggunakan analisis PCA (Principal Component Analysis). Hasil analisis data menunjukan bahwa suhu, salinitas, DO, dan pH berada pada ambang normal antara 25 - 31 oC, 32 – 34 ppt, 5mg/l dan 8, yang artinya bahwa perairan di daerah penelitian secara umum tergolong perairan dengan produktifitas yang tinggi. Terdapat beberapa parameter yang masih melebihi baku mutu untuk budidaya laut yaitu parameter fosfat dan nitrat. Nilai konsentrasi nitrat kurang dari 0.1mg/l diduga sebagai akibat dari aktivitas perekonomian masyarakat di sekitar muara sungai yang membuang limbah ke perairan. Berdasarkan analisa PCA didapatkan parameter yang berperan kuat di lokasi adalah arus dan TSS.
Coral reefs in Kapoposang Islands have been degraded for years due to environmental pressures and human activities. After designated as marine protected area (MPA), coral reefs conditions (e.g. living coral coverage - both hard and soft corals) were monitored regularly since 2015 by several agencies. This study aims to evaluate the effectiveness of MPA management in Kapoposang by analyzing changes of coral reef coverage in its two core zones. The survey was conducted in July 2019 using Line Intercept Transect (LIT), video transect, and satellite imagery analysis, then compared to data from the previous assessment. Results of recent survey, i.e.: living coral reefs coverage ranged from 46.73% - 73.08%; 21 genera found with 10 dominant genera, which Porites sp., is a resistant coral genus and the most dominant genus in Kapoposang MPA; the highest coral recruitment was found in Suranti island at a depth of 10 meters, while the lowest is in Papandangan island; several genera in the form of recruitment (e.g. Acropora sp., Goniopora sp., Fungia sp., Favona sp., and Porites sp.); percentage of macroalgae is 2.95% of total coral reef substrate cover; the most densely macroalgae coverage is found in Suranti, while the lowest is in Kapoposang island.
The present study analyses the main dimension characteristics of the purse seiner in 4 location of artisanal fishery in Ambon Island in 2017. A total of 28 traditional purse seiners were measured for its length, breadth, and depth as well as identified its material, the shape of stern and bow. Those purse seiners are made of fibre and wood and they have raked bow, meier bow, raked stern and straight stern. The purse seiners measured have main dimensions ranging from 14.00 – 24.00 m (length), 1.50 – 3.90 m (breadth) and 1.00 – 3.15 m (depth). The analysis of main dimension ratio showed that only two of the purse seiners do not have the ratio value within the range of reference values. This result indicated that 26 of 28 purse seiners are good in maneuver, speed, longitudinal strength and stability and thus guarantee safety and successful of fishing operation.
This study aims to determine oceanographic characteristics such as tides, waves, and currents in Karimunjawa Coastal Waters during the 1st transitional season and to update the oceanographic database for spatial management evaluation in the region. The tidal characteristics were obtained from the least square method analysis using World Tide software based on Matlab programming language, while wave and current characteristics obtained from 2-dimensional numerical modeling using Mike 21 software on the flow model and spectral wave module. The primary data used were the significant wave height (Hs), wave peak period (Tp), and ocean current components (u and v velocity) on 13-26 May 2016 using the Sontex Argonaut XR type Acoustic Doppler Current Profiler (ADCP) equipment. Tide data were predicted for the Kemujan Islands station from 1-31 March 2020. Secondary data for additional numerical model input were obtained from ERA5-reanalysis in the form of Hs, Tp, u, and v wind velocity data for May 2020 with a temporal resolution of 20 minutes, while bathymetry data derived from GEBCO Satellite Derivated Bathymetry (SDB) data. The tide analysis results showed that Karimunjawa waters are a single daily mixed tidal type. The wave characteristic moves from east to west with high waves reached 0.9 meters and a peak period of 7 seconds. The eastern side of Karimunjawa Island, Kemujan Island, and the western area have a calmer wave. The current characteristic moves northeastward with a speed of 5-28 cm/s, which concludes that in several locations, such as the Menjangan Besar-Menjangan Kecil strait, the currents depend on the tidal conditions.
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