eJournal Badan Penelitan dan Pengembangan Kelautan dan Perikanan
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PEMODELAN KESESUAIAN HABITAT IKAN PELAGIS BERBASIS KONDISI OSEANOGRAFI DI PERAIRAN PALABUHANRATU
Get PDFPalabuhanratu merupakan pusat kegiatan potensial perikanan tangkap di Kabupaten Sukabumi. Salah satu tangkapan ikan yang dominan didaratkan di lokasi ini adalah kelompok jenis ikan pelagis. Kelompok jenis ikan pelagis memiliki sifat bergerombol (schooling) dalam bermigrasi. Sebaran dan kelimpahannya dipengaruhi oleh beberapa parameter oseanografi seperti suhu permukaan laut, konsentrasi klorofil- a, salinitas, arus hingga kedalaman perairan. Keberhasilan upaya penangkapan ikan sangat tergantung pada ketepatan dalam memprediksi daerah penangkapan. Pendugaan daerah penangkapan ikan, dapat dilakukan dengan pemahaman terhadap kondisi parameter oseanografi. Data parameter oseanografi selain berasal dari hasil pengukuran in-situ juga dapat memanfaatkan data hasil pantauan sensor satelit penginderaan jauh. Penelitian ini mengkaji kesesuaian habitat ikan pelagis berbasis kondisi oseanografi hasil pengukuran sensor satelit penginderaan jauh. Analisa kesesuaian habitat menggunakan pemodelan Maximum Entropy (Maxent). Hasil analisa kemudian ditransformasikan untuk menduga zona potensial penangkapan ikan dalam bentuk model. Hasil yang diperoleh menunjukkan nilai uji kontribusi dan jackknife yang menyatakan salinitas sebagai parameter oseanografi yang memiliki tingkat informasi paling tinggi dalam pembangunan model. Response curve menunjukkan parameter klorofil-a yang optimal bagi ikan pelagis pada rentang 0,015 mg/m3 hingga 0,25 mg/m3, suhu optimal pada rentang 26,3 oC hingga 27,7oC, kecepatan arus yang optimal pada 0,37m/s, salinitas yang optimal berkisar 32,15 PSU hingga 32,5 PSU dan batimetri yang optimal pada kedalaman 200 hingga 5000 meter.Palabuhanratu is a potential activity for capture fisheries in Sukabumi Regency. One of the dominant fish catches landed at this location is the pelagic fish species. The pelagic fish species has a schooling characteristic in migrating. Their distribution and abundance are influenced by several oceanographic parameters such as sea surface temperature, chlorophyll-a concentration, salinity, currents, and depth of the waters. The success of fishing efforts is very dependent on the accuracy in predicting the fishing area. Estimation of fishing areas can be done by understanding the condition of oceanographic parameters. Apart from in-situ measurement results, oceanographic parameter data can also utilize data from monitoring by remote sensing satellite sensors. This study examines the suitability of pelagic fish habitat based on oceanographic conditions measured by remote sensing satellite sensors. Habitat suitability analysis using Maximum Entropy (Maxent) modeling. The results of the analysis are then transformed to estimate potential fishing zones in the form of a model. The results obtained show the contribution and jackknife test values which state salinity as an oceanographic parameter that has the highest level of information in model development. The response curve shows the optimal chlorophyll-a parameters for pelagic fish in the range of 0.015 mg/m3 to 0.25 mg/m3, optimal temperature in the range of 26.3oC to 27.7oC, optimal current velocity of 0.37m/s, Optimal salinity ranges from 32.15 PSU to 32.5 PSU and optimal bathymetry at depths of 200 to 5000 meters
PENGARUH KESADARAN BUDAYA MARITIM TERHADAP SIKAP BELA NEGARA PADA MASYARAKAT PULAU TERLUAR
Get PDFBela negara di era globalisasi menjadi konsep yang sangat diperhatikan semua bangsa dan negara. Era globalisasi membawa ancaman bagi eksistensi nasionalisme, dan pondasi negara sehingga mendorong semua pihak mengenai pentingnya bela negara bagi warga negaranya. Penelitian tentang bela negara masyarakat pulau terluar sangat diperlukan, karena berkaitan dengan kekuatan negara pulau terluar. Tujuan dari kajian ini adalah menganalisis pengaruh budaya maritim pada masyarakat pulau terluar dalam upaya meningkatkan semangat bela negara. Metode penelitian dengan studi pustaka dan penelaahan literatur, serta pengumpulan data sekunder yang mendukung penelitian. Target yang ingin dicapai dalam penanaman nilai-nilai kebangsaan adalah untuk menumbuhkan kesadaran bela negara dan membangun rasa cinta kepada tanah air. Selain itu, penting itu ditanamkan nilai-nilai bela negara, cinta tanah air, kesadaran berbangsa dan bernegara, rela berkorban, serta keyakinan pada ideologi Pancasila dan kemampun yang diperlukan untuk melindungi bangsa sejak dini
ICHTHYOFAUNAL DIVERSITY AND CAPTURE FISHERIES IN OVIA RIVER, EDO STATE, NIGERIA.
No full textThe increasing reduction in the quantity and diversity of fish catch from freshwater bodies, has become a global concern due to its impacts on human nutrition, economy, culture and zoological spectrum of the aquatic ecosystem. This study ascertained the ichthyofauna composition and diversity of Ovia River, Edo State and its capacity to sustain capture fisheries. Fish catch from April, 2021 to March 2022 showed that Ovia River is congenial for 26 fish species of commercial importance, belonging to 5 orders, 13 families, 19 genera and 26 species. This is indicative of a rich diversity with Mormyridae dominant with 7 species, Cichlidae with 6 species, Mochokidae and Characidae with 2 species each, Ariidae, Bagridae, Channidae, Cyprinidae, Hepsetidae, Malapterunidae, Notopteridae, Pantodontidae and Schilbeidae with 1 species each. Fish species abundance showed that Cichlidae was the highest 61 individuals (39.61%), while Ariidae and Hepsetidae with 1 individual each (0.65%) were the least. The dominance and abundance of the highly priced Mormyridae and Cichlidae species implies that the water body has the capacity to sustain artisanal fisheries activities. This study has provided useful data for fisheries management and ecological studies of inland freshwater resources in Nigeria.
COMPARISON OF MORPHOLOGY AND GROWTH ASPECTS OF TIGERTOOTH CROAKER (OTOLITHES RUBER BLOCH & SCHNEIDER, 1801) IN THE PERSIAN GULF AND OMAN SEA
Get PDFMorphological and growth aspects of Tigertooth croaker (Otolithes ruber) were examined in order to assess differences between stocks of this species in the Persian Gulf and Oman Sea. The minimum and maximum total lengths of this species were 17.78 cm and 47.99 cm in the Oman Sea and 17.05 cm and 38.64 cm in the Persian Gulf respectively. Morphological measurements of fish (total length, standard length, weight) and otolith (length, width, weight, age) were compared by analysis in R software. The One-way ANOVA for each parameter showed significant differences between morphological characteristics (P<0.05). PCA analysis showed that all morphometric parameters have a high value (91.23%) for regional discrimination and the MANOVA test indicated that two areas based on comparison of all morphological characteristics have a significant difference with P≤0.05. For the Oman Sea, the LWR equation was (w= 0.00523TL, 3.1844) and for the Persian Gulf, it was (w= 0.001794TL, 3.5309). KDE showed that the Oman Sea has a larger age density than the Persian Gulf and there is a significant difference between regions (P<0.05). Our results suggest that the O. ruber from the Persian Gulf and Oman Sea are distinct biological stocks, and should be differently managed
Engineering Purse Line Hauler Machine For Hydraulic Axle Capstan On Mini Purse Seine Boat
Get PDFPurse seine or purse seine is one of the dominant fishing tools for catching pelagic (surface) fish which operates by circling schools (schooling) of fish. In the process of circling a school of fish, the bottom must be crimped immediately and quickly using a crimping rope or what is usually called a "drawstring" so that the fish remain in the circle and do not escape. This research was conducted from August to October 2019 on the north coast of Pekalongan, Java Sea. The application of hydraulically powered capstan axle crimp rope pulling machines on small scale vessels is expected to increase effectiveness, operational safety and efficiency of time and energy. Especially for purse seine ships <30GT and can increase catches which in turn can increase fishermen's income. Based on the test results, it was found that the driving diesel RPM without a pulling load = 1303 / 1530 RPM; Maximum RPM of the winding capstan spool when without a pulling load = 45 / 51.5 RPM; Maximum speed of winding capstan spools without tension load = 40.5 / 58.5 meters/minute; RPM of the driving diesel when pulling the purse seine line = 1500 RPM; Maximum RPM of the capstan winder spool when pulling the purse seine line at an average load = 43.2 RPM; Maximum RPM of the capstan winder spool when pulling the heaviest load (maximum) purse seine crimp rope = 40.1 RPM; Maximum pulling speed of the towing machine at the average load of pulling the purse seine crimp rope = 40.07 meters/minute; Maximum pulling speed of the towing machine when the heaviest load is pulling the purse seine crimp rope = 37.2 meters/minute; Load towing capability = detected ± 1000kg
Kesesuaian Konstruksi Jaring Insang Dasar Monofilamen yang Dioperasikan Nelayan Desa Tesabela Berdasarakan SNI 01-7214-2006
Get PDFJaring insang dasar monofilamen yang dioperasikan oleh nelayan Desa Tesabela umumnya dibuat sendiri sehingga terdapat variasi-variasi ukuran antar alat tangkap, selain itu juga penggunaan pemberat yang berbahan dasar batu dan dipasang pada tali pemberat sehingga adanya variasi berat pemberat dalam satu unit alat tangkap. Perbedaan ukuran tersebut akan mempengaruhi kinerja alat tangkap saat dioperasikan yang akan mempengaruhi jumlah hasil tangkapan. Tujuan penelitian ini untuk mendeskripsikan kesesuaian konstruksi jaring insang dasar monofilamen yang dioperasikan oleh nelayan Desa Tesabela dengan SNI 01-7214-2006. Penelitian ini dilaksanakan di pada bulan Oktober – Desember 2023 di Desa Tesabela, Kecamatan Kupang Barat, Kabupaten Kupang. Metode yang digunakan dalam penelitan ini, yaitu deskriptif. Hasil penelitian menunjukkan dari 11 kriteria ketentuan konstruksi jaring insang dasar monofilamen yang dioperasikan oleh nelayan Desa Tesabela dengan SNI 01-7214-2006 terdapat 10 kriteria yang belum memenuhi, yaitu 1) Hanging ratio datar, 2) Perbandingan panjang jaring terpasang dengan tinggi jaring terpasang, 3) Perbandingan diameter benang dengan mata jaring teregang, 4) Perbandingan daya apung dengan panjang tali ris atas, 5) Perbandingan daya tenggelam dengan panjang tali ris bawah, 6) Perbandingan daya tenggelam dengan daya apung, 7) Perbandingan jarak pelampung dengan tinggi jaring, 8) Perbandingan jarak pemberat dengan tinggi jaring, 9) Perbandingan jarak pelampung dengan panjang tali ris atas, 10) Perbandingan jarak pemberat dengan panjang tali ris bawah. Terdapat 1 kriteria yang memenuhi, yaitu perbandingan panjang jaring tali ris bawah dengan panjang tali ris atas.The monofilament bottom gill nets operated by Tesabela Village fishermen are generally made by themselves so that there are variations in size between fishing gear, in addition to the use of weights made from stone and attached to weight lines so that there are variations in the weight of the weight in one unit of fishing gear. The difference in size will affect the performance of the fishing gear when operated which will affect the amount of catch. The aim of this research is to describe the suitability of monofilament bottom gill net construction operated by Tesabela Village fishermen with SNI 01-7214-2006. This research was carried out in October – December 2023 in Tesabela Village, West Kupang District, Kupang Regency. The method used in this research is descriptive. The results of the research show that of the 11 criteria for the construction of monofilament bottom gill nets operated by Tesabela Village fishermen with SNI 01-7214-2006, there are 10 criteria that are not met, namely 1) Flat hanging ratio, 2) Comparison of the length of the installed net with the height of the installed net, 3) Comparison of the diameter of the thread with the stretched mesh, 4) Comparison of buoyancy with the length of the top rope, 5) Comparison of sinking power with the length of the bottom rope, 6) Comparison of sinking power with buoyancy, 7) Comparison of the distance between the float and the height of the net, 8) Comparison of the distance between the weights and the height of the net, 9) Comparison of the distance between the buoys and the length of the top rope, 10) Comparison of the distance between the weights and the length of the bottom rope. There is 1 criterion that is met, namely the ratio of the length of the lower ris rope net to the length of the upper ris rope
IMPLEMENTASI AKUAKULTUR BIRU MELALUI SISTEM IMTA (INTEGRATED MULTI-TROPHIC AQUACULTURE)
Get PDFPembangunan sektor kelautan dan perikanan masih jauh dari potensi yang dimiliki. Akuakultur sebagai salah satu unsur pada sektor tersebut juga belum dikelola dengan optimal. Padahal pengembangan akuakultur dituntut pada praktik manajemen yang baik, pengembangan teknologi yang lebih inovatif, bertanggung jawab, berkelanjutan, dan menguntungkan yang lebih efisien secara ekologis, ramah lingkungan, diversifikasi produk, dan bermanfaat bagi masyarakat. Mempertahankan keberlanjutan tidak hanya dari segi lingkungan, tetapi juga dari perspektif ekonomi, sosial, dan teknis, serta telah menjadi isu utama dengan meningkatnya kesadaran konsumen yang semakin menuntut kualitas, ketertelusuran, dan kondisi produksi. Oleh sebab itu, perlu dilakukan tinjauan terhadap konsep dan implementasi IMTA dalam mewujudkan akuakultur biru. Berdasarkan kajian ini, penerapan konsep akuakultur skema IMTA secara nyata memberikan keuntungan ekologi dan ekonomi serta berkelanjutan. Model IMTA sangat relevan dengan Program Prioritas Kementerian Kelautan dan Perikanan dalam mendukung pengembangan Akuakultur Biru.
ANALYSIS OF THE INFLUENCE OF LOAD UNBALANCED ON NEUTRAL CURRENT IN FISHING VESSEL ELECTRIC GENERATOR CASE STUDY AT KM. PULAU PINANG
Get PDFMany studies have been conducted on load imbalance in 3-phase electrical installations, but research on the effects of unbalanced electrical loads on 3-phase electrical installations in fishing vessel generators has not been carried out. This study aims to determine the percentage value of load imbalance in the 3-phase electrical installations of KM fishing vessels in Pulau Pinang and observe its effect on the emergence of electric current in the neutral conductor cable in the electrical installation. The Indonesian Classification Bureau (BKI) in Volume IV rules for 2019 and 2022 regarding Electrical Installation on Ships requires that, under normal operating conditions, the percentage value of load imbalance in each phase must not exceed 15%. The research was conducted in three stages: March, April, and June 2021. From the study results, it was found that the average percentage value for load imbalance in KM Pulau Pinang on March 12, was 15.73% with an average electric current value of 8 Amperes in the neutral conductor. On April 7, the average percentage of unbalanced load sharing was 23.42% with an average neutral current of 12.26 Amperes. On June 19, the average percentage of unbalanced load sharing was 16.02% with an average neutral current of 6.11 Amperes.This research can provide new information regarding the study of load sharing imbalance and electric current in 3-phase electrical installations on fishing vessels. It can also serve as an evaluation for ship owners in reducing power losses due to the emergence of electric currents in the neutral conductor
ANTIBACTERIAL ACTIVITIES OF MANGROVE PLANT EXTRACT (Rhizophora stylosa) TO THE GROWTH OF BACTERIA Vibrio parahaemolyticus
Get PDFVibrio parahaemolyticus is a gram-negative halophilic bacterium that lives in estuaries and beaches. These bacteria are agents that cause septicemia in shrimp during the larval and post larvae period. This study aims of this experiment is to determine the effect of mangrove leaf, root, stem and fruit extracts of Rhizophora stylosa growth of the V. parahaemolyticus bacteria. The experimental design used a completely randomized design (CRD) with positive control treatment (Papper disk containing chloramphenicol); Negative control (Papper disk containing methanol) P1 = mangrove extract 100 mg/L; P2 = 200 mg/L mangrove extract; P3 = 400 mg/L mangrove extract and in doing it on 3 times. The research parameter was measuring the bacterial inhibition zone. The results showed that the mangrove leaf, root, stem and fruit extracts of R. stylosa significantly affected on the inhibition zone and of high concentrations of the leaf, root, stem extract concentrations of R. stylosa mangrove fruit, the wider the bacterial inhibition zone. The concentration of 400 mg/L extracts of leaves, roots, stems and fruit heads of R. stylosa mangroves was the most effective concentration to inhibit the growth of V. parahaemolyticus bacteria, which showed an average root inhibition zone of 9.5 mm, leaves 7.7 mm, stems 6.5 mm, and fruit heads 4.8 mm
INVENTORY OF MACROZOOBENHTOS, WATER QUALITY AND SUBSTRATE IN THE MANGROVE ECOSYSTEM, DUMAI CITY, RIAU PROVINCE
Get PDFMacrozoobenthos has an important role in ecological functions in mangrove ecosystems which can be used as bioindicators in aquatic ecosystems. The purpose of this study was to inventory macrozoobenthos, water quality and substrate found at the study site. The method used in this study was the observation transect method of mangrove vegetation measuring 10 x 10 meters in which 5 sub-plots were made in the plot where each sub-plot measuring 1 x 1 meter. Macrozoobenthos samples were taken from the substrate, stems and roots of mangroves. Measurements of water quality parameters were taken in situ at each research station and the substrate was taken using a shovel and then observed for sediment particles in the Dumai Maritime and Fisheries Polytechnic laboratory. This study succeeded in infentarizing the macrozoobenthos of the Mollusc Phylum, class Gastropods with 6 families and 6 species (Nerita articulata, Chicoreus capucinus, Littorina scabra, Ellobium aurisjudae, Cerithidae quoyii and Pugilina cochlidium) and class Bivalvia, 1 family and 1 species (Polymesoda bengalensis). Water quality parameter values consist of an average temperature of 29.73 ˚C, a salinity of 26.33 ppt, dissolved oxygen (DO) 4.92 mg/l and a pH of 6.9. This water quality condition can still be tolerated by mangrove and macrozoobenthos plants. Substrate texture at stations 1 and 2 includes the clay loam category and station 3 the sandy loam category which has an influence on the abundance of macrozoobenthos