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INDONESIA
JURNAL ILMIAH PLATAX
Published by Universitas Sam Ratulangi
ISSN : 23023589     EISSN : -     DOI : -
Core Subject : Social,
Environmental Science
Mencakup Penulisan yang berhubungan dengan pelaksanaan penelitian yang dilakukan secara mandiri, atau kelompok, dan berdasarkan Ruang Lingkup Pengelolaan Wilayah Pesisir, Konservasi, Ekowisata, dan Keanekaragaman Hayati Perairan.
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Articles 21 Documents
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Search results for , issue "Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025" : 21 Documents clear
Community Structure of Macroalgae in the Coastal Waters of Tiwoho Village, Wori District, North Minahasa Regency Iyanleba, Jonathan Yohanes; Kepel, Rene Ch.; Tombokan, John Leonard; Kondoy, Khristin F. I.; Mandagi, Stephanus Vianny; Kambey, Alex D.
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.60693

Abstract

The purpose of this study is to describe the morphology and anatomy of each macroalgae species and to analyze the community structure of macroalgae from the study location. Data collection was carried out using the Line Transect method with quadrat sampling techniques conducted at the lowest tide. Temperature measurement was done using a thermometer and salinity using a refractometer, while substrate determination was visually assessed based on the type of substrate. The results of this study found 7 species, consisting of 1 species of red algae, 4 species of brown algae, and 2 species of green algae. The morphology of these algae types varies with different anatomies based on cross and longitudinal sections of each part of the algal thallus. The highest species density was Turbinaria ornata (transect 1), while the lowest density was Halimeda opuntia and Sargassum polycystum (transect 1), Turbinaria ornata (transect 2 and transect 3). The macroalgae diversity index values on the three transects were in the medium category. The species evenness index values on the three transects were stable. The species richness index values on the three transects were in the low category. The dominance index values on the three transects were in the low category. Keywords: Macroalgae, Community, Transect, Quadrat, Tiwoho. Abstrak Tujuan penelitian ini adalah mendeskripsikan morfologi dan anatomi masing-masing spesies makroalga, dan menganalisis stuktur komunitas makroalga dari lokasi penelitian. Pengambilan data menggunakan metode Line Transect dengan teknik sampling kuadrat yang dilakukan pada saat surut terendah. Pengukuran suhu menggunakan Termometer dan salinitas menggunakan Refraktometer, dan untuk penentuan substrat dilihat secara visual jenis dari substrat tersebut. Hasil penelitian ini ditemukan 7 spesies yang terdiri dari 1 spesies alga merah, 4 spesies alga coklat dan 2 spesies alga hijau. Morfologi jenis-jenis alga tersebut beragam dengan anatomi yang berbeda berdasarkan potongan melintang dan memanjang dari masing-masing bagian thallus alga. Kepadatan spesies tertinggi yaitu Turbinaria ornata (transek 1) sedangkan kepadatan terendah yaitu Halimeda opuntia dan Sargassum polycystum (transek 1), Turbinaria ornata (transek 2 dan transek 3). Nilai indeks keanekaragaman makroalga pada ketiga transek termasuk dalam kategori sedang. Nilai indeks kemerataan jenis pada ketiga transek termasuk dalam keadaan stabil. Nilai indeks kekayaan jenis pada ketiga transek termasuk dalam kategori rendah. Nilai indeks dominasi pada ketiga transek termasuk dalam kategori rendah. Kata kunci: Makroalga, Komunitas, Transek, Kuadrat, Tiwoho.
The Function Of Spatial Planning In Maintaining The Environmental Preservation Of West Pasaman District Rahmadani Siregar, Dewi; Azzahra, Nabila; Fajri, Muhammad; Amini, Aisyah; Hari Asri, Hazqan; Setiawan, Arif; Oktavia, Elfitri; Suhendrinal; Haryeni; Jelibseda; Nurhasan Syah; Heldi; Catri, Indra; Dewata, Indang; Barlian, Eri; Umar, Iswandi; Kamal, Eni
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.56208

Abstract

Abstract: This research examines the role of spatial planning in preserving the environment in West Pasaman Regency. The main aim of this research is to evaluate how the implementation of spatial planning can support environmental conservation efforts. The method used is qualitative descriptive analysis with a case study approach. Data was collected through in-depth interviews, field observations, and analysis of spatial planning documents. The research results show that good and well-planned spatial planning can reduce pressure on natural resources and improve the quality of the living environment. However, challenges such as weak law enforcement and low public awareness are still the main obstacles. In conclusion, the integration of spatial planning policies that pay attention to environmental aspects is very crucial to achieving sustainable development in West Pasaman Regency. Keywords: Environment; Spatial; Continuity;   Abstrak Penelitian ini menelaah peran tata ruang dalam menjaga kelestarian lingkungan hidup di Kabupaten Pasaman Barat. Tujuan utama dari penelitian ini adalah untuk mengevaluasi bagaimana implementasi tata ruang dapat mendukung upaya pelestarian lingkungan. Metode yang digunakan adalah analisis deskriptif kualitatif dengan pendekatan studi kasus. Data dikumpulkan melalui wawancara mendalam, observasi lapangan, dan analisis dokumen perencanaan tata ruang. Hasil penelitian menunjukkan bahwa tata ruang yang baik dan terencana dapat mengurangi tekanan terhadap sumber daya alam dan meningkatkan kualitas lingkungan hidup. Namun, tantangan seperti lemahnya penegakan hukum dan rendahnya kesadaran masyarakat masih menjadi hambatan utama. Kesimpulannya, integrasi kebijakan tata ruang yang memperhatikan aspek lingkungan sangat krusial untuk mencapai pembangunan berkelanjutan di Kabupaten Pasaman Barat. Kata Kunci : Lingkungan; Tata Ruang; Keberlanjutan;
Study of e-DNA Quality at Fishing Ground of Manado Bay, North Sulawesi Province. Zebua, Nistiarni; Mandagi, Ixchel F.; Masengi, K.W.A; Luasunaung, Alfret; Rumengan, Inneke F. M.; Wulur, Stenly; Makapedua, Daisy M.; Masengi, E. I. K.G.; Sumilat, Deiske A.; Masengi, Akira W. R.; Manoppo, Victoria
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.57404

Abstract

We used the Nansen Bottle Sampler to collect water samples in the deepsea area, ranging from 150 meters to 175 meters in six water points around Manado Bay, to test the quality of e-DNA water samples to detect target species in the fishing area. Therefore, the basis of the case study method with a sampling technique was carried out on July 29 2023 using Power Water Sterivex Kits, water samples were then stored at -250C and were then taken to TBRC, University of the Ryukyus for further laboratory works, such as; eDNA extract, eDNA quality testing, 1st and 2nd PCR and Electrophoresis eDNA analysis processes using MiFish-U primers with a target of 163–185bp and 375 bp, following the MiFish protocol.  Based on the results of the eDNA extract solution, it is known that the quality of eDNA from the 6 sampling sites locations ranged between 2.8 µg/mL – 4.4 µ g/mL, which means a good quality of eDNA. Moreover, it showed that the presence of DNA fragments at Kappa 60◦C Gelelectrophoresis 1st-PCR, 12S rRNA gene product (163–185bp), and Kappa 60◦C and 65◦C Geklelectrophoresis 2nd-PCR Products according to the target amplicon 375 bp. This means we can conduct the next step, the PCR sequence analysis.  Then, eDNA quality testing, 1st and 2nd PCR, and Electrophoresis of e-DNA analysis process were using MiFish-U F/R primers with a target of 375 bp, it is known that the concentration of Nanodrop from the 6 sampling locations ranges between 2.8 µg/mL – 4.4 µg/mL while the core or quality eDNA ranged from 1.56 µg/mL – 2.50 µg/mL. Based on identification results, five types of species were detected; Myctophum lychnobium, Selar crumenophthalmus, Photonectes sp., Oreochromis sp. Thunnus obesus and Homo sapiens were generated using eDNA metabarcoding on the mitochondria genome database MitoFish. Keywords: e-DNA, eDNA quality, species target, fishing area, Manado Bay   Abstrak Kami menggunakan Nansen Bottle Sampler untuk mengambil sampel air pada laut dalam berkisar 150meter sampai 175 meter di enam titik perairan Sekitar Teluk Manado, untuk menguji Kualitas e-DNA sample air yang digunakan untuk mendeteksi target spesies pada daerah penangkapan. Selanjutnya dasar metode studi kasus dengan teknik pengambilan sampel secara sampling dilakukan pada tanggal 29 Juli 2023 menggunakan Power Water Sterivex Kits, sapel air disimpan pada -250C yang selanjutnya dibawa ke TBRC, University of the Ryukyus untuk pnelitian laboratorium lanjutan seperti ekstrak eDNA, Pengujian kualitas eDNA, 1st and 2nd PCR dan Elektrophoresis proses analisis eDNA menggunakan primer MiFish-U dengan target 375 bp, mengikuti MiFish protokol. Berdasarkan hasil pengujian larutan ekstrak eDNA diketahui bahwa kualitas eDNA dari 6 titik lokasi sampling berkisar antara 2.8 ng/mL – 4.4 ng/mL dan menunjukkan adanya fragment DNA pada Kappa 60◦C Geklelectrophoresis 1st-PCR Produk 12S rRNA gene (163–185bp, dan Kappa 60◦C dan 65◦C Geklelectrophoresis 2nd-PCR Produk sesuai amplikon target 375 bp. Hal ini berarti dapat dilanjutkan pada tahap analisis sekuens PCR. Pengujian kualitas eDNA, 1st and 2nd PCR dan Elektrophoresis proses analisis eDNA menggunakan primer MiFish-U F/R dengan target 375 bp, diketahui bahwa konsentrasi Nanodrop dari 6 titik lokasi sampling berkisar antara 2.8 µg/mL – 4.4 µg/mL sedangkan kemurnian atau kualitas eDNA berkisar antara 1.56 µg/mL – 2.50 µg/mL. Hasil identifikasi menyatakan lima jenis spesies terdeteksi; Myctophum lychnobium, Selar crumenophthalmus, Photonectes sp., Oreochromis sp. Thunnus obesus, Homo sapiens dihasilkan dengan menggunakan eDNA metabarcoding pada MitoFish database genom mitokondria. Kata kunci : e- DNA, kualitas eDNA, target spesies, daerah penangkapan, Teluk Manado.
Priority Strategy for Mangrove Ecotourism Development at Budo Tourism Village Luturkey, Maureen Fenesya; Paruntu, Carolus Paulus; Rumengan, Antonius Petrus; Ompi, Medy; Sumilat, Deiske Adeleine; Manembu, Indri Shelovita
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study was conducted for three months, starting from March to June 2024. The research method used was a qualitative descriptive method with a survey technique.  Data collection was carried out by collecting primary data and secondary data.  Data analysis to formulate priority strategies for developing mangrove ecotourism at Budo Tourism Village using SWOT analysis (strength, weakness, opportunity, threat) and strategy choice analysis to obtain key success factors (priority strategies). The results of this research obtained 7 (seven) priority strategies that can be used by stakeholders, especially BUMDES managers in Budo Village for the development of sustainable mangrove ecotourism. To create a public policy, it is recommended to the Budo Village government, especially the BUMDES manager, to pay attention and consider academic studies from the Faculty of Fisheries and Marine Sciences, UNSRAT, in the form of 7 (seven) key success factors or priority strategies. Keywords: key success factors, mangrove ecotourism, SWOT, strategic choice analysis   Abstrak   Riset ini dilaksanakan di kawasan ekowisata mangrove Desa Wisata Budo dan berlangsung selama 3 bulan, dimulai dari bulan Maret sampai Juni 2024.  Metode riset yang digunakan yaitu metode deskriptif kualitatif dengan teknik survei.  Pengumpulan data dilakukan dengan mengumpulkan data primer dan data sekunder.  Analisis data untuk merumuskan strategi pengembangan ekowisata mangrove Desa Wisata Budo menggunakan analisis SWOT (strength, weakness, opportunity, threat) dan analisis pilihan strategi untuk memperoleh faktor-faktor kunci keberhasilan (strategi prioritas). Hasil penelitian ini memperoleh 7 (tujuh) urutan strategi prioritas yang dapat digunakan oleh stakeholders, khususnya pengelola BUMDES Desa Budo untuk pengembangan ekowisata mangrove yang berkelanjutan. Dalam rangka membuat suatu kebijakan publik direkomendasikan kepada pemerintah Desa Budo, khususnya pengelola BUMDES untuk memperhatikan dan mempertimbangkan kajian akademik dari Fakultas Perikanan dan Ilmu Kelautan Unsrat berupa 7 (tujuh) faktor-faktor kunci keberhasilan atau strategi prioritas tersebut. Kata kunci: Analisis pilihan strategi, ekowisata mangrove, faktor-faktor kunci keberhasilan, SWOT
Nudibranchia Species, Water Quality and Substrate at Malalayang Dua Beach, Manado City Dairivaldo, Kettang Legrant; Paulus, James J.H.; Lumuindong, Frans; Kemer, Kurniati; Pelle, Wilmy E.; Ompi, Medy
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.60767

Abstract

This research used the exploration method, where a dive team of three people descended to a subtidal depth of 3 to 10 meters. The dive team surveyed this site for 40 minutes. Measurements of environmental parameters seawater temperature, salinity, pH, dissolved oxygen (DO), Total Dissolved Solids (TDS), and turbidity—were taken using a Horiba U-536 and pH meter. The results identified 11 species. The average pH was 8.24 at Station A (Gasoline Station) and 8.06 at Station B (Malalayang Beach Walk). The average seawater temperature was 28.69°C at Station A and 29.08°C at Station B. Turbidity was 0 NTU at both stations. The dose of dissolved oxygen (DO) was 6.77 mg/L at Station A and 6.92 mg/L at Station B. The salinity was 31.49 ppt at Station A and 31.35 ppt at Station B. Except for TDS, all environmental parameters support Nudibranchia's life. Total Dissolved Solids (TDS) values were 57.73 g/L at Station A and 57.33 g/L at Station B, respectively. These TDS values are unsuitable for benthic marine life since they do not fit their range tolerances. Nudibranchia attached on substrates variations from dead coral with algae (DCA), sponge, algae, and dead coral fragments. The most dominant substrate occupied by Nudibranchia was dead coral with algae (DCA). Keywords: Nudibranchia, Species, Water Quality, Substrate, Malalayang Dua Abstrak Penelitian ini menggunakan metode eksplorasi, di mana tim penyelam yang terdiri dari tiga orang turun ke kedalaman subtidal 3 hingga 10 meter. Tim penyelam melakukan survei di lokasi ini selama 40 menit. Pengukuran parameter lingkungan seperti suhu air laut, salinitas, pH, oksigen terlarut (DO), Total Dissolved Solids (TDS), dan kekeruhan diambil menggunakan Horiba U-536 dan pH meter. Hasil penelitian mengidentifikasi 11 spesies. Rata-rata pH adalah 8,24 di Stasiun A (Gasoline Station) dan 8,06 di Stasiun B (Malalayang Beach Walk). Suhu air laut rata-rata adalah 28,69°C di Stasiun A dan 29,08°C di Stasiun B. Kekeruhan adalah 0 NTU di kedua stasiun. Oksigen terlarut (DO) adalah 6,77 mg/L di Stasiun A dan 6,92 mg/L di Stasiun B. Salinitas adalah 31,49 ppt di Stasiun A dan 31,35 ppt di Stasiun B. Kecuali untuk TDS, semua parameter lingkungan mendukung kehidupan Nudibranchia. Nilai Total Dissolved Solids (TDS) adalah 57,73 g/L di Stasiun A dan 57,33 g/L di Stasiun B. Nilai TDS ini tidak sesuai dengan toleransi kehidupan ‘benthic’ dasar. Dalam penelitian ini, diasumsikan bahwa konsentrasi TDS juga tidak sesuai untuk Nudibranchia. Nudibranchia menempel pada variasi substrat seperti dead coral with alga (DCA), spons, alga, dan pecahan karang mati. Substrat yang paling dominan ditempati oleh Nudibranchia adalah dead coral with alga (DCA). Kata Kunci: Nudibranchia, Jenis-jenis, Kualitas Air, Substrat, Malalayang Dua.
Macro And Micro Nutrients in The Soil of The Mangrove Forest Area, Bunaken Marine Park Anwar, Chairil; Wonggo, Djuhria; Mongi, Eunike; Dotulong, Verly
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.60807

Abstract

The purpose of this study is to determine the pH level and macro and micronutrient content in the soil of the mangrove forest area in Bunaken Marine Park, Meras Village, Wori District, North Sulawesi Province. Soil samples were collected from both dry soil and waterlogged soil. The samples were then taken to the laboratory for analysis of macro- and micronutrients as well as pH levels. The analysis used includes: Nitrogen (N) analysis following SNI 7763:2018, section 6.6.1; Phosphorus (P) analysis following SNI 7763:2018, section 6.7; Elements K, Ca, Fe, Mg, Cu, Zn, B, Mn, and Mo analyzed using IK-1.13 Method for Determination of Metal Minerals in Food and pH analysis using SNI 01-2891-1992. The research results show that the pH values of dry and waterlogged soil are 6.67 and 6.0, respectively, which are considered good categories. The macro-nutrient analysis results for N, P, K, and Mg are classified as good because they exceed the minimum requirements set by SNI 7763:2024. However, the Ca element is classified as not good as it exceeds the maximum limit specified by SNI 7763:2024. For micro-nutrients, Fe (Iron) content is 13,682 ppm, which falls under the good category since it is below the maximum limit of 15,000 ppm as per SNI 7763:2024. Zn (Zinc) content is 0.4807 ppm, which is also considered good, as it does not exceed the maximum limit of 5,000 ppm as per SNI 7763:2024. Keywords: Meras Mangrove Forest, Nutrients, pH. Abstrak Tujuan dari penelitian ini adalah untuk mengetahui kandungan pH, unsur hara makro dan mikro pada tanah kawasan hutan mangrove taman laut Bunaken desa Meras kecamatan wori propinsi sulawesi utara. Pengambilan sampel tanah diambil pada tanah yang kering dan tanah yang tergenang air. Sampel tanah dibawa ke laboratorium untuk dianalisa unsur hara makro, mikro dan pH. analisa yang digunakan adalah Analisa N dengan SNI 7763:2018 butir 6.6.1. Analisa P dengan SNI 7763:2018 Butir 6.7. unsur K, Ca Fe dan Mg, Cu, Zn, B, Mn dan Mo dengan metode IK-1.13 Penentuan Mineral Logam pada Pangan dan Non Pangan. Dan pH dengan metode SNI 01-2891-1992. Hasil penelitian bahwa nilai pH tanah kering dan tergenang adalah pH 6,67 dan 6,0. Termasuk kategori baik.  Hasil Analisa unsur makro yaitu N, P, K dan Mg adalah adalah katgori baik karena melebihi syarat minimum dari SNI 7763:2024, sedangkan nilai Ca kategori tidak baik karena melebihi batas maksimum SNI 7763:2024.  Unsur mikro Fe adalah 13682 ppm termasuk kategori baik karena mempunyai nilai lebih rendah dari 15.000 ppm sebagai batas maksimum dari SNI 7763:2024. Unsur Zn adalah 0.4807 ppm termasuk kategori baik karena tidak melebihi batas maksimum 5.000 ppm sebagai batas maksimum dari SNI 7763:2024. Kata kunci: Hutan Mangrove Meras, unsur hara, pH
Analysis of Mangrove Vegetation Index Using Landsat 8 Images in Dodinga Bay, West Halmahera Patty, Simon I.; Nurdiansah, Doni; Rizqi, Marenda Pandu; Akbar, Nebuchadnezzar; Huwae, Rikardo
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.60830

Abstract

Mangrove vegetation can be easily recognized from remote-sensing satellite images compared to other terrestrial vegetation. The vegetation index is applied to the satellite images to highlight the aspect of vegetation density. This study aims to determine the correlation between the value of the vegetation index and mangrove canopy cover data to achieve a proper vegetation index to estimate the density of the mangrove canopy. The data needed are satellite imagery from Landsat 8 and mangrove canopy cover in sampling locations along the coast of Dodinga Bay, West Halmahera. Image data analysis includes radiometric correction, image sharpening, masking, classification, and accuracy tests. The vegetation index algorithms used were NDVI, GNDVI, and IM, and regression analysis was carried out for correlation tests. The analysis results obtained four different land cover classes with an overall accuracy of 97.70% and a kappa coefficient of 0.9688. The IM vegetation index showed an excellent correlation with mangrove canopy cover compared to GNDVI and NDVI. The determination coefficient (R²) of the IM is 0.6765; GNDVI (0.4897) and NDVI (0.4825). The IM classification produces four levels of mangrove canopy density, i.e., sparse (7.40 ha), moderate (628.33 ha), dense (921.22 ha), and very dense (16.45 ha). Keywords: mangrove, Landsat 8 images, vegetation index, Dodinga Bay Abstrak Objek vegetasi mangrove paling mudah diidentifikasi dengan menggunakan citra satelit penginderaan jauh dibandingkan objek vegetasi darat lainnya. Indeks vegetasi diterapkan terhadap citra untuk menonjolkan aspek kerapatan vegetasi. Penelitian ini bertujuan mengetahui korelasi antara nilai indeks vegetasi dengan data tutupan kanopi mangrove, sehingga didapatkan indeks vegetasi yang sesuai untuk menduga kerapatan kanopi mangrove. Data yang diperlukan yaitu citra Landsat 8 dan tutupan kanopi mangrove di lapangan. Analisis data citra terdiri dari koreksi radiometrik, penajaman citra, masking, klasifikasi dan uji akurasi. Algoritma indeks vegetasi yang digunakan yaitu NDVI, GNDVI dan IM, serta dilakukan analisis regresi untuk uji korelasi. Hasil analisis mendapatkan empat kelas tutupan lahan yang berbeda dengan overall akurasi sebesar 97,70 % dan kappa coefisien sebesar 0,9688. Indeks vegetasi IM menunjukkan korelasi sangat baik dengan tutupan kanopi mangrove dibandingkan GNDVI dan NDVI. Koefisien determinasi (R²) IM adalah 0,6765; GNDVI (0,4897) dan NDVI (0,4825). Klasifikasi IM menghasilkan empat tingkat kerapatan kanopi mangrove yaitu mangrove jarang (7,40 ha), mangrove sedang (628,33 ha), mangrove lebat (921,22 ha), dan mangrove sangat lebat (16,45 ha). Kata kunci: mangrove, citra Landsat 8, indeks vegetasi, Teluk Dodinga
Ship Maintenance Techniques for Removing Sea Barnacles That Stick to the Ship's Hull Wijaya, Haryadi; Lefrandt , Lucia Ingrid Regina; Punuhsingon, Charles Stanley C.
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.60960

Abstract

The growth of marine biota such as barnacles attached to ship hulls is one of the main challenges in the shipping industry because it can increase hydrodynamic resistance, fuel consumption and accelerate corrosion of ship structures. This research aims to analyze the effectiveness of various ship maintenance techniques in removing sea barnacles and evaluate the advantages and challenges of each method used. The research method applied is a Systematic Literature Review (SLR) by analyzing previous studies discussing ship maintenance techniques in preventing and eliminating fouling. Data analysis was carried out using NVivo to identify research trends and VOSviewer to map relationships between methods used in previous studies. The research results show that the most effective approach in preventing the growth of barnacles is a combination of several methods, such as the use of silicone or fluorine-based paint which has low adhesion, ultrasonic technology which inhibits the colonization of marine biota, and a robot-based automatic cleaning system which can remove fouling without damaging the structure of the ship. This hybrid approach not only increases the fuel efficiency of ships but also helps reduce the impact of marine pollution due to the use of toxic chemicals. With the development of antifouling technology and the implementation of more innovative maintenance strategies, the shipping industry is expected to increase operational efficiency while supporting the long-term sustainability of the marine environment. Keywords: Ship Treatment, Antifouling, Ultrasonic Technology, Fouling, Hybrid Approach.
Induction Time And Sedative (Recovery) Time In Closed System Transportation Of Tawes Fish (Barbonymus gonionotus) Anesthetized With Clove Oil At Different Temperatures Saragih, Debby Dyanessa; Ngangi, Edwin L.A.; Pangkey, Henneke; Sumilat, Deiske Adeliene; Salindeho, Indra R.N.; Kreckhoff, Reni Lusia; Kusen, Diane Joula
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.60961

Abstract

The conservation of tawes fish (Barbonymus gonionotus) is carried out through aquaculture and restocking, where seed transportation is a crucial factor affecting survival rates. Mishandling during transport can increase stress, metabolism, and mortality risk. Reducing stress during transport can be achieved by using natural anesthetic agents such as clove oil (Eugenia aromatica) and low-temperature regulation. This study aims to analyze the effects of clove oil dosage and temperature on the induction time and recovery of tawes fish seeds. The experiment was designed using a completely randomized design (CRD) with two factors: clove oil dosage (0 ppm, 5 ppm, 10 ppm) and temperature (16–19°C and 24–27°C), with 18 experimental units (3 replications). Data were analyzed using ANOVA (JMP-SAS). The results showed that combining clove oil and temperature significantly affected induction and recovery times. The 10 ppm clove oil treatment at 16–19°C resulted in the fastest induction time, while the 0 ppm treatment at 24–27°C led to the fastest recovery. The interaction between these factors demonstrated that clove oil significantly influenced the fish's response to temperature changes. Keywords: tawes fish seed, transportation, temperature, clove oil, induction, sedative.   Abstrak   Pelestarian ikan tawes (Barbonymus gonionotus) dilakukan melalui budidaya dan restocking, di mana transportasi benih menjadi faktor krusial yang memengaruhi tingkat kelangsungan hidupnya. Kesalahan dalam penanganan dapat meningkatkan stres, metabolisme, dan risiko kematian benih. Upaya menekan stres selama transportasi dilakukan dengan penggunaan agen pembius alami, seperti minyak cengkih (Eugenia aromatica) dan pengaturan suhu rendah.Penelitian ini bertujuan menganalisis pengaruh dan dosis minyak cengkih serta suhu terhadap waktu induksi dan pemulihan (recovery) benih ikan tawes. Percobaan menggunakan rancangan acak lengkap (RAL) dengan dua faktor: dosis minyak cengkih (0 ppm, 5 ppm, 10 ppm) dan suhu (16–19°C dan 24–27°C), dengan 18 unit percobaan (3 ulangan). Data dianalisis menggunakan ANOVA (JMP-SAS).Hasil penelitian menunjukkan bahwa kombinasi minyak cengkih dan suhu berpengaruh signifikan terhadap waktu induksi dan pemulihan benih. Perlakuan 10 ppm minyak cengkih pada suhu 16–19°C menghasilkan waktu induksi tercepat, sedangkan tanpa minyak cengkih pada suhu 24–27°C mempercepat pemulihan. Interaksi kedua faktor ini menunjukkan bahwa minyak cengkih secara nyata mempengaruhi respons ikan terhadap perubahan suhu. Kata kunci: benih tawes, transportasi, suhu, minyak cengkih, induksi, sedatif.
Analysis Of Tsunami Hazard Potential On The Coast Of Bitung City, North Sulawesi Ulus, Frangky Octavian; Mandagi, Stephanus Vianny; Sumilat, Deiske Adeliene
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.60969

Abstract

This thesis aims to study the tsunami hazards in the Maluku Sea region, particularly in the coastal area of Bitung, Indonesia. The research focuses on modeling and analyzing the potential tsunamis triggered by earthquake events in that region. The data used includes bathymetry, topography, coastline, and river data obtained from the Geospatial Information Agency (Badan Informasi Geospatial-BIG). The tsunami modeling process utilizes the software COMCOT (Cornell Multi-grid Coupled Tsunami).  The earthquake source parameters (PusGen) used in the modeling, such as magnitude, focal depth, length of the fault plane, the width of the fault plane, dislocation of the fault plane, strike, dip, slip/rake, and modeling area, were obtained from worst-case scenarios based on PusGen's research results. The research consists of two main stages: the pre-verification stage, where data processing and tsunami modeling are conducted, and the verification stage, where field surveys are carried out to determine the coordinates for Temporary Evacuation Sites (TEP) and Final Evacuation Sites (FEP).  Various equipment, such as GPS, altimeters, stopwatches, cameras, and drones, are used during the field verification. The research procedures include a literature review, data collection of topography, bathymetry, earthquake parameters, and fault mechanism. Subsequently, tsunami modeling is conducted, and hazard analysis is performed based on the model results. Tsunami hazard maps are generated to highlight high-risk areas in the coastal region of Bitung, and evacuation routes are identified to prepare the coastal community of Bitung to face potential tsunami threats.  The research offers important information to assist in the development of warning systems and efficient evacuation strategies to protect the coastal community of Bitung from tsunamis' devastating impacts. Keywords: Tsunami; Bitung; coastal area; earthquake; PusGen

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