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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.
Arjuna Subject : -
Articles 517 Documents
 48   49   50   51   52 
Water Quality Analysis Seen from Macrobenthos (Gastropoda) Bioindicators in the Coastal Waters of Kotania Hamlet Arini, Ine; Smith, Alwi; Pattiasina, Eifan Boyke
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.67327

Abstract

Macrobenthos is a biological resource of water that lives at the bottom of the waters with characteristics that have a high level of sensitivity to changes in environmental quality as a bioindicator of pollution and environmental quality. The purpose of this study was to determine the diversity of macrobenthos as an indicator of pollution in the coastal waters of Kotania. Descriptive research with a random sampling method with a square transect. Data collection through observation of macrobenthos populations. The results of the macrobenthos diversity study obtained were in the Gastropoda class with six families namely Cerithiidae, Neritidae, Mitridae, Nassariidae, Littorinidae and Potamididae consisting of nine species namely Cerithium coniculatum, Nerita polita, Nerita patula, Nerita alveolus, Mitra pica, Nasarius pullus, Litorina scabra, Terebralia palustris and Telescopium telescopium, which shows its role as a potential bioindicator associated with dissolved oxygen, water clarity, and higher nutrient levels, indicating its suitability as an indicator of mild to moderate pollution conditions. These findings indicate that macrozoobenthos communities respond sensitively to land use changes and can effectively indicate variations in coastal water quality
Effectiveness of Organic Transport Media on Induction Time, Sedation Time, Survival, and Molting of Cherax quadricarinatus Tagema, Moh. Fauzan; Mulis; , Juliana
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.64304

Abstract

Cherax quadricarinatus is a high-value freshwater crustacean, yet live transportation remains a major challenge as it may reduce survival and induce physiological stress. This study aimed to evaluate the use of rice straw, coconut husk, and banana stem as organic packing media on induction time, sedation time, survival, and molting percentage of C. quadricarinatus juveniles. A completely randomized design was applied with three treatments (JP, SK, BP), each in triplicate, using a total of 90 juveniles (4–6 cm). Data were analyzed using ANOVA followed by the LSD test at a 95% confidence level. Results indicated that transport media influenced lobster physiological responses. Coconut husk resulted in relatively longer induction and sedation times, whereas banana stem yielded the highest survival rate and molting percentage. Although statistical differences were not significant, data trends confirmed the superiority of banana stem in maintaining moisture and physiological stability during transportation. This study recommends banana stem as an eco-friendly and effective organic medium for live transport of C. quadricarinatus juveniles. Keywords: Cherax quadricarinatus; dry transport; organic medium; survival Abstrak.  Cherax quadricarinatus merupakan spesies krustasea air tawar bernilai ekonomi tinggi, namun transportasi hidup masih menjadi kendala utama karena dapat menurunkan kelangsungan hidup serta memicu stres fisiologis. Penelitian ini bertujuan mengevaluasi pemanfaatan jerami padi, sabut kelapa, serta batang pisang sebagai media organik transportasi terhadap waktu induksi, waktu sedatif, survival, serta persentase molting benih C. quadricarinatus. Rancangan acak lengkap digunakan dengan tiga perlakuan media (JP, SK, BP) masing-masing tiga ulangan, menggunakan total 90 ekor benih berukuran 4–6 cm. Data dianalisis menggunakan ANOVA serta uji BNT pada taraf kepercayaan 95%. Hasil penelitian menunjukkan bahwa media berpengaruh terhadap kondisi fisiologis lobster. Sabut kelapa menghasilkan waktu induksi dan sedatif relatif lebih lama, sedangkan batang pisang menunjukkan survival tertinggi serta persentase molting lebih besar dibandingkan dengan perlakuan lain. Meskipun perbedaan statistik tidak signifikan, tren data menegaskan bahwa batang pisang lebih efektif mempertahankan kelembapan serta stabilitas fisiologis selama transportasi. Penelitian ini merekomendasikan batang pisang sebagai media transportasi organik ramah lingkungan untuk mendukung distribusi benih C. quadricarinatus. Kata kunci: Cherax quadricarinatus; transportasi kering; media organik; survival
Evaluation of Ecosystem-Based Small Pelagic Fisheries Management in Fish Resources Domains in North Sulawesi Waters as a Blue Economy Implementation Lasabuda, Ridwan; Wagey, Billy Theodrus; Kondoy, Khristin I.F
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.67154

Abstract

This study evaluates the management of small pelagic fisheries, specifically focusing on the mackerel scad (Decapterus macarellus), in North Sulawesi waters through the Ecosystem Approach to Fisheries Management (EAFM) framework within the Fish Resources Domain. Conducted at PPP Tumumpa, Manado, between March and November 2025, the research utilized surveys, interviews, and literature reviews. Performance was assessed using Multi-Criteria Analysis (MCA) across six key indicators: standardized CPUE, fish size trends, juvenile proportion, species composition, range collapse, and ETP (Endangered, Threatened, and Protected) species. The results indicate that management performance is highly effective, with a composite value of 85, placing it in the "Very Good" category. Key findings include a stable standardized CPUE (score 3) and a low proportion of juvenile catch at less than 30% (score 3),,. Other indicators, such as fish size trends, catch composition, and ETP species management, showed stable or moderate performance (score 2). These results demonstrate that fishery management in the region aligns with Blue Economy principles, ensuring sustainable resource utilization while maintaining ecosystem health. Keywords: small pelagic, North Sulawesi waters, EAFM, fish resource domain, blue economy Abstrak. Studi ini mengevaluasi pengelolaan perikanan pelagis kecil, khususnya ikan kembung (Decapterus macarellus), di perairan Sulawesi Utara melalui kerangka Pendekatan Ekosistem untuk Pengelolaan Perikanan (EAFM) dalam Domain Sumber Daya Ikan. Dilakukan di PPP Tumumpa, Manado, antara Maret dan November 2025, penelitian ini menggunakan survei, wawancara, dan tinjauan pustaka. Kinerja dinilai menggunakan Analisis Multikriteria (MCA) di enam indikator utama: CPUE standar, tren ukuran ikan, proporsi juvenil, komposisi spesies, penurunan jangkauan, dan spesies ETP (Terancam Punah, Terancam, dan Dilindungi). Hasil menunjukkan bahwa kinerja pengelolaan sangat efektif, dengan nilai komposit 85, menempatkannya dalam kategori "Sangat Baik". Temuan utama meliputi CPUE standar yang stabil (skor 3) dan proporsi tangkapan juvenil yang rendah di bawah 30% (skor 3). Indikator lain, seperti tren ukuran ikan, komposisi tangkapan, dan pengelolaan spesies ETP, menunjukkan kinerja yang stabil atau moderat (skor 2). Hasil ini menunjukkan bahwa pengelolaan perikanan di wilayah tersebut selaras dengan prinsip-prinsip Ekonomi Biru, memastikan pemanfaatan sumber daya yang berkelanjutan sambil menjaga kesehatan ekosistem. Kata kunci: ikan pelagis kecil, perairan Sulawesi Utara, EAFM, domain sumber daya ikan, ekonomi biru
Analisis Spasial Luas dan Kerapatan Mangrove Berbasis Sistem Informasi Geografis (SIG) di Desa Kayu Arang, Kabupaten Bangka Barat Akhrianti, Irma; Gustomi, Andi; Herdianingsih, Ajeng
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.67398

Abstract

The mangrove forest in Kayu Arang Village grows naturally and extends along the Kayu Arang River. This study aims to determine the area and density of mangrove vegetation in Kayu Arang Village, West Bangka Regency, using Sentinel-2A imagery. Mangrove sampling was conducted in 3 stations with 50 accuracy tests (Kappa). The image processing stages included atmospheric correction, image cropping, band composite preparation, supervised classification, NDVI (Normalized Difference Vegetation Index) transformation, test of Accuracy, ground check divided into sampling data to know the Important Value Index and Mangrove Condition based on two parameters (density and canopy). Based on the image processing of Sentinel-2A imagery in 2023, the mangrove forest in Kayu Arang Village was estimated to cover an area of 600,29 hectares, with NDVI values ranging from -0,22 to 0,91. Most of these NDVI values fall within the dense category, indicating that the mangrove vegetation is in very good and healthy condition, with the total of capling, sapling, and seedling density being 1444.44 ind/ha, 822,22 ind/ha, and 32222 ind/ha. The Highest IVI (Important Value Index) for various species at station 1 and station 2 was Rhizophora apiculata and Rhizophora mucronata, but at station 3 dominated by Exoecaria agallocha and Schyphiphora hydrophyllaceae. Key words: Mangrove Area; Density; Kayu Arang Village; Sentinel 2A Abstrak. Hutan mangrove di Desa Kayu Arang tumbuh secara alami dan menyebar di sepanjang Sungai Kayu Arang. Penelitian ini bertujuan untuk mengetahui luas dan kerapatan vegetasi mangrove di Desa Kayu Arang, Kabupaten Bangka Barat menggunakan citra Sentinel-2A. Pengambilan data mangrove dilakukan pada 3 stasiun pengamatan dengan 50 sampel diuji akurasi citra dengan metode kappa. Tahapan pengolahan citra terdiri dari koreksi atmosferik, pemotongan citra, penyusunan komposit band, klasifikasi terbimbing, transformasi indeks vegetasi (NDVI), uji akurasi citra dan verifikasi lapangan (pengambilan data komunitas vegetasi mangrove berdasarkan INP dan penentuan status kondisi mangrove berdasarkan kerapatan tegakan dan kanopi). Berdasarkan pemrosesan citra Sentinel-2A pada tahun 2023 di Desa Kayu Arang, Kabupaten Bangka Barat, diperoleh luas hutan mangrove sebesar 600,29 hektar, dengan nilai NDVI berada pada rentang -0,22 hingga 0,91. Sebagian besar nilai NDVI tersebut termasuk dalam kategori kerapatan lebat dan berada dalam kondisi baik/sehat dengan kerapatan tegakan pohon sebesar 1444.4 ind/ha, kerapatan anakan sebesar 822,22 ind/ha dan kerapatan semai sebesar 32222 ind/ha. INP tertinggi, baik kategori pohon, anakan, dan semai pada stasiun 1 dan stasiun 2 adalah Rhizophora apiculata dan R. mucronata, namun pada stasiun 3 didominasi oleh Excoecaria agallocha dan Schyphiphora hydrophyllaceae. Kata kunci: Kawasan mangrove; Kerapatan; Desa Kayu Arang Village; Sentinel 2A;
Effects of Tidal Dynamics on the Variation of Physicochemical Parameters in Bitung Port Waters Suputri, Putu Ayu; Rumampuk, Natalie Detty C.; Sumilat, Deiske A.; Pelle, Wilmy E.; Gerung, Grevo S.; Darmawan, Putu Deny; Niode, Burhan
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.67605

Abstract

This study aimed to evaluate the influence of tidal dynamics on the spatial and temporal variability of physicochemical parameters in Bitung Port waters. Sampling was conducted at three representative sites under high and low tide conditions. Parameters including temperature, pH, salinity, turbidity, DO, TDS, and conductivity were measured in situ, while TSS and heavy metals (Cu, Pb, Zn, Cd, and Ni) were analysed in the laboratory. Descriptive statistics, Kruskal-Wallis test, and Linear Mixed Model (LMM) were applied. Results showed that DO and pH were significantly higher during high tide, while turbidity, TDS, salinity, and conductivity were significantly higher during low tide. Spatial variability was low during high tide but increased significantly during low tide, indicating stronger local influence. The integration of interquartile range (IQR) analysis revealed higher variability of dissolved and suspended parameters during low tide, while DO exhibits higher variability during high tide due to intensified mixing processes. These findings highlight that tidal dynamics act as a key regulator of water quality distribution in semi-enclosed port systems. Incorporating tidal phase into monitoring strategies is essential for effective environmental management and supports the implementation of sustainable green port practices. Keywords: tidal dynamics, seawater quality, Bitung Port, physicochemical parameters, LMM Abstrak. Penelitian ini bertujuan untuk menganalisis bagaimana dinamika pasang surut memengaruhi variasi parameter fisika-kimia air laut, baik secara ruang maupun waktu, di perairan Pelabuhan Bitung. Pengambilan sampel dilakukan di tiga lokasi yang dianggap mewakili kondisi perairan, dengan mempertimbangkan fase pasang dan surut. Parameter yang diukur langsung di lapangan meliputi suhu, pH, salinitas, kekeruhan, DO, TDS, serta konduktivitas. Sementara itu, parameter seperti TSS dan kandungan logam berat (Cu, Pb, Zn, Cd, dan Ni) dianalisis di laboratorium. Data yang diperoleh kemudian dianalisis menggunakan statistik deskriptif, uji Kruskal-Wallis, dan Linear Mixed Model (LMM). Hasil penelitian menunjukkan bahwa nilai DO dan pH secara signifikan lebih tinggi pada saat pasang. Sebaliknya, kekeruhan, TDS, salinitas, dan konduktivitas cenderung meningkat pada saat surut. Dari sisi spasial, variasi parameter relatif kecil ketika pasang, namun meningkat saat surut, yang mengindikasikan kuatnya pengaruh faktor lokal. Analisis Interquartile Range (IQR) juga memperlihatkan bahwa parameter terlarut dan tersuspensi lebih bervariasi saat surut, sedangkan DO menunjukkan variasi lebih besar saat pasang akibat proses pencampuran yang lebih intens. Secara keseluruhan, hasil penelitian ini menegaskan bahwa dinamika pasang surut berperan penting dalam mengatur distribusi kualitas air di perairan pelabuhan semi-tertutup. Oleh karena itu, fase pasang surut perlu dipertimbangkan dalam kegiatan pemantauan lingkungan guna mendukung pengelolaan pelabuhan yang berkelanjutan. Kata kunci: pasang surut, kualitas air laut, pelabuhan Bitung, parameter fisika-kimia, LMM
Identification and Modeling of Illegal Fishing Violations in WPPNRI 715 Using Vessel Monitoring System Data Paulus, Teddy Feky; Manoppo, Lefrand; Kalangi, Patrice Nelson I; Sumilat, Deiske A.; Schaduw, Joshian Nicolas William; Budiman, Johnny; Mamahit, Juliet Merry Eva
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.67681

Abstract

This study aimed to analyze fishing activity characteristics based on Vessel Monitoring System (VMS) data, identify spatial patterns and hotspots of fishing violations in Fisheries Management Area of the Republic of Indonesia (WPPNRI) 715, and develop a VMS- and hotspot-based fisheries surveillance model. A quantitative descriptive method with a Geographic Information System-based spatial analysis approach was applied. The dataset consisted of fishing vessel VMS records and fishing violation data from 2022 to 2025 in WPPNRI 715. The analysis included data cleaning and validation, characterization by area, fishing gear, vessel size, and violation type, Kernel Density Estimation, Moran’s I spatial autocorrelation, Getis-Ord Gi* hotspot analysis, and risk-based surveillance modelling using Multi-Criteria Decision Analysis. The results identified 388 violation events concentrated mainly in Maluku, North Maluku, and North Sulawesi waters. The highest number of violations occurred in 2024, with 193 cases. Violations were dominated by small pelagic purse seine vessels with one boat (208 cases), while vessel size was dominated by 30-50 GT (149 cases) and 50-100 GT (123 cases). The most common violation types were fishing-lane violations (203 cases) and fishing-ground violations (156 cases). Moran’s I analysis produced a value of 0.1694, z-score of 2.3733, and pseudo p-value of 0.0237, indicating a statistically significant clustered pattern. Getis-Ord Gi* analysis identified significant hotspots in Maluku and North Maluku waters at the 95-99% confidence levels. The integration of hotspot analysis and MCDA classified Maluku and North Maluku waters as high-priority surveillance zones, North Sulawesi as a medium-priority zone, and West Papua as a low-priority zone. This study concludes that VMS data can support the identification of violation characteristics, hotspot mapping, and the development of risk-based fisheries surveillance in WPPNRI 715. Keywords: fisheries surveillance; Getis-Ord Gi*; IUU fishing; MCDA; Vessel Monitoring System; WPPNRI 715. Abstract.  Penelitian ini bertujuan menganalisis karakteristik aktivitas penangkapan ikan berbasis data Vessel Monitoring System (VMS), mengidentifikasi pola spasial dan hotspot pelanggaran penangkapan ikan di WPPNRI 715, serta menyusun model pengelolaan pengawasan perikanan berbasis VMS dan hotspot pelanggaran. Penelitian menggunakan metode deskriptif kuantitatif dengan pendekatan analisis spasial berbasis Sistem Informasi Geografis. Data yang dianalisis meliputi data VMS kapal penangkap ikan dan data pelanggaran penangkapan ikan periode 2022-2025 di WPPNRI 715. Tahapan analisis mencakup pembersihan dan validasi data, analisis karakteristik aktivitas berdasarkan wilayah, alat tangkap, ukuran kapal, dan jenis pelanggaran, analisis kepadatan Kernel Density Estimation, autokorelasi spasial Moran’s I, analisis hotspot Getis-Ord Gi*, serta penyusunan model pengawasan berbasis risiko dengan pendekatan Multi-Criteria Decision Analysis. Hasil penelitian menunjukkan terdapat 388 kejadian pelanggaran yang terkonsentrasi terutama di Perairan Maluku, Maluku Utara, dan Sulawesi Utara. Pelanggaran tertinggi terjadi pada 2024 sebanyak 193 kasus. Berdasarkan alat tangkap, pelanggaran didominasi pukat cincin pelagis kecil dengan satu kapal sebanyak 208 kasus, sedangkan berdasarkan ukuran kapal didominasi kapal 30-50 GT sebanyak 149 kasus dan 50-100 GT sebanyak 123 kasus. Jenis pelanggaran terbanyak adalah pelanggaran jalur penangkapan sebanyak 203 kasus dan daerah penangkapan ikan sebanyak 156 kasus. Analisis Moran’s I menghasilkan nilai 0,1694, z-score 2,3733, dan pseudo p-value 0,0237, yang menunjukkan pola pelanggaran mengelompok secara signifikan. Analisis Getis-Ord Gi* mengidentifikasi hotspot signifikan pada Perairan Maluku dan Maluku Utara dengan tingkat kepercayaan 95-99%. Integrasi hotspot dan MCDA menghasilkan prioritas pengawasan tinggi pada Perairan Maluku dan Maluku Utara, sedang pada Perairan Sulawesi Utara, dan rendah pada Perairan Papua Barat. Penelitian ini menyimpulkan bahwa data VMS dapat digunakan sebagai dasar identifikasi karakteristik pelanggaran, pemetaan hotspot, dan penyusunan model pengawasan perikanan berbasis risiko di WPPNRI 715. Kata kunci: Getis-Ord Gi*; IUU fishing; MCDA; pengawasan perikanan; Vessel Monitoring System; WPPNRI 715.
Stock Status for Sustainable Management of Small Pelagic Fish Targeted in Minahasa Peninsula Waters Lohoo, Anneke V.; Silloy, Fanny; Sitanggang, Effendie Panghutan
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.67752

Abstract

This study aims to determine the size of pelagic fish at first sexual maturity as a basis for analyzing the balance between immature and mature fish in the catch. The mesh size of the fishing gear is also assessed to determine whether it aligns with the height of mature fish. Both of these factors are crucial for ensuring sustainable management of small pelagic fish targeted in Minahasa Peninsula waters. Monitoring of small pelagic fish stocks can be conducted by analyzing the length-weight and gonad maturity levels of small pelagic fish. The conditions at capture are compared to the minimum size, maximum size, and size at gonad maturity of fish in specific waters. The analysis in this study compares fish sizes from two fishing grounds: Sulawesi waters (TPI Tumumpa) and Maluku waters (TPI Aertembaga). This research provides an overview of small pelagic fish stocks in terms of sustainability. This aligns with the research areas of excellence at Sam Ratulangi University. Keywords: pelagic; sustainable; sexual maturity; fish Abstrak Penelitian ini bertujuan menentukan ukuran ikan pelagis pertama kali matang kelamin sebagai dasar menganalisis keseimbangan jumlah ikan berukuran belum dan sudah matang kelamin pada ikan hasil tangkapan. Menilai ukuran mata jaring pada alat tangkap apakah sudah sesuai dengan ukuran tinggi badan ikan yang sudah matang kelamin. Kedua hal di atas penting agar bisa menjamin kegiatan pengelolaan berkelanjutan pada ikan pelagis kecil sebagai ikan target di perairan Minahasa Peninsula. Pemantauan stok ikan pelagis kecil dapat dilakukan dengan analisis ukuran panjang-berat dan tingkat kematangan gonad dari ikan pelagis kecil. Kondisi saat tertangkap akan dibandingkan dengan ukuran minimum ikan, ukuran maksimum ikan, dan ukuran saat matang gonad ikan di perairan tertentu. Analisis pada penelitian ini dilakukan dengan membandingkan ukuran ikan dari dua daerah penangkapan, yakni perairan Sulawesi (TPI Tumumpa) dan perairan Maluku (TPI Aertembaga). Penelitian ini menghasilkan gambaran stok ikan pelagis kecil dalam kaitan dengan kebelanjutannya. Hal ini sesuai dengan bidang unggulan penelitian dari Universitas Sam Ratulangi. Kata kunci: pelagis; berkelanjutan; matang kelamin; ikan

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