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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL ILMIAH PLATAX JURNAL PERIKANAN DAN KELAUTAN TROPIS Management Studies and Entrepreneurship Journal (MSEJ) JURNAL ILMU DAN TEKNOLOGI PERIKANAN TANGKAP Jurnal Ilmu Kelautan Lesser Sunda
Johnny Budiman
Fakultas Perikanan dan Ilmu Kelautan, Universitas Sam Ratulangi. Jl. Kampus Unsrat Bahu, Manado 95115, Sulawesi Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Mechanical Engineering Social Sciences

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Journal : JURNAL ILMIAH PLATAX

 1 
Study of the Use of Seagrass Bait on Bebihe Catches in the waters of the Sea Beg, South Central Tabukan District, Sangihe Islands Regency Larungkondo, Jerialdy; Labaro, Ivor Lembondorong; Pangalila, Fransisco P.T.; Budiman, Johnny; Manoppo, Lefrand; Silooy, Fanny
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

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Abstract

AbstractBubu fisheries have developed well in all Indonesian waters, especially in coastal areas that have coral reef and seagrass habitats. Generally, the commodities targeted for fishing are types of reef fish and seagrass beds that have a high selling value, such as snapper, grouper, baronang, yellowtail, lobster, octopus, and others. Bubu fishing gear or traps called bebihe local people are one of the fishing gear used to catch demersal fish or reef fish. The success of the bubu fishing operation is greatly influenced by the construction of the bebihe fishing gear itself and the treatment of the bait used. The use of seagrass bait, allegedly can increase the catching ability of the bebihe. However, scientific information on the use of seagrass as a bait for bebihe for fishing is not yet available. Therefore, the purpose of this study is to determine the effectiveness of seagrass baits with the comparison of kitefish in the operation of bebihe; and identify the types of fish caught.This research was carried out in the waters of Beeng Laut island, South Central Tabukan District, Sangihe Islands Regency; is based on experimental methods. Six bebihe units were operated during nine trips to collect data; where three units use seagrass bait of the type Thalassia hemprichii, and the other three units use kite fish bait; and then the catch data is analyzed by a t-test.The catch of bebihe during the study amounted to 363 heads, as many as 345 were caught with seagrass baits, and 18 were caught with kite baits. Analysis of the t-test showed that at t count = 5.480 > t table 0.05;8 = 2.306; where this explains that the use of seagrass bait on bebihe, gives a noticeablely different catch compared to kitefish bait.
Spatial And Temporal Analysis Of Sea Surface Temperature Variability And Chlorophyll-A Over Two Decades In North Sulawesi Waters Buana, Muhammad Candra; Patty, Wilhelmina; Mantiri, Rose O. S. E.; Budiman, Johnny; Rimper, Joice R.T.S.L.; Rangan, Jety K.; Sumilat, Deiske Adeliene
Jurnal Ilmiah Platax Vol. 12 No. 2 (2024): ISSUE JULY-DECEMBER 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i2.55621

Abstract

Sulawesi waters are directly affected by the dynamics that occur in the Pacific Ocean. The ENSO phenomenon that occurs in the Pacific Ocean can also be felt in the waters of the Sulawesi Sea. The dynamics of oceanographic parameters can cause climate change. The extreme impact of climate change is mainly the occurrence of rising temperatures and seasonal shifts. The purpose of this study is to analyze the variability of spatial and temporal anomalous distribution of sea surface temperature and chlorophyll-a. This study used monthly AQUA Modis image data, conducted by analyzing the spatial and temporal distribution of sea surface temperatures during the two decades of the period 2003 - 2022. This analysis is based on abnormal values obtained from subtracting parameter values from historical values (the average value of all data). The results of spatial variability analysis of sea surface temperature and chlorophyll –show anomalous variations occur in the western and transitional season periods I, while in the eastern season and transition II positive anomalous values dominate the eastern waters negative anomalies dominate the western waters opposite to chlorophyll – a. This study showed that there was an increase in sea surface temperature slope by 0.000840C / year while in chlorophyll - a there was a decrease in slope by 0.00072mg / m3 / year. Keywords: Spatial, Temporal, SPL, Chlorophyll – a, Climate Change. Abstrak Perairan Sulawesi mendapatkan pengaruh secara langsung dari dinamika yang terjadi di Samudera Pasifik. Fenomena ENSO yang terjadi di Samudera Pasifik juga dapat dirasakan dampaknya di perairan Laut Sulawesi. Dinamika parameter oseanografi dapat menyebabkan terjadinya perubahan iklim. Dampak ekstrem dari perubahan iklim terutama adalah terjadinya kenaikan temperatur serta pergeseran musim. Tujuan penelitian ini Menganalisis Variabilitas distribusi anomali spasial dan temporal dari suhu permukaan laut dan klorofil – a, Penelitian ini menggunakan data citra AQUA Modis bulanan, dilakukan dengan menganalisis sebaran spasial dan temporal suhu permukaan laut selama dua dekade periode 2003 - 2022. Analisa ini didasarkan pada nilai anomali yang didapat dari pengurangan nilai parameter dengan nilai historis (rerata nilai seluruh data). Hasil analisis variabilitas spasial suhu permukaan laut dan klorofil – a menunjukan variasi anomali terjadi pada periode musim barat dan peralihan I , sedangkan pada musim timur dan peralihan II nilai anomali positif mendominasi perairan sebelah timur anomali negatif mendominasi perairan sebelah barat sebaliknya dengan klorofil – a. Penelitian ini menunjukan bahwa terjadi peningkatan slope suhu permukaan laut sebesar 0,000840C/ tahun sedangkan pada klorofil - a terjadi penurunan slope sebesar 0,00072mg/m3/tahun. Kata kunci: Spasial, Temporal, SPL, Klorofil – a, Perubahan Iklim.
The length-weight relationship of the bigeye scad (Selar crumenophthalmus) captured by purseseiner from FMA 716 of North Sulawesi seawaters: A comparative study of the target species sizes on May and August 2022 Sitanggang, Effendi P.; Budiman, Johnny; Sitanggang, Dyan F. D.; Lohoo, Anneke V.; Kalalo, Flora P.
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.v14i1.66508

Abstract

Bigeye scad (Selar crumenophthalmus Bloch 1793) is rich source of proteins, Omega-3 fatty acids, and various important vitamins and minerals for human body, that makes the fish has an important economic value. Additionally, because of forming an important shoal on coastal seawaters, the fish is frequently captured, notably by purseseiners in an important quantity from the FMA 716 of North Sulawesi seawaters. The intensiveness captures of the fish may affect the sustainability and continuity life of the species. The research aims at analyzing some biological reproduction aspects of species based on gender and fishing season. The 400 samples, 200 tails on May and 200 tails on August 2022, have selected by a purposive random sampling from the captures. Data analisys refers to some common formulas, such as the length and weight size structure, sex and weight ratio, W-L relationship (W = aLb, W = weight, g), L = length (cmFL), a and b constants, condition factor (K), length at first capture (Lc50%). The legal size is determined by comparing the length at first capture (Lc50%) observed and at first maturity (Lm50%) reference. On May, the sample weight is 33,439 g (51.8% of 400 samples), the sex and weight ratios are 1:1.08 and 1:1.36 respectively with the conversion factor (cf) of 1.26. The average length and weight sizes are 21.62 ± 0.17 cm and 167.20 ± 5.15 g respectively, where the average weight per 1 cmFL is 7.67 ± 0.18 g. The L-W relationship follows W = 0.1492 L 3.0785 (r = 0.86) for male, W = 0.0566 L 3.8088 (r = 0.90) for female, and W = 0.0864 L 3.4940 (r = 0.91) for all, with K average of 1.60 ± 0.02 for male, 1.66 ± 0.03 for female, and 1.63 ± 0.02 for 200 samples. On August, the sample weight is 31,115 g (48.2% of 400 samples), the sex and weight ratios are 1:1.50 and 1:1.82 respectively, with cf of 1.21. The average length and weight sizes are 21.49 ± 0.16 cm and 155.58 ± 4.71 g respectively, where the average weight per 1 cmFL is 7.19 ± 0.17 g. The L-W relationship follows W = 0.1515 L 3.047 (r = 0.88) for male, W = 0.0789 L 3.5485 (r = 0.88) for female, and W = 0.0836 L 3.5023 (r = 0.90) for all samples, with K average of 1.50 ± 0.02 for male, 1.58 ± 0.03for female, and K of 1.55 ± 0.02 for 200 samples. On both fishing seasons, all captures are categorized a positive allometry (b>3) and 96.75% of captures has a legal size. All females have passed their first maturity stage. For this reason, the fishermen must consider carefully when they catch the fishes, outside of the two months. Considering the intensiveness of fishing activities to such species, it is indispensable since early for all stakeholders designing a regulation to limitate captutes by gender size and fishing seasons, for all species of high potential and economic value of high density of shoals. Key words: bigeye scad, biological reproduction aspects, FMA 716, North Sulawesi, fish conservationn
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.
Co-Authors A.A. Ketut Agung Cahyawan W Aglius RT Telleng Aglius T.R. Telleng Alfret Luasunaung Aminadab Faam Anneke V. Lohoo Arifin, Muhammad Z Buana, Muhammad Candra Carolus Paulus Paruntu Chalim, Moch. Abdul Cornelis F.T. Mandey Darmono, Oktaviano P. Deiske Adeliene Sumilat, Deiske Adeliene Deyne Rondonuwu Deysy M. Puansalaing Dien, Heffry Veibert Edwin D Ngangi Effendi P Sitanggang Effendi P. Sitanggang Elof M Katiandagho Emil Reppie Erick P. Majore, Erick P. Fanny Silooy Farnis B. Boneka Flora Pricilla Kalalo Fransisco P. T. Pangalila Gusari Sjamsuddin Henry J Kumajas Ilhamsyah Isrojaty J. Paransa Jersey R. Cumentas, Jersey R. Johny Wenno Joice R.T.S.L Rimper Joneidi Tamarol Joshian N.W. Schaduw Junianti J. Soleman K Karyanto Kalangi, Patrice Nelson I Kaparang Erens Karwur, Denny Kumaseh, Eunike Kusumaningrum, Arianda Labaro, Ivor Lembondorong Larungkondo, Jerialdy Lefrand Manoppo Lembo, Liliyana Lim, Julnando Lumempouw, Theodoor F. Lumingas, Lawrence L.J. Makapedua, Daisy M. Mamahit, Juliet Merry Eva Manahonas, Febrik Stopers Mandagi, Stephanus V. Manu, Lusia Markus Morin Markus T. Lasut Marliana, Isnaini Meta S. Sompie Modaso, Vivanda O. J. Mukhlis A Kaim Munib, Aflaha A. Murniati Tilik Onan Falen Dimara Pamikiran, Revols D. Ch. Paraeng, Pricilia Patrice N.I. Kalangi Paulus, Teddy Feky Pondaag, Maikel F. Rangan, Jety K. Rose O. S. E. Mantiri, Rose O. S. E. Samola, Arthur B. Sangari, Joudy R.R Singale, Aleks Rafid Sitanggang, Dyan F. D. Suniati Mokodompit, Suniati Thalib, Syahrul A. Veibe Warouw Wilhelmina Patty Wuaten, Julius Yan A Mathias