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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL ILMIAH PLATAX Jurnal Teknik Informatika JURNAL PERIKANAN DAN KELAUTAN TROPIS ILMU KELAUTAN: Indonesian Journal of Marine Sciences Jurnal Perikanan Universitas Gadjah Mada Vivabio : Jurnal Pengabdian Multidisiplin
Wilhelmina Patty
Fakultas Perikanan Dan Ilmu Kelautan, Universitas Sam Ratulangi Manado
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Environmental Science Immunology & microbiology Library & Information Science Public Health

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Journal : JURNAL ILMIAH PLATAX

 1 
Comparison of Catch and Fish Interest in Surface LED Lights and Underwater LED Lights at FADs around Rafts in Manado Bay Laian, Natalis; Patty, Wilhelmina; Kalangi, Patrice Nelson I.
Jurnal Ilmiah Platax Vol. 11 No. 1 (2023): ISSUE JANUARY-JUNE 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i1.43939

Abstract

Manado Bay waters is one of the water areas in North Sulawesi that has potential fishery resources, with fishing efforts using rafts mounted on surface electric lights. For high FAD usefulness, the light used must be able to collect fish that are at great distances both horizontally and vertically. The purpose of this study was to obtain the composition of the fish caught and how much the fish was determined to be when the raft was without lights in the water and when the raft was equipped with lights in the water. The method used was an experiment using 2 (two) types of lights, namely electric surface lights and LED lights in water, and 3 (three) types of fishing gear, namely fishing rods, ring seines and nets). The types of fish caught were dominated by selar fish (Selaroides sp), moonfish (Lampris guttaus), Trevally fish (Caranx sp) and squid (Loligo sp). The fish's interest in the light was observed since the first 15 minutes the lights were turned on, and were around 4 to 6 meters and the longer they were getting closer to the lights for about 1 hour the fish would cluster around the raft for about 2-4 meters. Keywords: FAD, Underwater lamp, Manado Bay. Abstrak Perairan Teluk Manado merupakan salah satu kawasan perairan di Sulawesi Utara yang memiliki sumberdaya perikanan yang potensial, dengan usaha penangkapan ikan dengan alat bantu rakit yang dipasang lampu listrik permukaan. Untuk daya gunanya rumpon yang tinggi, maka cahaya yang digunakan harus mampu mengumpulkan ikan yang berada pada jarak yang jauh baik horisontal maupun vertikal. Tujuan penelitian ini adalah mendapatkan komposisi hasil tangkapan ikan dan berapa dalam ketetapan ikan saat rakit tanpa lampu dalam air dan saat rakit dilengkapi lampu dalam air Metode yang digunakan adalah experimen dengan menggunakan 2 (dua) tipe lampu yakni lampu listrik permukaan dan lampu LED dalam air, dan 3 (tiga) jenis alat tangkap yakni pancing, pukat cincin dan jaring). Jenis ikan yang tertangkap didominasi berturut-turut oleh ikan selar (Selaroides sp), ikan moonfish (Lampris guttaus), ikan bobara (Caranx sp) dan cumi-cumi (Loligo sp). Ketertarikan ikan pada cahaya lampu teramati sejak 15 menit pertama dinyalakan lampu, dan berada di sekitar 4 sampai 6 meter dan semakin lama akan semakin mendekat ke lampu kira kira selama 1 jam ikan akan bergerombol di sekitar rakit sekitar 2 – 4 meter. Kata Kunci: Rakit, Lampu Dalam AIr, Teluk Manado.
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.
Variability Of Chlorophyll-A and Sea Surface Temperature in The Maluku Sea During El Nino Period 2023 Leksono, Anindito; Patty, Wilhelmina; Manu, Lusia; Rumengan, Inneke Fenny Melke; Budiman, Johny; Lumuindong, Frans
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.v13i1.57199

Abstract

Oceanographic factors such as Sea Surface Temperature (SST) and Chlorophyll-a (Chl-a) during El Nino can make fishing easier. The research aims to analyze the variability of SST and Chl-a in the Maluku Sea during El Nino 2023 and determine the influence of El Nino on upwelling in the Maluku Sea. The method used uses SST from Remote Sensing data which has been validated using observation and Chl-a data. Rainfall data is used to ascertain the climatic conditions of the North and South Maluku Sea regions. Validation of remote sensing SST data with observations has a correlation coefficient of 0.677. The research results show that in the West Monsoon of North Maluku, the SST was 29.1ºC and Chl-a 0.24 mg/m3 due to the influence of La Nina 2022 as shown by the rainfall in February of 199 mm. During the transition monsoon, the SST in the North Maluku Sea is 29.3 ºC higher than the South 29.8ºC. The East Monsoon SST in the Southern Maluku Sea experiences a decrease in temperature reaching 27.9 ºC and Chl-a of 075 mg/m3. Transition Monsoon II SST is 30ºC and Chl-a 0.21 mg/m3. The research concludes that the El Nino phenomenon that will occur in 2023 will affect upwelling in the Maluku Sea by 84%. There is a mismatch between the Chl-a peak in August SST and the SPL peak that occurred in September. When El Nino 2023 occurs, Chl-a is higher in the southern part of the Maluku Sea compared to the northern part, as is the SST. Keywords: SST, Chl-a, East monsoon, El Nino, Upwelling Abstrak Mengetahui faktor oseanografi seperti Suhu Permukaan Laut (SPL) dan Klorofil-a (Chl-a) saat El Nino dapat mempermudah penangkapan ikan. Tujuan penelitian untuk menganalisis variabilitas SPL dan Chl-a di Laut Maluku saat terjadi El Nino 2023 dan mengetahui pengaruh El Nino terhadap upwelling di Laut Maluku. Metode yang digunakan menggunakan data Penginderaan Jauh SPL yang telah di validasi menggunakan data obsevasi dan Chl-a. data curah hujan digunakan untuk memastikan kondisi iklim wilayah Laut Mauluku bagian Utara dan Selatan. Validasi data SPL penginderaan jauh dengan observasi memiliki korefisien korelasi sebesar 0.677. Hasil penelitian menunjukan bahwa pada Musim Barat Laut Maluku bagian Utara dengan SPL 29.1ºC dan Chl-a 0.24 mg/m3 dikarenakan pengaruh La Nina 2022 yang ditunjukkan dari curah hujan bulan Februari sebesar 199 mm. Saat Musim peralihan SPL di Laut Maluku bagian Utara 29.3 ºC lebih tinggi dari bagian Selatan 29.8ºC. Musim Timur SPL di Laut Maluku bagian Selatan mengalami penurunan suhu mencapai 27.9 ºC dan Chl-a sebesar 075 mg/m3. Musim Peralihan II SPl sebesar 30ºC dan Chl-a 0.21 mg/m3. Kesempulan penelitain adalah ini Fenomena El Nino yang terjadi pada tahun 2023 mempengaruhi upwelling di laut maluku sebasar 84%. Terjadi ketidak seuaian antara puncak Chl-a bulan Agustus SPL dengan puncak SPL yang terjadi bulan September. Saat terjadi El Nino 2023 Chl-a lebih tinggi di Laut Maluku bagian Selatan jika dibandingkan bagian Utara, begitu pula dengan SPL. Kata kunci: SPL, Chl-a, Musim Timur, El Nino, Upwelling
Comcot 1.7 Modeling To Estimate The Maximum Height And Arrival Time Of The Tsunami In Tombariri Sub-District Bakri, Abu; Angmalisang, Ping Astony; Kemer, Kurniati; Patty, Wilhelmina; Pamikiran, Revols Dolfi CH; Taher, Nurmeilita
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.v13i1.57487

Abstract

Tombariri Sub-District is located on the North Coast of the Minahasa Peninsula, directly opposite the North Sulawesi Subduction. North Sulawesi subduction has the potential for earthquakes with a targeted magnitude of M8.5 that can generate tsunamis. In addition, Tombariri Sub-District has a fairly large population density and is located on the coast. This causes the Tombariri Sub-District to be highly vulnerable to tsunami hazards. This study aims to determine the tsunami's estimated maximum height and arrival time. The modeling method in this study is through the Comcot 1.7 application with the worst-case scenario of North Sulawesi Subduction M8.5. The results of this study showed that the maximum height of the tsunami reached 6.17 m. The estimated time of tsunami arrival in Tombariri District ranges from 5-10 minutes. The results of this study can be used as a means of mitigating tsunami disasters. Keywords: Comcot, Tsunami Modeling, Inundation, Numeric Simulation Abstrak Kecamatan Tombariri terletak di wilayah Pesisir Utara Semenanjung Minahasa yang berhadapan langsung dengan Subduksi Sulawesi Utara. Subduksi Sulawesi Utara memiliki potensi gempabumi dengan magnitudo tertarget M8.5 yang dapat membangkitkan tsunami. Selain itu, Kecamatan Tombariri memiliki kepadatan penduduk yang cukup besar dan berada di wilayah pesisir. Hal ini menyebabkan Kecamatan Tombariri memiliki tingkat kerawanan terhadap bahaya tsunami yang tinggi. Penelitian ini bertujuan untuk mengetahui estimasi ketinggian maksimum dan waktu tiba tsunami. Metode pemodelan dalam penelitian ini melalui aplikasi Comcot 1.7 dengan skenario terburuk Subduksi Sulawesi Utara M8,5. Hasil dari penelitian ini menunukkan bahwa tinggi maksimum tsunami mencapai 6,17 m. Estimasi waktu tiba tsunami di Kecamatan tombariri berkisar antara 5 - 10 menit. Hasil dari penelitian ini dapat digunakan sebagai sarana mitigasi bencana tsunami. Kata Kunci : Comcot, Pemodelan tsunami, Simulasi Numerik.
Co-Authors A.A. Ketut Agung Cahyawan W Adnan Wantasen Adrie A. Tarumingkeng Adrie Tarumingkeng Agustinus Jacobus Alfret Luasunaung Andika La Ode Andri Ramdhani Angmalisang, Ping Astony Anindito Leksono Bakri, Abu Buana, Muhammad Candra Calvyn F. A. Sondak, Calvyn F. A. Deiske Adeliene Sumilat, Deiske Adeliene Djainudin Alwi, Djainudin Donny Tulengen Dringhuzen J. Mamahit Edwin D Ngangi Emil Reppie Emil Reppie F. E. Kaparang, F. E. Fanny Silooy Fycki Fendi Imbir, Fycki Fendi Gaspar Manu Gohao, Leonard H. Bawuno Husain, Herianto Inneke F. M Rumengan Johnny Budiman Johny Budiman Johny Wenno Joice R.T.S.L Rimper Joshian N.W. Schaduw Kalangi, Patrice Nelson I. Kurniati Kemer Laian, Natalis Lasut, Astrid Y. Lit Nickson Dey Lumuindong, Frans Manu, Lusia Notanubun Julianus Nurmeilita Taher Pamikiran, Revols Dolfi Ch Pangalila, Fransisco Patrice N.I. Kalangi Rachim, M. Hatta Rangan, Jety K. Ricky Daniel Aror Robert A. Bara Rose O. S. E. Mantiri, Rose O. S. E. Sherwin R.U.A Sompie Sompie, Sherwin Tarumingkeng, Theofilio Veibe Warouw Yulita Anggaseng