Article Per Year (5 Year)
p-Index From 2021 - 2026
2.233
P-Index
This Author published in this journals
All Journal Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut AQUATIC SCIENCE & MANAGEMENT e-Journal BUDIDAYA PERAIRAN JURNAL ILMIAH PLATAX
Manu, Lusia
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

Published : 13 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 13 Documents
Search

 1   2 
HULL REDESIGN AND ITS EFFECT ON THE RESISTANCE OF MANADO PROTOTYPE SMALL PURSE SEINER: Rancang Ulang Desain Lambung dan Pengaruhnya terhadap Tahanan Gerak Kapal Pukat Cincin Kecil Manado Pamikiran, Revols D. Ch.; Manoppo, Lefrand; Dien, Heffry; Manu, Lusia
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol. 15 No. 1 (2024): Marine Fisheries: Journal of Marine Fisheries Technology and Management
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jmf.v15i1.49865

Abstract

This research aims to determine the effect of redesigning the hull of a small purse seine ship on its motion resistance. The research was carried out using a small purse seine ship prototype in Manado by changing the length-breath-depth ratio based on the main dimensions of the ship, resulting in three new hull designs coded K-0 (prototype), K-1, K-2, and K- 3. Maxsurf modeler and Maxsurf resistance were used to run a simulation set of three loading conditions (light, half, full) and speed (low, medium, high). The research results show that changes in ship hull design affect the resistance and thrust of the ship. There is a difference in resistance between the ship with the redesigned hull and the prototype, where the smallest difference is shown by K-3. In addition to changes in hull design, changes in ship loading conditions, Froude number, and ship speed lead to increases in ship resistance and thrust. Based on the average allowance (sea margin or service margin) in shipping lanes, the need for propulsion power and the number of propulsion power vessels K-0 (prototype) and K-3 are still better than K-1 and K-2. Keywords: purse-seiner, resistance, speed, propulsion
Spatial Analysis of Shallow Sea Benthic Habitats Based on Sentinel-2A Imagery in the Southern Waters of Manado Bay Putra Antou, Kevin; Rondonuwu, Ari B.; Rembet, Unstain N. W. J.; Modaso, Vivanda O. J.; Manu, Lusia; Kemer, Kurniati
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.v14i1.66137

Abstract

The southern coastal region of Manado Bay is experiencing intensive development pressure alongside increasing tourism activities and marine space utilization. These conditions have the potential to cause degradation of shallow-water benthic habitats, which play a vital ecological role. This study aims to map and analyze the spatio-temporal changes of shallow-water benthic habitats in southern Manado Bay using Sentinel-2A satellite imagery as the primary data source. Analysis was conducted using Sentinel-2A imagery from the 2017-2023 period through stages of image pre-processing, water column correction, and unsupervised classification using the K-means algorithm. Evaluation of the classification results was performed using an error matrix to obtain overall accuracy and Kappa coefficient values. The results indicate that the overall accuracy ranged from 72-78% with Kappa coefficients between 0.60-0.71. Spatio-temporal analysis indicates a significant decline in live coral cover from 41.09% to 28.17% during the 2017-2023 period, accompanied by an increase in dead coral area and sand substrates. These findings demonstrate that Sentinel-2A imagery can be effectively utilized for monitoring the dynamics of shallow-water benthic habitats at a regional scale and has the potential to support sustainable coastal zone planning and management. Keywords: Change Detection, Coastal Management, Sentinel-2A, Benthic Habitat. Abstrak. Wilayah pesisir selatan Teluk Manado mengalami tekanan pembangunan yang intensif seiring dengan meningkatnya aktivitas pariwisata dan pemanfaatan ruang laut. Kondisi ini berpotensi menyebabkan degradasi habitat bentik perairan dangkal, yang memainkan peran ekologis vital. Studi ini bertujuan untuk memetakan dan menganalisis perubahan spasial-temporal habitat bentik perairan dangkal di selatan Teluk Manado menggunakan citra satelit Sentinel-2A sebagai sumber data utama. Analisis dilakukan menggunakan citra Sentinel-2A dari periode 2017-2023 melalui tahapan pra-pemrosesan citra, koreksi kolom air, dan klasifikasi tanpa pengawasan menggunakan algoritma K-means. Evaluasi hasil klasifikasi dilakukan menggunakan matriks kesalahan untuk mendapatkan akurasi keseluruhan dan nilai koefisien Kappa. Hasil menunjukkan bahwa akurasi keseluruhan berkisar antara 72-78% dengan koefisien Kappa antara 0,60-0,71. Analisis spasial-temporal menunjukkan penurunan signifikan pada tutupan karang hidup dari 41,09% menjadi 28,17% selama periode 2017-2023, disertai dengan peningkatan luas karang mati dan substrat pasir. Temuan ini menunjukkan bahwa citra Sentinel-2A dapat dimanfaatkan secara efektif untuk memantau dinamika habitat bentik perairan dangkal pada skala regional dan berpotensi mendukung perencanaan dan pengelolaan zona pesisir yang berkelanjutan. Kata kunci: Deteksi Perubahan, Pengelolaan Pesisir, Sentinel-2A, Habitat Bentik
Analysis of Ship Motion Response to Hull Line Redesign of The Manado Prototyped Small Purse Seiner Dien, Heffry Veibert; Pamikiran, Revols Dolfi Christian; Manu, Lusia; Undap, Nani Ingrid Jacquline; Pangalila, Fransisco Philep Theodorus; Manoppo, Lefrand
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol. 17 No. 1 (2026): Marine Fisheries: Journal of Marine Fisheries Technology and Management
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/1skscw50

Abstract

Hull line determines the ship motions in adapting to the ocean conditions, and therefore, ships require a flexibly appropriate hull line to have a highly safe sailing trip.   This study aims to determine influence of small purse-seiner hull line redesign on the ship's motion, namely rolling, heaving, and pitching which can be observed as a Response Amplitude Operator (RAO) due to the sea conditions. The hull lines were redesigned by manipulating the ship's breadth (B) and depth (D) based on the Manado prototype, resulting in three new hull forms (ships B, C, D) and one prototype control (ship A). Data input and simulation used the Maxsurf Modeler Advanced and Maxsurf Motions Advanced applications to analyze motion responses at different wave angles (head sea 180°, bow quartering sea 135°, and beam sea 90°) under average load and service speed conditions. The findings demonstrated that each ship had a unique RAO for heave, roll, and pitch motion. In heave and pitch motion, ship D had a best RAO, but in roll motion, ship C had the best RAO. The rolling and pitching motions of all ships have met the minimum standard of the general operability limiting criteria for ships at all conditions, while the rolling motion at the wave coming of 90° was met at the slight and moderate conditions. Keywords:       Heaving motion, North Sulawesi-Indonesia, pitching motion, rolling motion, ship motion
Co-Authors Adnan Wantasen Alfret Luasunaung Ali, Isti Utami Indah Sari Angmalisang, Ping Astony Anindito Leksono Ari B. Rondonuwu Azani, Audia Azizah Cyska Lumenta Dien, Heffry Veibert Effendi P. Sitanggang Gaspar D. Manu, Gaspar D. Ginting, Jebry Yanta Hariawan, Mutiara G. V. Husain, Herianto Indra R. N. Salindeho Indri Manembu Inneke F. M Rumengan Janny F. Polii Johnny Budiman Johny Budiman Juliaan Ch. Watung Kaparang, Frangky E Kurniati Kemer Kusumawardani, Niken Larengka, Falenscya Lefrand Manoppo Lumuindong, Frans Manahonas, Febrik Stopers Manoppo, Lefrrand Mariana E. Kayadoe Masengi, Kawilarag W. A Masengi, Kawilarang W. A. Modaso, Vivanda O. J. Mokolensang, Jeffrie F. Mokolensang, Jeffrie Fredrik Pamikiran, Revols D. Ch. Pangalila, Fransisco Philep Theodorus Pangauan, Ditsen Pelle, Wilmy Etwil Prasetyo, Fransisco W. Putra Antou, Kevin Rignolda Djamaluddin Robert A. Bara Sitorus, Hotma Stefany Taib, Ismanto A.R. Talakana, Sugianto Thamin, Arman Undap, Nani Ingrid Jacquline Unstain N. W. J. Rembet, Unstain N. W. J. Wilhelmina Patty Wungkana, Vike V. Yusuf, Yustin