Article Per Year (5 Year)
p-Index From 2021 - 2026
2.125
P-Index
This Author published in this journals
All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX Jurnal Ilmiah Sains Journal of Fisheries & Marine
Paulus, James
Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Environmental Science Mathematics Physics

Published : 15 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 15 Documents
Search

 1   2 
Effect Of Lead Acetate (Pb(Ch3coo)2 On The Growth Of Marine Microalgaes Chlorella vulgaris (Beijerink, 1890) Jeheskiel, Aprilisa Viony; Kemer, Kurniati; Mantiri, Desy Maria Helena; Paulus, James; Rompas, Rizald M.; Khreekhoff, Renny
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.42458

Abstract

Microalgae are single-celled microorganisms, forming colonies and are very commonly found in large waters such as seas, lakes, rivers, and swamps. The purpose of this study was to determine the growth and density of microalgae Chlorella vulgaris in a controlled container with the administration of lead acetate at different concentrations. Cell growth of Chlorella vulgaris with samples of marine microalgae Chlorella vulgaris from culture containers. At the beginning of the exponential phase, the microalgae were given lead acetate in 3 containers with concentrations of 30 ppm, 50 ppm, 80 ppm, and control/without treatment. The results showed that the growth of Chlorella vulgaris cells with lead acetate administration experienced unstable growth compared to those without lead acetate administration (control).Keywords: Microalgae; Chlorella vulgaris; Culture; Lead AcetateAbstrakMikroalga merupakan mikroorganisme bersel satu, membentuk koloni dan sangat banyak dijumpai di perairan besar seperti pada laut, danau, sungai serta perairan payau. Tujuan dari penelitian ini adalah untuk mengetahui pertumbuhan dan kepadatan mikroalga  Chlorella vulgaris dalam wadah terkontrol dengan pemberian timbal asetat pada konsentrasi yang berbeda. Pertumbuhan sel Chlorella vulgaris denga Sampel mikroalga laut Chlorella vulgaris berasal dari wadah kultur. Pada awal fase eksponensial, mikroalga diberikan timbal asetat ke dalam 3 wadah dengan konsentrasi 30 ppm, 50 ppm, 80 ppm serta kontrol/tanpa perlakuan. Hasil penelitian menunjukkan bahwa pertumbuhan sel Chlorella vulgaris dengan pemberian timbal asetat mengalami pertumbuhan yang tidak stabil dibandingkan tanpa pemberian timbal asetat (kontrol).Kata kunci: Mikroalga;  Chlorella vulgaris;  Kultur; Timbal Asetat
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.
Organochlorine Exposure Influences the Cellular Morphology of Red Algae Eucheuma denticulatum (N.L. Burman) Collins & Hervey, 1917 Tumembouw, Sipriana S; Rompas, Rizald M; Lumenta, Cyska; Paulus, James J H; Lasut, Markus T; Mantiri, Desy M H
Jurnal Ilmiah Perikanan dan Kelautan Vol. 17 No. 2 (2025): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v17i2.57121

Abstract

Graphical Abstract   Highlight Research 1. The research demonstrates organochlorine influences the nanoparticle and the thickness of red algae cellulose. 2. SEM analysis with EDS visualization showed an accumulation of Chlorine (Cl) in the thallus of red alga. 3. This research is essential to prevent and reduce the disposal of organochlorines into the environment because they can accumulate in soil, water, and air. 4. The disposal of organochlorines can also remain for years in the environment, which in turn will accumulate in food chains and negatively affect ecosystems and marine animals.     Abstract Organochlorine compounds not only pollute marine waters but also interfere with the survival of marine biota. Organochlorine compounds absorbed by organisms disrupt metabolism and inhibit cellular functions. The implication of this research is to prevent and reduce the disposal of organochlorines into the environment because they can accumulate in soil, water, and air, remaining for years in the environment. This accumulation can affect food chains and negatively affect ecosystems and marine animals.This research aimed to investigate the impact of organochlorine content on the surface morphology and biomineral characteristics of the red alga E. denticulatum cells. Electron Microscope (SEM) analysis was used to observe particle morphology surfaces down to 1 nm, while Energy Dispersive Spectroscopy (EDS) was used to analyze the specimens' element composition and chemical characteristics. Energy Dispersive Spectroscopy (EDS) analysis revealed that red algae had the highest content of Chlorine (Cl) at 57.20%, followed by Sodium (Na) at 34.84%, Oxygen (O) at 5.21%, Calcium (Ca) at 1.64%, and the lowest element being Sulfur (S) at 1.11%. Overall, this research demonstrates the negative impact of organochlorine content on the morphological structure and biomineral composition of E. denticulatum, highlighting the need for effective measures to prevent and reduce organochlorine pollution in marine environments. Further research could focus on specific mechanisms of organochlorine toxicity and potential remediation strategies.  
Variability of Oceanographic Parameters During and After Tropical Cyclone Kammuri in Talaud Islands Waters Khoirul Insan; Wilhelmina Patty; Indri S. Manembu; Rignolda Djamaluddin; Diane J. Kusen; James J. H. Paulus; Deiske A. Sumilat; Johannes E. X. Rogi
JURNAL PESISIR DAN LAUT TROPIS Vol. 13 No. 2 (2025): JURNAL PESISIR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.13.2.2025.62642

Abstract

Tropical cyclones are meteorological phenomena in tropical regions that can bring extreme weather, including heavy rain, thunderstorms, and strong winds along their path. These conditions can pose a threat to human safety, particularly fishermen and other maritime activities. The waters of the Talaud Islands, located near the western Pacific Ocean, are frequently traversed by tropical cyclones. This study aims to analyze the variability of oceanographic parameters spatially dan temporally during and after Tropical Cyclone Kammuri in the Talaud Islands waters. The oceanographic parameter data, including wind direction and speed, current direction and speed, sea surface temperature, and chlorophyll-a, are obtained from remote sensing data and numerical modeling, which can be accessed through the CMEMS website. Result of this study shows that During the cyclone, maximum wind speed reached 9.1 m/s, triggering an increase in surface currents up to 0.55 m/s. Sea surface temperature decreased by 0.6 °C due to vertical mixing, while chlorophyll-a concentrations dropped to 0.06 mg/m³ before rising again to 0.11 mg/m³. After the cyclone passed, wind and current speeds declined, while sea surface temperature and chlorophyll-a concentrations increased over the following three weeks. Keywords: Cyclone; Wind; SST; Chlorophyll-a; Talaud Abstrak Siklon tropis merupakan fenomena meteorologi di kawasan tropis yang dapat membawa cuaca ekstrem, termasuk hujan deras, badai petir, dan angin kencang di sepanjang jalurnya. Kondisi ini berpotensi membahayakan keselamatan manusia, terutama nelayan dan aktivitas pelayaran lainnya. Perairan Kepulauan Talaud terletak di dekat Samudera Pasifik Bagian Barat dimana pada wilayah tersebut sering menjadi jalur lintasan siklon tropis. Walaupun tidak termasuk lintasan siklon tropis, kondisi oseanografi di Perairan Kepulauan Talaud dapat menerima dampak tidak langsung dari fenomena tersebut. Penelitian ini bertujuan untuk menganalisis variabilitas parameter oseanografi secara spasial dan temporal pada saat dan setelah terjadinya Siklon Tropis Kammuri di perairan Kepulauan Talaud. Data parameter oseanografi berupa arah dan kecepatan angin, arah dan kecepatan arus, suhu permukaan laut, serta klorofil-a diambil dari data penginderaan jarak jauh dan pemodelan numerik yang dapat diakses melalui website CMEMS. Hasil penelitian menunjukaan bahwa pada saat siklon tropis kecepatan angin meningkat yaitu mencapai 9,1 m/s, memicu peningkatan kecepatan arus permukaan hingga 0,55 m/s. Suhu permukaan laut menurun 0,6 °C akibat pencampuran vertikal, sedangkan klorofil-a sempat turun menjadi 0,06 mg/m³ sebelum kembali naik ke 0,11 mg/m³. Setelah siklon berlalu, kecepatan angin dan arus menurun, sementara suhu laut dan klorofil-a meningkat dalam tiga minggu berikutnya. Kata kunci: Siklon; Angin; SPL; Klorofil-a; Talaud
Microplastic Identification and Density In Coastal Sediments of Manado Bay Angelyca P. Novadah Novadah; , Natalie D.C. Rumampuk; Nickson J. Kawung; Royke M. Rampengan; James J. H. Paulus; Darus S. J. Paransa
JURNAL PESISIR DAN LAUT TROPIS Vol. 13 No. 3 (2025): JURNAL PESISIR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.13.3.2025.64777

Abstract

  Most plastics originating from anthropogenic activities generate plastic waste in aquatic environments, which is difficult to degrade even when floating on the surface, suspended in the water column, or deposited in sediment. The increasing volume of plastic waste in marine waters requires global attention to develop rapid and effective solutions for managing plastic pollution. Microplastics are small plastic particles measuring less than 5 mm, and due to their small size, they are difficult to detect. Microplastics are categorized into two types: secondary microplastics and primary microplastics. This study aims to identify the types and quantify the density of microplastics based on their types and colors. Sediment samples were collected at two stations: station 1, located at the Tondano River estuary, and station 2, located on the coast of Mandolang Beach. The characteristics and density of microplastics were determined through sampling using a 50 meter transect line. The identification of shapes and colors and the counting of microplastics were conducted using a microscope. The results of this study show that Manado Bay is accumulated with microplastics characterized by three types fragments, fibers, and films and exhibiting colors such as black, blue, red, green, and white. The average microplastic density at station 1 was 73.33 particles/kg, and at station 2 was 44.67 particles/kg, indicating the average number of microplastics found in each kilogram of sediment sample from both stations. This finding indicates that the coastal area of Manado Bay has a considerable accumulation of microplastics. Keywords: microplastic, sediment, density, coast of Manado Bay, types of microplastic   Abstrak Sebagian besar plastik dari aktivitas antropogenik menghasilkan sampah plastik di lingkungan perairan, yang sulit terurai meskipun berada di permukaan, tersuspensi di kolom air, maupun mengendap di sedimen. Bertambahnya volume sampah plastik di perairan laut memerlukan perhatian global untuk mendapatkan solusi cepat dan efektif untuk penanganan pencemaran sampah plastik. Mikroplastik merupakan partikel plastik kecil yang berukuran <5 mm, dengan ukuran yang kecil mikroplastik sulit dideteksi. Mikroplastik terbagi menjadi dua yaitu mikroplastik sekunder dan mikroplastik primer. Penelitian ini bertujuan untuk mengidentifikasi jenis dan menghitung kepadatan mikroplastik, dengan mengidentifikasi berdasarkan jenis dan warna. Sampel sedimen diambil di 2 stasiun, stasiun 1 terletak di muara Sungai Tondano, stasiun 2 terletak di pesisir Pantai Mandolang. Karakteristik dan kepadatan mikroplastik ditentukan melalui pengambilan sampel yang dilakukan dengan metode garis transek sepanjang 50 meter. Identifikasi bentuk dan warna serta perhitungan jumlah mikroplastik dilakukan menggunakan mikroskop. Berdasarkan hasil dari penelitian ini diketahui Teluk Manado terakumulasi mikroplastik dengan karakteristik berdasarkan jenis berupa fragmen, fiber, dan film serta mikroplastik yang ditemukan memiliki warna hitam, biru, merah, hijau, dan putih. Kepadatan mikroplastik rata-rata pada Stasiun 1 sebesar 73,33 partikel/kg dan pada Stasiun 2 sebesar 44,67 partikel/kg, yang menunjukkan jumlah rata-rata mikroplastik dalam setiap 1 kilogram sampel sedimen di masing-masing stasiun. Temuan ini menunjukkan bahwa kawasan pesisir Teluk Manado terdapat akumulasi mikroplastik yang cukup signifikan. Kata kunci: mikroplastik, sedimen, kepadatan, pesisir Teluk Manado, jenis mikroplastik
Co-Authors , Natalie D.C. Rumampuk Abd Razak Adnan S. Wantasen Angelyca P. Novadah Novadah Antonius P. Rumengan Bella R. Lelewa Calvyn F. A. Sondak, Calvyn F. A. Carolus P. Paruntu Chatrien A. L. Sinjal Cyska Lumenta Dairivaldo, Kettang Legrant Darus S. J. Paransa Darus S. Paransa Darus Saadah J. Paransa Deiske A. Sumilat Deiske Adeliene Sumilat, Deiske Adeliene Deiske. A. Sumilat Diane J. Kusen Elvy L. Ginting Engel V. Pandey Farnis B. Boneka Fransiscus Rori Henneke Pangkey Immanuel S. T. Septian Indri S. Manembu Jeheskiel, Aprilisa Viony Johannes E. X. Rogi Joice R. T. S. I. Rimper Joice R.T.S.L Rimper Joudy R. R. Sangari Joudy Sangari Kawung, Nikita Khoirul Insan Khreekhoff, Renny Kurniati Kemer Lumuindong, Frans Mamangkey, Noldy G.F Mantiri, Desy M. H Markus T. Lasut Medy Ompi Natalie D Rumampuk Natalie D. C. Rumampuk Natalie Rumampuk, Natalie Nickson J. Kawung Noldy G. F. Mamangkey Nowin, Edgar Pankie Pangemanan Pankie Pangemanan Pelle, Wilmy E. Razak, Abd Remy E.P. Mangindaan Rene Ch. Kepel Reny L. Kreckhoff Rignolda Djamaluddin Rimper, Joice RTSL Rompas, Rizald Rompas, Rizald M Rompas, Rizald M. Rosita A. J. Lintang Royke M. Rampengan Sangari, Joudi RR Sarif Hidayat, Sarif Septian Z. Supit Sipriana S Tumembouw Sondak, Calvyn FA Stenly Wullur Susan M. Sumampouw Suzanne L Undap Tamara Angela Gabriela Siahaan Veibe Warouw Veibe Warouw Wilhelmina Patty Wilmy E. Pelle