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All Journal AQUATIC SCIENCE & MANAGEMENT e-Journal BUDIDAYA PERAIRAN JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX JURNAL PERIKANAN DAN KELAUTAN TROPIS JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Briliant: Jurnal Riset dan Konseptual
Veibe Warouw
Fakultas Perikanan dan Ilmu Kelautan, Universitas Sam Ratulangi, Manado, Sulawesi Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science

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Journal : AQUATIC SCIENCE

 1 
The size variation of rotifer Brachionus rotundiformis cultivated with different feed at 40 ppt salinity Rimper, Joice R.T.S.L; Harikedua, Silvana D; Warouw, Veibe
AQUATIC SCIENCE & MANAGEMENT Vol 7, No 1 (2019): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.7.1.2019.25043

Abstract

Title (Bahasa Indonesia): Variasi ukuran rotifer Brachionus rotundiformisyang diberi pakan berbeda pada salinitas 40 ppt RotiferBrachionus rotundiformisis a group of zooplankton which is used by fish larvae for feeding to initiate their growth. This zooplankton is widely favored by marine fauna larvae because of its small size can fits well with various larval mouth; thus, it is easily preyed by larvae. This study aimed to determine the variation of rotifer B. rotundiformismorphometry if cultured with different feed at 40 ppt. The use of 40 ppt salinity is expected to provide a variable morphometric size because B. rotundiformishas a polymorphism property. Microalgae used as feed for rotifer B. rotundiformiswere Prochloronsp. and Nanochloropsis oculata. Microalgae were cultured with Hirata medium. In the early stages, B. rotundiformiswas cultured at optimum temperature (28 ºC) and salinity 20 ppt, then it was cultured at salinity 40 ppt. Salinity adaptation was done by raising the salinity of the medium by 2 ppt every two days in a 10 ml reaction tube containing 10 individuals. After adaptation, B. rotundiformiswas transferred in a 1000 ml container with a density of 50 individuals. For the morphometric aspect, the total length, the length of the lorica, the width of the lorica and the anterior width were measured. The result showed the morphometric of rotiferB. rotundiformisfed with microalgae Prochloronsp. at 40 ppt salinity was smaller than that of the rotifer fed with N. oculata. Based on that finding it can be concluded that B. rotundiformis fed with Prochloronsp. at a salinity of 40 ppt has the potential to be developed as feed for fish larvae. Further investigations on how to accelerate the cultivation of microalgae Prochloronsp. as feeding for B. rotundiformisare needed.RotiferBrachionus rotundiformismerupakan golongan zooplankton yang digunakan sebagai makanan bagi larva ikan. Zooplankton ini banyak disukai oleh larva fauna laut, karena ukurannya kecil yang cocok dengan berbagai bukaan mulut larva. Penelitian ini bertujuan untuk mengetahui variasi morfometri rotifer B. rotundiformis, jika dikultur pada salinitas yang tinggi (40 ppt) dengan pemberian pakan berbeda. Penggunaan salinitas 40 ppt diharapkan bisa memberikan ukuran morfometrik yang bervariasi, karena rotifer jenis ini memiliki sifat polimorfisme. Alga mikro yang digunakan sebagai pakan adalah Prochloronsp. Dan Nanochloropsis oculata.Alga mikro tersebut dikultur dalam media Hirata. Pada tahap awal, B. rotundiformisdikultur pada suhu optimum (28 ºC) dengan salinitas 20 ppt; kemudian, dikultur pada salinitas 40 ppt. Adaptasi salinitas dilakukan dengan menaikkan salinitas medium sebanyak 2 ppt setiap dua hari dalam tabung reaksi berukuran 10 ml, yang berisi 10 individu. Setelah diadaptasikan, rotifer dipindahkan ke wadah berukuran 1000 ml dengan kepadatan sebanyak 50 individu dan dikultur pada salinitas 40 ppt. Aspek morfometri berupa panjang total, panjang lorica, lebar lorica, dan lebar anterior diukur. Hasil penelitian menunjukkan, bahwa panjang total rotifer B. rotundiformis, yang diberi pakan Prochloronsp. berukuran lebih kecil dibandingkan dengan rotifer yang diberi pakan N. oculata. Berdasarkan hasil penelitian dapat disimpulkan, bahwa B. rotundiformisyang diberi pakan Prochloronsp. pada salinitas 40 ppt memiliki potensi untuk dikembangkan sebagai bahan pakan bagi larva ikan. Penelitian lebih lanjut tentang cara mempercepat budidaya microalgae Prochloronsp. sebagai makan untuk B. rotundiformis diperlukan.
Jenis, komposisi, dan kepadatan sampah laut di Teluk Manado, Sulawesi Utara, pada musim hujan (Type, composition, and density of marine litter in Manado Bay during rainy season) Pane, Lindon R; Pelle, Wilmy E; Undap, Suzanne J; Rumampuk, Natalie D.C; Warouw, Veibe; Mamuaja, Jane M; Lasut, Markus T
AQUATIC SCIENCE & MANAGEMENT Vol 8, No 1 (2020): APRIL
Publisher : AQUATIC SCIENCE & MANAGEMENT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.8.1.2020.29570

Abstract

During rainy season, a various type of litter can enter the ocean through rivers. This is a significant contributor to the amount of marine litter in the waters. In order to access the type, composition, and density of the litter during rainy season, this study was conducted in Manado Bay, North Sulawesi. The observation was done on the litter stranded on the beach, and they were classified into two different size groups, macro (>2,5 cm)- and meso (0,5-2,5 cm)-sizes. Malalayang Beach and Bailang Beach were chosen for the location of the study. Litter type, composition, and density was evaluated according to National Marine Litter Monitoring Guide. The result showed that there were 7 types of macro-size and 6 types of meso-size marine litter in Malalayang Beach and it was dominated by glass and ceramic for both sizes. In Bailang Beach, 9 types of macro-size and 7 of meso-size were found, and it was dominated by plastics. It can be concluded that various type of marine litter present in Manado Bay, both macro- and meso- sizes, during the rainy season. The highest composition was the glass and ceramics type. However, the highest density was the plastic type.---Pada musim hujan, berbagai jenis sampah dari daratan masuk ke perairan pantai melalui sungai. Hal ini merupakan penyumbang signifikan bagi jumlah sampah laut di perairan. Untuk menilai jenis bahan, komposisi, dan kepadatan sampah laut pada musim hujan, penelitian ini dilakukan di Teluk Manado, Sulawesi Bagian Utara. Pengamatan dilakukan terhadap sampah laut yang terdampar di pantai (beach litter), berukuran makro (> 2,5 cm) dan meso (0,5-2,5 cm), di dua lokasi, yaitu Pantai Malalayang dan Pantai Bailang. Sampah laut dievaluasi menggunakan Pedoman Nasional tentang Pemantauan Sampah Pantai. Hasil penelitian menunjukkan, sampah laut jenis plastik, kaca & keramik, busa plastik, kertas & kardus, logam, karet, kayu, kain, dan bahan lainnya, baik berukuran makro maupun meso ditemukan di perairan. Di Pantai Bailang, komposisi sampah laut berukuran makro dan meso didominasi oleh jenis bahan plastik; tetapi, di Pantai Malalayang didominasi oleh jenis kaca & keramik. Demikian juga untuk kepadatan sampah laut di Pantai Bailang, jenis bahan plastik mendominasi, baik sampah berukuran makro maupun meso. Sedangkan di Pantai Malalayang, jenis kaca & keramik mendominasi kepadatan sampah laut pada semua ukuran. Selanjutnya, dapat disimpulkan, pada musim hujan, berbagai jenis bahan sampah laut berada di Teluk Manado, baik berukuran makro maupun meso. Komposisi terbesar untuk ukuran makro dan meso ialah jenis bahan kaca & keramik. Namun, kepadatan tertinggi untuk ukuran makro dan meso ialah sampah jenis bahan plastik.
The relationship between El Niño Southern Oscillation (ENSO) and oceanographic parameters in North Sulawesi waters Lasut, Astrid Y.; Patty, Wilhelmina; Warouw, Veibe; Sondakh, Calvyn A.; Bara, Robert A.; Luasunaung, Alfret; Sumilat, Deiske A.
AQUATIC SCIENCE & MANAGEMENT Vol 9, No 1 (2021): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.9.1.2021.32494

Abstract

Information about oceanographic conditions is important to determine the fertility level of waters. Oceanographic parameters in water can be influenced by global climate factors, one of them is the ENSO (El Niño Southern Oscillation) phenomenon. There have been many studies on the effect of ENSO phenomenon on oceanographic variability, but no studies have been carried out in the waters of North Sulawesi. This study aims to determine the effect of the ENSO phenomenon on the variability distribution of oceanographic parameters in North Sulawesi waters. The data used for this study were Sea Surface Temperature (SST) and chlorophyll-a from the AQUA-MODIS imaging results, wind reanalysis results from ECMWF, and Nino 3.4 index as an indicator of ENSO from NOAA. The data were processed and analyzed using quantitative analysis methods in the form of graphics. The results showed an indirect effect of the ENSO phenomenon on SST parameters and chlorophyll-a. This is because the effect of the ENSO phenomenon occurred in a certain period:  when strong El Niño triggered low temperatures of sea surface and high chlorophyll-a, and when La Niña was strong it triggered high temperatures of sea surface and low chlorophyll-a. Meanwhile, the wind speed pattern showed an insignificant effect because the wind speed was still dominated by the influence of the monsoon pattern.Indonesian title: Hubungan antara El Niño Southern Oscillation (ENSO) dan parameter oseanografi di perairan Sulawesi Utara
Analysis of leading commodities from capture fisheries resources at Bitung Oceanic Fishing Port, North Sulawesi Kusumaningrum, Arianda; Lumingas, Lawrence L.J.; Sumilat, Deiske A.; Budiman, Johnny; Luasunaung, Alfret; Warouw, Veibe
AQUATIC SCIENCE & MANAGEMENT Vol 9, No 2 (2021): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v9i2.35130

Abstract

Bitung City is one of the centers of fishery production in Indonesia. Analysis of capture fisheries resources, especially at the Bitung Oceanic Fishing Port (BOFP) as a fish landing center in Bitung city, needs to be done scientifically in order to find out the need for sustainable capture fisheries. The purpose of this research is to analyze the potential of the types of superior commodities that have the opportunity to be developed. Data was collected using survey methods and in-depth interviews with fishermen and local stakeholders. Analysis of the potential of fish resources was carried out using the surplus production method. From the results of the study, it is found that there are 8 (eight) types of leading commodities in BOFP which can be developed with different potentials. They are: 1) Marlin with a sustainable potential of 159 tons, utilization rate of 44%; 2) Tongkol with sustainable potential of 10.485 tons, utilization rate is 58%; 3) Kembung with a sustainable potential of 183 tons utilization rate of 61%; 4) Big-eye tuna with sustainable potential of 111 tons utilization rate of 69%; 5) Selar with sustainable potential of 450 tons utilization rate of 85%; 6) Yellow Fin Tuna with a sustainable potential of 15.251 tons utilization rate of 86%; 7) Layang with sustainable potential of 7.152 tons utilization rate of 95%, and 8) Cakalang.Indonesian title: Analisis komoditas unggulan dari sumber daya perikanan tangkap di Pelabuhan Perikanan Samudera Bitung, Sulawesi Utara
Mitigation of marine debris from land: Formulation of the best options for managing marine debris in the coastal city of Manado, Indonesia Warouw, Veibe; Mamuaja, Jane M.; Pane, Lindon R.; Maramis, Regina U.; Lasut, Markus T.
AQUATIC SCIENCE & MANAGEMENT Vol. 11 No. 2 (2023): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v11i2.54382

Abstract

Mitigation of marine debris in Manado City, the city which is situation in front of the Manado bay, is very important in order to prevent its effect on the coastal communities and as well as for the aesthetics point of view. That activities can directly protect the ecosystem of Bunaken Marine Park (BMP), and can become an important part of the marine waste management activities especially in supporting the commitment of Indonesian government to reducing plastic waste in the sea by 70% by 2025. For this reason, a marine waste management is needed and it should be prepared based on the academic study that are comprehensive and holistic as well as effective and efficient, and also suitable for environmental condition in Manado City. The study was aimed to formulate best options for the existing marine waste management in Manado City. By using qualitative-descriptive and content-analysis methods, four aspects of managemet were studied, and they are 1) public awareness, 2) institutional arrangements, 3) regulations, policies and management plans, and 4) waste management guidelines. The data obtained were quantitatively and qualitatively analyzed. The public awarenes was qualitatively analyzed by using two indicators, community concern and community preference. The existing marine waste management was presented based on studied aspects and the best option was proposed as recommendation for marine waste management in Manado City.
Effectiveness of coconut water (Cocos nucifera) in feed on masculinization and growth factors of nile tilapia (Oreochromis niloticus) Sukmawati; Kalesaran, Ockstan J.; Warouw, Veibe; Mokolensang, Jeffrie F.; Paransa, Darus Sa'adah Johanis; Salaki, Christina Leta
AQUATIC SCIENCE & MANAGEMENT Vol. 13 No. 2 (2025): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v13i2.64394

Abstract

This study evaluated the effectiveness of coconut water (Cocos nucifera) applied as a spray onto feed for the masculinization and growth performance of Nile tilapia (Oreochromis niloticus). The 63-day experiment employed a completely randomized design (CRD) with five treatments of coconut water doses (0, 0.10, 0.15, 0.20, and 0.25 mL/g feed) and three replications. Measured parameters included male proportion, growth performance (absolute length and weight, specific growth rate), survival rate, and water quality. Results indicated that coconut water supplementation significantly influenced masculinization and growth. The optimal dose was 0.15 mL/g feed, which yielded the highest male proportion (63.65%)—a 13.65% increase over the control. At this dose, absolute length and weight reached 7.15 cm and 5.34 g, respectively, with a specific growth rate of 8.62%. In contrast, higher doses (0.20-0.25 mL/g) reduced both masculinization and growth performance, despite high survival rates (90-95%). Water quality parameters remained within optimal ranges throughout the trial. These findings suggest that coconut water is a viable, eco-friendly alternative to synthetic hormones for tilapia masculinization and can enhance growth when applied at the recommended dosage.
First record of semi-aquatic bugs (Hemiptera: Veliidae) from Tasik Ria coastal waters, North Sulawesi, Indonesia Warouw, Veibe; Rimper, Joice R.T.S.L; Harikedua, Silvana Dinaintang; Manembu, Indri Shelovita; Rumampuk, Natalie Detty
AQUATIC SCIENCE & MANAGEMENT Vol. 13 No. 2 (2025): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v13i2.66637

Abstract

Semi-aquatic bugs of the family Veliidae (Hemiptera: Heteroptera: Gerromorpha) are primarily associated with freshwater habitats; their occurrence in coastal environments remains poorly documented, particularly in tropical regions. This study reports the first record of Veliidae from the coastal waters of Tasik Ria Beach, North Sulawesi, Indonesia, thereby expanding the known ecological distribution of this family. Specimens were collected from surface-water microhabitats using a sweep net, and key environmental parameters were measured in situ. Morphological identification was based on stereomicroscopic examination of diagnostic characters. Molecular confirmation was obtained through DNA barcoding of the mitochondrial cytochrome c oxidase subunit I (COI) gene, with sequences compared against the GenBank and BOLD databases. Both morphological and molecular analyses confirmed the specimens' taxonomic placement within Veliidae. Their presence in a coastal habitat indicates greater ecological plasticity and habitat tolerance than previously recognized. This finding establishes important baseline data for future research on the distribution, bioecology, and adaptive strategies of semi-aquatic insects in tropical coastal ecosystems.
Spatial variation of microplastic abundance and types in Bitung coastal waters, North Sulawesi: influence of fishing, residential, and port activities Rimper, Joice; Warouw, Veibe; Sangari, Joudy; Uniplaita, Dominique; Lasut , Markus
AQUATIC SCIENCE & MANAGEMENT Vol. 13 No. 2 (2025): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v13i2.66650

Abstract

Microplastic contamination in coastal waters is shaped by local human activities and hydrodynamic transport, yet spatially explicit evidence from many Indonesian coastal cities remains limited. This study assessed the spatial variation of microplastic abundance and morphological types in Bitung coastal waters, North Sulawesi, across three stations representing contrasting coastal activity zones: fishing area (Station 1), residential area (Station 2), and port area (Station 3). Surface-water samples were collected in July 2025 using horizontal plankton-net tows over a 10 m transect, with three replicates per station. Laboratory processing included sequential sieving (0.4 mm and 5 mm), oven drying (90°C, 24 h), wet peroxide oxidation (WPO) with fenton reagent, NaCl density separation, and filtration (Whatman 100–250 µm), followed by microscopic classification into fiber, fragment, pellet, film, and foam types. A total of 488 microplastic particles were recorded across all samples. The port station showed the highest abundance (320 particles, mean 106.7 ± 10.2 particles per tow), substantially exceeding fishing (92 particles, 30.7 ± 6.4) and residential (76 particles, 25.3 ± 9.5) stations. Overall composition was dominated by fragments (41.8%) and fibers (35.7%). Type composition differed significantly among stations, with fragments strongly dominating the port station, whereas fibers dominated the fishing and residential stations. These patterns indicate distinct local sources (e.g., shipping/port operations and packaging debris vs. textiles and fishing gear), highlighting the need for targeted waste control and monitoring in Bitung’s coastal zones.
Co-Authors Alfret Luasunaung Angkouw, Esther Dellayani Angmalisang, Ping Astony Antonius Rumengan Ari Berty Rondonuwu Boneka, Farnis B. Boneka Boneka, Farnis Bineada Calvyn F. A. Sondak, Calvyn F. A. Carolus Paulus Paruntu Cyska Lumenta Darus S. Paransa Deiske Adeliene Sumilat, Deiske Adeliene Elvy L Ginting Farnis B. Boneka Fitje F. Losung, Fitje F. Fitje Losung Frangky E. Kaparang Ginting, Elvy Like Henky Manoppo Henneke Pangkey Hidayat, Andre Alfian Indri Manembu Janny D. Kusen Johnny Budiman Joice R.T.S.L Rimper Joshian N.W. Schaduw Kalebos, Roosa C. Kaligis, Erly Yosef Kreckhoff, Reni L. Kumampung, Deislie R.H. Kusumaningrum, Arianda Lasut , Markus Lasut, Astrid Y. Lindon R Pane Lintang, Rosita A.J. Lumingas, Lawrence L.J. Mahmud, Maudy Rusmini Mamangkey, Noldy Gustaf Frans Mamuaja, Jane M. Mangangkung, Nazarrian Mangindaan, Remy Mangindaan, Remy Emile Petrus Manoppo, Lefran Mantiri, Desy M. H Maramis, Regina U. Markus T. Lasut Medy Ompi Mokolensang, Jeffrie Mokolensang, Jeffrie F. Mokosuli, Febrianty Dhea Molle, Ben Arther Monijung, Revol Dulles Natalie D Rumampuk Ngangi, Edwin Leonardo Apolonio Nowin, Edgar Ockstan J. Kalesaran Ockstan Kalesaran Pane, Lindon R. Pangalila, Novelia M.A. Pangkey, Henneke D. Paransa, Darus Sa'adah Paransa, Darus Sa'adah Johanis Paransa, Darus Sa’adah Johanis Paulus, James Pesoth, Christianto R. T. D. Maramis Ramadan, Febrian Reiny A. Tumbol Rimper, Abraham M. Rimper, Joice R. T. S. L . Rizal W Suleman Robert A. Bara Roeroe, Kakaskasen Andreas Rose O. S. E. Mantiri, Rose O. S. E. Rumampuk, Natalie D.C Rumampuk, Natalie Detty Rumampuk, Natalie Detty C Rumampuk, Natalie Detty C. Rumengan, Inneke Fenny Salaki, Christina Leta Salaki, Meiske S. Salawati, Vellysa Friendly Sangari, Joudy Saragih, Hans S. R. P. Sembiring, Sindiy Cloudya Silvana Dinaintang Harikedua Silvester B Pratasik Sirri, Yolanda Stenly Wullur sukmawati Sumual, Sarah S. Sundah, Geraldo Thimoty Tuliabu, Nelda Tuyu, Adel M. Undap, Suzanne J Undap, Suzanne Lydia Uniplaita, Dominique Wilhelmina Patty Wilmy E Pelle