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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Jurnal Matematika & Sains AGRI-SOSIOEKONOMI EKOTON Journal of Fisheries & Marine
Markus T. Lasut
Fakultas Perikanan dan Ilmu Kelautan, Universitas Sam Ratulangi, Manado
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science Mathematics Social Sciences

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Journal : AQUATIC SCIENCE

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Accumulation of heavy metals (As, Cd, Pb, Hg) on brown algae, Padina australis, cultivated in Kima Bajo Waters, North Minahasa Regency Hidayat, Sarif; Mantiri, Desy M.H.; Paulus, James J.H.; Lasut, Markus T.; Rumampuk, Natalie D.C.; Undap, Suzanne; Sumilat, Deiske A.
AQUATIC SCIENCE & MANAGEMENT Vol 9, No 1 (2021): APRIL
Publisher : AQUATIC SCIENCE & MANAGEMENT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.9.1.2021.32470

Abstract

Although heavy metals have relatively low levels in water column and sediments, they will not be degraded and can even be absorbed and accumulated by marine algae. Research on accumulation of heavy metals on algae was done in Kima Bajo Waters, North Minahasa Regency. The research objective was to evaluate the accumulation of four heavy metals, i.e. arsenic (As), cadmium (Cd), plumbum (Pb), and mercury (Hg), on brown macroalgae Padina australis. The alga was introduced and cultivated in the research area using bottom method. The same method was also used in the experiment. One-week acclimatization process was done prior the experiment. Sampling of alga’s thallus was carried out every two weeks to measure the concentration of metals. The experiment was terminated after six weeks. Bottom sediment was also collected at the beginning of the experiment to measure the metal concentration. The results showed that the heavy metals (As, Cd, Pb, and Hg) were accumulated in the algae. The highest concentration of Cd, Pb, and Hg accumulated in the algae was 0.15 mg/kg wet weight, 3.5 mg/kg wet weight, and 0.009 mg/kg wet weight, respectively. All the concentrations were higher than the initial concentration of each metal. Accumulation of As was also occurred with the highest concentration (1,9 mg/kg wet weigh) occurred at fourth weeks; however, it was lower than the initial concentration. The accumulation varied according to type of metals and time; accumulation of Cd, Pb, and Hg were occurred on second weeks of cultivations and As on the fourth weeks. It can be concluded that cultivated alga can accumulate heavy metals.Indonesian title: Akumulasi logam berat (As, Cd, Pb, Hg) pada alga coklat, Padina australis, yang dibudidaya di Perairan Kima Bajo, Kabupaten Minahasa Utara
Management of scad fisheries (Decapterus spp.) in Sulawesi Sea Waters, North Sulawesi Province, using EAFM Puansalaing, Deysy M.; Budiman, Johnny; Boneka, Farnis B.; Makapedua, Daisy M.; Lasut, Markus T.; Ngangi, Edwin L.A.; Sumilat, Deiske A.; Darmono, Oktaviano P.
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.9.1.2021.32468

Abstract

There are a large variety and quite abundant types of small pelagic fish that have high economic value in the Sulawesi Sea. One of which is the blue scad fish or commonly known as malalugis (Decapterus macarellus). This study aims to analyze and determine the status of scad fisheries management and to develop recommendations in the management of scad fisheries in the waters of Sulawesi Sea, North Sulawesi Province. The evaluation of fishery management status is carried out using multi-criteria analysis (MCA) through the development of composite index of each indicator of Ecosystem Approach to Fisheries Management (EAFM). The results showed that, in general, the status of scad fisheries management in North Sulawesi Province, was in ‘good’ category, specifically reviewed from the domain of fish resources fall into the category of “medium”, habitat and ecosystem “good”, fishing techniques “good”, economy “not good”, social “medium” and institutional “good”. Management actions take precedence over domains that have “poor” indicator values. Priority management action is implemented in the economic domain, followed by the domain of fish resources, social, institutional and fishing techniques.Indonesian title: Pengelolaan perikanan ikan layang (Decapterus spp.) di perairan Laut Sulawesi, Provinsi Sulawesi Utara, menggunakan EAFM
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.
Current condition of shallow-water benthic foraminifera in Manado bay, Indonesia Mamuaja, Jane M.; Mandagi, Stephanus V.; Lasut, Markus T.
AQUATIC SCIENCE & MANAGEMENT Vol. 11 No. 1 (2023): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v11i1.56113

Abstract

Coral reef community in Manado Bay is under pressure due to human activities in areas in and around Manado. In order to be able to wisely manage the bay area and the coral reefs in it, information about present conditions is needed. The use of marine organisms as bioindicators is one way to find information about the condition, and organisms such as foraminifera have the potential to be used as some species share the same requirement for water quality as the corals. Sampling for the foraminifera was carried out at 10 locations, and the depth of water ranged from 2.5 m to 7.0 m. The samples obtained were washed through a 63 μm sieve and dried. The separation of foraminifera tests from other sediments was done under a stereomicroscope and they were then identified to genus level. A total of 40 genera was identified among 3194 specimens. To get the FoRAM Index value, the foraminifera was categorized into three functional groups. 8 genera were categorized as symbiont-bearing group, 8 as opportunistic group, and 29 as heterotrophic group. FoRAM Index was found to be varied from 2.06 to 9.19 which indicated that Manado Bay water condition is also varied among the sampling area. In general based on the data obtained, it is assumed that water in Manado Bay is conducive for coral reef growth.
Co-Authors Adianse Tarigan Adnan S. Wantasen Adnan Wantasen Alen N. Narasiang Alfret Luasunaung Angkouw, Esther D. Angkouw, Esther Dellayani Bara, Robert. A. Bessie, Donny Mercys Boneka, Farnis B. Boneka Cyska Lumenta Darmono, Oktaviano P. Deiske A. Sumila Deiske Adeliene Sumilat, Deiske Adeliene Deysi Tampongangoy Deysy M. Puansalaing Eddy Mantjoro Edwin D Ngangi Edwin L. A. Ngangi Edwin L.A. Ngangi Emil Reppie Farnis B. Boneka Feni S. Mnsen, Feni S. Fitje Losung Grevo S. Gerung Gustaf Mamangkey Henneke Pangkey Henneke Pangkey Henry E. Lasut, Henry E. Indri Manembu Inneke F. M Rumengan J. Ch. Kumaat Janny D. Kusen Johnny Budiman Joshian N.W. Schaduw Kalalembang, Delarosa Kalebos, Roosa C. Kamagi, Jongky W.A. Karwur, Denny B.A Kawung, Nikita Kumampung, Deislie R. H. Lano, Inayati H.G.M Lawrence J. L. Lumingas Lawrence J.L Lumingas Lawrence J.L. Lumingas Lindon R Pane Lintang, Rosita A.J Lintang, Rosita AJ Mahale, Moch Machtino A Maitindom, Frits A Makapedua, Daisy M. Malinggas, Christin R.M Mamonto, Rofenly Mamuaja, Jane M. Mandagi, Stephanus V. Mantiri, Desy M. H Manumpil, Abraham W Manumpil, Silvana Maramis, Regina U. Maramis, Regina Urai Mega D. Dalero Mengko, Christian Najib Hi Talib Natalie D Rumampuk Natalie Rumampuk, Natalie Nego E. Bataragoa Nickson J. Kawung, Nickson J. Nikson J. Kawung Pane, Lindon R. Paulus, James Rama Presley Kambey Ramli A. Ismail, Ramli A. Reiny A. Tumbol Roike Iwan Montolalu Rompas, Margresye D. Rompas, Rizald Rompas, Rizald M Rondonuwu, Synthia I Ronoko, Stephen R Rose O. S. E. Mantiri, Rose O. S. E. Rose O.S.E. Mantiri Rumampuk, Natalie D.C S. Berhimpon Sandra Tilaar Sarif Hidayat, Sarif Sebastian C. A. Ferse Siegfried Berhimpon Sipriana S Tumembouw Sri Yuningsih Noor Stephanus V Mandagi Stephanus V. Mandagi Suawa, Youdy R Sulthana Samad Suria Darwisito, Suria Suzanne L Undap Tabita S.H. Suyoto Trine Sumampouw Undap, Suzanne J Veibe Warouw Vonne Lumenta Wilmy E Pelle Yundari, Yundari Zebblon, Passion Ch.