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Markus T. Lasut
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Jurnal Aquatic Science & Management, Gedung A Lantai 1, Pascasarjana, Universitas Sam Ratulangi, Jln. Kampus UNSRAT Bahu, Manado 95115, INDONESIA
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Sulawesi utara
INDONESIA
AQUATIC SCIENCE & MANAGEMENT
Published by Universitas Sam Ratulangi
ISSN : 23374403     EISSN : 23375000     DOI : https://doi.org/10.35800/jasm.v10i1.37485
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Journal of AQUATIC SCIENCE & MANAGEMENT publishes scientific articles of original research based on in-depth scientific study in the field of aquatic science and management, covering aspects of limnology, oceanography, aquatic ecotoxicology, geomorphology, fisheries, and coastal management, as well as interactions among them.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 5 Documents
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Search results for , issue "Vol 9, No 1 (2021): APRIL" : 5 Documents clear
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
Screening antibacterial activity ODS fractions of marine sponges against non-pathogenic bacteria tuberculosis Mycobacterium smegmatis 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.9.1.2021.32692

Abstract

Nine unidentified marine sponges from Bunaken Island waters in Manado Indonesia were observed on anti-tuberculosis (TB) against non-pathogenic Mycobacterium smegmatis NBRC 3207 and it was found that the ethanol crude extracts and ODS fractions of these sponges inhibited the growth of bacteria M. smegmatis. Sponge SP.323 is the most inhibiting and showed Intermediate (I) activity with inhibition zones of 9, 11, 11, 8 mm/disk at 10µg/disk., for fraction 3,4,5,6 respectively, and need further experimental analysis to justify the antimicrobial activity, NMR analysis and structure elucidation.
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
Comparison of operational costs and production of fresh tuna products; before and during the Covid-19 pandemic in Talaud Islands Regency, North Sulawesi Province Naung, Pelia; Luasunaung, Alfret; Andaki, Jardie A.; Suhaeni, Siti; Kaligis, Erly Y.; Manembu, Indri S.
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.9.1.2021.33855

Abstract

Covid-19 pandemic has implications for all aspects of fishery activities in Indonesia, one of them is negative impact on the supply chain of the fishery business. To find out more about this impact, the study was aimed to determine the condition, in general, of tuna capture fisheries in the Talaud Islands Regency before and during the Covid-19 Pandemic, and to find out the comparison of operational costs and production of fresh tuna at the level of fishermen and intermediary traders in the area in both periods. Data collection was carried out in April 2020 to March 2021. Three districts in the area were selected as research locations, namely Salibabu, Gemeh, and South Essang. Surveys using questionnaires were conducted on respondents at predetermined locations. Comparative analysis using t-test was applied in this study. The results showed that the pandemic has caused, among other things, a decline in fish prices, effect in community's economy, and a decrease of tuna production. Tuna production is particularly important because while it affected the production, the operational costs remained constant. This occurs at all levels, both at the level of fishermen and at the level of intermediary traders. It can be concluded that the Covid-19 pandemic has had an impact on fresh tuna fishing activities in the area where fresh tuna production has decreased and tuna buying traders are not operating. In particular, the operational costs of catching tuna at the fisherman's level are the same, both before and during the pandemic. Meanwhile, tuna production has decreased dramatically during the pandemic. This also happens at the level of intermediary traders.Indonesian title: Komparasi biaya operasional dan produksi produk tuna segar pada masa sebelum dan selama Pandemi Covid-19 di Kabupaten Kepulauan Talaud, Provinsi Sulawesi Utara

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