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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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Estimation of effects of tributyltin (TBT) bioaccumulation using the imposex character in marine gastropods (Thais tuberosa and Monodonta labio) Noor, Sri Yuningsih; Rumengan, Inneke F. M; Lasut, Markus T
AQUATIC SCIENCE & MANAGEMENT Vol 1, No 1 (2013): April
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.1.1.2013.1970

Abstract

The effects of tributyltin (TBT) have been estimated using imposex characters in two species of marine gastropods, Thais tuberosa and Monodonta labio, at 3 different locations along the Minahasa Peninsula, northern part of Sulawesi Island: Manado Bay Waters, Bitung Coastal Waters, and Tateli Coastal Waters as a control area. The estimation was done by comparing the percentage of female imposex (I) at different body size (small: shell length ≤ 25 mm; large: shell length >25 mm), and measuring the concentration of TBT in sediments and soft part of the gastropod samples. The highest I value was found in small sized T. tuberosa from Manado Bay Waters (63%) and large sized T. tuberosa from Bitung Coastal Waters (60%). Small and large sized M. labio had their highest I value, 30% and 44% respectively, in the samples from Manado Bay Water and Bitung Coastal Waters. The occurence of imposex in both speciesis correlated with the high concentration of TBT in sediments and soft part of the marine gastropod samples© Kajian tentang pendugaan pengaruh bioakumulasi logam berat tributyltin (TBT) menggunakan karakter imposeks pada gastropoda laut (Thais tuberosa dan Monodonta labio) telah dilakukan. Sampel diambil dari 3 lokasi di perairan sepanjang Semenanjung Minahasa, Pulau Sulawesi bagian Utara, yaitu Perairan Teluk Manado (PTM), Perairan Bitung (PBT), dan Perairan Pantai Tateli (PPT) sebagai lokasi kontrol. Pendugaan dilakukan dengan cara membandingkan persentase individu imposeks (I) sampel ukuran kecil (K; panjang cangkang ≤ 25 mm) dan ukuran besar (B; panjang cangkang >25 mm), dan pengukuran konsentrasi TBT pada sedimen dan bagian lunak sampel gastropoda laut. Nilai I tertinggi adalah pada T. tuberosa ukuran K asal PTM, sebesar 63%, dan ukuran B asal PBT, sebesar 60%.Untuk M. labio baik ukuran K maupun B, nilai I tertinggi adalah pada sampel asal PTM dan PBT, masing-masing sebesar 30% dan 44%. Kejadian imposeks pada kedua jenis sampel ini didukung dengan konsentrasi TBT pada sedimen dan jaringan gastropoda laut yang tinggi©
Environmental condition to fish culture using floating cage in Manalu Cluster, Sangihe Islands Regency Lano, Inayati H.G.M; Ngangi, Edwin L.A; Lasut, Markus T
AQUATIC SCIENCE & MANAGEMENT Vol 6, No 2 (2018): October
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.6.2.2018.24839

Abstract

Title (Bahasa Indonesia): Kondisi lingkungan perairan untuk budi daya ikan dengan sistem karamba jaring apung di Perairan Klaster Manalu, Kabupaten Kepulauan Sangihe Manalu and it surroundings cluster is a zone which is designatedas a development center for agropolitan and minapolitan region and as a marine and coastal aquaculture center which include Manalu Bay, South Tabukan sub-district, South East Tabukan sub-district, and Center Tabukan sub-district. Hangke,Sensahang/Ensahange, Talawe, Kalagheng, Mutung and Bembiha areasareincluded inthis cluster, although noresearch has been conducted to studythis area. Datacollected includewater quality parameters, data about convenience and risk factor. Data about convenience and risk factorwas collected by interview with persons who consider as those who know best about the site and do marine culture for living. Water quality parameters was collected by doing measurementonsalinity, temperature, disolved oxygen, visibility, pH, water depth and current velocity  in 4 representative areas.The collected data showthat convenience factor was high and risk factor waslow. Due to lowwater depth and lowvisibility, area 1and 2 was not recomended for futher development for marine culture with floating cage construction. Area 3 and 4 can be recomended for futher development because data result show good value.Klaster Manalu dan sekitarnya merupakan zona yang diperuntukkan untuk pusat pengembangan kawasan agropolitan dan minapolitan, dan pusat budi daya pantai dan laut di mana meliputi Teluk Manalu, Kecamatan Tabukan Selatan, Kecamatan Tabukan Timur, dan Kecamatan Tabukan Tengah. Perairan Hangke, Sensahang/Ensahange, Talawe, Kalagheng, Mutung, dan Bembiha masuk dalam klaster ini, meskipun belum ada penelitian dilakukan untuk mengkaji hal tersebut. Data yang dikumpulkan meliputi parameter kualitas air, faktor kenyamanan, dan faktor risiko. Data faktor kenyamanan dan risiko dikumpulkan menggunakan teknik wawancara kepada masyarakat, yang mengetahui tentang keberadaan daerah tersebut. Parameter kualitas air dikumpulkan dengan cara melakukan pengukuran terhadap salinitas, suhu, oksigen terlarut, kecerahan, pH, kedalaman, dan kecepatan arus pada 4 lokasi yang dipilih. Hasil analisis menunjukkan, bahwa faktor kenyamanan berada pada tingkatan tinggi dan faktor risiko berapa pada tingkatan rendah. Dalam hal kondisi perairan, karena kedalaman dan kecerahan rendah pada Lokasi 1 dan 2, maka lokasi tersebut tidak dianjurkan untuk dilakukan pengembangan budi daya laut menggunakan kurungan jaring apung (KJA). Lokasi 3 dan 4 dapat dianjurkan untuk dilakukan pengembangan karena hasil pengamatan menunjukkan nilai yang “baik”.
Fish disease mapping in North Sulawesi Province Manumpil, Silvana; Tumbol, Reiny A.; Lasut, Markus T.
AQUATIC SCIENCE & MANAGEMENT Vol 3, No 2 (2015): Oktober
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.3.2.2015.14044

Abstract

Title (Bahasa Indonesia): Pemetaan penyakit ikan di Provinsi Sulawesi Utara This study aims to determine fish diseases and the causative pathogens, and to map the spread of the diseases in fish farms in North Sulawesi province. The organisms studied are freshwater and salt water fish. Fish samples were taken randomly both healthy fish and fish showing clinical signs of infections. Fish samples were randomly taken, 3 fishes from each sampling location, and only 1 fish farm was selected from each regency/city. Salt water fish were taken only from regency/city that has fish farm. To support the fish disease data, some water quality parameters were also measured in situ such as: temperature, pH, dissolved oxygen (DO), brightness and ammonia concentration. Results showed that the fish samples were infected with pathogenic parasites, bacteria and viruses. The bacteria were Vibrio carchariae, Vibrio mimicus, Vibrio damsel, Vibrio alginolyticus, Aeromonas hydrophilla, Pseudomonas sp, Vibrio sp, Aeromonas sp, Flexibacter sp, Pseudomonas flourescens. A. hydrophilla is the dominant species of bacteria in all freshwater fish samples from all sampling locations. The parasites were Dactylogirus sp, Trichodina sp, Ichthyopthirius multifiliis, Argulus sp, Lernea sp. Parasites Trichodina sp is the dominant parasite species found. The viruses were VNN virus (Viral Nervous Necrosis) KHV virus (Koi Herpes Virus). Virus NN virus was found only in grouper cultured in the floating net of Talengen village, district Sangihe Islands. Penelitian ini bertujuan untuk mengetahui jenis-jenis penyakit ikan dan patogen penyebabnya serta memetakan penyebaran penyakit ikan di lokasi budidaya yang ada di provinsi Sulawesi Utara. Sampel yang digunakan adalah ikan air tawar dan air laut. Sampel ikan diambil secara acak baik ikan yang sehat maupun ikan yang memperlihatkan gejalah terinfeksi penyakit. Tiga ekor ikan sampel diambil dari setiap lokasi, dimana dipilih 1 lokasi budidaya di tiap kabupaten/kota. Sampel ikan air laut hanya diambil pada kabupaten/kota yang memiliki lokasi budidaya air laut. pengukuran beberapa parameter kualitas air juga dilakukan secara in situ seperti: suhu, pH, oksigen terlarut (DO), kecerahan dan kandungan amoniak. Hasil penelitian memperlihatkan bahwa sampel ikan yang diperiksa terinfeksi pathogen parasit, bakteri dan virus. Jenis bakteri patogen yang ditemukan adalah: Vibrio carchariae, Vibrio mimicus, Vibrio damsel, Vibrio alginolyticus, Aeromonas hydrophilla, Pseudomonas sp, Vibrio sp, Aeromonas sp, Flexibacter sp, Pseudomonas flourescens. Bakteri Aeromonas hydrophilla merupakan jenis bakteri yang paling dominan yang ditemukan di semua sampel ikan air tawar di lokasi-lokasi budidaya tempat pengambilan sampel. Jenis-jenis parasit yang ditemukan adalah: Dactylogirus sp, Trichodina sp, Ichthyopthirius multifiliis, Argulus sp, Lernea sp. Jenis parasit yang dominan adalah Trichodina sp. Jenis virus yang ditemukan adalah: virus VNN (Viral Nervous Necrosis), virus KHV (Koi Herpes Virus). Virus VNN ditemukan hanya pada sampel ikan kerapu yang dibudidayakan di jaring apung Kampung Talengen, Kabupaten Kepulauan Sangihe.
Coastal resources management in South Minahasa Regency, North Sulawesi Province Malinggas, Christin R.M; Manembu, Indri S; Lasut, Markus T
AQUATIC SCIENCE & MANAGEMENT Vol 5, No 2 (2017): October
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.5.2.2017.24568

Abstract

Title (Bahasa Indonesia): Pengelolaan sumber daya pesisir di Kabupaten Minahasa Selatan, Provinsi Sulawesi UtaraSouth Minahasa regency has the potential of coastal resources and ecosystem services that can provide a positive impact on improving coastal community standards of living. Coastal resources in this area have been exploited through a variety of activities, and these activities often overlap one another. If this trend continues, it will cause a decrease in the quality of coastal resources. The decline in the quality of coastal resources, in turn, will negatively impact the livelihood of generations to come. For that reason, an integrated and sustainable management tool is urgently needed. This study aimed at designingdeveloping strategies for the management of coastal resources in the South Minahasa regency. Data for this study were obtained through field surveys using a questionnaire by interviewing stakeholders related to coastal resource use and management. The obtained data were analyzed using Multi-Criteria Decision Analysis (MCDA) known as the simple technique of multi attribute rating technique(SMART) with the Criterium Decision Plus (Criplus version 3.0.S) software. The results showed that the main priority of coastal resource management in South Minahasa regency is fishing, with the following management strategies applied, among other things: 1) establishment of a program or activity for fisheries, 2) providingsupporting infrastructure required by the public, 3) empowering the community in relation to functions and benefits of coastal resources, 4) informing the community on the use of environmentally friendly fishing gear, and 5) developing human resources through education and training activities related to the processing of fishery products.KabupatenMinahasa Selatanmemiliki potensi sumber dayadan jasa pesisir yang dapat memberikan dampak positif bagi peningkatan taraf hidup masyarakat. Sumber daya pesisir di daerah ini telah dieksploitasi melalui berbagai kegiatan, dan kegiatan-kegiatan tersebut seringkali tumpang tindih satu dengan lainnya. Jika hal ini terus berlangsung, maka akan menimbulkan penurunan kualitas sumber daya pesisir. Penurunan kualitas sumber daya pesisir memberikan dampak buruk bagi generasi yang akan datang. Untuk itu, diperlukan suatu pengelolaan secara terpadu dan berkelanjutan.Penelitian ini bertujuan untuk menyusun strategi pengelolaan sumber daya pesisir di Kab. Minahasa Selatan. Dalam penelitian ini data diperoleh melalui survey lapangan dengan menggunakan kuesioner pada stakeholderyang terkait dengan pengelolaan pesisir. Selanjutnya, data tersebut dianalisis menggunakan metode Multi Criteria Decision Analysis (MCDA) dengan teknik simple multi attribut rating technique (SMART) dan bantuan peragkat lunak Criterium Decision Plus (Criplus versi 3.0.S).Hasil penelitian menunjukan bahwa, prioritas utama pengelolaan sumber daya pesisir Kab. Minahasa Selatan adalah perikanan, dengan strategi pengelolaan,antara lain,yaitu:1) menetapkan program/kegiatan, 2) menyediakan infrastruktur penunjang yang dibutuhkan oleh masyarakat dan tepat sasaran, 3) melakukan pemberdayaan kepada masyarakat terkait fungsi dan manfaat sumber daya pesisir, 4) mensosialisasikan tentang penggunaan alat tangkap yang ramah lingkungan, 5) mengembangkan sumber daya manusia melalui kegiatan pendidikan dan pelatihan terkait pengolahan produk hasil perikanan.
Mercury (Hg) content in fish Meka (Xiphias sp.) in Fish Processing Unit and the local market in Manado and Bitung, North Sulawesi Rondonuwu, Synthia I; Berhimpon, Siegfried; Lasut, Markus T
AQUATIC SCIENCE & MANAGEMENT Vol 5, No 1 (2017): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.5.1.2017.24211

Abstract

Title (Bahasa Indonesia): Kandungan merkuri (Hg) pada ikan Meka (Xiphias sp.) di Unit Pengolahan Ikan dan Pasar Lokal di Manado dan Bitung, Sulawesi Utara Meka fish (Xiphias sp.) is one of the many marine products besides tuna fishery. It has potential and a competitive price to become a main product for exports from Indonesia. However, data about its quality, including heavy metals contain, is still lack. This study aimed to analyze the concentration of mercury (Hg) of the fish in three locations, i.e. the Fish Processing Unit, the local market in Manado, and Bitung. Fish consumption patterns of people living in Manado and Bitung and the risk of exposure to Hg to consumers based on the number of estimation of daily intake (EDI) and of Target Hazard Quotient (THQ) were also analyzed. The research found that there is a relationship between the concentration of Hg and the weight of the fish; the increase of weight is in line with the increase of Hg in which the greater weight of the fish is the higher levels of Hg. Further analysis showed that, based on the EDI, the amount of Hg that consumed by the community of Manado and Bitung is greater than WHO standards, and based on the THQ analysis, it was found the risk of Hg exposure to the community in Bitung. Di Indonesia, ikan meka (Xiphias sp.) merupakan salah satu dari produk perikanan selain tuna, yang potensial dan memiliki harga yang kompetitif untuk menjadi andalan ekspor. Namun, data tentang mutu ikan ini, termasuk kandungan logam berat, masih kurang. Penelitian ini bertujuan untuk menganalisis kandungan merkuri (Hg) pada daging ikan ini di tiga lokasi, yaitu Unit Pengolahan Ikan (UPI), pasar lokal di Manado, dan pasar lokal di Bitung. Pola konsumsi ikan meka dari masyarakat yang tinggal di Manado dan Bitung, dan risiko bahaya terpapar Hg terhadap konsumen berdasarkan estimation of daily intake (EDI) dan Target Hazard Quotient (THQ) juga dianalisis. Dari hasil penelitian ditemukan, bahwa terdapat hubungan antara berat ikan dan kandungan Hg; kenaikan berat ikan sejalan dengan kenaikan kandungan Hg. Dengan demikian, semakin besar berat ikan, maka akan semakin tinggi kandungan Hg. Hasil analisis EDI menunjukkan, bahwa jumlah Hg yang masuk ke dalam tubuh pada masyarakat Manado dan Bitung lebih besar dari standar WHO. Berdasarkan hasil analisis THQ ditemukan, bahwa masyarakat Bitung berisiko terpapar Hg.
Impact of fishing activities on the fisheries resources and Manado Bay Aquatic environment Sumampouw, Trine; Reppie, Emil; Lasut, Markus T
AQUATIC SCIENCE & MANAGEMENT Edisi Khusus 2 (2014): Oktober
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.0.0.2014.7308

Abstract

Manado Bay waters have long been known as a center of artisanal fisheries activities because of the availability of abundant fisheries resources. However,  continuous increase in technoligcal  development and fish resources demand make natural resources exploitation tend to destruct the  aquatic habitat and fish resources itself. Therefore, this study was aimed to inventory the types of fishing gears operated in Manado Bay; evaluate the possible impact on fish resources and environment; and analyze the status of fishing fisheries sustainability. This study was based on survey methods, through direct observation of fishing process and observations on the catch composition. Fisheries sustainability status was analyzed using Rapfish program. Common fishing gears used by fishermen in Manado Bay were multi hooks vertical hand line (noru), bottom hand line, trolling line, bottom long line, surface gill net, bottom gill net and traps. Fishing gears that do not have an impact on fish resources and environment is noru fishing, trolling and surface gill net, while bottom long line, bottom gill net and trap could potentially have negative impact on fish resources and physical seabed habitat. ordination sustainability status analysis of fishing fisheries in Manado Bay for each dimension is still considered as sustainable enough. Perairan Teluk Manado telah lama dikenal sebagai pusat aktivitas perikanan rakyat karena ketersediaan sumber daya ikan masih melimpah. Tetapi perkembangan teknologi dan permintaan sumber daya ikan yang terus meningkat menyebabkan pengeksploitasian sumber daya alam cenderung merusak habitat perairan dan sumber daya ikan itu sendiri. Oleh karena itu penelitian ini bertujuan untuk menginventarisir jenis-jenis alat tangkap yang dioperasikan di perairan Teluk Manado, mengevaluasi kemungkinan dampak alat tangkap terhadap sumber daya ikan dan lingkungan, dan menganalisis status keberlanjutan perikanan tangkap. Penelitian ini didasarkan pada metode survei, melalui pengamatan langsung terhadap proses penangkapan ikan dan mengamati keragaman komposisi hasil tangkapan. Status keberlanjutan perikanan dianalisis dengan program Rapfish. Alat tangkap yang umum digunakan oleh nelayan di perairan Teluk Manado terdiri dari yaitu pancing noru, pancing dasar, pancing tonda,  rawai dasar,  soma landra pajeko, soma landra rakit,  jaring insang dasar dan bubu. Alat tangkap yang tidak memberikan dampak terhadap sumber daya ikan dan lingkungan adalah pancing noru, pancing tonda, soma landra pajeko dan soma landra rakit. Sedangkan alat tangkap yang berpotensi memberikan dampak pada sumber daya ikan dan kerusakan fisik habitat dasar perairan adalah pancing dasar, rawai dasar, jaring insang dasar dan bubu. Hasil ordinasi status keberlanjutan perikanan tangkap di Teluk Manado yang dianalisis pada masing-masing dimensi masih tergolong cukup berkelanjutan.
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.
Kepekaan Cacing Laut Ophryotrocha diadema (Polychaeta: Dorvilleidae) terhadap Cemaran Metil Merkuri (MeHg) Lasut, Markus Talintukan; Pangkey, Henneke
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 15, No 3 (2010): October 2010
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v15i3.2594

Abstract

Susceptibility of the marine polychaete Ophryotrocha diadema (Polychaeta: Dorvilleidae) towards the neurotoxic methyl mercury (MeHg) contamination was studied in an experimental chamber, which was aimed to assess and compare the susceptibility level of the organism based on its generations (F0, F1, F2, and F3). Seven variables of growth and reproduction aspects were applied as indicators in this study; they were: 1) individual growth, 2) first time the egg laid, 3) number of eggs per individu, 4) number of eggs per egg mass, 5) number of eggs to larva per egg mass, 6) number of mortality per egg mass, and 7) reproductive potential. Observation was conducted on the treatment (MeHg in concentration of 0,00025 ppb) and the control (no MeHg) to each of the generations (F0, F1, F2, and F3). Data obtained were analysed for average and standard deviation. Comparison of susceptibility within the generations was calculated using the variable of reproductive potential. The results showed that there were differences between the treatments and the control for all of the variables. Comparison on the susceptibility of the polychaete within the generations to MeHg contamination was F0<F1=F3<F2. It was concluded that the F2 generation had the highest susceptibility among the others.
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
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 Erly Y. Kaligis, Erly Y. 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 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 Sadue, Andrew M. 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.