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All Journal AGRISAINS AQUATIC SCIENCE & MANAGEMENT e-Journal BUDIDAYA PERAIRAN JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI
Joshian N.W. Schaduw
Fakultas Perikanan dan Ilmu Kelautan, Universitas Sam Ratulangi, Manado, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Environmental Science

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Journal : AQUATIC SCIENCE

 1 
Land suitability of seaweed farming in Minahasa Regency, North Sulawesi Province Schaduw, Joshian N. W; Ngangi, Edwin L. A; Mudeng, Joppy D
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.1.1.2013.1972

Abstract

The success of seaweed cultivation is determined from the determination of the location. This is because the production and quality seaweed influenced by ecological factors including the condition of the substrate surface waters, water quality, climate, geographical bottom waters. Arakan villages in the District of South Minahasa regency become one of the centers of seaweed cultivation in the province of North Sulawesi. The specific objective of this study was obtained in the form of a map of suitability mapping seaweed cultivation areas; gathering data and information about the extent of the area, water capacity, area unit, and carrying water. The study was conducted in the waters of the village of Arakan, District Tatapaan, South Minahasa regency, North Sulawesi. When phase 3 study conducted every month from June to December in 2012. The analysis is based on space availability, suitability waters that support the cultivation of seaweed. Suitability space spatially waters using physical and chemical parameters of waters which is a prerequisite eligibility seaweed cultivation. Spatial observations by using a Geographic Information System (GIS) for the weights and scores in determining the suitability of land. Process is done through the preparation of spatial database and
Small island mitigation based on mangrove ecosystem management in Bunaken National Park Schaduw, Joshian N.W
AQUATIC SCIENCE & MANAGEMENT Vol 1, No 2 (2013): Oktober
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.1.2.2013.7275

Abstract

Small islands are susceptible to many environmental impacts. Impacts affecting ecological processes include climate change, sea level rise, natural disasters, abrasion, sedimentation, erosion and pollution. To minimize vulnerability the assessing the effectiveness of mitigation measures in these coastal ecosystems is urgently needed. This research analyzes vulnerability of a small island mangrove ecosystem and the effectiveness of management strategy for mangrove ecosystem based mitigation. This research uses both primary and secondary data. Primary data was gathered by sampling, field observation, and questionnaire analysis. Vulnerability index was analyzed using multi-dimensional scaling method, and vulnerability mapping was analyzed by using geographic information system (GIS) using the software Arcview Project 3.3. Stakeholder analysis was used for patterns and strategic management, through a technique SMART (Simple Multi Attribute Rating Technique) using the software Criterium Decision Plus. The results show that Bunaken Island has the highest vulnerability level, followed by the island of Manado Tua, Nain, and the lowest level was found in Mantehage island. The most important factor of vulnerability in the small island Bunaken National Park is the area of mangrove ecosystem. Increased area of mangrove ecosystem will increase the effectiveness as a buffer zone as well as increase the capacity of the ecosystem on the social, economic, and governance dimensions. A management scheme which can accommodate a variety of problems faced by the mangrove ecosystem of small islands is a collaborative management by the government as the leading sector, with the highest priority on the management of the ecological dimension. Pulau-pulau kecil merupakan daerah yang rentan terhadap berbagai faktor. Salah satu faktor yang mempengaruhi adalah faktor ekologis. Faktor ekologi meliputi perubahan iklim, kenaikan permukaan air laut, bencana alam, abrasi, sedimentasi, erosi dan polusi. Untuk meminimalkan kerentanan, efektivitas ekosistem pesisir sangat dibutuhkan. Penelitian ini menganalisis kerentanan pulau kecil, efektivitas ekosistem mangrove, dan strategi pengelolaan ekosistem mangrove berbasis mitigasi. Penelitian ini menggunakan data primer dan sekunder. Data primer dikumpulkan melalui sampling, observasi lapangan, dan angket. Kerentanan dianalisis menggunakan metode multidimensional scaling, sedangkan pemetaan kerentanan dianalisis dengan sistem informasi geografis menggunakan perangkat lunak ArcView 3.3. Analisis Stakeholder digunakan untuk pola dan manajemen strategi, melalui teknik SMART (Simple atribut teknik Peringkat multi) dengan menggunakan perangkat lunak Criterium Decision Plus. Hasil penelitian menunjukkan Pulau Bunaken memiliki tingkat kerentanan tertinggi, diikuti oleh Pulau Manado Tua, Nain, dan Pulau Mantehage terendah. Faktor utama kerentanan di pulau kecil Taman Nasional Bunaken adalah luasan ekosistem mangrove. Peningkatan kawasan ekosistem mangrove akan meningkatkan efektivitas ekosistem mangrove sebagai buffer zone serta meningkatkan kapasitas ekosistem ini pada dimensi sosial, ekonomi, dan pemerintahan. Pola pengelolaan yang dapat menampung berbagai masalah yang dihadapi oleh ekosistem mangrove pulau-pulau kecil adalah kolaboratif manajemen dengan prioritas utam pada pengelolaan dimensi ekologi dan pemerintah sebagai leading sector.
Management strategies for dive sites in Bunaken Island (North Sulawesi, Indonesia), based on stakeholder’s perceptions Kamagi, Jongky W.A.; Schaduw, Joshian N.W.; Lasut, Markus T.
AQUATIC SCIENCE & MANAGEMENT Vol 4, No 2 (2016): Oktober
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.4.2.2016.14449

Abstract

Title (Bahasa Indonesia): Strategi pengelolaan untuk daerah penyelaman berdasarkan persepsi stakeholder di Pulau Bunaken, Sulawesi Utara, Indonesia Bunaken Island is one of the island located in the Bunaken National Park, North Sulawesi, Indonesia. Most of the diving activities are in the waters of Bunaken Island, in which the management involves stakeholders (public, tourists, policy makers, NGOs, and academia). This study used questionnaires as a research instrument to obtain primary data, while secondary data were used as a complement to formulate an alternative strategy, using SWOT analysis. Based on the stakeholders’ perception, dive site management strategies covered research development on environmental issues, regulation availability, carrying capacity and information, community empowerment in addressing environmental problems, coordination among stakeholders for institutional issues and the environment, and improvement of service managing institutions in terms of organizational management and risk management. The study recommended the need for a clear management strategy, the necessity of doing research for regional development strategies/ locations for both diving and other potentials, the need of good marketing strategy, and the need for tourism activities diversification. Pulau bunaken merupakan salah satu pulau yang berada di dalam Taman Nasional Bunaken, Sulawesi Utara, Indonesia. Sebagian besar aktivitas penyelaman berada di Pulau Bunaken di mana dalam pengelolaannya melibatkan stakeholder (masyarakat, wisatawan, pengambil kebijakan, LSM, dan akademisi). Penelitian ini menggunakan instrumen kuesioner sebagai alat pengumpul data primer; data sekunder dikumpulkan sebagai pelengkap untuk merumuskan alternatif strategi, menggunakan analisis SWOT. Hasil analisis menunjukkan, secara umum, bahwa strategi pengelolaan daerah penyelaman, berdasarkan persepsi stakeholder, meliputi: pengembangan penelitian untuk isu-isu lingkungan; ketersediaan regulasi, pengelolaan pengunjung (daya dukung) dan informasi; pemberdayaan masyarakat dalam mengatasi masalah lingkungan; koordinasi antar stakeholder untuk isu-isu kelembagaan dan lingkungan; dan peningkatan pelayanan lembaga pengelola dalam hal manajemen organisasi maupun manajemen resiko. Penelitian ini merekomendasikan perlu adanya strategi pengelolaan yang jelas, perlu dilakukan penelitian untuk strategi pengembangan daerah/lokasi untuk objek wisata baik wisata selam maupun wisata lainnya, perlu strategi pemasaran yang baik, dan perlu diversifikasi aktivitas kegiatan pariwisata.
Community structure of mangrove at Marine Tourism Park of Kupang Bay, East Nusa Tenggara Bessie, Donny M; Schaduw, Joshian N; Reppie, Emil; Lasut, Markus T
AQUATIC SCIENCE & MANAGEMENT Edisi Khusus 1 (2013): Mei
Publisher : Graduate Program of Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.0.0.2013.2270

Abstract

Mangrove gives major contributions to fishery production; however, due to an increasing demand of space for human activities, mangrove area is changed to many forms, such as settlement, industry, and recreation; beside lack of data and information available (biophysics, socio-economic, and culture). These may cause economical and ecological conflicts. This condition is currently happened in Marine Tourism Park of Kupang Bay (MTPKB). Accordingly, this study aims to analyze community structure of mangrove at MTPKB using survey method to observe mangrove vegetation and exploitation impact by community. In this study, 16 species of 9 families were found with categorized density from “rare” (20 individual/hectare) to “dense” (5.450 individual/hectare). The ecosystem was found has low diversity; it was due to high dominant index. Rhyzophora apiculata and Sonneratia alba were found two species which have big role in the marine park© Mangrove memberikan kontribusi yang besar terhadap produksi perikanan; namun, oleh karena kebutuhan manusia yang semakin meningkat, daerah mangrove dirubah menjadi daerah pemukiman, industri, dan rekreasi; di samping kurangnya data dan informasi yang tersedia. Hal ini dapat menimbulkan konflik secara ekonomi dan ekologi. Kondisi ini sedang terjadi di Taman Wisata Alam Laut Teluk Kupang (TWALTK). Oleh karena itu, penelitian ini dilakukan di mana bertujuan menganalisis struktur komunitas mangrove di TWALTK dengan menggunakan metode survei untuk melakukan pengamatan terhadap vegetasi mangrove dan aktifitas masyarakat dalam memanfaatkannya. Dalam penelitian ini ditemukan 16 jenis mangrove dari 9 famili dengan kerapatan terkategori dari ‘jarang’ (20 pohon/hektar) hingga ‘padat’ (5.450 pohon/hektar). Keanekaragaman ekosistem tersebut rendah karena tingginya nilai dominasi. Jenis Rhyzophora apiculata dan Sonneratia alba merupakan jenis yang memberikan pengaruh besar terhadap komunitas mangrove di taman wisata alam laut tersebut©
Analysis for mangrove ecosystem management priority using Analysis Hierarchy Process (AHP) in Sorong City, West Papua, Indonesia Tabalessy, Roger R; Wantasen, Adnan S; Schaduw, Joshian N.W.
AQUATIC SCIENCE & MANAGEMENT Vol 1, No 2 (2013): Oktober
Publisher : Graduate Program of Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.1.2.2013.7285

Abstract

Indonesia’s mangrove forest is decreasing. Factors affecting this condition are excessive utilization for livelihood and market demand without considering its sustainability for the future. As a result, mangrove forest degrades year by year. The present study aimed to analyse which stakeholder is the priority for mangrove ecosystem management in the city of Sorong, West Papua, Indonesia, and which factors are the priority for sustainable management. Primary data were collected using questionnaire with interview technique and were analysed using Expert Choice 11 software. The result showed that local government was the stakeholder possessing major priority in management which was supported by others (community and NGO), and the ecological factor was the priority in management, while the economic, social, and institutionalfactors were the supporting factors for sustainability. Luas hutan mangrove di Indonesia sedang mengalami penurunan. Faktor yang mempengaruhi kondisi ini, yaitu pemanfaatannya secara berlebihan untuk memenuhi kebutuhanan hidup maupun permintaan pasar tanpa mempertimbangkan keberlanjutannya di masa depan. Sebagai akibatnya tutupan hutan mangrove semakin berkurang dari tahun ke tahun. Penelitian ini bertujuan menganalisis stakeholder manakah yang menjadi prioritas dalam pengelolaan ekosistem mangrove di Kota Sorong, Papua Barat, Indonesia, dan faktor manakah yang menjadi prioritas dalam pengelolaan secara berkelanjutan. Data primer dikumpulkan menggunakan angket dengan teknik wawancara, dan kemudian dianalisis menggunakan software Expert Choice 11. Hasil penelitian menunjukkan bahwa stakeholder Pemda merupakan prioritas utama dalam pengelolaan ekosistem mangrove dan ditopang oleh stakeholder lainnya (Masyarakat dan LSM), dan faktor prioritas dalam pengelolaan adalah ekologi, sedangkan faktor ekonomi, sosial, dan kelembagaan merupakan faktor pendukung untuk terciptanya pengelolaan ekosistem mangrove yang berkelanjutan.
Percentage of mangrove canopy coverage and community structure in Batanta Island and Salawati Island, Raja Ampat District, West Papua Province Schaduw, Joshian N.W.
AQUATIC SCIENCE & MANAGEMENT Vol 8, No 1 (2020): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.8.1.2020.32426

Abstract

The research aimed at monitoring the condition of mangrove communities in Batanta Island and Salawati Island, Raja Ampat District, West Papua Province. It used method developed by the Indonesian Institute of Sciences Research Center for Oceanography (P2O LIPI). Method in determining the percentage for the coverage of mangrove communities used a hemispherical photography and the data analysis used ImageJ software in excel tabulation. The result showed that mangrove canopy coverage has decreased from 85.73% in 2017 to 84.14% in 2018. Since the observations in 2015, the percentage of mangroves had no significant change. In average the percentage increased as much as 3.45% from 75.09% in 2015 to 78.54% in 2016. Moreover, it increased again by 7.20% in 2017 (85.73%). It indicates that the average change percentage of mangroves is not significant, and it can be concluded that the mangrove ecosystem in this area does not degrade significantly and has a good growth rate. The average density value was 1254.3 trees per hectare in the period of 2016-2018 or it increased to about 16.5% since 2015. The number of species found at the observation site were 5 species (Rhizophora mucronata, Rhizophora apiculata, Bruguiera gymnorrhiza, Sonneratia alba, and Xylocarpus granatum) scattered in eight observation stations. From these results it can be concluded that mangrove condition at the research location is stable and gets support for the survival of biota associated therein.
Impact of tropical cyclone Amang on variability of wind speed, salinity, sea surface temperature, and their relationship to chlorophyll-a in sea waters of Sangihe Island Rachim, M. Hatta; Schaduw, Joshian N.W.; Wantasen, Adnan S.; Patty, Wilhelmina; Ngangi, Edwin L.A
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.v9i2.34589

Abstract

High concentrations of chlorophyll-a can be used to predict where fish gather. On the other hand, tropical cyclones are one of the triggering factors for vertical stirring and upwelling that cause fertility of waters. The Sangihe Island area is not an effective area for the formation of tropical cyclones. However, due to its geographical location with a tropical cyclone area and trajectory, the potential for disturbances caused by cyclones is impactful on Sangihe Island. The distribution of wind speed, salinity, sea surface temperature and chlorophyll-a concentration can be detected by satellite remote sensing imagery. This study aims to analyze the impact of Tropical Cyclone Amang on the variability of wind speed, salinity, sea surface temperature and on the concentration of chlorophyll-a in Sangihe Island. This study useswind speed, salinity, sea surface temperature and chlorophyll-a data during the Amang Tropical Cyclone (January 6-27, 2019) from the AQUA-MODIS satellite imagery. The results show that the relationship between wind speed and chlorophyll-a concentration has impact on other parameters where both parameters showed a strong correlation value. It was also showed on the relationship between sea surface temperature and chlorophyll-a.However, the relationship between salinity and chlorophyll-a concentration showed lowest effect among those parameters.Indonesian title: Dampak siklon tropis Amang terhadap variabilitas kecepatan angin, salinitas, suhu permukaan laut, dan hubungannya dengan klorofil-a di perairan laut Pulau Sangihe
Co-Authors Adnan Wantasen Agung B. Windarto, Agung B. Alam, Muhammad Reza Sinar Alfret Luasunaung Angkouw , Esther Dellayani Antonius Rumengan Ari B Rondonuwu, Ari B Ari B. Rondonuwu Ari Berty Rondonuwu Bachmid, Fihri Bessie, Donny Mercys Bonde, Alis Febri Boneka, Farnis B. Boneka Calvyn F. A. Sondak, Calvyn F. A. Carolus Paulus Paruntu Coloay, Clive Griffen Daisy Monica Makapedua Darus S. Paransa Deiske Adeliene Sumilat, Deiske Adeliene Dietriech Geoffrey Bengen Edwin D Ngangi Emil Reppie Fauzanabri, Renno Fransine B. Manginsela Fredinan Yulianda Gaspar D. Manu, Gaspar D. Gedoan, Verdinand Hens Onibala Ilaria, Christabella Louisa Imanuel, Tonny Indri Manembu Isdradjad Setyobudiandi Janny D Kusen Joppy Mudeng Jumeini, Jumeini Kainde, Henry Valentino Florensius Kamagi, Jongky W.A. Kamuntuan, Reffando Alfaro Fabio Fabien Kondoy, Khristin I. F Kumampung, Deislie R.H. Kusen, Janny Lalita, Jans D.J Legi, Kunio Lintang, Rosita Anggreiny J Luasunaung, Alfrets Mahmud, Maudy Rusmini Mamangkey, Noldy G.F Mamuaja, Jane M. Manengkey , Hermanto W.K. Manengkey, Hermanto W. K Manginsela, Fransine B Manoppo, Victoria E. N. Mantiri, Desy M. H Markus T. Lasut Medy Ompi Menajang, Febry S. I Mokolensang, Jeffrie Molle, Ben Arther Moningkey, Rudy D. Musak, Putra Natalie D Rumampuk Nity, Elroi Ode Mantra, Syahrun Oroh, Dannie R S Pantouw, Toar Paransa, Darus S.J. Paulus, James J. H. Pelle, Wilmy Pelle, Wilmy E. Podung, Thania Theresia Rachim, M. Hatta Rangan, Jety Rangan, Jety K. Ridwan Lasabuda Robert A. Bara Roeroe, Kakaskasen Andreas Roeroe, Wailan Roger R Tabalessy Rondonuwu, Arie B. Ronoko, Stephen Rose O. S. E. Mantiri, Rose O. S. E. Royke M. Rampengan Rumampuk, Natalie Detty C. Rumengan, Antonius Petrus Sanadi, Troy Sandra Tilaar Sangari, Joudy R. R. Sasauw, Juwinda Sinjal, Chatrien A. L Sitanggang, Gorga Renaldi Stenly Wullur Sundah, Geraldo Thimoty Suria Darwisito, Suria Tangkudung, Maureen J. N. N. Togolo, Festy Tungka, Amelia Undap , Suzanne Lydia Veibe Warouw Verisandria, Rio Wilhelmina Patty Windarto, Firhansyah C. Yostan Lahabu, Yostan