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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Journal of Marine Research Jurnal Harpodon Borneo Jurnal Kelautan Tropis Berdikari: Jurnal Pengabdian Masyarakat Indonesia Buletin Ilmiah Marina : Sosial Ekonomi Kelautan dan Perikanan MALLOMO: Journal of Community Service Journal of Fisheries & Marine
Agus Indarjo
Department Of Marine Science, Faculty Of Fisheries And Marine Science, Diponegoro University
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Earth & Planetary Sciences Education Environmental Science Languange, Linguistic, Communication & Media Social Sciences Other

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Determination of chlorophyll-a and its distribution in the waters of the mangrove forest rehabilitation area in Mojo Estuaria, Pemalang Maharani, Galung Dhiva; Indarjo, Agus; Hadibarata, Tony; Zainuri, Muhammad; Endrawati, Hadi; Redjeki, Sri; Pribadi, Rudhi; Rochaddi, Baskoro; Ismanto, Aris; Jihadi, Muhammad Shulhan
Jurnal Kelautan Tropis Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i2.23253

Abstract

Pemalang Regency has a mangrove area of around 2,839.44 but has been damaged reaching 453.38 Ha or about 16% of the existing area. This causes ecological functions in resisting abrasion, erosion, sedimentation, and carbon capture to decrease. Government efforts to restore the function of mangroves on the North Coast of Central Java carried out by rehabilitation require input from a water productivity approach. This study aims to determine the content and distribution of chlorophyll-a found in Pemalang Waters, Central Java. This was done by in situ observations in Pemalang Waters to see the fertility level of the waters, by purposive sampling at 20 sampling site, on April 30, 2024. The results obtained will be interpolated with ex situ data, including the Indonesian Earth Map (RBI), tidal data obtained from the SRGI website, flow data obtained from the Batnas website, and wind data obtained from the BMKG website. The next geospatial approach is ODV 4, Ms.Excel, and WR Plot application mapping; current analysis will be performed using ArcGIS 10.8 and Mike 21 applications; while the tidal analysis is carried out by the Admiralty method. The results of research conducted in Mojo Waters, Pemalang showed that the range of chlorophyll-a values was in the range of 1,858 - 41,287 mg / m3. The results were analyzed in sampling areas including rivers, estuaries, lagoons, eastern drift currents, western drift currents, waters still affected by estuaries, and the high seas. The distribution of chlorophyll values in these waters is the impact of nutrient supply from land because it is closely related to human activities, freshwater and seawater resuspension, drift currents, breaking waves, tidal currents. This causes the distribution pattern to occur from northeast to southwest.
Growth and Mortality Models of Mozambique Tilapia (Oreochromis mossambicus; Peters, 1852) Wildly Enter Inside the Fish Farming Ponds in Tarakan City, North Kalimantan Salim, Gazali; Mujiyanto, Mujiyanto; Sugianti, Yayuk; Suryanti, Suryanti; Zahidah, Zahidah; Nawir, Daud; Hartinah, Sitti; Nurjanah, Nurjanah; Dewi, Rose; Iranda, Rama; Arief, Mochamad Candra Wirawan; Putri, Masayu Rahmia Anwar; Rahman, Abdur; Indarjo, Agus; Ransangan, Julian; San Jose, Ariel E; Rozi, Rozi
Jurnal Ilmiah Perikanan dan Kelautan Vol. 16 No. 2 (2024): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v16i2.55472

Abstract

Graphical Abstract Highlight Research The results of this research showed that allometric growth in males and females had negative allometric growth characteristics. The growth condition index in male and female fish is dominated by thin and fat body shapes.The maximum length growth (L∞) and growth speed of males is higher than that of females. Total mortality and fishing mortality for males is higher than for females, but natural mortality for females is higher than for males. The exploitation rate of males and females is in the Under-exploitation category because the E value is <0.5. Abstract Exploring the length-weight relationship of fish and characterising growth parameters is essential in fisheries as they offer fundamental biology and population dynamics data to establish good management strategies for fisheries resources. This study examines the growth and mortality patterns of Oreochromis mossambicus. Data was collected between September and December 2022 using quantitative descriptive survey sampling. The study involved 20 repeats and deliberate random sampling of 30-50 fish per sample, emphasising total length, weight, and sex parameters. Based on 726 samples of O. mossambicus (352 fish identified as male and 374 fish identified as female). The growth model study revealed the typical negative allometric growth for both sexes (male and female). Male individuals attained a length of 33.449 cm after 37 days has a growth trend ± 0.3265 year-1, and females reached 21.150 cm in 34 days with a growth rate around 0.3135 year-1, as per the von Bertalanffy growth model. There were complex mortality patterns, with males contributing to most total deaths. This study emphasises the complex biology of tilapia and its untapped potential in the aquaculture pond system ecology in Tarakan.
Total Suspended Solid Concentration Dynamics and Distribution Based on Geospatial Models in Mojo River Estuary, Pemalang Aini, Firly Nur; Indarjo, Agus; Zainuri, Muhammad; Endrawati, Hadi; Redjeki, Sri; Pribadi, Rudhi; Setiyono, Heryoso; Suryoputro, Agus Anugroho Dwi
Buletin Oseanografi Marina Vol 13, No 2 (2024): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v13i2.64406

Abstract

Total suspended solids (TSS) concentrations and distribution provide information to determine the quality of the carrying capacity of waters as marine resources. The purpose of the research is to analyze the concentration and distribution of TSS in marine waters due to anthropogenic impacts on land. The concentration and distribution changes of TSS were analyzed using a geospatial model approach. The in-situ data were collected in September 2023 at 14 stations in the east monsoon and analyzed in the laboratory using the gravimetric method. The results show that TSS concentration range from 29.2–52.6 mg/L. The distribution of MPT content in the Mojo River Estuary, Pemalang has several groups of stations with convergent forms, where the high source of MPT comes from around the lagoon, namely the aquaculture and mangrove areas, then in general it is also affected by waste from anthropogenic activities of the, surrounding industries seasonal currents, which are related to wind and seasons, as well as currents due to waters from tides.
Pengembangan Ekowisata Hutan Mangrove di Pantai Tirang, Kecamatan Tugurejo, Kota Semarang Stephen, Joel; Suryono, Suryono; Indarjo, Agus
Jurnal Kelautan Tropis Vol 29, No 1 (2026): JURNAL KELAUTAN TROPIS (inpress)
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v29i1.30593

Abstract

The mangrove forest at Tirang Beach, Tugurejo District, Semarang City, is a mangrove conservation area utilized as a tourist destination. However, the mangrove forests in Semarang City face various threats, such as coastal abrasion, tidal flooding, and declining water quality. These coastal environmental dynamics have the potential to threaten the sustainability of mangrove ecotourism. Therefore, strategies are needed to manage the potential of mangrove forests as sustainable tourist destinations. This study aims to analyze the level of suitability and carrying capacity of mangrove ecotourism, as well as to formulate development strategies for mangrove forest tourism at Tirang Beach. The research was conducted from July to August at Tirang Beach, Tugurejo District, Semarang City. The research method used was a survey method through direct field observation and interviews with stakeholders. Observation station locations and respondents were determined using purposive sampling. The results indicate that the mangrove ecotourism area at Tirang Beach is supported by various tourism facilities, such as gazebos, food stalls, photo spots, a musala, and toilets. The Mangrove Tourism Suitability Index (IKW) was found to be 72.22%, categorized as quite suitable, while the Beach Tourism Suitability Index was 85.29%, which falls into the very suitable category. The maximum tourism carrying capacity was recorded at 314 visitors for an area of 11,650 m² with a four-hour visitation period. Tourism development at Tirang Beach can be pursued through infrastructure improvements, the establishment of local regulations, and the design of promotional strategies to enhance its tourist appeal. In addition, mangrove ecotourism development should focus on preparing a blueprint as a management concept based on education and on preparing human resources for its management.  Hutan mangrove di Pantai Tirang, Kecamatan Tugurejo, Kota Semarang, merupakan kawasan konservasi bakau yang dimanfaatkan sebagai destinasi wisata. Akan tetapi hutan mangrove di Kota Semarang menghadapi berbagai ancaman, seperti abrasi pantai, banjir pasang, serta penurunan kualitas perairan. Dinamika lingkungan pesisir tersebut berpotensi mengancam keberlanjutan ekowisata mangrove. Oleh karena itu, diperlukan strategi pengelolaan potensi hutan mangrove sebagai destinasi wisata yang berkelanjutan. Penelitian ini bertujuan untuk menganalisis tingkat kesesuaian dan daya dukung ekowisata mangrove, serta merumuskan strategi pengembangan wisata hutan mangrove di Pantai Tirang. Penelitian dilaksanakan pada bulan Juli hingga Agustus di Pantai Tirang, Kecamatan Tugurejo, Kota Semarang. Metode penelitian yang digunakan adalah metode survei melalui observasi langsung di lapangan serta wawancara dengan para pemangku kepentingan (stakeholder). Penentuan stasiun pengamatan dan responden dilakukan menggunakan metode purposive sampling. Hasil penelitian menunjukkan bahwa kawasan ekowisata mangrove di Pantai Tirang telah didukung oleh berbagai fasilitas penunjang wisata, seperti gazebo, warung, spot foto, musala, dan toilet. Nilai Indeks Kesesuaian Wisata (IKW) mangrove sebesar 72,22% yang tergolong cukup sesuai, sedangkan Indeks Kesesuaian Wisata pantai sebesar 85,29% yang termasuk dalam kategori sangat sesuai. Daya dukung wisata maksimum tercatat sebanyak 314 wisatawan pada luasan 11.650 m² dengan waktu kunjungan selama empat jam. Pengembangan wisata Pantai Tirang dapat dilakukan melalui peningkatan infrastruktur, penyusunan aturan lokal, serta perancangan strategi promosi untuk meningkatkan daya tarik wisata. Selain itu, pengembangan ekowisata mangrove perlu diarahkan pada penyusunan cetak biru (blueprint) sebagai konsep pengelolaan ekowisata berbasis edukasi serta penyiapan sumber daya manusia dalam pengelolaannya.
Strategi Pengembangan Ekowisata Rekreasi Pantai Berbasis Keterlibatan Stakeholder di Pantai Bandengan, Jepara Maulana Muhammad Isa; Ibnu Pratikto; Agus Indarjo
Journal of Marine Research Vol 14, No 2 (2025): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v14i2.41809

Abstract

Potensi pariwisata sebagai salah satu sumber devisa negara dan promosi panorama keindahan alam dan budaya bangsa. Salah satu potensi wisata yang ada di Indonesia yaitu Pantai Bandengan yang berada di Kabupaten Jepara, Provinsi Jawa Tengah. Potensi yang ada perlu dikembangkan dan dikelola secara berkelanjutan dengan sinergitas antar stakeholder. Penelitian ini dilakukan dari bulan Juli hingga September 2023, bertujuan untuk mengetahui indeks kesesuaian wisata, keterlibatan stakeholder serta perumusan konsep dan strategi pengembangan di Ekowisata Rekreasi Pantai Bandengan Jepara. Pengumpulan data dilakukan melalui survei lapangan dengan menggunakan 3 stasiun dan wawancara (kuesioner). Analisis data menggunakan analisis kesesuaian wisata dan analis swot untuk mengetahui rumusan strategi pengembangan. Hasil pengukuran Indeks Kesesuain Wisata atau IKW untuk Pantai Bandengan diperoleh nilai 94,4 %. Hasil terhadap analisis keterlibatan stakeholder di Pantai Bandengan Jepara menunjukkan stakeholder yang terlibat dalam pengelolaan berasal dari unsur pemerintahan (government) dan masyarakat (community). Stakeholder yang terlibat adalah: Pemerintah Daerah Kabupaten Jepara melalui Dinas Pariwisata dan Kebudayaan Jepara, Pengelola Objek Ekowisata Rekreasi Pantai Bandengan dan komunitas PKL Objek Ekowisata Rekreasi Pantai Bandengan serta masyarakat lokal. Pemetaan stakeholder berdasarkan kepentingannya terdiri dari stakeholder primer yaitu komunitas PKL dan masyarakat lokal, serta stakeholder sekunder yaitu Dinas Pariwisata dan Kebudayaan Jepara dan Pengelola Objek Ekowisata Rekreasi Pantai Bandengan. Adapun hasil analisis stakeholder berdasarkan kepentingan dan pengaruh, yakni sebagai subyek (subjects) dan pemain kunci (key player). Hasil SWOT untuk strategi pengembangan Ekowisata Rekreasi Pantai Bandengan Jepara yaitu: pengoptimalan kelestarian alam kawasan wisata, sinergitas antar stakeholder dalam pelaksanaan dan pengembangan pemberdayaan masyarakat akan sadar wisata dengan diaktifkan kembali pokdarwis, pengoptimalan daya jual kawasan dalam menarik investor dan promosi kawasan. The potential for tourism as a source of foreign exchange for the country and the promotion of a panoramic view of the nation's natural and cultural beauty. One of the tourism potentials in Indonesia is Bandengan Beach which is located in Jepara Regency, Central Java Province. Existing potential needs to be developed and managed sustainably with synergy between stakeholders. This research was conducted from July to September 2023, aiming to determine the tourism suitability index, stakeholder involvement and the formulation of development concepts and strategies in Bandengan Beach Jepara Recreational Ecotourism. Data collection was carried out through field surveys using 3 stations and interviews (questionnaires). Data analysis uses tourism suitability analysis and SWOT analysis to determine the formulation of development strategies. The results of measuring the Tourism Suitability Index or IKW for Bandengan Beach obtained a value of 94.4%. The results of the analysis of stakeholder involvement at Bandengan Beach in Jepara show that the stakeholders involved in management come from government and community elements. The stakeholders involved are: Jepara Regency Regional Government through the Jepara Tourism and Culture Office, Bandengan Beach Recreational Ecotourism Object Management and the Bandengan Beach Recreational Ecotourism Object PKL community as well as the local community. Stakeholder mapping based on their interests consists of primary stakeholders, namely the street vendor community and local communities, as well as secondary stakeholders, namely the Jepara Tourism and Culture Office and the Bandengan Beach Recreational Ecotourism Object Manager. The results of the stakeholder analysis are based on interests and influence, namely as subjects and key players. The SWOT results for the Bandengan Jepara Beach Recreational Ecotourism development strategy are: optimizing the natural sustainability of the tourist area, synergy between stakeholders in the implementation and development of community empowerment to become aware of tourism by re-activating the local community groups, optimizing the selling power of the area in attracting investors and promoting the area.
Analisis Kesesuaian Wisata dan Daya Dukung Kawasan di Pantai Kuta Mandalika, Lombok Nusa Tenggara Barat Nisrina Audini; Agus Indarjo; Nur Taufiq-Spj
Journal of Marine Research Vol 14, No 4 (2025): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v14i4.35646

Abstract

Kuta Mandalika merupakan salah satu destinasi wisata di Lombok yang menjadi prioritas utama kunjungan wisatawan. Mandalika memiliki konsep pengembangan pariwisata yang berbasis wawasan lingkungan. Daya dukung kawasan mempunyai keterkaitan dengan pengelolaan secara berkelanjutan, artinya dalam pengembangan wisata untuk peningkatan ekonomi hendaknya memperhatikan aspek ekologis. Penelitian ini bertujuan untuk mengetahui kualitas perairan yang menjadi daya dukung untuk kesesuaian kawasan wisata dan menyusun alternatif strategi pengelolaan untuk pengembangan wisata Pantai Kuta Mandalika, Lombok. Penelitian ini menggunakan metode deskriptif dan purposive sampling untuk pengambilan data, analisis parameter fisika dan kimia, analisis kesesuaian wisata, dan analisis daya dukung kawasan. Kesesuaian kawasan Pantai Kuta Mandalika, Lombok dinilai sangat cocok untuk kegiatan rekreasi pantai, berenang, snorkeling, diving serta aktifitas wisata air lainnya. Hasil perhitungan Indeks kesesuaian wisata menunjukkan nilai di atas 80% yang termasuk kategori S1 atau Sangat Sesuai. Daya Dukung Kawasan di wilayah Pantai Kuta Mandalika mengindikasikan bahwa kawasan ini dapat menampung 105 orang per hari untuk kegiatan rekreasi pantai. Strategi pengelolaan dan pengembangan kawasan wisata dapat dilakukan dengan cara pemaksimalan promosi wisata, menyediakan aktraksi-aktraksi wisata, pengoptimalan penyerapan tenaga kerja dengan meningkatkan kualitas sumber daya manusia yang ada. Pembatasan jumlah pengunjung wisatawan bertujuan untuk menjaga kualitas kenyaman sekaligus agar tidak melebihi daya dukung kawasan wisata.
Analisis Kesesuaian dan Daya Dukung Wisata Mangrove Nusawiru dan Batukaras, Pangandaran, Jawa Barat Chara Julia Dara; Rini Pramesti; Agus Indarjo
Journal of Marine Research Vol 14, No 4 (2025): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v14i4.50446

Abstract

Hutan mangrove Nusawiru dan Batukaras merupakan kawasan yang memiliki berbagai fungsi seperti fungsi edukatif, ekologis dan ekonomi. Salah satu fungsi ekonominya adalah sebagai kawasan ekowisata. Tujuan penelitian ini adalah untuk menganalisis tingkat kesesuaian dan daya dukung kawasan ekowisata Hutan Mangrove Nusawiru dan Batukaras. Metode yang digunakan dalam penelitian ini adalah metode survei dengan pendekatan kuantitatif meliputi analisis IKW dan DDK serta kualitatif dengan wawancara. Hasil daya dukung kawasan dapat menampung pengunjung sebanyak 312 orang tanpa merusak lingkungan dan indeks kesesuaian wisata kedua lokasi masuk dalam kategori “sesuai” untuk dikembangkan sebagai destinasi ekowisata.
Co-Authors Abda Abda Abdul Jabarsyah Abdur Rahman Adhyaksa Saktika Drestanto Agus Sabdono Aini, Firly Nur Alin Fithor Ambariyanto Ambariyanto Andi Izza Naafilah Ari B Abdulah Arief, Mochamad Candra Wirawan Aris Ismanto Asriadi Ayu Tri Fatma Ayu Tri Fatwa Baskoro Rochaddi Chara Julia Dara Chrisna Adhi Suryono Denny Hendrik Nainggolan Dian Wijayanto Dinar Isyana Syah Rani Dwi Puspa Arini Fahrizal Amir Gazali Salim Gigih Budhiawan GS , Achmad Daengs Hadi Endrawati Hariyadi Hariyadi Heryoso Setiyono Himavan Prathista Nugraha Ibnu Pratikto Ibnu Pratikto Indah Susilowati Indriani Widhianingrum Iranda, Rama Irwani Irwani Jihadi, Muhammad Shulhan Joko Sutrisno Julian Ransangan Julian Ransangan Kun Retno Handayani M.Aslan, La Ode Maharani, Galung Dhiva Masayu Rahmia Anwar Putri, Masayu Rahmia Anwar Maulana Muhammad Isa Mazlan Mufrida Zein Mufrida Zein Muhammad Arif Romadhi Muhammad Firdaus Muhammad Helmi Muhammad Zainuri Mujiyanto Mujiyanto N. Nurjanah Nabila Nasrul Nawir, Daud Nisrina Audini Noor Zuhry, Noor Nugraeni, Christine Dyta Nugroho Agus D Nur Taufiq-Spj Ody Prajeki, Ody Permana Ari Soejarwo Permana Ari Soejarwo Permana Ari Soejarwo Prakoso, Lukman Yudho Raden Ario Rahadiya, Ardaffa Firdausy Ransangan, Julian Rezkyana Riky Rizky Rini Pramesti Rose Dewi Rozi Rozi, Rozi Rudhi Pribadi Rukisah, Rukisah Rusli Salim, Nasiatul Aisyah San Jose, Ariel E Satrioajie, Widhya Nugroho Setyani, Wilis Ari Sitti Hartinah DS Sri Redjeki Stephanie Bija Stephen, Joel Supriadi Supriadi Suriyanti Surya Agung Nugroho Suryanti Suryono Suryono Susiyanti Susiyanti Tony Hadibarata, Tony Widianingsih Widianingsih Wilis Ari Setyani Wilis Ari Setyati Wisnu Widyatmoko Yayuk Sugianti Yen Thi Hong Pham Yen Thi Hong Pham Yesaya Putra Pamungkas Zahidah Zahidah, Zahidah