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All Journal Sodality: Jurnal Sosiologi Pedesaan Jurnal Ilmu dan Teknologi Kelautan Tropis ILMU KELAUTAN: Indonesian Journal of Marine Sciences
Elson, La
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Arts Humanities Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Environmental Science Library & Information Science Social Sciences

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Acoustic Detection and Quantification of Fish in Lancang Waters of Seribu Islands, Indonesia Purnawan, Syahrul; Manik, Henry M.; Manik, Agustina Sartika; Elson, La; Kang, Myounghee
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 2 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.2.181-190

Abstract

Sound propagates effectively through the water column, establishing hydroacoustic technology as a premier method for underwater exploration, including the mapping of aquatic ecological resources. While the fisheries sector is considered pivotal in aquatic resource studies, mapping fisheries remains challenging due to the distinct distribution patterns exhibited by fish within the water column, which are intricately linked to their habitat preferences. In this study, the hydroacoustic method was employed to analyze the distribution of fish in the waters surrounding Lancang Island, Seribu Islands, Jakarta.  This analysis utilized the target strength (TS) value alongside oceanographic parameters. Acoustic data was collected using a 200 kHz single beam echosounder based on parallel transects encircling the waters of Lancang Island. CTD was utilized to collect oceanographic data to acquire temperature and salinity profiles within the water column. The acoustic data processing was conducted using the post-processing software SONAR 5-pro. The analysis was performed based on acoustic cells, obtained by dividing segments every 100 m horizontally and layers every 5 m vertically, thereby obtaining the Target Strength per cell (TSc) and volume backscattering strength (SV) values from each cell. The results showed that the highest average TSc value was found in the depth range of 26-31 m at -46.98 dB, and the highest SED biomass was also found in the same depth range at 26.6 kg.ha-1. Based on the analysis of water temperature and salinity, it was found that these factors significantly influence the distribution of fish in the waters of Lancang Island (R-square= 0.1276 and P< 0.05). This finding also indicates the presence of other parameters affecting fish distribution in Lancang waters, with the type of substrate and habitat emerging as potential determining factors, notably in coral reef environments.  
Mengukur Pencapaian Tujuan Pembangunan Berkelanjutan di Pedesaan: Studi Kasus Desa Sukamantri di Kabupaten Bogor, Jawa Barat, Indonesia Sjaf, Sofyan; Kaswanto, Kaswanto; Kuniawati Hidayat, Nia; Ardinal Barlan, Zessy; Elson, La; Sampean, Sampean; Firda F Gunadi, Hanifa
Sodality: Jurnal Sosiologi Pedesaan Vol. 9 No. 2 (2021): Sodality: Jurnal Sosiologi Pedesaan
Publisher : Departement of Communication and Community Development Sciences, Faculty of Human Ecology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22500/9202133896

Abstract

A village is an arena for sustainable development where economic, social, cultural, environmental and political interactions occur. It has a strategic meaning for the successful achievement of the 17 indicators of Sustainable Development Goals (SDGs). However, villages have limitations in providing data and indicators to measure the achievement of SDGs based on RW. The aims of this study are to provide Precision Village Data (DDP) and use it to measure and analyze the achievement indicators of 16 out of 17 village SDGs. One of SDGs 14, namely the marine ecosystem is not measured because the research location is a terrestrial village with an altitude of 423-902 m ASL. The use of DDP in the research location with normalization and aggregation methods based on arithmetic averages made this study successful in calculating the scores of each village SDGs. Then the results of the analysis of the village DDP and SDGs were combined with spatial mapping. The results showed that the SDGs in Sukamantri Village cumulatively achieved quite good results. A total of 3 SDGs was classified as very good, 4 SDGs were classified as good, 3 SDGs were classified as good enough, 5 SDGs were lacking, and 2 SDGs were poorest. Referring to the SDGs index calculation for Sukamantri Village, the environmental pillar has the highest score and is on average very good. However, the social and economic pillars are in the poor category, the law and governance pillars are in the poorest category. This means that sustainable development in Sukamantri Village has not been achieved. The natural wealth in Sukamantri Village has not been managed to achieve the fulfillment of basic human rights that are of a just and equal quality, for the well-being of the villagers and the realization of inclusive and quality economic growth.
KUANTIFIKASI HAMBUR BALIK AKUSTIK DASAR LAUT MENGGUNAKAN SCIENTIFIC SINGLE BEAM ECHOSOUNDER Manik, Henry Munandar; Totok Hestirianoto; Sri Pujiyati; Elson, La
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 14 No. 1 (2022): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v14i1.37184

Abstract

Teknologi hidroakustik mampu melakukan kuantifikasi terhadap substrat dasar laut dan dapat memperkirakan secara akurat dan mendekati real time terhadap karakter akustik yang dimiliki oleh masing-masing jenis substrat. Tujuan dari penelitian ini adalah melakukan kuantifikasi hambur balik akustik dasar laut dalam upaya pengembangan teknologi informasi kelautan. Akusisi data menggunakan instrumen akustik Single Beam Echosounder Simrad EK-15 pada frekuensi 200 kHz. Pengolahan dan analisis data meliputi hambur balik akustik, tipe sedimen, komputasi acoustics bottom backscattering substrat dasar laut dan analisis spasial acoustic backscattering dasar laut di perairan Pulau Lancang. Hasil penelitian ini menunjukkan bahwa nilai hambur balik akustik substrat dasar laut berdasarkan nilai SS dan ukuran partikel di setiap stasiun sampling yaitu tipe substrat pasir -21,08 dB sampai -24,55 dB, pasir halus -25,67 dB sampai -26,67 dB, dan pasir halus sekali berkisar antara -27,42 dB sampai -28,03 dB. Berdasarkan rentang nilai hambur balik akustik yang didapatkan dari stasiun sampling diperoleh klasifikasi jenis substrat dasar laut di sepanjang lajur survei yaitu pasir kasar sekali, pasir kasar, pasir sedang, pasir halus, pasir halus sekali, lanau kasar, lanau sedang, lanau halus, lempung kasar dan lempung halus pada rentang nilai -47,85 dB sampai -17,07 dB. Substrat pasir paling banyak ditemukan di lokasi penelitian dengan komposisi yang lebih besar dibandingkan dengan lanau dan lempung. Nilai hambur balik akustik sangat dipengaruhi oleh ukuran partikel, bentuk morfologi dan relief dasar laut.
Co-Authors Firda F Gunadi, Hanifa Henry Munandar Manik Hestirianoto, Totok Kang, Myounghee Kuniawati Hidayat, Nia Manik, Agustina Sartika Sampean, Sampean Sofyan Sjaf Sri Pujiyati Syahrul Purnawan Zessy Ardinal Barlan