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4TEFFECTS OF GRAIN SIZE, ROUGHNESS, AND HARDNESS OF SEA FLOOR ON BACK SCATTERING VALUE BASED ON HYDROACOUSTIC DETECTION Pujiyati, Sri; Hartati, Sri; Priyono, Wijo
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 2, No 1 (2010): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Jurnal Ilmu dan Teknologi Kelautan Tropis

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Abstract

3TBased on results of detection hydroacoustic, backscattering value from the first reflection (E-1) can describe the roughness and from the second reflections (E-2) can describe the hardness of sea floor. The objective of this study was to analyze the relationship between grain size, roughness and hardness with backscattering values using the hydroacoustic method. The results showed that the roughness, hardness, and diameter size fraction of fine sand substrate were greater than that of muddy sand substrate. The backscattering values of very fine sand substrate were also greater than that of muddy sand substrate.Keywords: Hydroacoustic, bottom, backscattering
THE IMPACT OF ACCLIMATIZATION OF VARIOUS SALINITY TO AGAINTS MORTALITAS RATE AND BEHAVIOUR FISH GUPPY (POECILIA RETICULATA) AS A SUBTITUTE FOR FISH BAIT SKIPJACK (KatsuwonusPelamis) Lubis, Muhammad Zainuddin; Pujiyati, Sri
JURNAL TEKNOLOGI PERIKANAN DAN KELAUTAN Vol 4, No 2 (2013): November 2013
Publisher : Fakultas Perikanan dan Ilmu Kelautan

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Abstract

Acclimatization is physiological adaptation way or a way from a species to adjust itself with new environment. The purpose of this research is to observe the process of salt level acclimatization in Guppy fish (Poecilia reticulate). Salt level about 2 g/mol was added in the water or environment until the salinity is 30 ‰. Guppy fish males have a body size 5 cm, colour schemes the body and fins are very bright and has a very economical price so as to attract the attention of Tuna (Katsuwonus pelamis).That process was done by adding 720 g of salt level each day during 14 days. In the first day, 65 Guppy fishes with average of weight is 1,1 gram and total length is 2,5 cm was added in the water. During 8 days (salinity 18 ‰), Guppy fish can adjust itself with the environmental, however after 8 days mortality rate of the fish is 0,02% - 0,05%. Until the end of the research, the mortality rate is 0,13% (9 fishes). Fish test results conducted in the waters of  Pramuka Island, thousand islands, showed fish can swim well and always be in the surface waters without sight change  very significant.
THE EN INFLUENCE ANEMONE (Heteractis magnifica) AGAINTS VITALITY FISH CLOWN (Amphiprion oscellaris) TO MINIMIZE THE USE OF LIVING CORAL IN THE ARTIFICIAL SEA AQUARIUM Lubis, Muhammad Zainuddin; Pujiyati, Sri; Mujahid, Muhammad
JURNAL TEKNOLOGI PERIKANAN DAN KELAUTAN Vol 4, No 2 (2013): November 2013
Publisher : Fakultas Perikanan dan Ilmu Kelautan

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Abstract

Sea Anemone is a close relative of corals. It is one of the marine life that is favored by lovers of sea-water ornamental Aquarium. Its body form resembling sponges with a beautiful color on her body. This sea anemone is a software belongs to the animals of animal invertebrates (spineless animals back). However, in the cultivation of fish, Clown fish which is much used living coral. The use of excess numbers of Anemone coral reef ecosystems in a dwindling and threatened to extinction. The results of this research show that the vitality of the living surroundings Amphiprion oscellaris aquariums made by an ideal aquatic environment conditions is not affected by symbiosis with Heteractis magnefica. Amphiprion oscellaris fish maintenance doesnt need sea anemone to survive, so the use of sea anemone can be minimised and replacing with artificial Anemone akuaskap as a decoration.
THE RELATION BETWEEN SEA BOTTOM TYPE AND DEMERSAL FISH IN PANGKAJENE WATERS SOUTH SULAWESI 2011 Akbar, Hidayanto; Pujiyati, Sri; Natsir, M
JURNAL TEKNOLOGI PERIKANAN DAN KELAUTAN Vol 4, No 1 (2013): Mei 2013
Publisher : Fakultas Perikanan dan Ilmu Kelautan

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Abstract

The bottom on benthic substrate type of waters affect the distribution of demersal fish species. Type of the substrate in waters Pangkajene South Sulawesi dominated by muddy sand. The highest distribution of demersal fish was found in the depth of 10.45 m until 15.25 m with substrate muddy sand, demersal fish was the family of kakap or jenaha (Lutjanidae ). Fish demersal in waters Pangkajene more influenced by the depth of waters than type of the substrate on the waters.
SEBARAN SPASIAL VOLUME BACKSCATTERING STRENGTH IKAN PELAGIS DI DANAU RANAU, SUMATERA SELATAN Aisyah, Aisyah; Hestirianoto, Totok; Pujiyati, Sri
Jurnal Teknologi Perikanan dan Kelautan Vol 6, No 1 (2015): MEI 2015
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24319/jtpk.6.11-20

Abstract

Danau Ranau tergolong danau besar sehingga dapat dikatakan memiliki potensi yang besar untuk dimanfaatkan sebagai penyedia air minum, perikanan, irigasi, transportasi dan rekreasi. Sv sebagai bagian dari karakteristik hidroakustik, merupakan parameter acuan dalam mengkaji atau mengkuantifikasi sumberdaya ikan pelagis (densitas, dan sebarannya). Penelitian bertujuan mengkuantifikasi hasil dari penggunaan metode akustik yang diterapkan di Danau Ranau. Data kuantitatif yang diperoleh diharapkan menjadi dasar analisis selanjutnya dalam hal pengelolaan sumberdaya perikanan di Danau Ranau, Sumatera Selatan. Penelitian dilaksanakan di Danau Ranau yang meliputi wilayah OKU Selatan dan Lampung Barat, pada Bulan November 2012 dan Februari 2013. Penelitian menggunakan perangkat akustik split beam echosounder Simrad EY60 frekuensi 120 kHz. Data hasil tangkapan yang didaratkan di Pangkalan Pendaratan ikan di wilayah OKU Selatan yang didominasi oleh ikan pelagis digunakan untuk memverifikasi data akustik. Sebaran ikan berdasarkan nilai volume backscattering strength (Sv) menunjukan penyebaran yang tidak merata. secara spasial, kelompok ikan menyebar di sisi litoral danau, hampir tidak ditemukan di sisi barat laut. Kelompok ukuran kecil ditemukan di barat daya dan selatan danau, sementara kelompok ukuran besar terkonsentrasi di tenggara dan timur. Sebaran secara vertical menunjukan bahwa ukuran dari semua kelompok target (kecil hingga besar) ditemukan di kedalaman 0-75 m, sementara di kedalaman 75-125 m ditemukan ukuran yang relative lebih besar. Suhu dan DO menunjukan bahwa terjadi stratifikasi minor di perairan ini. Koefisien korelasi menunjukan keeratan hubungan antara Sv dengan suhu (0.94), namun tidak demikian dengan Sv dan DO (0.56)
Bioacoustic Spectral Whistle Sound And Behaviour Of Male Dolphin Bottle Nose ( Tursiops aduncus) At Safari Park Indonesia, Cisarua Bogor Lubis, Muhamad Zainuddin; Pujiyati, Sri; Hestirianoto, Totok
Waste Technology Vol 4, No 1 (2016)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12777/wastech.4.1.24-30

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Whistle sound is generally used for echolocation purposes, while the sound of the blast-beat and whistles play a major role in internal and inter-group communication.The purpose of this research is to know the power spectral patterns and fluctuations in sound based on frequency and Power Spectral Density (PSD) of the sounds produced by dolphins and observing the position of dolphins , Noisy Time Domain (NTD) and behavior using underwater camera, and also comparing between time and sound spectrum. Data recording was taken at tha Safari Park of Cisarua Bogor in Indonesia, by taking data in show pool and show pool. The results showed that salinity before feeding time in the show pool with replication 1,2, and 3 has salinity value that is equal to 30 ‰. Data at the show pool before feeding with replications 1,2, and 3 has a salinity of 29 ‰. Power Spectral Density (PSD) of the whistle sound before feeding was different from one another, but it has the same frequency range. The highest intensity values is at sound whistle 3 before feeding time at the show pool with an intensity value of 28.03 dB with frequency interval of 14 642 Hz-16000 Hz. F-test at the show pool before meals has heterogeneous value. Treat before meals at the show pool has a value of P <0.001 and P <0.001. Value Noisy Time Domain have differences with each other and have a lot of different sound patterns. In general, there are real differences are evidenced by F test on a range of time at each whistle on physiotherapy and swimming pool show in the time before meals. The position of dolphins in a pool show more dominant and often in the bottom of the pool, the position of the dolphins affect the frequency.
Pemrosesan Sinyal Data Sub-bottom Profiler Substrat Dasar Perairan Selat Lembeh Solikin, Steven; Manik, Henry M.; Pujiyati, Sri; Susilohadi, Susilohadi
Jurnal Rekayasa Elektrika Vol 13, No 1 (2017)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v13i1.6060

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An accurate mapping of ocean seabed is needed to answer the challenges faced by the marine scientist today. Sub-bottom profiler present as one of the acoustics system which used to describe the sediment layer profile of the ocean bottom, as well as the thickness of the layer and the stratigraphy. The purpose of this research is to describe the 2D profile and to determine the value of the reflection coefficient of the sediment layers in Lembeh Strait, North Sulawesi. The reflection coefficient is necessary to be analyzed related to the seabed sediment grain size and type. The data acquisition carried out using Syqwest Stratabox sub-bottom profiler with the frequency of 10 kHz. FFT signal processing and bandpass filter are applied to relieve noise from main signals as well as to get better results. The results of data processing show that seafloor sediments have a value of the surface reflection coefficients which ranged between 0.1168 until 0.7938 with type iron smooth sand.
Review: Marine Seismic And Side-Scan Sonar Investigations For Seabed Identification With Sonar System Lubis, Muhammad Zainuddin; Anggraini, Kasih; Kausarian, Husnul; Pujiyati, Sri
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (985.957 KB) | DOI: 10.24273/jgeet.2017.2.2.253

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Marine seismic reflection data have been collected for decades and since the mid-to late- 1980s much of this data is positioned relatively accurately. Marine geophysical acquisition of data is a very expensive process with the rates regularly ship through dozens of thousands of euros per day. Acquisition of seismic profiles has the position is determined by a DGPS system and navigation is performed by Hypack and Maxview software that also gives all the offsets for the equipment employed in the survey. Examples of some projects will be described in terms of the project goals and the geophysical equipment selected for each survey and specific geophysical systems according to with the scope of work. For amplitude side scan sonar image, and in the multi-frequency system, color, becoming a significant properties of the sea floor, the effect of which is a bully needs to be fixed. The main confounding effect is due to absorption of water; geometric spread; shape beam sonar function (combined transmit-receive sonar beam intensity as a function of tilt angle obtained in this sonar reference frame); sonar vehicle roll; form and function of the seabed backscatter (proportion incident on the seabed backscattered signal to sonar as a function of the angle of incidence relative to the sea floor); and the slope of the seabed. The different angles of view are generated by the translation of the sonar, because of the discrete steps involved by the sequential pings, the angular sampling of the bottom.
INTEGRASI DATA MULTIBEAM BATIMETRI DAN MOSAIK BACKSCATTER UNTUK KLASIFIKASI TIPE SEDIMEN Adi, Anang Prasetia; Manik, Henry M; Pujiyati, Sri
Jurnal Teknologi Perikanan dan Kelautan Vol 7, No 1 (2016): MEI 2016
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24319/jtpk.7.77-84

Abstract

Sistem multibeam echosounder tidak hanya memperoleh presisi tinggi dalam pengolahan data batimetri saja, tetapi juga mendapatkan resolusi tinggi dalam data backscatter strenght (BS) dasar perairan. Sejumlah penelitian telah menerapkan metode akustik untuk mengklasifikasikan tipe sedimen dasar perairan dengan menggunakan data backscatter, dan hasil klasifikasi yang diperoleh lebih baik daripada sampling sedimen secara tradisional. Tujuan penelitian ini untuk mengintegrasikan hasil data multibeam echosounder dalam penentuan batimetri dan pengklasifikasian tipe sedimen dasar perairan.Penelitian menggunakan data survei batimetri multibeam echosounder Kongsbergs EM 2040C di Sungai Kapuas Pontianak, Kalimantan Barat. Penentuan batimetri menggunakan metode Combined Uncertainty and Bathymetry Estimator (CUBE), sedangkan klasifikasi tipe sedimen menggunakan metode Angular Response (ARA) dan Sediment Analysis (SAT) yang semuanya tertanam dalam software Caris Hips and Ships versi 9.0. Hasil klasifikasi tipe sedimen secara unsupervised terdapat empat tipe sedimen. Nilai intensitas tipe sedimen kerikil (gravel) berkisar antara -16 dB hingga -13 dB, pasir (sand) berkisar antara -22 dB hingga -17 dB, lumpur (silt) antara -26 dB hingga -23 dB dan lempung (clay) berkisar antara -34 dB hingga -29 dB.
AKUSTIK DIBANDINGKAN DENGAN DENSITAS IKAN: KOMBINASI METODE AKTIF DAN PASIF Randi, Zulfathri; Hestirianoto, Totok; Pujiyati, Sri
Jurnal Teknologi Perikanan dan Kelautan Vol 8, No 2 (2017): NOVEMBER 2017
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (758.132 KB) | DOI: 10.24319/jtpk.8.187-198

Abstract

Akustik perikanan memiliki dua pembagian utama yaitu akustik aktif dan pasif. Berbagai penelitian akustik dengan metode aktif telah dilakukan untuk mengkaji hubungan antara akustik dengan densitas ikan, namun kombinasi metode aktif dengan pasif belum pernah dilakukan sekaligus pada kawanan ikan yang sama. Mengkombinasikan kedua metode ini diharapkan dapat menghasilkan informasi yang berhubungan dengan densitas ikan serta kecenderungannya baik dengan metode aktif maupun pasif. Penelitian ini dilakukan pada kawanan ikan nila (Oreochromis niloticus) dalam kondisi terkontrol berjumlah 50, 100, dan 150 individu ikan dengan kisaran panjang total 10-13cm. Akuisisi data akustik aktif dan pasif dilakukan secara stasioner selama 15 menit pada keramba jaring apung (KJA) ukuran 2 m×2 m×1.8 m menggunakan echosounder CruzPro PcFF-80 frekuensi 200 kHz (akustik aktif) dan hydrophone Dolphin EAR 100 (akustik pasif). Data akustik aktif diolah menggunakan program Matlab R2013b untuk menghasilkan nilai hambur balik volume (scattering volume, SV), sedangkan data akustik pasif diolah menggunakan program Wavelab untuk memperoleh nilai intensitas suara dalam domain frekuensi, selanjutnya keduanya dihubungkan dengan densitas ikan. Hasil pengukuran SV pada ikan berjumlah 50, 100 dan 150 individu secara berturut-turut adalah -45.898 dB, -45.887 dB dan -45.888 dB, dengan koefisien determinasi (R2) mencapai 0.6583. Terdapat penurunan rata-rata SV pada ikan berjumlah 150 individu yang diduga terjadi karena adanya efek shadowing, juga akibat ikan yang digunakan berukuran kecil. Intensitas suara tertinggi dan terendah ikan berjumlah 50 individu pada rentang frekuensi 0-22 kHz berturut-turut sebesar -28.306 dB dan -64.582 dB, pada ikan berjumlah 100 individu, sebesar -26.0793 dB dan -64.5296 dB, pada ikan berjumlah 150 individu sebesar -28.5246 dB dan -64.5679 dB.