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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences Maspari Journal Jurnal Kelautan Tropis Journal of Applied Geospatial Information Techne : Jurnal Ilmiah Elektroteknika Marine Research in Indonesia
Dwi Eny Djoko Setyono, Dwi Eny Djoko
UPT-Loka Pengembangan Bio Industri Laut Mataram
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Physics

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REARING OF JUVENILE DONKEY-EAR ABALONE (Haliotis asinina) IN FLOW-THROUGH TANKS WITH THE ADDITION OF DIFFERENT SUBSTRATES Setyono, Dwi Eny Djoko
Marine Research in Indonesia Vol 40, No 1 (2015)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (922.173 KB) | DOI: 10.14203/mri.v40i1.70

Abstract

This study investigated the effects of the addition of coral rubble and polyvinylchloride (PVC) guttering as substrates on the growth of donkey-ear abalone (Haliotis asinina) reared in a flow-through water system. The tanks were100 cm long x 50 cm wide x 40 cm deep, filled with sea water up to 30 cm high. Hatchery-produced abalone with a mean initial shell length of 30.9 ± 0.1 mm and wet weight of 5.5 ± 0.1 g were stocked at 25 individuals/tankthat corresponded to stocking densities of ca. 50 abalone/m2 of the bottom area of the tank. Juvenile abalonewere provided with an excess red seaweed Gracilaria spp daily over 175 days. The results show that growth and growth rates in shell length and wet body weight were not significantly different between treatments (P>0.05). Survival rates of juveniles reared in the tank with the addition of coral rubble and/or PVC guttering were 100%, but 98% for juveniles in the tank without the addition of substrate. The average daily growth rates of shell length and wet body weight were 0.087+0.037 mm and 0.088+0.044 g for juveniles reared in the tank with the addition of coral rubble; 0.081+0.030 mm and 0.077+0.032 g for juveniles reared in the tank with the addition of PVC guttering; and 0.082+0.032 mm and 0.078+0.039 g for juveniles reared in tank without addition of substrates.
ONGROWING TECHNIQUES FOR JUVENILE DONKEY EAR ABALONE (HALIOTIS ASINIA) AT PEMENANG WATERS, NORTH LOMBOK, INDONESIA Setyono, Dwi Eny Djoko; Aswandy, Indra
Marine Research in Indonesia Vol 35, No 2 (2010)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9809.766 KB) | DOI: 10.14203/mri.v35i2.473

Abstract

Abalone is one of the most prized sea delicacies in the world. In Indonesia, although donkey ear abalone (Haliotis asinina) forms a valuable fishery, little is known about its culture techniques. A study has been conducted to find out the most suitable technique for ongrowing donkey ear abalone, for to the local farmer in Indonesia. Juveniles used in study were collected from the southern Lombok coastal waters. They were reared in different type of structure (CNC = circular net cage and TNC = tyre net cage) and set at different depths. Juveniles were fed ad-libitum by macroalgae, Gracilaria spp. Results of the study showed that juveniles of donkey ear abalone have a better growth when cultured offshore in a TNC than in CNC. To gain a better growth, juveniles abalone need to be reared in cages which provided more shelter and less light. Donkey ear abalone was considered a hardy species, survival rate was not influenced by the type of structure (CNC or TNC) and setting position (depths).
ONGROWING TECHNIQUES FOR JUVENILE DONKEY EAR ABALONE (HALIOTIS ASINIA) AT PEMENANG WATERS, NORTH LOMBOK, INDONESIA Setyono, Dwi Eny Djoko; Aswandy, Indra
Marine Research in Indonesia Vol 35 No 2 (2010)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9809.766 KB) | DOI: 10.14203/mri.v35i2.473

Abstract

Abalone is one of the most prized sea delicacies in the world. In Indonesia, although donkey ear abalone (Haliotis asinina) forms a valuable fishery, little is known about its culture techniques. A study has been conducted to find out the most suitable technique for ongrowing donkey ear abalone, for to the local farmer in Indonesia. Juveniles used in study were collected from the southern Lombok coastal waters. They were reared in different type of structure (CNC = circular net cage and TNC = tyre net cage) and set at different depths. Juveniles were fed ad-libitum by macroalgae, Gracilaria spp. Results of the study showed that juveniles of donkey ear abalone have a better growth when cultured offshore in a TNC than in CNC. To gain a better growth, juveniles abalone need to be reared in cages which provided more shelter and less light. Donkey ear abalone was considered a hardy species, survival rate was not influenced by the type of structure (CNC or TNC) and setting position (depths).
COMMUNITY STRUCTURE OF GASTROPOD IN THE WATUKARUNG VILLAGE INTERTIDAL ZONE, DISTRICT OF PACITAN, EAST JAVA, INDONESIA Setyono, Dwi Eny Djoko; Kusuma, Hollanda Arief; Poeteri, Nandike Ayudiah; Bengen, Dietrich G; Kurniawan, Ferry
Marine Research in Indonesia Vol 44 No 1 (2019)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Gastropod is a class of snail with the biggest number of species from the mollusk phylum, since it is able to adapt with any type of habitat. Watukarung Village, which has unique characteristic of its rocky beaches and sand dunes, is one of many habitats of gastropods in the intertidal zone. Thus, a basic information on the structure of the gastropods community in the area is required. Research was conducted in August 2014 in Ngalorombo Beach, Pasir Putih Beach, and Kasap Beach. Systematic sampling was applied using the quadratic plot of 1 x 1 m2, while data analyses comprised of density, Shannon-Wiener index, Eveness index, Simpson index, and correspondence analysis. The gastropods were found in studied areas consist of 8 families, 9 genera, and 13 species. The highest density and the most diverse of the category were in Kasap Beach. Eveness index and Simpson index of the species in the three beaches were in the low category. There was a tendency of the gastropods to live in the habitat made up of coarse sand and stones with good water quality, as shown in the result of the correspondence’s analysis.
REARING OF JUVENILE DONKEY-EAR ABALONE (Haliotis asinina) IN FLOW-THROUGH TANKS WITH THE ADDITION OF DIFFERENT SUBSTRATES Setyono, Dwi Eny Djoko
Marine Research in Indonesia Vol 40 No 1 (2015)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (922.173 KB) | DOI: 10.14203/mri.v40i1.70

Abstract

This study investigated the effects of the addition of coral rubble and polyvinylchloride (PVC) guttering as substrates on the growth of donkey-ear abalone (Haliotis asinina) reared in a flow-through water system. The tanks were100 cm long x 50 cm wide x 40 cm deep, filled with sea water up to 30 cm high. Hatchery-produced abalone with a mean initial shell length of 30.9 ± 0.1 mm and wet weight of 5.5 ± 0.1 g were stocked at 25 individuals/tankthat corresponded to stocking densities of ca. 50 abalone/m2 of the bottom area of the tank. Juvenile abalonewere provided with an excess red seaweed Gracilaria spp daily over 175 days. The results show that growth and growth rates in shell length and wet body weight were not significantly different between treatments (P>0.05). Survival rates of juveniles reared in the tank with the addition of coral rubble and/or PVC guttering were 100%, but 98% for juveniles in the tank without the addition of substrate. The average daily growth rates of shell length and wet body weight were 0.087+0.037 mm and 0.088+0.044 g for juveniles reared in the tank with the addition of coral rubble; 0.081+0.030 mm and 0.077+0.032 g for juveniles reared in the tank with the addition of PVC guttering; and 0.082+0.032 mm and 0.078+0.039 g for juveniles reared in tank without addition of substrates.
STUDI PERTUMBUHAN ABALON TROPIS (Haliotis asinina) DENGAN PEMBERIAN PAKAN BUATAN YANG BERBEDA Sinaga, Dedi Saputra; ., Melki; Setyono, Dwi Eny Djoko
Maspari Journal : Marine Science Research Vol 7, No 1 (2015): Edisi Januari
Publisher : UNIVERSITAS SRIWIJAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (806.054 KB) | DOI: 10.36706/maspari.v7i1.2489

Abstract

Abalon merupakan siput atau gastropoda laut yang bersifat herbivora. Permintaan dunia akan abalon di Indonesia terus meningkat sehingga membahayakan populasi abalon di Indonesia, karena produk abalon di Indonesia sampai saat ini utamanya masih dari hasil tangkapan di alam. Tujuannya penelitian ini adalah untuk mempelajari pertumbuhan abalon tropis (Haliotis asinina) yang dilakukan dengan pemberian pakan buatan dengan komposisi perbandingan sumber protein yang berbeda serta mengetahui komposisi pakan buatan yang mampu meningkatkan pertumbuhan abalon tropis (Haliotis asinina) yang paling baik. Penelitian ini mengenai studi pertumbuhan abalon dengan pemberian pakan buatan yang berbeda yang dilaksanakan di UPT Loka Pengembangan Bio Industri Laut, LIPI Mataram pada bulan Juli-Oktober 2013 dengan metode RAK (Rancang Acak Kelompok). Anakan abalon yang digunakan dengan ukuran rata-rata panjang cangkang ± 25 mm dan berat ± 2 gram. Pengukuran dilakukan panjang dan berat abalon dilakukan tiap 2 minggu (dwiminggu) selama 84 hari dengan 4 perlakuan dan 3 ulangan yakni : Abalon tropis (Haliotis asinina) yang diberi pakan rumput laut (Gracillaria sp) sebagai kontrol, formulasi pakan A (100% tepung udang), formulasi pakan B (50% tepung udang : 50% tepung ikan) dan formulasi pakan C (100% tepung ikan). Hasil yang diperoleh pertumbuhan panjang cangkang terbaik didapatkan pada pakan B sebesar 3,92 mm. Pertumbuhan berat abalon adalah dengan pemberian pakan A 3,22 gr. Komposisi pakan buatan yang paling baik adalah pakan A dengan komposisi sumber protein 100% tepung udang.KATA KUNCI: Abalon, pakan buatan, pertumbuhan.
Buoy Observasi Data Parameter Oseanografi Dan Meteorologi di Perairan Terumbu Karang : Desain dan Implementasi Kusuma, Hollanda Arief; Alfahmi, Muhammad Hafiz; Suhendra, Tonny; Setyono, Dwi Eny Djoko
Techné : Jurnal Ilmiah Elektroteknika Vol. 22 No. 2 (2023)
Publisher : Fakultas Teknik Elektronika dan Komputer Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31358/techne.v22i2.363

Abstract

Dalam studi ini, pengembangan buoy observasi data oseanografi dan meteorologi dilakukan dengan menggunakan wahana bouy yang stabil dan mengambil data dengan akurasi yang baik. Sensor DS18B20 memiliki akurasi 98,82% dengan RMSE 0,54°C, sensor DHT21 memiliki akurasi 99,99% dengan RMSE 0,0013°C, dan sensor kekeruhan memiliki akurasi antara 95,92% hingga 96,76% dengan RMSE 8,7 NTU hingga 46 NTU. Konsumsi daya perangkat 1 jam sebesar 1,85 Wh. Hasil uji lapang menunjukkan variasi pola suhu udara dan permukaan air laut, tingkat kelembaban udara yang lebih tinggi pada malam hari, dan intensitas cahaya matahari yang menurun pada malam hari dengan kenaikan akibat cahaya bulan. Kekeruhan air masih sesuai baku mutu. Baterai 25,2 Wh dan solar panel 4,2 Wp digunakan sebagai pasokan daya.
Tidal Analysis and Implementasion of an Internet of Things (IoT) Sea Level Monitoring Device in Coastal Region Kusuma, Hollanda Arief; Egistian, Farista; Cintra, Allsay Kitsash Addifisyukha; Setyono, Dwi Eny Djoko
Jurnal Kelautan Tropis Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i1.21983

Abstract

Monitoring the sea level is crucial for the protection of coastal communities and infrastructure. Instruments that can record and transmit the sea level in real time are essential for preventing potential disasters. This study presents the design, construction, and evaluation of an instrument for measuring sea level using a pressure sensor, a microcontroller, and a GSM module. The sea level analyzed using T Tide analysis. The instrument's accuracy was established through a calibration process, resulting in a sensor reading accuracy of 96.76% and a low root mean square error of 3.24 cm. The linear regression model confirmed the strong correlation between sensor readings and actual water depth, with a coefficient of determination of 0.999. The instrument achieved an accuracy of 96.76% and a low root mean square error of 3.24 cm. Field testing over three days showed the instrument's reliability in measuring sea levels, with an accuracy rate of 91.93% and an root mean square error of 8.07 cm with a packet loss of 7.86%. The study area had mixed semidiurnal characteristics, with water levels ranging from 60.1 cm to 209.55 cm. Significant constituents such as principal lunar diurnal constituent (K1) and Principal lunar semidiurnal (M2) dominate the tidal patterns, each with distinct frequencies, amplitudes, and signal-to-noise ratios. This research provides a precise and cost-effective instrument for measuring water depth, which is suitable for coastal management, environmental monitoring, and scientific investigation.
Comparation Tidal Harmonic Based on IoT Instrument Using Admiralty Method in Tanjungpinang Waters Alajuri, M Hasbi Sidqi; Kusuma, Hollanda Arief; Suhendra, Tonny; Setyono, Dwi Eny Djoko
Journal of Applied Geospatial Information Vol. 8 No. 2 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i2.9042

Abstract

Tides are the rising and falling movement of sea level caused by the gravitational force of celestial bodies such as the moon and sun on the mass of seawater on earth. The aim of this research is to compare the use of time series of harmonic constant parameters obtained from tidal data stored in the tool using the admiralty method. Research activities were carried out at the international port of Dompak Island, Tanjungpinang City, Riau Islands. This tidal data is analyzed by admiralty. This method is used to analyze harmonic constants and identify patterns and sea level levels. Based on the results obtained, the type of tide in Tanjungpinang waters is a mixed tide (single dominant) with an F value of 2.01 to 2.07. The sea level elevation values "‹"‹obtained (MSL) from each time series ranged from 75.83 cm to 76.60 cm, (MHWL) ranged from 97.17 cm to 98.24 cm. Then (MLWL) ranges from 58.77 cm to 59.39 cm. Meanwhile, (HHWL) ranges from 153.98 cm to 154.73 cm, and (LLWL) ranges from -2.77 cm to -1.96 cm. With a confidence interval of 5 percent, is obtained. The difference in each time series seen from the data (MSL) is 7cm. Therefore, Tidal data from each time series has no significant differences.
Spectral Characterization in Seaweed, Kappaphycus alvarezii, using AS7285x Spectroscopy Sensor Device Kusuma, Hollanda Arief; Suhendra, Tonny; Ilhamdy, Aidil Fadli; Ilhami, Carel Candigia Sahid; Setyono, Dwi Eny Djoko; Lubis, Muhammad Zainuddin
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 2 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.2.183-191

Abstract

This study explores the spectral characterization of seaweed, Kappaphycus alvarezii, using the SparkFun Triad Spectroscopy Sensor AS7265x to assess the relationship between water content and light intensity. This research aims to provide a foundation for non-destructive monitoring of post-harvest seaweed quality using spectral techniques. The SeaSpec device was constructed using an ESP32 microcontroller, a TFT display, and the AS7265x sensor. Seaweed samples were collected from the coastal area of Karimun Islands and subjected to a controlled drying process at 40°C to determine the water content in the seaweed. The spectral data were recorded across 18 channels in the visible and infrared spectra, highlighting distinct patterns that correlate with varying moisture levels. A multiple linear regression analysis was employed to determine the contributions of individual spectral channels to water content prediction, revealing that each channel has its own unique contribution to the model. Coefficient of determination (R²), percentage error (%), and percentage accuracy (%) were also used to assess model performance. The results indicated that higher water content corresponds to increased light intensity. The analysis indicated that the visible spectrum outperformed the infrared spectrum in predictive accuracy, with an R² value of 0.79 compared to 0.61 for the infrared spectrum. This indicates that the visible light spectrum is more effective in predicting water content in K. alvarezii. The findings underscore the potential of spectral analysis as a reliable method for assessing the physico-chemical properties of seaweeds, advancing the use of optical sensors in aquaculture and environmental monitoring while paving the way for future research.
Co-Authors Alajuri, M Hasbi Sidqi Alfahmi, Muhammad Hafiz Aswandy, Indra Cintra, Allsay Kitsash Addifisyukha Dedi Saputra Sinaga, Dedi Saputra Dietrich G Bengen Egistian, Farista Ferry Kurniawan, Ferry Hollanda Arief Kusuma Ilhami, Carel Candigia Sahid Melki Melki Muhammad Zainuddin Lubis Poeteri, Nandike Ayudiah Tonny Suhendra