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All Journal JURNAL ILMIAH PLATAX Omni-Akuatika Asian Journal of Aquatic Sciences PELAGICUS: Jurnal IPTEK Terapan Perikanan dan Kelautan Nekton JILPI Jurnal Ilmiah Pengabdian dan Inovasi Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Sewiko, Roni
Politeknik Kelautan Dan Perikanan Karawang
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Social Sciences

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The Biodiversity of Gastropods In Karapyak Rocky Shores, Pangandaran Region, West Java Province, Indonesia Asep Sahidin; Zahidah Zahidah; Herman Hamdani; Indah Riyantini; Roni Sewiko
Journal Omni-Akuatika Omni-Akuatika Special Issue 2nd Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (979.057 KB) | DOI: 10.20884/1.oa.2018.14.2.547

Abstract

Pangandaran rocky shores have a unique ecosystem and a variant of invertebrate organisms such as mollusk from the gastropod class. This study aims to analyze the biodiversity of gastropods on the rocky shore of Karapyak beach. This research consists of 5 stations. The quadrant set by 1 m x 1 m vertically toward the sea. The result found 773 individuals scattered in nine families. The family of Neritidae dominated (43%), followed by family cyprinoids with 6.3%. Nerita plicata is a species found to dominate in every station with an average abundance (256 ± 10) and/m2. Using the Bray-Curtis cluster analysis, showed variations in the distribution and abundance of different gastropods vertically into the ocean and uniformly distributed horizontally to the shore. Substrate and tidal are the main variables in the spatial distribution of gastropods in the Karapyak beach.
Percepatan Pembuatan Garam Dengan Metode Sprinkle Bertingkat Aris Kabul Pranoto; Anthon Anthonny Djari; Roni Sewiko; Larasati Putri Hapsari; Haryanto Haryanto; Chairil Anwar
PELAGICUS Volume 1 Nomor 3 September 2020
Publisher : Politeknik Kelautan dan Perikanan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/plgc.v1i3.8882

Abstract

Pada umumnya pembuatan garam secara tradisional menggunakan teknologi evaporasi air laut   memerlukan waktu 20 hari per panen garam, sedangkan dengan metode Maduresse Berisolator memerlukan waktu 12 hari per panen garam. Tujuan penelitian ini adalah untuk melakukan inovasi teknologi evaporasi air laut dengan uji coba aplikasi teknologi tepat guna dalam percepatan pembuatan garam dengan Metode Sprinkle Bertingkat. Penelitian ini dilakukan selama 3 bulan mulai bulan Agustus sampai dengan bulan Oktober 2019 sebanyak 30 kali ulangan dan menghasilkan data rata – rata 3 oBe menjadi 9,78 oBe per hari.  Hasil penelitian ini dengan Metode Sprinkle Bertingkat dalam waktu 6 hari menghasilkan kristal garam atau lebih cepat 6 hari per panen, jika dibandingkan dengan Metode Maduresse Berisolator. Percepatan pembuatan garam ini terjadi karena adanya inovasi teknologi dengan menambahkan alat berupa sprinkle yang berfungsi menyemprotkan air laut ke udara sehingga mempercepat terlepasnya H2O dari air laut dan mempercepat terbentuknya kristal garam. Dengan demikian dapat disimpulkan bahwa Metode Sprinkle Bertingkat dapat diterapkan untuk mempercepat terbentuknya kristal garam, sehingga metode ini direkomendasikan sebagai inovasi teknologi dalam meningkatkan produksi garam.
Identifikasi Spesies Mangrove dengan Menggunakan Sistem Pesawat Udara Kecil Tanpa Awak di Kawasan Ekosistem Mangrove Sedari, Kabupaten Karawang, Jawa Barat Roni Sewiko; Herlina Adelina Meria Uli Sagala; Yulandhita Yulandhita; Chrisoetanto P. Pattirane
Nekton Vol 2 No 2 (2022): October
Publisher : Pusat Penelitian dan Pengabdian Pada Masyarakat (PPPM) Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1888.493 KB) | DOI: 10.47767/nekton.v2i2.397

Abstract

Remote sensing is one of the effective methods of monitoring mangrove ecosystems. One of the challenges in implementing this method is image resolution. Access to large-resolution imagery as a basic material for spatial analysis is not cheap. Unmanned small aircraft systems (SPUKTA) or drones are able to answer these challenges. Orthophotos obtained from the acquisition of drones are capable of producing large-resolution imagery. This method is then implemented in conservation areas, to facilitate the process of identifying mangrove species in the area. The drone was flown at an altitude of 150 m with a pavement value of 85% for 4 flying missions. The result of processing 1614 aerial photos into orthophotos produced images with a GSD resolution of 4.75 cm/pix. These images are then analyzed with on-screen digitization techniques and visual interpretation. From the total area of the study area of 46.48 ha obtained the digitization results of Rhizophora sp. with a total area of 24.68 ha, Avicennia sp. 7.64 ha, dead mangroves 0.19 ha, and non-vegetation 13.97 ha.
MAPPING THE DISTRIBUTION OF MANGROVE BY REMOTE SENSING IN THE COASTAL OF KARAWANG REGENCY Roberto Patar Pasaribu; Aris Kabul Pranoto; Roni Sewiko; Elfa Afwafiah
Asian Journal of Aquatic Sciences Vol 5 No 2 (2022): August 2022
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.5.2.160-168

Abstract

Mangroves are forest vegetation that grows between tidal lines so that mangrove forests are also called tidal forests. Mangrove ecosystems have high biodiversity. The mangrove ecosystem has a physical function to protect the coast from abrasion and erosion, this ecosystem also has ecological and economic value. The purpose of this study was to determine the condition and extent of mangrove distribution on the coast of Karawang Regency. The research was carried out on the coast of Karawang Regency from March to June 2021. The data used is primary data by directly observing the research location and secondary data using remote sensing data from the Landsat 8 satellite. Image data processing and analysis is carried out using the NDVI (Normalized Difference Vegetation Index) method which can create a boundary between mangrove and non-mangrove. With this method, it can be seen the changes in the mangrove distribution area from year to year. The results of data processing and analysis show that in 2013 the distribution of mangroves on the coast of Karawang Regency has an area of ​​207.88 km2, in 2016 it has an area of ​​357.22 km2 and in 2020 its area is 237.61 km2.
GROWTH RATE OF Nannochloropsis sp ACCORDING TO ADDITING CONCENTRATION OF ZINC (ZN) AND COOPER (CU) Herlina Adelina Meria Uli Sagala; Chrisoetanto P Pattirane; Roni Sewiko; Ully Wulandari; Beta Indi Sulistyowati
Asian Journal of Aquatic Sciences Vol 5 No 3 (2022): December
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.5.3.315-321

Abstract

Zinc and copper are micronutrients that are the factors that support microalgae growth rate besides macronutrients, CO2, temperature, salinity, and pH. Growth of Nannochlopsis sp was observed to determine the influence of the addition of Zn and Cu concentration. Microalgae cultivation was located outdoors on the semi-mass scale using 800 L medium on mesophilic condition in 3 treatments with the addition of 1 ppm, 3 ppm, and 5 ppm concentrations of Zn and Cu metals. Cell density was calculated using a hemocytometer, assays the absorbed metal content was measured by AAS. The study aimed to test the growth response of Nannochloropsis sp cells to Zn and Cu metals. The growth rate of microalgae was observed for the addition of Zn and Cu concentration in the cultivation medium. The result showed the highest Nannochloropsis sp growth rate for Zn addition was 0.053/day and for Cu addition was 0.279/day. Between Zn and Cu addition, the highest growth rate was observed in the addition of 1 ppm Cu metal (Cu1) which was equal to 0.279/day. This shows that adding micronutrients are not automatically will increase the growth rate of microalgae as well.
THE USE OF DRONE AND VISIBLE ATMOSPHERICALLY RESISTANT INDEX (VARI) ALGORITHM IMPLEMENTATION IN MANGROVE ECOSYSTEM HEALTH’S MONITORING Roni Sewiko; Herlina Adelina Meria Uli Sagala
Asian Journal of Aquatic Sciences Vol 5 No 3 (2022): December
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.5.3.322-329

Abstract

Operational limitations are the main problem in monitoring 3.31 million hectares of mangrove forest areas throughout Indonesia. However, with the disruption of technology, there are currently many approaches and methods that can be adapted to answer these problems. One of them is drone technology. This technology can be utilized in high-resolution rapid mapping for limited areas. The output from the data acquired by the drone can be analyzed for various purposes, including assessing the health condition of the vegetation. In this study, the results of the acquisition of unmanned aircraft on mangrove vegetation are used to determine the health level of vegetation in mangrove conservation areas. The research was conducted on 46 hectares of the mangrove conservation area. The acquisition process was divided into four flying missions with a flight height of 150 m, 80% patching, and using the Hasselblad L1D-20c camera with a 1-inch sensor. The acquisition results are processed using the online photogrammetry method through the cloud-based photogrammetry service from DroneDeploy. Processing uses standard mode, where this mode is designed to produce good image quality with a relatively fast processing time. The acquisition results of 1614 photos were 100% successfully aligned, with 3.50 cm/px GSD resolution. Based on the application of the VARI algorithm to the resulting orthophoto, it is known that 30.2692% of the AOI is an area and/or dead or non-vegetated vegetation. Then 59.3887% is vegetation in an unhealthy condition, 10.3405% is considered as vegetation in a healthy condition, and 0.0015% is vegetation in a very healthy condition
Sosialisasi Teknologi Desalinasi Sederhana di Pesisir Kabupaten Karawang Roni Sewiko; Herlina Adelina Meria Uli Sagala; Aris Kabul; Roberto Patar Pasaribu
JILPI : Jurnal Ilmiah Pengabdian dan Inovasi Vol. 1 No. 2 (2022): Desember
Publisher : Insan Kreasi Media

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2684.288 KB)

Abstract

Provision of clean water for the community is still a big problem in Indonesia. To overcome this, it is necessary to make an alternative efforts to obtain water that is suitable for use. This community service activity aims to introduce a simple technology to obtain useable water by applying simple desalination technology. This activity was carried out by the Department of Marine Engineering, Karawang Marine and Fisheries Polytechnic. This program has been carried out in Tambak Sari Village, Tirtajaya District, Karawang Regency, West Java. The method is carried out by counseling and direct demonstrations in the field. The community service program planned by the lecturers of the Marine Engineering Study Program, KP Karawang Polytechnic can be carried out well. This happened because of good cooperation and supported by the Director of Polytechnic, the Head of Tambak Sari Village and the surrounding stakeholders and Community Groups.
Utilization of Remote Sensing Images for Compiling The Characteristics Map of Indramayu Beach, West Java Arifah Fadhilah Adjisuci; Roni Sewiko; Sonny Mawardi; Anasri Anasri
PELAGICUS Volume 3 Nomor 3 Tahun 2022
Publisher : Politeknik Kelautan dan Perikanan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/plgc.v3i3.10120

Abstract

The beach has an important role in the development and economy of a region. Therefore, it is important to understand the condition and characteristics of the coast so that it can be managed and developed wisely. One way to understand the condition of the beach is through making a map of the characteristics of the beach. A coastal characteristic map is a graphical representation of the conditions and characteristics of the geology, geography, and hydrology of a coast. Making a coastal characteristic map with remote sensing requires several steps, namely: 1). satellite data collection: Pre-processing satellite data; 2). classification of satellite data; 3). satellite data analysis; and finally 4). making a coastal characteristic map. The area that is the fabric material is the beach of Indramayu Regency, West Java. Based on the analysis and interpretation of 2015 Landsat 8 (LDCM) image data, 2020 Sentinel 2 Image data, BATNAS, and DEMNAS data, it is known that the characteristics of the Indramayu beach are that it has geo-quaternary building materials which include: (a) coastal bunds, ( b) swamp deposits, (c) shallow marine deposits, (d) sand deposits, (e) flood plains, (f) river deposits, and (g) floodplain deposits. The morphology includes: (a) beach sand plains, (b) concave coastal swamps, (c) old beach bunds, (d) young beach bunds, (e) alluvial plains, (f) flood plains, and (g) fan plains delta. Finally, it has a distribution of surface sediments on the seabed which includes: (a) sand, (b) silt, gravelly sand, (d) slightly gravelly silt, (e) slightly gravelly sandy mud, and (f) gravelly mud.
Assessment of water quality based on biological indices of macrobenthos: a river under pressure from tourism activities Asep Sahidin; Zahidah Zahidah; Herman Hamdani; Heti Herawati; Mochamad Candra Wirawan Arief; M. Suhaemi Syawal; Aiman Ibrahim; Roni Sewiko; Chitra Octavina
Depik Vol 10, No 3 (2021): December 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1095.273 KB) | DOI: 10.13170/depik.10.3.22838

Abstract

Cijulang River is one of the leading ecotourism objects in Pangandaran, West Java Province, Indonesia. However, the river has a variety of activities that can increase the water pollution in the river such as Green Canyon cliffs tourism, ecotourism of mangrove conservation, housing, and industrial siting. Macrobenthos is one of the bio-indicators that can assess the rate of water pollution in rivers, especially their organic pollutants. Therefore, this research aims to determine water pollution status in Cijulang River Tourism by comparing various biotic indices. The study was conducted at four site sampling locations from upstream to downstream in the rainy season period and dry season period using different methods namely, line transect model, water quality assessment by biological indexing (diversity, species dominant, and family biotic), species deficit, and organic measurement. The research showed 5873 macrobenthos and divided into 27 species with an average abundance of 167 ind.m-2 and are mainly dominated by gastropod species Faunus ater (40%). They are extreme species that can live in high organic pollution and water salinity. This divided the research of quality water assessment of Cijulang River into three categories as follows: slightly polluted (score 36-46) at Green Canyon site, moderately polluted (score 50-60) at Boat Shelter and Muara Cijulang location, and highly polluted (score 66) at Nusawiru site.Keywords:RiverBio-indicatorOrganicAquatic pollution
Application of The Admiralty Method to Process Tidal Data in the Waters of The Nasik Strait - Bangka Belitung Roberto Patar Pasaribu; Roni Sewiko; Arifin Arifin
Jurnal Ilmiah PLATAX Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.39719

Abstract

Tides are the rise and fall of sea level caused by the attraction of objects in the sky, especially the moon and sun, to the mass of seawater on earth. Tidal research is useful for providing information about the components and types of tides and predicting tides and for mitigating natural disasters. Tidal measurements were carried out in the Nasik Strait, Bangka Belitung using the Valeport 106 tool. Tidal data was processed using the Admiralty Method. The Admiralty method is a method used to calculate tidal harmonic constants from observations of water levels. With this method, it is possible to know the amplitude and phase difference of the tides, the value of the Formzahl number, and the type of tide. From the results of data processing and analysis, the value of the Formzahl number in the waters of the Nasik Strait is 11,454 and the tidal type is a single daily tidal type that only occurs at one high tide and one low tide in one day.Keywords: tides; tidal types; admiralty method; formzahl numberAbstrakPasang surut adalah naik turunnya muka air laut yang disebabkan oleh gaya tarik benda-benda di langit, terutama bulan dan matahari terhadap massa air laut yang ada di bumi. Penelitian pasang surut bermanfaat untuk memberikan informasi mengenai komponen dan tipe pasang surut serta  memprediksi pasang surut serta untuk mitigasi bencana alam. Pengukuran pasang surut dilakukan di Perairan Selat Nasik, Bangka Belitung dengan menggunakan alat Valeport 106. Data pasang surut diolah dengan menggunakan Metode Admiralty. Metoda Admiralty merupakan metode yang digunakan menghitung konstanta harmonik pasang surut dari pengamatan ketinggian air. Dengan metoda ini dapat diketahui  amplitudo dan beda fase pasang surut, nilai bilangan Formzahl dan tipe pasang surutnya. Dari hasil pengolahan dan analisa data diperoleh nilai bilangan Formzahl di perairan Selat Nasik yaitu 11,454 dan tipe pasang surut adalah tipe pasang surut harian tunggal yang hanya terjadi satu kali pasang dan satu kali surut dalam satu hari.Kata Kunci: pasang surut; tipe pasang surut; metode admiralty; bilangan formzahl
Co-Authors Aiman Ibrahim Anasri Tanjung Arifah Fadhilah Adjisuci Arifin Arifin Aris Kabul Aris Kabul Pranoto Asep Sahidin Asep Sahidin Chairil Anwar Chitra Octavina Chrisoetanto P Pattirane Chrisoetanto P. Pattirane Djari, Anthon Anthonny Elfa Afwafiah Hapsari, Larasati Putri Haryanto Haryanto Herlina Adelina Meria Uli Sagala Herman Hamdani Herman Hamdani Heti Herawati Indah Riyantini M. Suhaemi Syawal Mochamad Candra Wirawan Arief Pasaribu, Roberto Patar Sonny Mawardi Sulistyowati, Beta Indi Ully Wulandari Yulandhita Yulandhita Zahidah - Zahidah Zahidah