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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

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

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.

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

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

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

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 | DOI: 10.13170/depik.10.3.22838

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

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 | DOI: 10.13170/depik.10.3.22838

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

The Potential of Cynodon Dactylon and Lolium Perenne 'Brightstar' as Phytoremediator Agents in Dealing with the Problem of Sea Water Intrusion in the North Coastal Area of Karawang Riza Rizkiah; Roni Sewiko; Aris Kabul Pranoto; Roberto Patar Pasaribu; Anthon Anthonny Djari; Abdul Rahman; R Moh Ismail; Endy Handayani; Luciana Luciana; Muhammad Agus Mulyana
Sainteks: Jurnal Sain dan Teknik Vol 6 No 1 (2024): Maret
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i1.651

Sea water intrusion is a process where sea water is mixed with underground water around the coast, causing the ground water to become salty because it is contaminated by sea water which is rich in salt. Sea air that enters the ground causes the air to become unfit for consumption and causes the land to become unproductive for planting. People in the Pakis Jaya area, Karawang face difficulties, especially regarding land use for agricultural activities. This is because the land used for cultivating plants is saline soil with a high salt content. Phytoremediation is a method used to clean air or soil contaminated with pollutants, by using the ability of plants to absorb these substances. Cynodon Dactylon and lolium Perenne Brightstar plants are a type of grass that can be used to reduce high salt levels in the soil because these plants are able to live in places with high salinity and also have the ability to reduce salinity by absorbing chloride ions in it. The methods used in this research consisted of: Sampling Process, Plant Acclimatization Stage, Salinity Concentration Test before and after planting grass in Soil Media. The test results showed that the salt content in the soil before planting was 19.20 dS/m and after planting it was 0.02-0.03 dS/M.

Application of The Admiralty Method to Process Tidal Data in the Waters of The Nasik Strait - Bangka Belitung Pasaribu, Roberto Patar; Sewiko, Roni; 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

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 sertaÂ 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 diketahuiÂ 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;Â bilangan formzahl

Aplikasi Teknologi Drone dan Pendekatan OBIA Dalam Studi Idenifikasi Habitat Perairan Dangkal Sewiko, Roni; Damayanti, Sania Pareka; Sagala, Herlina Adelina Meria Uli
Jurnal Kelautan Vol 17, No 2: Agustus (2024)
Publisher : Department of Marine Sciences, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/jk.v17i2.22313

ABSTRAKHabitat perairan dangkal memiliki peran penting dalam menjaga keseimbangan ekosistem laut dan mendukung keberlanjutan sumber daya perikanan. Namun, pemahaman dan pemantauan yang efektif terhadap habitat ini menjadi semakin krusial dalam menghadapi tantangan lingkungan yang semakin kompleks. Artikel ini mengungkapkan penelitian yang bertujuan untuk mengidentifikasi habitat perairan dangkal dengan memanfaatkan teknologi drone dan pendekatan Object-Based Image Analysis (OBIA). Inovasi utama dalam penelitian ini adalah penggunaan drone untuk pemetaan habitat perairan dangkal, yang menghadirkan metode yang lebih efisien dan akurat dibandingkan dengan survei konvensional. Metode OBIA digunakan dalam pengolahan data citra drone, dengan dukungan Ground Truth Habitat dan analisis algoritma SVM. Hasilnya, tingkat akurasi keseluruhan mencapai 77%, dengan tingkat akurasi tertinggi untuk Lamun sebesar 22,6% dan terendah untuk karang mati sebesar 4,1%. Penggunaan user's accuracy juga mencerminkan hasil yang bervariasi, dengan akurasi tertinggi untuk Lamun sebesar 91% dan terendah untuk karang mati sebesar 54%. Penelitian ini memberikan kontribusi penting dalam pemahaman lebih dalam tentang habitat perairan dangkal, memfasilitasi pemantauan yang lebih efektif, dan memberikan landasan untuk upaya konservasi lebih lanjut di ekosistem perairan dangkal.Kata Kunci: Drone, OBIA, penginderaan jauh, SIG, pesisirABSTRACTShallow water habitats play a crucial role in Maintaining marine ecosystem balance and supporting sustainable fisheries resources. However, effective understanding and monitoring of these habitats have become increasingly critical in the face of complex environmental challenges. This article unveils research aimed at identifying shallow water habitats using drone technology and an Object-Based Image Analysis (OBIA) approach. The primary innovation in this study lies in the utilization of drones for shallow water habitat mapping, presenting a more efficient and accurate method compared to conventional surveys. OBIA methods were employed in processing drone image data, supported by Ground Truth Habitat and SVM algorithm analysis. The overall accuracy reached 77%, with the highest accuracy rates for Seagrass at 22.6% and the lowest for Dead Coral at 4.1%. User's accuracy usage also reflected varied results, with the highest accuracy for Seagrass at 91% and the lowest for Dead Coral at 54%. This research makes a significant contribution to a deeper understanding of shallow water habitats, facilitating more effective monitoring and providing a foundation for further conservation efforts in shallow water ecosystems.Keywords: Drone, OBIA, remote sensing, GIS, coastal

GROWTH RATE OF Nannochloropsis sp ACCORDING TO ADDITING CONCENTRATION OF ZINC (ZN) AND COOPER (CU) Sagala, Herlina Meria Uli; Pattirane, Chrisoetanto P; Sewiko, Roni; Wulandari, Ully; Sulistyowati, Beta Indi
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/

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. Cells density was calculated using a hemocytometer, and 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.

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