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All Journal Journal of Marine and Aquatic Sciences Bumi Lestari Ecotrophic, Journal of Environmental Science BULETIN OSEANOGRAFI MARINA Jurnal Ilmu Lingkungan Journal of Marine Research Journal of Marine Research and Technology Jurnal Ilmiah Sains Jurnal Pengabdian Kepada Masyarakat Itekes Bali Journal of Fisheries & Marine Ulil Albab Advances in Tropical Biodiversity and Environmental Sciences
Gede Surya Indrawan
Program Studi Ilmu Kelautan, Fakultas Kelautan Dan Perikanan, Universitas Udayana, Badung-Bali
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Immunology & microbiology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Veterinary Other

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Pemetaan Distribusi Lamun di Selat Ceningan Menggunakan Drone Komersial I Gede Andika Wijantara; I Wayan Gede Astawa Karang; Gede Surya Indrawan
Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2022.v08.i02.p12

Abstract

Remote sensing is growing with the drone which can overcome problems and weaknesses on satellite imagery. This research uses mapping techniques on seagrass to the species level using drones that use the high resolution to generate data. The purpose of this study was to determine the distribution species of seagrass in Ceningan Strait using drone. Data is collected at the date of 12 and 13 march 2020 by using 50 cm x 50 cm transect which is done by systematic random sampling, and images capture using drones phantom 3 standard by performing five flights, and the results will be combined into one form of a mosaic. The method used is the classification of GEOBIA (Geographic Object Based Image Analysis) which is validated with field data. From the results of the research conducted, three species were identified using drones, namely seagrass with the species Thalasia hemprichi, Cymodocea rotundata, and Syringodium isoetifolium. The results of the drone image classification showed that the variation in the area of cover of each species with the highest incidence was seagrass with Cymodocea rotundata (2.46 ha), followed by Thalasia hemprichi (1.02 ha), and Syringodium isoetifolium (0.26 ha). The results of the image classification show a fairly good level of accuracy with an accuracy value of 68% and the kappa coefficient with a value of 0.55. From the results obtained, it was concluded that the mapping of seagrass species using drones was categorized as quite good.
Profil Indeks Kesesuaian Wisata di Pantai Semawang, Kelurahan Sanur, Denpasar Berbasis Zonasi Pemanfaatan Kawasan Ida Bagus Putu Adi Gita Saputra; I Gusti Ngurah Putra Dirgayusa; Gede Surya Indrawan
Journal of Marine Research and Technology Vol 6 No 1 (2023): FEBRUARI 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i01.p05

Abstract

The tourism suitability index (IKW) research conducted at Semawang Beach, Sanur Village, Denpasar, aimed to determine the limiting factors, the value of the tourism suitability index, and the zone of the utilization of the coastal tourism area for the recreation category. The method used is observation and survey in the field by purposive sampling at 4 station points, divided into a beach length of 710 m, and tourist interviews with as many as 50 respondents. The data include beach type, water depth, beach width, water base material, water current velocity, coastal slope, water clarity, coastal land cover, hazardous biota, and freshwater availability. The analysis of the tourism suitability index (IKW) refers to the tourism suitability matrix and the classification of the suitability of beach tourism in the recreation category. The limiting factor of the tourism suitability in Semawang Beach is the closure of coastal land. The value of the tourism suitability index (IKW) for beach tourism activities in the recreational category at Semawang Beach at the station I was 96.43%, station II was 90.48%, station III was 96.43%, and station IV was 94.04%. All stations are categorized as suitable (SS) for beach tourism activities. The used zone for coastal tourism areas for swimming, sunbathing, sports, and sightseeing can be carried out at all stations. The sacred zone is at Station II, adjacent to the entrance to the beach
Tingkat Kesejahteraan Nelayan Tradisional di Pantai Bias Lantang Desa Seraya Timur, Kabupaten Karangasem, Bali Luh Putu Diah Ananda Wijayanti; I Wayan Arthana; Gede Surya Indrawan
Journal of Marine Research and Technology Vol 6 No 1 (2023): FEBRUARI 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i01.p07

Abstract

Most of the people living on the coast of Bias Lantang Beach, East Seraya Village, work as fishermen with the main catch being of tongkol. This research conducted to gain an insight about the welfare of traditional fishermen and exchange rate of fishermen (NTN) Coast of Bias Lantang Seraya Timur, Karangasem, Bali using BPS indicator and NTN. The population in this study research are all traditional fishermen that are on the Coast of Bias Lantang Seraya Timur. Sampling of these studies is done using calculations from Slovin analysis. As for the method used in this research is case study method with a descriptive analysis, in which data collection is done using a questionnaire and presented in the form of a chart. The results from the prepared questionnaire's data indicate the level of traditional fishermen's welfare and the NTN that was calculated using a NTN. According to BPS, as known traditional fishermen on Bias Lantang Beach Seraya Timur Village had a high score of welfare rates (high range of score 15-21) with total score 18. Whereas based on the NTN it is known that the value of the traditional fishermen on Bias Lantang Beach Seraya Timur Village is 0.95 while the results of NTN<1 showing that traditional fishermen tend to possess a low welfare rated. As a result, there is a difference between the traditional welfare of fishermen on the Bias Lantang Seraya Timur Village used the BPS indicator and the use of NTN. This is because of the welfare of traditional fishermen using BPS indicator methods such as income, expenses, education, health, place, facilities, and status of ownership, wherefrom the seven indicators four indicators had a high score of indicator (score 3). Whereas NTN consists of two indicators (income and expenses), where the expenses of fishermen are bigger than the income.
Studi Potensi Tsunami Bali Utara Menggunakan Metode Numerik Idam Bali Haryono; I Gede Hendrawan; Gede Surya Indrawan
Journal of Marine Research and Technology Vol 6 No 2 (2023): AGUSTUS 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i02.p02

Abstract

Bali Island is one of the most tsunami-prone areas in Indonesia. Two tectonic tsunami sources flank Bali Island: The Megathurst subduction zone in the south and the Back Arc Thurst subduction zone in the north. This study aimed to add information about the tsunami arrival time and the maximum height of the tsunami waves that hit the coast using COMCOT software as a disaster mitigation measure. Five scenarios were used in this study with the differences in the magnitude of tsunami-generating earthquakes. Results showed that the fastest affected shoreline by the tsunami in scenarios 1, 2, and 3 is the Tejakula Sub District shoreline, with a period of 5 minutes 41 seconds to 3 minutes 43 seconds. In scenarios 4 and 5, it was found on the Sawan Sub District shoreline for 2 minutes, 51 seconds to 56 seconds. The maximum run-up of tsunami waves that hit the shoreline in scenarios 1, 2, 3, and 4 are on the Kubu Sub District shoreline with run-up heights of 0.0095 m, 0.47 m, 1.5 m, and 3 m. In scenario 5, the highest run-up is on the Banjar Sub District shoreline, with a 67.6 m run-up height. Based on the results of this study, it can be concluded that the magnitude of the tsunami-generating earthquake greatly influences the travel time and run-up height of the tsunami waves. The greater the magnitude of the tsunami-generating earthquake, the faster the travel time of the tsunami waves and the higher the run-up height.
Penilaian Kondisi Komunitas Mangrove di Kawasan Hutan Mangrove Ciletuh, Sukabumi, Jawa Barat Muhammad Imran Zaelani; I Wayan Arthana; Gede Surya Indrawan
Journal of Marine Research and Technology Vol 6 No 2 (2023): AGUSTUS 2023
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2023.v06.i02.p07

Abstract

This study aimed to analyze the composition of mangrove vegetation, the Important Value Index (IVI) of mangroves, the condition of the mangrove community (mangrove density and mangrove canopy cover), and environmental parameters as supporting data in the Ciletuh Mangrove Forest Area, Sukabumi, West Java. The research method used in this research is a quantitative descriptive method. The number of stations determined is four; each observation station is made of a plot of 10 x 10 meters, with three plots for each station. The results found seven mangrove species, namely Avicennia marina, Bruguierra cylindrica, Rhizophora apiculata, Rhizophora mucronata, Aegiceras corniculatum, Hibiscus tiliaceus, and Nypa fruticans. The mangrove species found were dominated by A. marina, where this species was found at all stations and had the highest Important Value Index (IVI) value among other species, ranging from 88.96 - 195.55%. Mangrove communities in the Ciletuh Mangrove Forest Area are in good condition referring to the Decree of the Minister of Environment No. 201 of 2004 concerning Standard Criteria and Guidelines for Mangrove Damage with density values ranging from 1533 – 2933 stands/ha and the percentage of mangrove canopy cover ranging from 80.54 - 82.22%.
Hubungan Antara Kelimpahan Ikan dengan Tutupan Lamun di Perairan Sanur, Bali Bertha Ayu Andhira; Gede Surya Indrawan; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 7 No 1 (2024): FEBRUARI 2024
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2024.v07.i01.p03

Abstract

Seagrass is aquatic ecosystems that is very beneficial for marine biota. One of the functions of seagrass fields is as a place to live, shelter, and place to find food for various types of fish. The correlation between seagrass and fish is very close, this study aims to decide the association between the abundance of the fish and the coverage of seagrass cover in Sanur, Bali. Samples were taken at two stations in Sanur which represented high seagrass cover, namely Sindhu Beach, and medium cover, namely Karang Beach. Data collection on seagrass cover and types was used in a 100 m line transect. The method that is used for taking the number and type of fish is using two methods, namely underwater visual census and beach nets. The results found eight species of seagrass, including Enhalus acoroides, Thalassia hemprichii, Syringodium isoetifolium, Cymodocea serrulata, Cymodocea rotundata, Halodule uninervis, Halodule pinifolia, and Halophila ovalis. Seagrass cover on Sindhu Beach is 72.2%, and Karang Beach is 50.2%. The fish found were 1,180 individuals, including 41 species from 18 families. The greatest abundance was in Sindhu Beach, which was dominated by Plotosus linneatus from the Plotosidae family, with a relative abundance of 30%, and the lowest abundance was on Karang Beach with the Plectorhinchus vittatus from the Haemulidae family, with a relative abundance of 0,2%. Diversity is worth 2.83, Variety is 0.80, and Dominance is 0.13. The correlation between fish abundance and seagrass cover is categorized as positive with a value of 0.8924 which indicated that a high seagrass cover has a high fish abundance and vice versa.
Pengaruh Warna Lampu yang Berbeda terhadap Laju Pertumbuhan Chaetoceros calcitrans Rijal Rahmatullah; I Wayan Nuarsa; Gede Surya Indrawan
Journal of Marine Research and Technology Vol 7 No 1 (2024): FEBRUARI 2024
Publisher : Department of Marine Sciences, Faculty of Marine and Fisheries, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2024.v07.i01.p08

Abstract

Chaetoceros calcitrans is one of the diatoms commonly used as a natural feed for cultivated fish larvae. The cultivation of C. calcitrans as natural feed is influenced by various factors, including light as a source for photosynthesis. This research aimed to determine the effect of different light colors on the growth rate and identify the optimal color for the growth rate of C. calcitrans. The research was conducted at the BPIU2K Karangasem laboratory. The experimental method with a Completely Randomized Design (CRD) was employed, consisting of three treatments and one control. Treatment A used yellow-colored lights, treatment B used blue-colored lights, treatment C used green-colored lights, and treatment D served as the control using white-colored lights. The observed parameters included population density, specific growth rate, and doubling time. The results were analyzed using ANOVA. The findings indicated that the light color significantly affected the population density, specific growth rate, and doubling time with a value of (Sig.<0.05). The best treatment was the use of white-colored lights, followed by yellow-colored lights, which resulted in the highest density on the 5th day, reaching 1.238,88 x 104 cells/ml and 1.040,55 x 104 cells/ml, respectively. The specific growth rate for white and yellow lights was 8.51%/hour and 7.53%/hour, respectively. The doubling time for white and yellow lights was 14.93 hours and 15.75 hours, respectively. White and yellow light irradiation exhibited wavelengths suitable for the cultivation of C. calcitrans.
Edukasi Mengenai Nilai Gizi Dan Kesehatan Mengkonsumsi Ikan Di Sekolah Dasar Indrawan, Gede Surya; Padmiswari, A.A. Istri Mas; Antari, Ni Wayan Sukma; Damayanti, Ida Ayu Manik; Wulansari, Nadya Treesna; Adiana, I Nengah; Sutrisna, Putu Gede; Wicaksana, IGA Tresna
Jurnal Abdimas ITEKES Vol 3 No 2 (2024)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Institute Teknologi dan Kesehatan (ITEKES) Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37294/jai.v3i2.581

Abstract

Ikan merupakan salah satu sumber protein hewani yang banyak dikonsumsi masyarakat, mudah didapat, dan harganya murah. Nilai gizi dari ikan meliputi protein, karbohidrat, vitamin, mineral, dan asam lemak omega 3 yang memiliki manfaat baik untuk tubuh. Kandungan asam amino dan omega 3 pada ikan juga jauh lebih baik jika dibandingkan dengan bahan pangan yang bersumber dari protein lainnya. Tujuan dari kegiatan ini adalah untuk meningkatkan pengetahuan siswa mengenai nilai gizi dan kesehatan mengkonsumsi ikan. Kegiatan edukasi mengenai nilai gizi dan Kesehatan mengkonsumsi sangat penting dilakukan di SDN 1 Cemagi. Kegiatan diikuti oleh 50 orang siswa kelas IV sampai kelas VI dimana mereka diberikan edukasi atau penyuluhan mengenai hal tersebut. Untuk mengukur keberhasilan kegiatan, siswa diminta untuk mengisi pretest dan posttest yang terdiri dari 10 pertanyaan yang berkaitan dengan nilai gizi dan kesehatan ikan. Kegiatan ini berhasil dilakukan karena terdapat peningkatan pengetahuan siswa yang signifikan mengenai nilai gizi dan kesehatan mengkonsumsi ikan. Adanya dukungan dari guru dan orang tua dalam kegiatan seperti ini perlu dilakukan berkelanjutan dalam upaya peningkatan pengetahuan gizi anak di sekolah dasar. Kata Kunci: pengetahuan, nilai gizi, kesehatan ikan
Kondisi Makrozoobentos Kaitannya dengan Ekosistem Mangrove di Kawasan Mangrove Estuari Perancak, Jembrana, Bali Purba, Sindi Krisanti; Indrawan, Gede Surya; Suteja, Yulianto
Buletin Oseanografi Marina Vol 14, No 1 (2025): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v14i1.64699

Abstract

Ekosistem mangrove memainkan peran penting dalam mendukung kehidupan akuatik, sebagai sumber makanan, tempat pembesaran dan tempat pemijahan bagi berbagai organisme akuatik. Kondisi lingkungan mangrove sangat memengaruhi keberadaan biota perairan, terutama makrozoobentos. Penelitian ini dilakukan untuk mengetahui kelimpahan makrozoobentos, kondisi kerapatan mangrove, serta hubungan parameter lingkungan dan kerapatan mangrove dengan kelimpahan makrozoobentos menggunakan pendekatan Principal Component Analysis (PCA). Penelitian ini dilakukan pada bulan Oktober 2023 di ekosistem mangrove Perancak, Jembrana, Bali dengan pengambilan sampel di tiga jenis habitat mangrove: mangrove alami, restorasi, dan campuran. Data mangrove dikumpulkan menggunakan transek berukuran 10x10m2, adapun pengambilan data makrozoobentos menggunakan transek 1x1m2.. Hasil pengukuran kualitas air menunjukkan suhu berkisar antara 28,67-30,87OC, pH 6,25-6,45, salinitas 27,78-30,89‰, oksigen terlarut 2,15-2,81 mg/L dan kadar nitrat 0,49-0,97 mg/L. Nilai tersebut menunjukkan bahwa kondisi kualitas air pada lokasi penelitian dalam kondisi baik dan mendukung pertumbuhan makrozoobentos. Selain itu, tekstur sedimen didominasi oleh substrat lempung liat berdebu. Makrozoobentos yang ditemukan terdiri dari 15 spesies dari 10 famili dan 3 kelas yaitu Gastropoda, Polychaeta, dan Malacostraca. Kelimpahan makrozoobentos berkisar antara 12,87-16,3ind/m2, sedangkan kerapatan mangrove berada pada kategori sangat padat dengan nilai antara 2300-3566 ind/ha. Indeks keanekaragaman 1,52-2,31, indeks keseragaman 0,78-0,9, dan indeks dominansi 0,12-0,29. Nilai indeks ekologi ini menunjukkan bahwa makrozoobentos berada dalam kondisi seimbang. Berdasarkan hasil analisis PCA, kelimpahan memiliki korelasi positif dengan variabel kerapatan mangrove, suhu, oksigen terlarut (DO), dan pH. 
Kandungan Nitrogen (N) dan Fosfor (P) Pada Sedimen Mangrove Di Taman Hutan Raya Bali Harifah, Zahwa Aulia Nurul; Gede Surya Indrawan; I Putu Yogi Darmendra
ULIL ALBAB : Jurnal Ilmiah Multidisiplin Vol. 4 No. 5: April 2025
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jim.v4i5.8876

Abstract

Penelitian ini bertujuan mengetahui kandungan nitrogen (N), kandungan fosfor (P), kerapatan jenis, serta keanekaragaman mangrove di Taman Hutan Raya Bali. Pada penelitian terdapat 3 stasiun dan masing-masing terdapat 3 plot di setiap stasiun. Mengunakan metode purposive sampling pada tiap stasiun. Berdasarkan hasil penelitian menunjukan ditemukan sebanyak 4 jenis yaitu: Rhizophora apiculata, Rhizophora mucronata, Bruguiera gymnorrhiza, dan Sonneratia alba dengan jumlah spesies yang paling banyak yaitu Soneratia alba dengan jumlah 210 individu dan jumlah yang paling sedikit ialah Bruguiera gymnorrhiza dengan jumlah 23 individu. Nilai kadar kandungan nitrogen terbesar berada pada stasiun I plot ke-3 sebesar 0,39% dan nilai kadar kandungan nitrogen terkecil berada pada pada stasiun III plot ke-3 sebesar 0,03%. Serta nilai kadar kandungan fosfor terbesar berada pada stasiun I plot ke-1 sebesar 81,08 ppm dan nilai kadar kandungan fosfor terkecil berada pada pada Stasiun II plot ke-2 sebesar 4,51 ppm. Nilai kerapatan mangrove termasuk kriteria sangat rapat dengan nilai antara 3133- 5067 (pohon/ha). dengan nilai keanekaragaman sebesar 0,86 dengan kategori keanekaragaman rendah, keseragaman 0,77 dengak kategori keseragaman tinggi, dan dominansi 0,74 yang menandakan terdapat dominansi. Parameter lingkungan rata rata seperti suhu sekitar 29,55℃, sedangkan nilai rata rata dari salinitas adalah 30,06 ppt dan pH rata-rata adalah 5,98.
Co-Authors Abd. Rahman As-syakur Adi Ariyanto Wibisono Adiana, I Nengah Anisa Setyawati Atmaja, Putu Satya Pratama Bertha Ayu Andhira Deny Suhermawan Yusup Devi Ulinuha Dewa Ayu Intan Tirta Sari Dwi Budi Wiyanto Dzaki Adilla Razaan Elok Faiqoh Harifah, Zahwa Aulia Nurul I Dewa Nym. Nurweda P., I Gede Andika Wijantara I Gede Hendrawan I Gede Mita Anjas Swara I Gusti Ngurah Putra Dirgayusa I Ketut Wija Negara I Komang Agus Parnata I Made Saka Wijaya I Made Sara Wijana I Made Sara Wijana I Made Yunarta I Putu Aditya Budi Wacika I Putu Sugiana I Putu Sugiana I Putu Sugiana I Putu Yogi Darmendra I Wayan Arthana I Wayan Arthana I Wayan Eka Dharmawan I Wayan Gede Astawa Karang I Wayan Nuarsa Ida Ayu Manik Damayanti Ida Bagus Putu Adi Gita Saputra Idam Bali Haryono Komang Kartika Indi Swari Luh Putu Diah Ananda Wijayanti M. Rheza Rizki Syahputra Mochammad Rhasaan Habibie Muhammad Fikri Deliansyah Muhammad Imran Zaelani Nadya Treesna Wulansari Ni Made Ernawati, Ni Made Ni Wayan Sukma Antari Padmiswari, A.A. Istri Mas Pande Ketut Cahya Krisnanta Arioka Pande Komang Egar Prihandana Purba, Sindi Krisanti Putra, I Nyoman Giri Putra, I Nyoman Giri Putra Putu Angga Wiradana Putu Gita Asmarani Rahardja, Viryanando Evan Rijal Rahmatullah Sidik, Awalul Rizal Rohman Sutrisna, Putu Gede Viryanando Evan Rahardja Wibisono, Adi Ariyanto Wicaksana, IGA Tresna Wijaya, I Made Saka Yulianto Suteja