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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis METAMORFOSA Journal of Biological Sciences Journal of Marine and Aquatic Sciences Jurnal Biologi Udayana Bumi Lestari ILMU KELAUTAN: Indonesian Journal of Marine Sciences REKAYASA Jurnal Kelautan Tropis Jurnal Sumberdaya Akuatik Indopasifik Journal of Marine Research and Technology Musamus Fisheries and Marine Journal Ulil Albab
Putra, I Nyoman Giri
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Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Library & Information Science Physics Social Sciences

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Pemetaan Sebaran Habitat Dasar Perairan Laut Dangkal Menggunakan Citra Sentinel-2A di Teluk Gilimanuk I Gusti Putu Bayu Arri Putra; I Dewa Nyoman Nurweda Putra; I Nyoman Giri Putra
Journal of Marine and Aquatic Sciences Vol 9 No 1 (2023)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2023.v09.i01.p03

Abstract

West Bali National Park is a conservation area with such a high biodiversity. That includes mangrove forest, coastal, and shallow water ecosystem. As a conservation area, a distribution map of the shallow water habitat is necessary for decision making in the conservation’s benthic habitat developing program. One of the mapping method is remote sensing and requires Sentinel-2A Level 1C satelitte image. Sentinel-2A Level 1C is used due to its high resolution which is 10x10 meters for a single pixel. The aim for this research is for mapping the distribution of the shallow water habitat in Gilimanuk Bay while also assesses the accuracy of Sentinel-2A image. This research uses the Quantum GIS and SAGA GIS software to analyze the Sentinel-2A image. The image is transformed using Depth Invariant Index to reduce the scattering effect on the reflectance. After the image is being transformed by the Depth Invariant Index, it is classified using maximum likelihood method. The classification showed, the area of each classes are 56.59 hectares of corals, 18.01 hectares of seagrass, 128.97 hectares of waters, 45.76 hectares of mud sediment, 78.95 hectares of macro algae, and 26.67 hectares of sands. Overall accuracy assessment for this research calculated using confusion matrix and the result is 65.1% and considered good enough due to Coral Ecosystem Remote Sensing Data Analysis Guide by National Institute of Aeronautics and Space (LAPAN), in which the tolerance of the accuracy is 60%. Accuracy levels are influenced by number of classes, image resolution, class resemblance, turbidity, and seafloor material.
Keanekaragaman Iktiofauna Ekosistem Estuari Taman Hutan Raya Ngurah Rai, Bali Gabrielle Aisya; Nyoman Dati Pertami; I Nyoman Giri Putra
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.p01

Abstract

The diversity of ichthyofauna is an important aspect that can be used to presume the aquatic environmental conditions. Therefore, this study aims to determine the diversity of ichthyofauna in Taman Hutan Raya (TAHURA) Ngurah Rai, Bali during the eastern season and transitional II season. The sample was collected from July 2022 – October 2022 using an experimental gill net. During the sampling period of this study, 413 fishes were caught, representing 18 different species from 17 genera, 14 families, and 12 orders. Based on the results of the analysis, the highest diversity value was found in the waters of Jimbaran, then the waters of Kampung Kepiting, while Serangan waters has the lowest diversity value (H’<1). The lowest uniformity index was found in the waters of Serangan because it is dominated by only one fish species, namely Ambassis macracanthus (Seriding Fish), while in the waters of Kampung Kepiting and Jimbaran, the uniformity is quite even. The highest dominance index was found in the waters of Serangan, while other water areas has no dominating species. The species composition found at all stations varied considerably, but the results of the IUCN status showed that most of the fishes were still in the category of data deficient and not evaluated. The highest abundance was found in the waters of Serangan. The water quality parameters of TAHURA Ngurah Rai showed that not all aspects are in accordance with quality standards for marine life.
Frekuensi Pemunculan, Tingkah laku, dan Diversitas Cetacea di Perairan sekitar Labuan Bajo, Flores, Nusa Tenggara Timur Priscilla Princessa Amalo; I Dewa Nyoman Nurweda Putra; I Nyoman Giri Putra
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.p08

Abstract

At least 30 cetaceans live in Indonesia, especially in the eastern waters of Indonesia, consisting of whales and dolphins. Cetaceans play an important role as a key species in determining the health of marine ecosystems. This study aims to determine the frequency of appearance, behavior, and diversity of cetaceans along Labuan Bajo, Flores, and East Nusa Tenggara. The study was conducted in October-November 2021, with four weeks to collect field data and interviews. The data involved a ship carrying a group of observers consisting of four people, with each task assigned to look for the appearance, species, and behavior of cetaceans. In the interview methods, interviews were conducted with fishermen regarding the presence of cetaceans. The data was then processed using the Microsoft Excel program and later plotted using the ArcView program as the outpour of the cetacean distribution. The results showed 19 occurrences of cetaceans, with six occurrences found in the field survey and 13 based on interviews with fishermen. Appearances were found to be evenly distributed in the study area, with a total of 7 species of cetaceans found, namely Stenella longirostris, Stenella attenuata, Tursiops truncates, Pseudorca crassidens, Grampus griseus, Kogia simus, and Physeter macrocephalus. In species composition and abundance, S. longirostris species had the highest value, and the P. crassidens species had the lowest composition value. A value of 1.06 was found in diversity, indicating that the cetaceans in Labuan Bajo were classified as moderate. Some behaviors include aerials, spy hopping, bow-riding, feeding, and avoidance.
Hubungan Panjang-Bobot dan Faktor Kondisi Ikan Estuarine Glass Perch (Ambassis macracanthus Bleeker, 1849) di Perairan Taman Hutan Raya (Tahura) Ngurah Rai, Teluk Benoa, pada Musim Timur Franceska Kendra Rossa S; Nyoman Dati Pertami; I Nyoman Giri Putra
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.p10

Abstract

The growth aspect is important in determining fish well-being in an area. However, research on the growth aspect of Ambassis macracanthus Bleeker, 1849, in Ngurah Rai Forest Park has never been conducted This study aims to determine the length-weight relationship and condition factor of A. macracanthus as well as to evaluate the water condition in Ngurah Rai Forest Park, Benoa Bay during the east season. The sample was collected applying descriptive and quantitative methods, whilst the purposive sampling method was used to take the samples from three stations using Bubu and experimental gill net. During the sampling collection process, 304 fish individuals were caught by the experimental gill net at station 1 (Serangan waters). Based on the analysis between the length and weight relationship of A. macracanthus, the equation of W=0,024L2.38, where from this equation, the value of b = 2.38 is obtained. Through the T-test, the value of b < 3 showed a negative allometric growth pattern; namely, the growth in length is more dominant than the increase in weight. The average relative condition factor increased monthly, with the highest value of 1.37 in August. However, the value of the relative condition factor indicates that the fish in Tahura waters are thin (Kn < 2). In general, the temperature and dissolved oxygen of Ngurah Rai Forest Park waters are not following quality standards.
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.
Analisis Isi Perut Ikan Apogonidae di Teluk Gilimanuk, Bali Ni Luh Putu Emi Trisna Dewi; I Nyoman Giri Putra; I Putu Yogi Darmendra
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.p04

Abstract

The types of natural food consumed by fish can vary according to their species and its age level. The purpose of this study was to determine the types of organisms feed by Apogonidae fishes by observing their gut contents and to determine the type of feeding habits of these fishes. This research was conducted at two sampling sites within Gilimanuk Bay, Bali. Specimen collection was conducted in the morning (07.00 am) using a scoop net while scuba diving. We successfully collected 32 individual Apogonidae, which consist of eight species. Each sample was dissected and the contents of the stomach were removed from the esophagus to the intestine. The stomach contents were preserved using 4% formalin, and then the samples were observed under a binocular microscope with 40x magnification. The results showed that the highest composition of food species found as the main food was the Copepod of 59.86% which was fed by Sphaeramia nematoptera, Cheilodipterus artus, Fibramia thermalis, Pterapogon kaudernii, Zoramia leptacantha, Rhabdamia gracilis, and Ostorhichus hoevenii, Bacillariophyceae by 31.97% were feed by S. nematoptera, C. artus, O. hartzfeldii, F. thermalis, P. kauderni, Z. leptacantha, R. gracilis, and O. hoevenii. The other class of plankton only made up a small part of the food composition of the Apogonidae fishes, which is as much as 8.16%. Based on our results, we conclude that Apogonidae fishes in Gilimanuk Bay were plankton feeders where all the food found comes from phytoplankton and zooplankton organisms.
Korelasi Kelimpahan Megabentos dengan Persentase Tutupan Terumbu Karang di Perairan Amed, Kabupaten Karangasem, Bali Nurdyputra, I Gusti Ngurah Galih Ksatria Mahadhika; Putra, I Nyoman Giri; Atmaja, Putu Satya Pratama
Bumi Lestari Journal of Environment Vol 24 No 1 (2024)
Publisher : Environmental Research Center (PPLH) of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/blje.2024.v24.i01.p08

Abstract

The existence of each megabenthos is related to the condition of coral reefs which act as habitats for various types of megabenthos species. Benthos are commonly takes advantage of the ecosytem of coral reef as a habitat to live and shelter in the coral niches from natural predators. This study aimed to determined the abundance of megabenthos and the percentage of coral reef cover, as well as the correlation between the abundance of megabenthos and the percentage of live coral cover in Amed Waters. Megabenthos data collection was carried out using the Benthos Belt Transect (BBT) method. Point Intercept Transect (PIT) was used to examined the coral percentage cover. Correlation of Pearson was used to analyzed the correlation between abundance of megabenthos and coral percentage cover. A total of 473 individuals with a total abundance of 0.26 ind/m2 were found in this study. Interestingly, there were no Acanthaster planci individuals found during the data collection. The condition of coral reefs was dominated by Dead Coral Algae (DCA), while the percentage value of live coral cover in Amed Waters were 19% to 35% in the damaged to moderate category, respectively. Pearson correlation showed a value of (r) 0.067 with a very weak positive category which indicates that there is a positive relationship between the two variables which indicating that the correlation of megabenthos abundance has no significant relationship with the percentage of live coral cover. Keywords: megabenthos; Amed; Pearson; dead coral algae
Keanekaragaman Jenis Makroalga di Perairan Teluk Gilimanuk Bali Dicky Septiady; I Gede Hendrawan; I Nyoman Giri Putra
ULIL ALBAB : Jurnal Ilmiah Multidisiplin Vol. 2 No. 10: September 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jim.v2i10.2253

Abstract

Makroalga di pesisir Indonesia memiliki keanekaragaman spesies biodiversity yang tinggi, namun organisme ini sangat rentan terhadap perubahan kondisi lingkungan baik secara alami seperti faktor angin, gelombang, arus dan musim menjadi faktor pemicu perubahan habitat makroalga. Tujuan penelitian ini untuk mengetahui komposisi jenis, keanekaragaman, keseragaman, dominasi dan kelimpahan jenis makroalga yang terdapat di kawasan perairan Teluk Gilimanuk. Data yang dikumpulkan berupa data primer, metode pengumpulan data yang digunakan pada penelitian ini yaitu metode obsevasi pada 3 stasiun dengan jarak antar stasiun 20 meter. Selain itu dilakukan pengamatan parameter fisika dan kimia perairan sesuai dengan lokasi penelitian. Hasil penelitian ditemukan makroalga yang terbagi kedalam 3 devisi makroalga yaitu alga hijau (Chlorophyta), alga merah (Rhodophyta) dan alga coklat (Phaeophyta) yang terdiri dari 6 genus yaitu Ulva, Halimeda, Amphiroa, Gracilaria, Rosenvingea, dan Dictyota. Nilai Indeks keanekaragaman makroalga dikategorikan rendah hingga sedang, Nilai indeks keseragaman pada stasiun satu rendah dan pada stasiun dua dan tingga dikategorikan tinggi. Adapun nilai indeks dominansi (C) pada stasiun satu dikategorikan tinggi.
Coral Fish Biodiversity Assessment on Different Locations (Case Study of the North Bali ICRG Area). Potje, Emilian Ivarlyano; Wiyanto, Dwi Budi; Giri Putra, I Nyoman; Demianus Hukom, Frensly
Rekayasa Vol 17, No 1: April, 2024
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v17i1.24171

Abstract

Reef fish associated with artificial reefs are one indicator of success for artificial reef applications. This research was carried out in February 2023. Reef fish data was collected in three tidal conditions. Data of Coral fish was collected using the Underwater Visual Census (UVC) method. The data that collected includes abundance of species, individual abundance and fish size from 3 categories namely major, indicators and targets. From the results, the community structure at each location obtained the same diversity index and uniformity index which were classified as moderate to high and the dominance index was classified as low. For each tidal condition the diversity index obtained was classified as medium to high, the uniformity index is relatively high and the dominance index is low. The total abundance of species at each point ranges from 26 species represented by 13 families to 63 species represented by 19 families, and for each tidal condition it ranges from 11 species represented by 7 families to 42 species represented by 16 families. The total abundance of individuals at each point overall ranged from 1333-20,048 Ind/Ha, each tidal condition it ranges from 20- 980 individuals. The total biomass at each point overall ranged from 102,844- 1353,119 Kg/Ha, each tidal condition ranges from 2,154 to 63,780 kg. Based on the results, the species similarity index values at each point were categorized as medium, except for Les II and Galeri, which were classified as high, while the test results for each tidal condition ranged from medium to high at each point. Test results (Mann-Whitney) for each point based on individual abundance values and coral reef fish biomass generally showed significant differences except between the Gallery and Les II points, whereas for each tidal condition there were no significant differences. Based on the results of the Correspondence Analysis, it was found that there was a relationship between several types of fish with each research point and at each tidal condition, this shows that the artificial reef structure at each point and each tidal condition was successful in attracting fish populations.
Co-Authors Alanis Ismi Akasia Andrianus Sembiring Andrianus Sembiring Andrianus Sembiring Andrianus Sembiring Anisa Dea Novianti Astria Yusmalinda Astria Yusmalinda Atmaja, Putu Satya Pratama Bertha Ayu Andhira Casamira Gitta Prasetyo Chloe Henderson Dandi Saleky Danie Al Malik Danie Al Malik Demianus Hukom, Frensly Dewa Ayu Wedha Astiti Dicky Septiady Dwi Budi Wiyanto Eka Andiani, Anak Agung Elok Faiqoh Elok Faiqoh Endang Wulandari Suryaningtyas Franceska Kendra Rossa S Gabrielle Aisya Gede Surya Indrawan Gede Surya Indrawan Gede Yuda Kamajaya Gilang Pratama I Dewa Nym. Nurweda P., I Dewa Nyoman Nurweda Putra I Gede Ening Sumantra I Gede Hendrawan I Gede Hendrawan I Gede Panji Agung Purnomo I Gusti Bagus Sila Dharma I Gusti Ngurah Putra Dirgayusa I Gusti Putu Bayu Arri Putra I Gusti Sila Dharma I Ketut Suta Negara I Putu Sugiana I Putu Yogi Darmendra I Wayan Arthana I Wayan Eka Dharmawan I Wayan Gede Astawa Karang IDA AYU ASTARINI Irman Rumengan Kadek Dwi Artama Kadek Widya Suryaningsih Ketut Popi Anjani Devi Luh Astria Yusmalinda M. Danie Al Malik Ni Luh Putu Emi Trisna Dewi Ni Luh Putu Ria Puspitha Ni Putu Dian Pertiwi Ni Putu Dian Pertiwi Ni Putu Putri Wijayanti Nikmah Fitria Nuraini Nur Ismu Hidayat Nurdyputra, I Gusti Ngurah Galih Ksatria Mahadhika Nyoman Dati Pertami Paul Helga Fernandez Potje, Emilian Ivarlyano Priscilla Princessa Amalo Putra Bagus Panji Pamungkas Putu Dian Pertiwi Putu Dian Pertiwi Putu Maya Witariningsih Rowand Danny Sebastian Adinegoro Sartika Ristama Silitonga Septi Novita Sari Shella Ayu Ardiana Simon P.O Leatemia Stephanus Tambunan Suryany Devy Wiratama, I Gusti Ngurah Made Yuanike Yuanike Yulianto Suteja