cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
jmrt@unud.ac.id
Editorial Address
Jalan Kampus UNUD Bukit Jimbaran-Bali, 80363
Location
Kota denpasar,
Bali
INDONESIA
Journal of Marine Research and Technology
Published by Universitas Udayana
ISSN : 26210088     EISSN : 26210096     DOI : 10.24843/JMRT
Core Subject : Science,
Earth & Planetary Sciences
The Journal of Marine Research and Technology (JMRT) (p-ISSN 2621-0088 | e-ISSN 2621-0096) is an open access, scientific journal that aims to publish the dynamic of the coastal and ocean, its ecosystems and coastal environment, and Observation technology. JMRT is a peer-reviewed journal publishes original articles and critical reviews of current issues in marine science and technology. The range of topics extends from research in Oceanography, marine habitats, living resources, management and conservation issues related to the marine resources. This includes remote sensing, ocean modelling, geographic information System (GIS), coastal engineering, coastal processes, marine instrument, ecology, genetics, marine pollution, fisheries, marine ecotourism, and it's economic and social. JMRT provides a forum for the discussion and sharing all the latest issues in marine research and technology. Editorial manager system is an online manuscript submission, review and tracking system. JMRT is issued twice a year, each February and August.
Arjuna Subject : -
Articles 101 Documents
 5   6   7   8   9 
Hubungan Klorofil-a dan Suhu Permukaan Laut (SPL) Terhadap Hasil Tangkapan Ikan Lemuru Sardinella lemuru di Selat Bali Menggunakan Citra Aqua MODIS Tahun 2009-2018 Rony Clinton; I Wayan Gede Astawa Karang; Widiastuti Widiastuti
Journal of Marine Research and Technology Vol 5 No 1 (2022): FEBRUARI 2022
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2022.v05.i01.p08

Abstract

Oceanographic parameters such as sea surface temperature (SST) and chlorophyll-a in the water can influence the productivity of pelagic fish such as Lemuru. Many studies have been conducted on the relationship between SST and chlorophyll-a and the fluctuations in the catch of Lemuru fish, especially using satellite databased sensing technology. Most of the research using satellite data is done in a short-term period (not climatology), so there are still a lot of unanswered questions. One of them is: how the correlation between the fluctuation in the number of Lemuru fish catches is related to SST and chlorophyll-a in the ENSO and IOD periods. The purpose of this study is to determine the distribution of SST and chlorophyll-a concentrations and their relationship with the yield of Lemuru fish catches in the Bali Strait from 2009 to 2018. Aqua Moderate Imaging Spectroradiometer (MODIS) satellite data level 2 from Oceancolor and data on the number of fish caught in the Bali Strait from the National Fisheries Port (PPN) Pengambengan and UPT PPP Muncar. The method is used with correlation analysis between SST and chlorophyll-a to the number of Lemuru fish caught. The monthly average SST in Bali Strait waters from 2009 to 2018 was approximately 24,76 0C-30, 11 0C, with an estimated monthly chlorophyll-a concentration of 0,10 mg/m3-3,68 mg/m3. The spatial distribution of SST tends to be low in the southern Bali Strait and tends to be high in the northern Bali Strait. The spatial distribution of chlorophyll-a appears to have a high value in the near land area. The cross-correlation test between chlorophyll-a and the number of Lemuru catches showed a positive correlation yield at the 4th month lag. While the correlation of SST to the number of Lemuru fish catches shows a positive correlation at lag (-1).
Strategi Pengurangan Sampah Plastik di Laut Pada Kawasan Konservasi Perairan Nusa Penida : Studi Kasus Pulau Nusa Lembongan I Kadek Yogi Wiantara; I Gede Hendrawan; Widiastuti Widiastuti
Journal of Marine Research and Technology Vol 4 No 2 (2021): AGUSTUS 2021
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2021.v04.i02.p08

Abstract

Coastal and marine areas on small islands have a higher vulnerability to the impact of plastic waste, where plastic is a material that is difficult to decompose. Nusa Lembongan Island is one of the small islands that is included in the Marine Protected Area (MPA) and is one of the world's marine tourism destinations with various tourism activities in it. Tourism activities have a large enough opportunity for plastic waste pollution in the environment. This study aims to develop a priority strategy for reducing plastic waste based on the approach of internal and external factors on the island of Nusa Lembongan using the analysis of Strengths, Weaknesses, Opportunities, Threats (SWOT), and Analytical Hierarchy Process (AHP). Data were collected by observation, literature study, interviews, and questionnaires. Respondents were determined by purposive sampling and snowball sampling. The results of the data obtained were analyzed using the SWOT method which resulted in alternative strategies which were then analyzed using the AHP method. The results of the study indicate that the priority strategy is to maximize environmental facilities and add segregated waste bins to create mutually beneficial relationships with groups of self-management services and to realize the prevention of the use of single-use plastic waste as stated in Pergub Bali no. 97 of 2018 take advantage of the support of local NGOs to carry out synergistic and sustainable socialization.
Korelasi Kepadatan Banggai Cardinal Fish (Pterapogon kauderni) dengan Biota Asosiasi (Diadema setosum dan Fibramia thermalis) di Perairan Teluk Gilimanuk, Bali Stephanus Tambunan; I Wayan Arthana; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 5 No 1 (2022): FEBRUARI 2022
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2022.v05.i01.p04

Abstract

Banggai cardinal fish (Pterapogon kauderni) is a marine fish native to Indonesia. P. kauderni is listed as an endangered species in the red list category by the IUCN. P. kauderni is very dependent on microhabitats in the form of benthic animals (symbionts), namely sea urchins, sea anemones, and hard corals. Besides P. kauderni, other fish from the family Apogonidae also live in association with sea urchins. The purpose of this study was to examine the density of P. kauderni and associated biota and to calculate the density correlation between P. kauderni associated biota in the waters of Gilimanuk Bay, Bali. This study uses a modification of the Belt Transect method, with a transect of 50 meters long and 2.5 meters wide to the left and right. The total density of sea urchins was 0,088 ind/m2, the total density of Fibramia thermalis was 0,021 ind/m2, and the total density of P. kauderni was 0,071 ind/m2. Between P. kauderni and sea urchins there is a correlation with the value of r = 0,711 and a P-value of 0,031 < 0,05 which indicates that the large number of sea urchins will affect the number of P. kauderni in the waters. The correlation between density of P. kauderni and Fibramia thermalis worth r = 0,509 with P-value of 0,160 > 0,05, which means that the number of Fibramia thermalis has no effect on the number of P. kauderni.
Studi Karakteristik Suhu Permukaan Laut (SPL) Di Perairan Selat Lombok Menggunakan Citra Satelit EOS Aqua MODIS Fitra Cahya Prima; I Wayan Gede Astawa Karang; I Gede Hendrawan
Journal of Marine Research and Technology Vol 4 No 2 (2021): AGUSTUS 2021
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2021.v04.i02.p04

Abstract

The Lombok Strait is a strait located between Lombok Island and Bali Island which connects the waters of the Bali Sea to the Indian Ocean, whose SST conditions vary with oceanographic-atmospheric conditions in the Indian Ocean and the Pacific Ocean. This research aims to determine the temporal and spatial SST in the North and South Lombok Strait. Therefore, this study divides the Lombok Strait area into two because of the influence of the Pacific Ocean and the Indian Ocean. The method used in this research is descriptive and statistical analysis. The highest average monthly SST in the northern and southern Lombok Strait occurred in April at 29.11 °C and the lowest in August at 26.82°C. For the average seasonal SST, the highest occurred at transition I of 28.86°C, and the lowest occurred in the eastern season at 27.39°C. The highest average annual SST occurred in 2010 at 28.83°C and the lowest occurred in 2018 at 27.69°C. The northern SST anomaly has the same fluctuation as ENSO with inversely proportional IOD. Southern SST anomaly has fluctuation which is inversely proportional to ENSO and IOD. The correlation between SST anomaly in the north and ENSO correlates 0.90 (very strong), while with IOD it correlates 0.12 (very low). The correlation between SST anomaly in the southern part and ENSO correlates -0.11 (very low), while with IOD it correlates -0.73 (strong)
COVER VOLUME 4 NO 1, AGUSTUS 2021 admin JMRT
Journal of Marine Research and Technology Vol 4 No 2 (2021): AGUSTUS 2021
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

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

Abstract

COVER DAN DAFTAR ISI
Estimasi Stok Karbon Di Atas Permukaan Menggunakan Citra Sentinel-1A di Hutan Mangrove Karang Sewu, Bali Nikmah Fitria Nuraini; I Wayan Gede Astawa Karang; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 5 No 1 (2022): FEBRUARI 2022
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2022.v05.i01.p05

Abstract

Karang Sewu mangrove is one of the forests in the tropics that can store a higher amount of carbon compared to other forest. The researh of carbon storage in the Karang Sewu mangrove forest is required to support government policies in mitigating blue carbon. Research about above ground and below ground carbons in the Karang Sewu mangroves has not provided spatial information, and one of the techniques that can be used is remote sensing with Synthetic Aperture Radar (SAR). This research used SAR Sentinel-1A C-Band sensor imagery to estimate above-ground carbon in mangroves because it can penetrate the canopy to branch vegetation so that the backscatter value is not disturbed by water on the surface. The purpose of this study was to determine the above-ground carbon value in the mangrove forest Karang Sewu, Bali, using Sentinel-1A imagery. Estimation of above-ground carbon in SAR images using the sigma nought Vertikal Horizontal polarization method based on carbon estimation models from field data and image data. The best carbon estimator model is a polynomial model with the equation y = 0.1055x2 + 4.1507x + 43,691, R2 = 0.3347. The Root Mean Square Error (RMSE) error rate is 0,7. Based on the RMSE value, it can be concluded that the difference between the field carbon and the image carbon results is relatively small The estimation result of the total above-ground carbon value using Sentinel-1A imagery is 59.85 tons/ha.
Deteksi Perubahan Garis Pantai Menggunakan Teknik Geospasial, Studi Kasus Kecamatan Tejakula Hesti Aprianti; IGB Sila Dharma; I Gede Hendrawan; Nanin Anggaraini
Journal of Marine Research and Technology Vol 4 No 2 (2021): AGUSTUS 2021
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2021.v04.i02.p05

Abstract

The coastal area in Tejakula Subdistrict has many potential benefits for local people and the development of the region. Regarding its economic perspective, marine biodiversity can be utilized for tourism development. In terms of culture and history, this area has many archaeological findings ranging from prehistory until the colonial period. However, the recent study from Balai Arkeologi Bali stated the objects were sunk into underwater at a depth of 1-2 meters due to the abrasion process. Therefore, this research discussed the changes of shoreline in the Tejakula Subdistrict area as a preliminary study to protect and preserve its potential values. This research, both in terms of economy, culture, and history. The calculation of shoreline changes is using the Digital Shoreline Analysis System (DSAS) application with Net Shoreline Movement (NSM) and End Point Rate (EPR) methods. The results showed that the coastal segment in Tejakula District experienced an abrasion change with an abrasion rate of 0.89 m/year based on the SPOT satellite image analysis and 0.17 m/year from Landsat satellite imagery.
Analisis Konsentrasi Distribusi Sampah di Sepanjang Garis Pantai Kabupaten Badung, Tabanan, dan Jembrana Provinsi Bali Ni Luh Putu Bintang Witariani; I Gede Hendrawan; Ida Bagus Mandhara Brasika
Journal of Marine Research and Technology Vol 5 No 1 (2022): FEBRUARI 2022
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JMRT.2022.v05.i01.p01

Abstract

Marine debris is a global environmental problem of increasing concern. In Bali, the waste problem is becoming an emergency. With the Bali Strait threatened by pollution from marine debris, data are urgently needed. This study aimed to determine the concentration and distribution of marine debris along the coastline of Badung, Tabanan, and Jembrana Regencies. The study was conducted in February 2021 on 18 beaches with a distance of 10 km between points and 8 points near river downstream areas (estuaries) which were determined randomly. The results showed that 92% of debris were plastic waste which was classed as soft plastic (33%), hard plastic (25%), plastic straps (4%), fishing gear (0.4%), and foam (30%) with an average overall concentration of 1.32 items/m². A total of 3318 items were fragments (86.3%) and 527 items were whole (13.7%). The dominant size class of debris along coastline surveyed was 2-4 cm2 (30.21%). The highest mean concentration of marine debris was 3.84 items/m² with the dominant waste class being foam fragments with 240 items. The lowest mean concentration was 0.14 items/m². Marine debris was distributed along the coastline at different concentration levels in each region, where Badung Regency had a relative concentration value ranging from 0-20%, Tabanan Regency had a relative concentration value ranging from 0-40%, and Jembrana Regency was the most affected area with a relative concentration value of 0-100%.
Estimasi Simpanan Karbon Hutan Mangrove Menggunakan Citra (SAR) Synthetic Aperture Radar Sentinel -1 di Taman Hutan Raya Ngurah Rai,Bali Gede Dicky Pradipta Wedayana; I Wayan Gede Astawa Karang; Abd Rahman As-syakur
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.p03

Abstract

Taman Hutan Raya (Tahura) Ngurah Rai, Bali, is recorded to have a mangrove forest covering an area of 1,373.5 ha, which plays a role in absorbing carbon from the atmosphere. Carbon is stored in the form of biomass. The bigger the biomass, the bigger the carbon stock in it. Direct measurement of biomass in the field requires an expensive method, a relatively long time, and narrow area coverage. Nowadays, the weakness of measuring carbon stocks directly in the field can be overcome by remote sensing approaches, especially estimations from satellite imagery combined with geographic information systems (SIG). One of the images that can be used to estimate carbon stock is the Sentinel-1 Synthetic Aperture Radar (SAR) image. The aim of this research is to estimate biomass and carbon stocks based on SAR backscatter distribution. The method used is the analysis of satellite imagery combined with field data. Field data collection and above-ground biomass (AGB) calculations were carried out by taking 30 plots with a plot size of 10 x 10 m. The results showed that there was a correlation between the backscatter value of SAR images and AGB from field measurements (r = 0.59 and the AGB estimation model y = 57.42x + 1223.8, where y is biomass and x is backscatter), and the coefficient of determination R2 = 0.36. The estimation model developed next is used to calculate the overall AGB, which is then used to estimate the overall aboveground carbon storage.
Identifikasi dan Komposisi Hasil Tangkapan Ikan dengan Alat Tangkap Mini Purse Seine di Pesisir Kubutambahan, Bali Riska Purwanto; Nyoman Dati Pertami; I Ketut Wija Negara
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.p08

Abstract

Kubutambahan Village is one of the villages in Kubutambahan Subdistrict, Buleleng Regency with the main catch fishery potential of Mackerel scad and several other species of fish. The fishing gear used by fishermen is dominated by mini purse seine. The purpose of this research was to determine the types of fish caught and the composition of fish catches. This research was conducted from September 2021 until October 2021. The data were obtained by direct observation in the field. Fish samples were taken using simple random sampling. The results showed that there were 20 species of fish, grouped into 5 orders, 9 families and 16 genera. The composition of the catches of fishermen using mini purse seine is dominated by Mackerel scad at 48.4% and the lowest is Hound Needlefish at 0.001% of overall catch.

Page 7 of 11 | Total Record : 101

 5   6   7   8   9 

Filter by Year

2018 2024


Reset
Filter By Issues
All Issue Vol 7 No 1 (2024): FEBRUARI 2024 Vol 6 No 2 (2023): AGUSTUS 2023 Vol 6 No 1 (2023): FEBRUARI 2023 Vol 5 No 1 (2022): FEBRUARI 2022 Vol 4 No 2 (2021): AGUSTUS 2021 Vol 4 No 1 (2021): FEBRUARI 2021 Vol 3 No 2 (2020): AGUSTUS 2020 Vol 3 No 1 (2020): FEBRUARI 2020 Vol 2 No 2 (2019): AGUSTUS 2019 Vol 2 No 1 (2019): FEBRUARI 2019 Vol 1 No 1 (2018): AGUSTUS 2018 More Issue