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Journal of Marine Research and Technology

JMRT
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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.

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Articles 101 Documents

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Estimasi Potensi Produksi Rumput Laut di Perairan Nusa Penida Menggunakan Citra Landsat 8 Made Pande Darmawan; I Dewa Nyoman Nurweda Putra; Widiastuti Karim
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Seaweed is a macroalgae that has many benefits for humans, therefore to meet human needs, seaweed is developed by cultivation. One place for seaweed cultivation in Bali Province is in Nusa Penida Sub-district, which is a water conservation area in accordance with the Decree of the Minister of Marine and Fisheries / KEPMEN KKP No. 24 of 2014. The development of these areas into tourist destinations and the number of seaweed pests and diseases has caused reduced number of farmers who grow seaweed. The data used was secondary data obtained from Department of Marine and Fisheries of Bali Province and field data was taken in February 2018. Landsat 8 imagery that has been corrected by Top of Atmosphere then lyzenga algorithm was included for correction of water columns and then classified the maximum likelihood with coordinate training area, which only classified seaweed classes. The area of seaweed in Nusa Penida using Landsat 8 imagery on February 2018 acquisition was obtained at 69.48 hectares with an accuracy rate of total seaweed of 85.34% and an accuracy of 63.22%. Whereas the estimated results that could potentially be produced in February 2018 were 89,321 tons.

COVER VOL 2 NO 1 admin JMRT
Journal of Marine Research and Technology Vol 2 No 1 (2019): FEBRUARI 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (371.169 KB)

COVER

Struktur Komunitas Dan Preferensi Habitat Makrozoobentos Pada Kondisi Padang Lamun Yang Berbeda Di Kawasan Pantai Sanur Bali Ketut Popi Anjani Devi; I Gusti Sila Dharma; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

The existence of macrozoobenthos in habitats is strongly influenced by physical and chemical conditions of water. One of the macrozoobenthos habitats is seagrass, the amount of seagrass cover and organic matter greatly influences the structure of the macrozoobenthos community. Seagrass in the Sanur Beach area grows on an 8 km stretch of beach stretching from Grand Bali Beach Hotel to Mertasari. In the Sanur Beach area, a lot of research refers to the association of macrozoobenthos in seagrasses and a description of the distribution of mollusca. This study aims to determine the macrozoobenthos community structure. This research was conducted in the Sanur beach area, namely at Segara Ayu Beach and Semawang Beach. In this study macrozoobenthos data collection was carried out by substrate retrieval, and aquatic environmental parameters. The highest species composition at the two stations came from the Cycloneritida sequence, the individual abundance at Segara Ayu beach was higher than Semawang Beach which was 0.024 ind/m3, this was thought to be due to higher seagrass density at Segara Ayu Beach than at Semawang Beach. Diversity index in both stations was classified as medium, high uniformity index, and low dominance index.

Kandungan Mikroplastik pada Saluran Pencernaan Ikan Lemuru Protolan (Sardinella Lemuru) Hasil Tangkapan di Selat Bali Cok Istri Yudhantari; I Gede Hendrawan; Ni Luh Putu Ria Puspitha
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Bali Strait is a waters region with the greatest potential for catching pelagic fish, one of which is lemuru (Sardinella lemuru). The quality of lemuru fish is thought to decrease due to the presence of plastic waste entering from the watershed and empties into the Bali Strait. The plastic waste will floating in the water column, which causes the plastic to be torn apart or degraded by sunlight and form plastic particles called microplastic. The size of microplastic that similar to phytoplankton and zooplankton allow lemuru to accidentally ingest the microplastic. The purpose of this study was to analyze the type of microplastic and calculate microplastic abundance in the digestive tract of lemuru fish (Sardinella lemuru) caught in the Bali Strait. This research was conducted from May to July 2018. Sampling was done by collecting fish landed at the Kedonganan Fish Landing Port. Sample analysis was carried out at the Laboratory of Marine Science, Faculty of Marine Science and Fisheries, Udayana University. The most common type of microplastic contained in the digestive tract of lemuru fish is fiber, which comes from synthetic materials in clothing and also fishing gear such as fishing rods or nets. Microplastic abundance in the digestive tract of lemuru protolan in this study was 1 particle/fish.

Kajian Pengembangan Budidaya Ikan Kerapu dan Rumput Laut di Perairan Timur Pulau Serangan Septi Novita Sari; I Dewa Nyoman Nurweda; Elok Faiqoh; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Grouper and seaweed are Indonesian fishery export commodities. One of the regions contributing to the production of groupers and seaweed is the northern waters of Serangan, Bali. However, over the past few years, the production of groupers and seaweed in the northern waters of Serangan has decreased. With these conditions, an effort is needed to increase the production of grouper and seaweed more optimally. One of these efforts is the expansion of area for the development of grouper and seaweed aquaculture in other places, because at present in the northern waters of the attack the condition is not conducive due to the dense sea traffic activities. One place to be used as a place to develop grouper and seaweed aquaculture is the eastern waters of Serangan because it is not too busy with sea traffic activities in the region. To see the potential of the eastern waters of Serangan, it is necessary to study the physical, chemical and biological parameters of these waters. Through the study of these water parameters, it aims to find suitable locations for the development of grouper aquaculture and the development of seaweed cultivation in terms of water quality. The results showed that, in the eastern and northern waters of Serangan, are 60% and 65.21% respectively of the condition of the waters is quite suitable to support the development of grouper aquaculture. Whereas, in the eastern waters of Serangan Island, at the north and central parts, about 64.8% of the condition of the waters is quite appropriate to support the development of seaweed cultivation. Suggestions that can be given through this research is that an economic and socio-cultural review is needed in the eastern waters area of Serangan as a place for developing grouper and seaweed aquaculture.

Struktur Komunitas dan Sebaran Bulu Babi (Echinoidea) di Kawasan Padang Lamun Pantai Serangan, Bali I Gede Panji Agung Purnomo; I Gusti Sila Dharma; I Nyoman Giri Putra
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Sea urchin is one of the biota that inhabiting coral reef and seagrass ecosystems. This spesies is commontly found in hard substrate, especially the substrate in seagrass beds which is a mixture of sand and coral fragments (Aziz, 1994). Sea urchins can be used as indicator organisms for water quality because sea urchins will become one of the first organisms to show signs of pressure (Yulianto, 2010). Serangan Island, geographically located in South Denpasar Subdistrict, Denpasar City, Bali Province which has a sediment in the form of coarse white sand mixed with coral fragments with high water activity. Based on the results of a study on the eastern coast of Serangan, sea urchins consisting of 5 species : D. setosum, E. diadema, E. calamaris, E. mattei, D. palmeri with dominanance species found is D. setosum sea urchins. Densities of sea urchins found in all stations was dominated by D. setosum with a total value sea urchin of 4.3 ind / m2 while the lowest density was in sea urchins of E. calamaris and E. diadema with a total value of 2.5 ind / m2 . Distribution pattern of sea urchins in Pantai Serangan, has a uniform distribution pattern (v < m) and clumped (v > m). D. setosum and E. matthei have uniform distribution with values of 0.29 and 0.21 while E. diadema, E. calamaris and D. palmeri have clustered distribution.

COVER VOL 2 NO 2 admin JMRT
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (339.418 KB)

Volume 2 No 2 AGUSTUS 2019

Kandungan Bahan Organik di Sedimen Pada Budidaya Abalon Haliotis squamata dengan Sistem Co-Culture di Pantai Geger Bali Ika Arofa Setiawati; I Gusti Ngurah Putra Dirgayusa; Ni Luh Putu Ria Puspitha
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Marine cultivation is increasing to meet market demand. One of Indonesia's aquaculture commodities is abalone (Haliotis squamata). Improvement of marine cultivation business should pay attention to the impact on the environment. Marine cultivation one of system that considers environmental sustainability is IMTA (Integrated Multi Trophic Aquaculture). The cultivation business gives effect to the water and sediment quality at the cultivation. The purpose of this research is to know whether there is difference of sediment organic matter in cultivation of abalon Haliotis squamata between before and after IMTA system. This research was conducted for 45days at Geger Beach, Badung regency, Bali. The method used in this research is Loss-on-ignition method. The results were analyzed by T-test using SPSS. The results of this research showed that the sediment organic matter before the cultivation process in the sediment was 29,1622% and after 45 days the cultivation process took place with an organic matter content of 31,0052%. The results of statistical analysis of the T-Test that sediment organic matter between before and after 45 days of cultivation process had no significant difference (P> 0.05).

Konsentrasi Klorofil-a dan Hubungannya dengan Pasang Surut di Selat Lombok Annassita Gianie; Yulianto Suteja; Widiastuti Karim
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

Lombok Strait is a strait located between Bali Island and Lombok Island that has a strong current and crossed by the main trajectory of Indonesian Throughflow (ITF). ITF is a current system that connects the Pacific and Indian Ocean. When mass water ITF passes through Indonesian waters, it mixes with other water masses, resulting in a mix of two water masses from two different oceans. These differences in water mass characteristics include temperature, salinity, DO, chlorophyll, and other tracers that can be used as an indicator of productivity. This can be determined based on the availability of chlorophyll-a concentrations. Chlorophyll-a is an active pigment in phytoplankton cells that has an important role on photosynthesis process. It is essential to know the temporal fluctuations of the chlorophyll-a concentrations at both high and low tide, and the correlation between chlorophyll-a and the water quality in the Lombok Strait. This research used primary data on chlorophyll-a and water quality parameter (DO, temperature, and salinity) and secondary data regarding tides on Port of Lembar. This research used CTD SBE 911+ as a measurement of instrument. The concentration of chlorophyll-a on CTD measurement of 0 m (0.011mg/l and 0.005) and for 10m of chlorophyll-a concentration (0.014mg/l and 0.006). The fluctuations of chlorophyll-a pattern during the tides showed that at low tide, the chlorophyll-a concentration is high, and vice versa. The chlorophyll-a was situated on a depth of 0 m and 10 m and was not affected by the water quality.

PEMETAAN LAHAN POTENSIAL BUDIDAYA LAUT IKAN KERAPU BEBEK Cromileptes Altivelis DI DESA PEMUTERAN, KECAMATAN GEROKGAK, KABUPATEN BULELENG, BALI Hendra Yoga Pratama; I Dewa Nyoman Nurweda Putra; Ni Luh Putu Ria Puspitha
Journal of Marine Research and Technology Vol 2 No 2 (2019): AGUSTUS 2019
Publisher : Department of Marine Sciences, Faculty of Marine Science and Fisheries, Udayana University

The potential of aquaculture in Indonesia is very large, especially fish and mollusks. Around 1.052.720 ha total potential sea area for fish cultivation such as snapper, beronang, and grouper. One potential that needs to be developed in the field of fisheries is duck grouper (Cromileptes altivelis). One area in Indonesia especially in Bali, which conducting marine aquaculture using floating net cage system is Pemuteran Village, Gerokgak District, Buleleng Regency, Bali. This study aimed to determine the right information and improve the potential of the tap nets for the activity of duck grouper at Pemuteran Village level can be done with floating net cage system. In this study three stages were carried out, namely interpolation, reclassification, and overlay. Based on the result of overlay of all spatial information, a potential map for the activity of duck grouper cultivation with KJA system is divided into 2 conformity classes, namely: S1 for the appropriate category (very suitable), S2 (quite appropriate category ) and T (for not suitable category). Based on the map in figure (3), it shows that suitable results for agriculture in Pemuteran village indicate that proper resources for aquaculture are in the right system KJA is Very suitable (S1) of 1,67 km2, quite appropriate (S2) of 6,25 km2 and not suitable (T) of 1,31 km2.

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