Journal of Marine and Aquatic Sciences
Journal of Marine and Aquatic Sciences (JMAS) adalah peer-reviewed, open access journal, diterbitkan oleh fakultas Kelautan dan Perikanan, Universitas Udayana. JMAS menerbitkan hasil peneitian original dan review artikel dalam bidang ilmu kelautan, manajemen sumberdaya perairan, dan aplikasi remote sensing di bidang kelautan dan perikanan.
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<![CDATA[Peringatan Dini Keberadaan Arsen (As) pada Air dan Sedimen di Hilir Sungai Tukad Badung, Bali ]]>
<![CDATA[Alfi Hermawati Waskita Sari]]>;
<![CDATA[I Wayan Darya Kartika]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p04
<![CDATA[Tukad Badung is a large river in Bali that crosses Denpasar City which is densely populated and has a variety of activities: household activities, agriculture, animal husbandry, hotels, hospitals and industry. These various activities result in the entry of various heavy metals into the river water, including Arsenic (As), which eventually settles in the sediment. Arsenic has high toxicity and is included in Endocrine Disrupting Chemicals (EDCs). Information related to the presence of Arsenic in waters and sediment is very necessary to prevent its negative impact on ecosystems and human health. This research method is descriptive. Arsenic was 0.769 mg/L at point I, was not detected at points II and III, while at point IV Arsenic was measured at 0.081 mg/L. Arsenic (As) at point I and IV exceeded the threshold set based on PP number 82 of 2001 concerning Water Quality Management and Water Pollution Control, because it measured > 0.05 mg/L. The content of Arsenic (As) in downstream river sediment Tukad Badung, taken at point IV, measured 22.895 mg/kg; this value has also exceeded the threshold.]]>
<![CDATA[Aplikasi Teknologi Drone Sebagai Pelengkap Data Survei Lapang Untuk Pemetaan Ekosistem Terumbu Karang Menggunakan Citra Worldview-2 ]]>
<![CDATA[Ayub Sugara]]>;
<![CDATA[Amelia Suryanita]]>;
<![CDATA[Alfiqi Maulana]]>;
<![CDATA[Ari Anggoro]]>;
<![CDATA[Vincentius P. Siregar]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p05
<![CDATA[Coral reefs are one of the important ecosystems that need data inventory in order to manage marine resources both spatially and temporally. Remote sensing with drone technology is one of the vehicles for collecting data related to coral reef ecosystems in real time. Along with the times, drones are widely used in research both in terrestrial and in coastal areas. This research was conducted on December 4 – 10, 2018 in the Karang Lebar, Seribu Islands, Jakarta. The purpose of this research was to explored the ability of drones as a vehicle to complement field survey data for coral reef mapping. In addition, conducting a pixel-based analysis for coral reef classification based on WorldView-2 satellite imagery using field survey data and additional data from drone data. Based on the results of the study, information was obtained that drone imagery can help visual interpretation in detecting coral reefs. Thus, field survey data that are not covered in the research area can be assisted by the use of drones as a complementary vehicle for field survey data. The coral reef classification process using WorldView-2 imagery can be mapped well. Drone imagery has proven to be an alternative in field data collection as a training area in identifying coral reef objects, such as with massive coral lifeforms that can be clearly seen from drone images. It's just that visual interpretation is limited because of the water column, making it difficult to identify objects.]]>
<![CDATA[Respon Imun Ikan Nila (Oreochromis niloticus) Yang Terinfeksi Bakteri (Aeromonas hydrophila) Dengan Penambahan Vitamin C Pada Pakan ]]>
<![CDATA[Dewa Ayu Angga Pebriani]]>;
<![CDATA[Ni Putu Putri Wijayanti]]>;
<![CDATA[Putu Eka Sudaryatma]]>;
<![CDATA[Octovianus Octovianus]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p01
<![CDATA[Tilapia (Oreochromis niloticus) is one of the freshwater fish commodities with important economic value. However, in tilapia aquaculture, the emergence of disease was one of the problems that affect the quality and quantity of aquaculture production. One of the diseases that often appears was infection with Aeromonas hydrophila bacteria. This problem is expected to be overcome by giving vitamin C in fish feed. Through the provision of vitamin C, it will be able to increase the fish's immune system which is directly related to the fish's ability to prevent or treat disease attacks that arise, especially from Aeromonas hydrophila bacteria. The aim of this study was to determine the response of vitamin C to the immune system of fish infected with Aeromonas hydrophila so that the best dose was known that could be applied in the treatment of Aeromonas hydrophyla bacteria attack. The study was conducted using an experimental method with a completely randomized design (CRD) consisted of 2 controls, namely positive control and negative control, and 3 treatments with different doses of vitamin C. Based on the hematological test, the results showed that the content of white blood cells, red blood cells, and hemoglobin were still in the normal range for all treatments. Treatment E with a dose of 450 mg/kg vitamin C was able to increase the immune system of tilapia infected with Aeromonas hydrophila bacteria, shown from the content of white blood cells, red blood cells and hemoglobin in the highest treatment E compared to other treatments.]]>
<![CDATA[Bioakumulasi Timbal (Pb) pada Bivalvia (Anadara antiquata, Anadara granosa dan Perna viridis) dari Perairan Lekok, Pasuruan ]]>
<![CDATA[Devi Ulinuha]]>;
<![CDATA[Ima Yudha Perwira]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p02
<![CDATA[Lead is one of inorganic material causes pollution in waters that have a high level of toxicity for organisms. Lead pollution in waters can be accumulated by several water organisms, such as Bivalves. Bivalves are type of shellfish that can accumulate heavy metals. This study aimed to know the bioaccumulation of Lead on the Bivalves (Anadara antiquata, Anadara granosa dan Perna viridis) found in Lekok water (Pasuruan, Jawa Timur). The amount of Lead in the water, sediment and Bivalves was measured by using Atomic Absorption Spectro-photometer (AAS). The bioaccumulation of Lead on the Bivalves was analyzed by using Bioconcentration Factor (BCF). The result showed that amount of Lead in the water and sediment were 0,356 mg/L and 21,245 mg/kg, respectively. The BCF value of Lead on the Bivalves of Lekok waters were <30 indicating low accumulation level.]]>
<![CDATA[Pertumbuhan Ikan Tongkol Abu-Abu (Thunnus tonggol Bleeker, 1851) yang Tertangkap di Perairan Selat Bali ]]>
<![CDATA[Made Ayu Pratiwi]]>;
<![CDATA[Gde Raka Angga Kartika]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p03
<![CDATA[Longtail Tuna (Thunnus tonggol) in the waters of the Bali Strait is a by-catch fish, so that information on this fish resource was still very lacking and its management of longtail tuna was often neglected. The aimed of this study is to predict the signs of the unsustainability of longtail tuna resources based on growth aspects which include the distribution of length frequency, estimation of age groups, growth patterns and growth parameters. Data collection was carried out from December 2018 to February 2019. The growth pattern estimated by relationship of length and weight, cohort was identified using an analytical model based on the FISAT program (FAO I-CLARM Stock Assessment Tools) and growth parameters were analyzed using the Von Bertalanffy growth model. It can be seen that, the catch is dominated by the size of the fish that have matured gonads or adults (69% females and 73% males). The growth pattern of female and male of longtail tuna is negative allometric (length growth is more dominant than weight). So it can be assumed that there is an inconvenience in environmental conditions and competition in fighting for food and space in the waters of the Bali Strait.Longtail tuna had asymptotic length values of 784.71 mm (female) and 738.04 mm (male) with growth coefficients of 0.13 (female) and 0.18 (male). The growth performance inteprated as quite high when compared to other waters in Indonesia.]]>
<![CDATA[Karakteristik Sosial Ekonomi Nelayan Pemanfaat Hiu Tikus (Alopiidae) di Manggis, Karangasem, Bali ]]>
<![CDATA[Hanifa Miranda I.H. Putri]]>;
<![CDATA[I Wayan Arthana]]>;
<![CDATA[Elok Faiqoh]]>;
<![CDATA[Ranny R. Yuneni]]>;
<![CDATA[Yuniarti K. Pumpun]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p14
<![CDATA[Thresher sharks are known to have substantial economic value. They are caught globally as target and as bycatch in tuna fisheries. Due to their declining population, they are listed as an appendix II species on CITES, therefore any form of trade and fisheries related to the species have been nationally and internationally regulated. However, information on thresher shark fisheries in Bali is still limited. This study aims to socio-economically characterize thresher shark fishermen in Manggis, Karangasem. The research was conducted in August 2020 – October 2020 by interviewing 53 out of 119 recorded shark fishermen using a structured questionnaire. Shark fishermen use surface longlines to catch thresher sharks (Alopiidae) in between 3 areas, North Nusa Penida-Karangasem, east Nusa Penida and Bangko-Bangko. The fishermen catch sharks exclusively during the months of June-October and catch tuna the rest of the year. Operational costs for 1 boat ranges between Rp 121.000 – Rp 250.000 during 1 round trip. The income generated from shark fishing each trip averages to about Rp 627.714 per boat. Prior to the Covid-19 pandemic, some of the fishermen work jobs in the tourism sector. However, due to the pandemic’s impact on tourism, they have no choice but to be fishermen full time. Although thresher shark fisheries in Manggis are generally small scale, conservation and management strategies need to be implemented to ensure sustainable use of shark resources.]]>
<![CDATA[Keragaman Genetik Penyu Lekang (Lepidochelys olivacea) Dan Kaitannya Dengan Pola Arus Di Perairan Samudera Hindia Dan Perairan Tengah Indonesia ]]>
<![CDATA[Samsul Bahri]]>;
<![CDATA[Hawis H. Madduppa]]>;
<![CDATA[Agus S. Atmadipoera]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p10
<![CDATA[Indonesia is an important habitat for olive ridley (Lepidochelys olivacea) that it is necessary for sustainable management with respect to biological and ecological aspects as well as its environment. Genetic diversity and connectivity of L. olivacea can be calculated by using mitochondrial DNA analysis approach. The water circulation pattern are greatly affects to the distribution of L. olivacea that can be a transport medium for its migrations. This study aims to determined the genetic diversity of L. olivacea and its relation to water circulation across western and center of Indonesian waters. Samples of L. olivacea were collected in 6 locations across western and center of Indonesian waters from August 2015 to December 2016. The molecular analysis was conducted on control region gen based on 791-bp fragment. The water circulation analysis was performed through INDESO data and visualized by using Ferret software. Phylogenetic analysis showed that there are population connectivity of L. olivacea between western and central Indonesian waters. While population of L. olivacea in Kapoposang Island tend to be different compared to other populations. Genetic diversity analysis showed that L. olivacea from western Indonesia are more higher than center Indonesia. The water circulation analysis suggests that there is an established connection between western and center indonesian waters that connected by Northwest and Southeast seasons current, which the current vector indicates the movement of alternating water throughout Aceh, Pariaman, Panggul, Serangan, Kapoposang Island and Tuafanu populations.]]>
<![CDATA[Regenerasi Jaringan pada Ikan Kerapu Cantang (Epinephelus fuscoguttatus lanceolatus) yang Terpapar Limbah Deterjen Melalui Perendaman Ekstrak Padina australis dengan Dosis Berbeda ]]>
<![CDATA[Farah Diba Sani]]>;
<![CDATA[Marcelien Dj. Ratoe Oedjoe]]>;
<![CDATA[Ade Yulita Hesti Lukas]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p15
<![CDATA[Padina australis has bioactive compounds as antimicrobials in the form of phenols and their derivatives (flavonoids) which can inhibit the growth of bacteria that interfere with the function of the cytoplasmic membrane and can prevent spoilage and damage by microorganisms. This research was conducted from October to November 2022 at the Faculty of Animal Husbandry, Maritime Affairs and Fisheries, Nusa Cendana University, Kupang. The purpose of this study was to determine how many doses of Padina australis were effective in treating skin, gill and liver tissue damage of cantang grouper (Epinephelus fuscoguttatus lanceolatus) exposed to detergent. The method used is an experiment with a completely randomized design (CRD) with 3 treatments and 3 replications. The treatments used were control without detergent and Padina australis, 0.25g/l detergent and treatment with Padina australis with doses of 0.5%, 1% and 1.5%. The fish used was grouper cantang (Epinephelus fuscoguttatus lanceolatus) with a size of 8-9 cm. Treatment was done by soaking the fish for 10 minutes with the extract for 3 consecutive days. The fish were then fixed with 95% alcohol solution for further histology. The results showed that the administration of Padina autralis effect on changes in the histology of the skin, gill, and liver of cantang grouper. Changes that occur in the skin in the form of degeneration of vacuoles, in the gill lamellae hemorrhage occurs and the liver undergoes vacuole degeneration and necrosis. The best dose is found in the 1.5% treatment but it has not been effective in treating liver tissue.]]>
<![CDATA[Deteksi Pola Sebaran Tumpahan Minyak (Oil Spill) Menggunakan Citra Sentinel-1A di Perairan Karawang ]]>
<![CDATA[Fernanda Nadia Damayanti]]>;
<![CDATA[I Dewa Nyoman Nurweda Putra]]>;
<![CDATA[I Wayan Nuarsa]]>;
<![CDATA[Maryani Hartuti]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p06
<![CDATA[In recent years, oil spill accidents very often occur due to the development of sea transportation and oil exploitation. Increased exploitation of oil resources is a concern for oil spills that are very harmful to marine ecosystems. On July 12 2019, there was a well kick in the well reactivation YYA-1 owned by PT. Pertamina Hulu Energi work area Offshore North West Java (ONWJ) in Karawang Sea. The oil spill were spread up to Banten and continued to spread widely. Remote sensing is one of the methods that can be used to detect and monitor the oil spill by quickly viewing the location and spill points, and the pace and direction of the oil that can be utilized for cleaning. This research aims to determine the detection of oil spill using Sentinel-1A imagery and to determine oil spill patterns in Karawang Sea before spills occur until the well YYA-1 was closed that was on October 7 2019. This detection is done with adaptive threshold algorithm through Sentinel applications platform (SNAP). The results showed that oil spill has a trajectory spread pattern at the beginning of the spill which occur on July 18 2019. After July 18th, the spread pattern turned random and interrupted the spreading process. The spread has an estimated spread area of 145.85 km2. The spread of oil spill moved towards the northwest to the west approaching the coast and further away from the source of the spill, to Pandjang Island, Banten.]]>
<![CDATA[Karakteristik dan Distribusi Spasial Bahan Organik Pada Sedimen Dasar Perairan Teluk Pacitan Jawa Timur ]]>
<![CDATA[Alindya Eka Puspita Dewi]]>;
<![CDATA[Zainul Hidayah]]>;
<![CDATA[Akhmad Farid]]>;
<![CDATA[Dwi Budi Wiyanto]]>
<![CDATA[ Journal of Marine and Aquatic Sciences Vol 8 No 2 (2022) ]]>
Publisher : <![CDATA[Fakultas Kelautan dan Perikanan Universitas Udayana ]]>
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DOI: 10.24843/jmas.2022.v08.i02.p11
<![CDATA[Pacitan Bay is one of the semi-enclosed waters on East Java's south coast. This area is well-known for having a large fishing port as well as a beach tourism area. The dynamics of Pacitan Bay's waters due to the influence of currents, waves, and the input of water masses from the mainland are thought to affect the characteristics of the waters' bottom sediments. The objective of this study was to map the characteristics of bottom sediments and the distribution of organic substance. This research also analyzed the relationship between sediment characteristics and the concentration of organic subtance in the sediment. The sediment's characteristics were determined using granulometric analysis, and the organic matter content was determined using the Loss of Ignition (LOI) method. The analysis results show that sandy substrates dominate the bottom sediments of Pacitan Bay by an average of 82.22%. The distribution of sandy substrate dominates the bay's north and west. Distance from the shoreline has a significant effect on organic subtance distribution (One Way ANOVA, F = 6.05; p 0.05). The organic matter content of sediments dominated by sand is lower (R2 = 0.76) compared to substrates with softer grain size (silt or mud) and tighter pores, making organic matter efficient to precipitate.]]>
