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Journal of Marine and Aquatic Sciences
Published by Universitas Udayana
ISSN : 23028114     EISSN : 25497103     DOI : -
Core Subject : Science,
Earth & Planetary 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.
Arjuna Subject : -
Articles 251 Documents
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Valuasi Ekonomi Terumbu Karang Pasca Penetapan Kawasan Konservasi Laut Sawu Di Kabupaten Kupang D. Umar Rahman; Fonny J. L. Risamasu; H. M. D. Pua Upa
Journal of Marine and Aquatic Sciences Vol 6 No 1 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i01.p03

Abstract

This research has been carried out in the Savu Sea Waters. The method used in data collection through interviews and questionnaires. Data collected and analyzed in this study are Direct Use, Indirect, Option, Existence and Bequest Value. The types of benefits identified and quantified are coral reef resources in the Savu Sea, especially those in Kupang Regency Coastal Area for Use Value, the Direct, Indirect, Option, Bequest, and Existence Value. Then a comparison is made between the direct value of coral reefs consisting of capture fisheries, aquaculture and tourism. While the value of indirect of coral reefs includes abrasion, carbon sink, fish nursery, spawning and Feeding Ground. And Non Use Value which consists of Option Value, Bequest, and Existence. The results of the analysis show that the value of direct is Rp. 218,027,971,623, 69 / year, indirect is Rp. 20,795,211,891.89 / year, option value is Rp. 3,967,284,324.32 / year, the existence is Rp. 4,121,520,000 / year, and the value of inheritance is Rp. 4,087,245,405.41. The highest Direct Use Value is in the form of capture fisheries value, while the lowest is in the form of aquaculture. Furthermore, for the economic value of Indirect as a Feeding Ground is the highest value compared to the others and the value of research benefits is the lowest. Meanwhile, the highest Non Use Value is the Existence and the lowest is the Bequest.
Pemeliharaan Larva Ikan Kerapu Sunu (Plectropomus Leopardus) Stadia Awal Pada Bak Berbeda Warna Ni Ketut Maha Setiawati; Regina Melianawati
Journal of Marine and Aquatic Sciences Vol 6 No 1 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i01.p04

Abstract

Warna bak pemeliharaan diduga berpengaruh dalam pemeliharaan larva ikan. Penelitian ini bertujuan mengetahui pengaruh perbedaan warna bak dalam pemeliharaan larva ikan kerapu sunu pada stadia awal, yang dimulai saat larva menetas sampai berumur 10 hari. Penelitian dilakukan menggunakan empat bak fiber volume 400 L. Perlakuan warna bak yang diuji adalah: Kuning (K), Biru (B), Putih (P) dan Hitam (H). Larva diberi pakan alami rotifer dan kopepod. Parameter yang diamati adalah tingkat keberhasilan pemeliharaan, sintasan, panjang total dan jumlah rotifer dalam pencernaan larva serta intensitas cahaya di permukaan air dan yang dipantulkan dari dalam air pada media pemeliharaan larva. Hasil penelitian menunjukkan bahwa tingkat keberhasilan pemeliharaan yang mencapai umur 10 hari pada perlakuan (K) dan (B) adalah 4 kali, sedangkan pada (P) 2 kali dan (H) 1 kali. Perbedaan warna bak tidak berpengaruh nyata (P>0,05) terhadap sintasan, yang masing-masing adalah 4,87±3,74% (K), 2,28±3,52% (B), 0,28±0,49% (H) dan 0,15±0,31% (P). Sebaliknya, perbedaan warna bak tersebut berpengaruh sangat nyata (P<0,01) terhadap panjang total larva pada umur 10 hari, dimana panjang total larva (H) dan (P) lebih besar dibandingkan (B) dan (K). Larva (P) memiliki jumlah rotifer yang terbanyak dalam pencernaannya, sedangkan larva (B) yang paling sedikit. Intensitas cahaya di permukaan air setiap bak berbeda warna tersebut tidak berbeda jauh. Namun, intensitas cahaya yang dipantulkan dari permukaan air media pemeliharaan pada bak (K) dan (P) memiliki intensitas yang lebih tinggi dibandingkan pada bak (B) dan (H). Berdasarkan hasil penelitian tersebut, bak dengan warna kuning sangat direkomendasikan bagi pemeliharaan larva ikan kerapu sunu stadia awal.
Fluktuasi Total Padatan Tersuspensi (Total Suspended Solid) dan Kekeruhan di Selat Lombok Boiris Benet Sinaga; Yulianto Suteja; I Gusti Bagus Sila Dharma
Journal of Marine and Aquatic Sciences Vol 6 No 2 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i02.p11

Abstract

Total suspended solid is particles or living components (biotics) such as phytoplankton, zooplankton, bacteria, fungi, or dead components (abiotics) such as detritus and solids (sand, mud, and clay) suspended in water.. Total suspended solids are related to turbidity. Therefore, turbidity and total suspended matter can be used as water quality parameters that can determine whether the water conditions are good or not. The Lombok Strait is semi-closed waters that are influenced by local influences such as input from the river. This will certainly affect the total suspended solids found in the Lombok Strait waters. This research was conducted in November 2017. Field sampling was carried out in the Lombok Strait waters at the point of 116 ° 1'18 "BT, 8 ° 34'12" LS. The sampling time is carried out for 1 x 24 hours, starting on November 3 until the November 4, 2017. From the results obtained, TSS on the Lombok Strait Waters has fluctuated. The highest TSS concentration was found at a depth of 0 when the tide conditions were heading to recede. The lowest TSS concentration is obtained when low tide heading to high tide. Turbidity concentration values ??at 5 - 10-meter depths ranged from 0-0.2 NTU. Turbidity and total suspended solids are different in each depth. The vertical pattern of turbidity distribution in this study shows significant results between the surface and bottom of the water. The value of turbidity decreases with increasing depth and time.
Accumulation Of Heavy Metal Lead (Pb) And Cadmium (Cd) In Halophila ovalis And Thalassia hemprichii As Agents Of Phytoremediation In South Serangan I Ketut Budiarta; Elok Faiqoh; I Gusti Ngurah Putra Dirgayusa
Journal of Marine and Aquatic Sciences Vol 6 No 2 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i02.p2

Abstract

Seagrass ecosystem is part of the marine ecosystem that has quite important ecological role. Halophila ovalis and Thalassia hemprichii are seagrass species have the potential to become an agent of phytoremediation by determining the concentration of heavy metals Pb and Cd that have accumulated in them. This study was conducted in January 2018 in Southern Serangan Beach. The purpose of investigating the concentration of heavy metals in water, sediments, roots and leaves of seagrass and determine the bioaccumulation, translocation character and can be made as an agent for phytoremediation. The method used is purposive random sampling method, determined by 3 point. The point is determined from the condition closest to the port Benoa to the outermost point the bay mouth. Determination of station points is considering the presence of the most seagrasses. Results obtained in this study obtained average Pb concentration in water 0.0521 ppm, average metal Cd 0.1652 ppm, the average sediment Pb 75.8574 ppm, Cd 15.33593 ppm, concentration of Pb and Cd in roots and leaves of H. ovalis and T. hemprichii respectively Pb 42.4940 ppm, 45.5334 ppm, and 35.6207 ppm, 38.3931 ppm. Metal Cd 12.9708 ppm 14.8581 ppm Bioaccumulation value of seagrass is accumulator plants. Value of Pb and Cd translocation factors in seagrass H. ovalis (phyto-extraction) seagrass T. hemprichii Pb (phyto-extraction) and Cd (fitostabilization) phytoremediation values by both types of seagrass are greater in remediating heavy metal cadmium, meaning that both types of seagrass are better used for phytoremediation agents of heavy metal cadmium.
Potensi Sumberdaya Lamun Untuk Mendukung Pengembangan Wisata Di Pantai Mengiat Nusa Dua, Bali Ida Ayu Novera Wandiani; I Wayan Restu; Made Ayu Pratiwi
Journal of Marine and Aquatic Sciences Vol 6 No 1 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i01.p10

Abstract

Seagrasses have functions and roles as primary producers, biota habitats, bottom seawater stabilizers, sediment catchers, and nutrient recyclers. With the function of seagrass as a habitat of biota, it can provide economic opportunities to be utilized as a marine tourism, especially marine ecotourism. Marine ecotourism is a concept of sustainable use of coastal resources with environmental service system that prioritizes coastal natural resources as an object of service. This study aimed to identify the seagrass potency ecologically and socially and to formulate the seagrass management strategies to support tourism development in Nusa Dua. This study was conducted from January-March 2017 using observation and interview method. Observation method was used to define the condition of seagrass, fish species, and environmental parameters. Then Interview method was used to know social conditiion of Mengiat Beach and analyzed by SWOT to formulate the seagrass management strategies. The result showed, there were 6 species, i.e., Halophila ovalis, Cymodocea Halodule pinifolia rotundata, Syringodium isoetifolium, Thalassia hemprichii, and Thalassodendron ciliatum. The percentage of seagrass coverage at 5 stations tend to be low (5,639%-47,49%). Based on Tourism Suitability Indexes, Mengiat Beach in Nusa Dua is suitable (S2) for tourism activities with value 75,08%. The priority strategies are formulated from the SWOT matrix is applying under water garden in seagrass base on tourism planning.
Keanekaragaman Vegetasi Akuatik di Peraian Danau Batur, Kintamani, Bangli I Made Hendy Wesha Suryawan; Pande Gde Sasmita Julyantoro; Gde Raka Angga Kartika
Journal of Marine and Aquatic Sciences Vol 6 No 2 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i02.p16

Abstract

Batur lake is an aquatic natural resource that has a very important value in terms of ecological functions and economic functions. Batur lake gets pressure due to discharges of various types of waste generated from plantation activities, community settlements, cultivated feed residues in floating net cages, tourism activities and water transportation waste. It can cause ecosystems disruption in Batur lake, especially on the aquatic vegetation. This study aims to determine the species diversity and the influence of community activities on aquatic vegetation in Batur lake. This research was conducted from February to March 2017 at Batur Lake using quantitative descriptive method. Sampling was conducted at five stations by taking data and samples of aquatic vegetation, measuring water quality (temperature, pH, DO, clarity and turbidity) and water samples for testing nitrate, phosphate and sulfide acid content. The aquatic vegetation species that found were seven types, namely Alternanthera philoxeroides, Persicria decipiens, Phragmites australis, Eicchornia crassipes, Ceratophyllum demersum, Pistia stratiotes and Azolla pinnata. The value of diversity is in the low category. Uniformity of aquatic vegetation in Lake Batur waters ranged from 0.62257 - 0.874. The dominant value ranges from 0.22435 - 0.61563. The highest density values were found in species of Alternanthera philoxeroides at station II with 880 ind/m2 and 40 ind/m2 of Persicaria decipiens as the lowest density species. The water quality parameters give a significant influence on the growth of aquatic vegetation in Batur lake waters.
Pemodelan Pergerakan Mikroplastik di Selat Bali I Gede Dananjaya Bagaskara; Yulianto Suteja; I Gede Hendrawan
Journal of Marine and Aquatic Sciences Vol 6 No 2 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i02.p7

Abstract

The Bali Strait has an important role for the coastal society of East Java and Bali, because as a supplier of lemuru fish. However, the quality of lemuru fish is decrease due to the presence of plastic waste that flow into the Bali Strait. Plastic is a material that’s difficult to decompose, but by using oxidation or mechanical processes causing plastic break to micrometer. Microplastic will be more easily eaten and have a direct impact on the food chain and cause morphological damage or chemical effects that carried by plastic. Based on these problems, its important to conduct research on spatial and temporal microplastic movements in the Bali Strait. However, the wide area of the Bali Strait and the amount of time needed to collect data in the field directly, numerical modeling method was use to solve this problem by using the Finite Volume Ocean Coastal Model (FVCOM) modeled in 3-D and microplastic divided into 3 sizes (0.3 mm, 1 mm, 5 mm). Spatially the movement of microplastic with a size of 0.3 mm, 1 mm, and 5 mm has a relatively similar movement, but has different position based on depth. Temporally the highest total number of microplastic sites is in the potential area of Blimbing Sari catching in the third week, and the potential area for catching Bukit on second week. Whereas in the potential areas of capture Senggrong, Anyir, Watu Anyir and Pang-Pang Bay were not found microplastic.
Optimalisasi Biomassa Alga Hijau Ulva sp. Sebagai Biosorben Logam Berat Cr(VI) Anisa Dea Novianti; I Wayan Gede Astawa Karang; I Nyoman Giri Putra
Journal of Marine and Aquatic Sciences Vol 6 No 1 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i01.p15

Abstract

Heavy metals are dangerous pollutants because it can’t be degraded by organism or can’t accumulated in environment. Heavy metals can settles at the bottom of the waters. One of the dangerous heavy metals is Hexavalent Chromium or Cr(VI). Research on reducing heavy metal pollution is important, there are many methods that can be use to reduce heavy metal. Biosorption one of the methods which is effective and efficient for reducing heavy metal pollution because the biomaterials or biosorbent used is able to absorb metals. The purpose of this research was to determine the optimum conditions for green algae which is Ulva sp. to adsorb Cr(VI) metal ions. Utilization of algae Ulva sp. as a biosorbent can help to reduce ecological problems due to algae that can bloom and also it can minimize pollution of heavy metals Cr(VI). Based on the results of the research the optimum conditions for biosorption of Cr(VI) by Ulva sp. influenced by several parameters such as pH, biosorbent dosem initial Cr(VI) concentration and contact time. In this research the most optimal conditions for the biosorpstion of Cr(VI) using Ulva sp. as a biosorbent is at pH 2, the mass of biosorbent 10 gr, initial concentration of Cr(VI) 4 mg/L for 90 minutes. The maximum efficiencies of Cr(VI) removal was 98,88% and capacity for absorb was 0,093 mg/g.
Perbandingan Produktivitas Pancing Ulur (HandLine) Dan Jaring Insang (Gill net) Nelayan Desa Kusamba, Klungkung, Bali Terhadap Hasil Tangkapan Ikan Tongkol (Auxis sp.) Pande Chrisna Aryasuta; I Gusti Ngurah Putra Dirgayusa; Ni Luh Putu Ria Puspitha
Journal of Marine and Aquatic Sciences Vol 6 No 2 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i02.p12

Abstract

This study uses two environmentally friendly fishing gears namely gill net and hand line. The length of one set of hand line is 100 m and the length of one set of gill nets is 250 m. The purpose of this study was to determine the number of catches, species composition of catches and the efficiency of fishing gear that provided benefits for the fishermen of Kusamba Village. This data collection was carried out in field plunge directly with fishermen using the one day trip method for 35 trips during the tuna fishing season by Kusamba Village fishermen. Auxis sp is one type of fish that is the main target of the catch of fishermen in Kusamba Village. Auxis sp often follows the current circulation, the catch of Auxis sp on the fishermen of Kusamba Village has a different amount of production every day. In terms of Auxis sp catches by Kusamba Village Fishermen who use two fishing gear are dominated by gill nets and the quality aspect is dominated by hand linecatches. It is known that there are two types of tuna, namely Auxis rochei and Auxis thazard. The catch is in principle the output of fishing activities, while the effort needed in principle is an input from the fishing activities, fisheries production in an area has increased or decreased can be seen from the results of CPUE. The highest CPUE value of gill nets is 53.75 tails / effort, the highest CPUE value of hand line is 75 tails / effort.
Pengaruh Suhu Permukaan Laut terhadap Hasil Tangkapan Ikan Cakalang (Katsuwonus pelamis) di Perairan Selat Bali I Gusti Agung Gede Bayu Gita Damara; I Gusti Bagus Sila Dharma; Yulianto Suteja
Journal of Marine and Aquatic Sciences Vol 6 No 2 (2020)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/jmas.2020.v06.i02.p3

Abstract

This study aims to examine the effect of sea surface temperature on the skipjack tuna catch (Katsuwonus pelamis) in the waters of the Bali Strait. The waters of the Bali strait are selected by the authors because the waters of the Bali strait have the potential of catching tuna fish is high. The research is measured by using regression polynomial method of order 2. With the results of this study found from the sea surface temperature data in the results of the average - the average year 2011 - 2015 where the highest value is in March at 30.240C and the lowest in September of 25.870C. For skipjack catch data in 2011 - 2015 where the lowest weight in June was 4. 590 kg, while the highest weight in July was 61,367 kg, and beside that the result of regression 2nd polynomial regression was obtained with R = - 0.60 which has a strong meaning is inversely proportional or in other words sea surface temperature does not affect the catching of skipjack tuna in the waters of bali strait because in addition to sea surface temperature factors other indicators such as chlorophyll, depth, and oceanographic factors also affect the catch skipjack tuna in the waters of the bali strait.

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