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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 18 Documents
 1   2 
Search results for , issue "Vol 6 No 1 (2020)" : 18 Documents clear
Kajian Kualitas Air Muara Sungai Musi Sumatera Selatan Wike Ayu Eka Putri; Melki Melki
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.p05

Abstract

The Musi River Downstream filled with a variety of activities that potential to cause degradation of environmental quality. This condition can be seen from the color of the waters that tend to be cloudy. This condition can be an indicator that there has been polluted. This study was aimed to explore information about the quality waters of Musi River Estuary from several chemical parameters. Water sampling was conducted in July 2011 at the Musi River Estuary which was divided into 7 research stations. The results showed that nitrate concentrations during tides and lows ranged from 0.01-0.0.9 mg / L, phosphate 0.13-0.14 mg L-1, TSS 30-185 mg L-1, ammonia 0.03-0, 11 mg L-1, TOM 9,48-18,96 mg L-1 and dissolved oxygen 3,32-11,60 mg L-1. Ammonia, dissolved oxygen and TOM parameters are still good and feasible for organism while nitrate, phosphate and TSS have exceeded the permissible threshold for marine life.
Struktur Komunitas Makroalga di Perairan Jemeluk dan Penuktukan, Bali Ni Wayan Ayu Astini Sari; I Dewa Nyoman Nurweda Putra; Widiastuti Widiastuti
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.p01

Abstract

This research was conducted at Jemeluk and Penuktukan water which have good marine resources with different environmental conditions. Jemeluk beach has reef flat zone and Penuktukan beach has reef slope zone. The aim of this research is to determin the comunity structure of macroalgae in Jemeluk and Penuktukan beach. The data of macroalgae comunity structure collected, use quadratic transect method with a size of 1x1 m placed following the line transect on the coral reefs with macroalgae along 25 meter. Identification of macroalgae using identification books from the Food and Agriculture Organization of the United Nation, The Living Marine Resources of the Western Central Pacific Volume 1: Seaweeds, Corals, Bivalves and Gastropods (FAO, 1998). The results showed that the percentages of macroalgae coverage in Jemeluk beach are found 6 genus of macroalgae with the highest percentage of coverage, density, and dominance of Halimeda (green algae). Simpson's dominance index in the Jemeluk waters is in a low dominance index and diversity is in the medium Shannon-Wiener diversity index. Furthermore Penuktukan beach found 5 genus of macroalgae with highest percentage of cover, density, and dominance by Gracilaria (red algae). Simpson's dominant index in this wates is in the low category and the macroalgae diversity from all stations was in the category of the medium Shannon-Wiener diversity index too.
Analisis Perubahan Luasan dan Kerapatan Tajuk Mangrove di Kecamatan Borong Kabupaten Manggarai Timur Mu'tasim Billah; I Wayan Arthana; I Wayan Restu; Abd. Rahman As-syakur
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.p06

Abstract

The ecosystem of mangrove is one of unique and distinctive forms of forest ecosystem, has high economic and ecological value, but has highly vulnerable to damage if it’s unwise in management. The information about area of mangrove forest in East Manggarai District was too limited. Therefore it needs an analysis of area and density changes of mangrove headings in East Manggarai District. The objective of this research is analyzing area and density changes of mangrove headings in Borong Subdistrict of East Manggarai District. The techniques of this research past supervised classification, NDVI analysis and field observation. The data analysis are correlation and accuracy test. Based on the image analysis, the ecosystem area of mangrove in Borong Subdistrict of East Manggarai District from 2007 till 2017 decreased by 20,61 hectares from 90.99 to 70.38 hectares. Declining also occurred in density of mangrove headings level, where density level was reduces to medium or rare. Result of the accuracy test obtained overall accuracy value was 82%. The density of mangrove headings on rarely classification has NDVI value of less than 0.3272, the medium has 0.3272 to 0.413 and the dense has more than 0.413. Based on the correlation analysis the value of density and NDVI form a linear regression model y = 233.2x – 26.304, with a very strong correlation (r) is 0.93. The decreasing area and density of mangrove caused by human activity that are harmful the existence of mangrove forest.
Simpanan Karbon pada Padang Lamun di Perairan Tanjung Benoa, Bali I Komang Agus Parnata; I Dewa Nyoman Nurweda Putra; Gede Surya Indrawan
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.p02

Abstract

Human activity is the biggest contributor to carbon dioxide (CO2) gas into the air. Coastal ecosystems that have the ability to absorb and store carbon over a relatively long period of time are seagrass beds. Seagrass is able to absorb carbon with an average of 0.21 tons / ha. Research on Carbon Deposits in Seagrass in Tanjung Benoa Waters, Bali was conducted in February 2019. Determination of the sampling point was done by purposive sampling method. This research uses the dry ashing method which is carried out by crushing the sample components at 500?C in an electric furnace. Seagrass species obtained in Tanjung Benoa waters are Cymodocea Serrulata, Cymodocea Rotundata, Thalassia hemprichii, Syringodium isoetifolium, Halodule pinifolia, Halophila ovalis and Halodule uninevis. The results showed the seagrass density of Tanjung Benoa waters, Bali was included in the sparse to dense category with density values ??ranging from 195-1252 stands / m2. The content of seagrass carbon at the bottom of the substrate (roots and rhizoma) is 86.421 grams of dry weight (gbk / m2), while the top of the substrate (leaves) is 33.774 grams of dry weight (gbk / m2). The carbon content at the bottom of the substrate is higher than the top of the substrate because at the bottom of the substrate is not too affected by environmental physical factors. where the highest carbon content is Thalassia hemprichii seagrass with a value of 625.36 gC / m², while the lowest carbon content is Halophila ovalis with a value of 89.91 gC / m².
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.
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.
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.
Struktur Komunitas Vegetasi Mangrove Berdasarkan Karakteristik Substrat di Taman Hutan Raya Ngurah Rai, Bali Ni Kadek Dian Prinasti; I Gusti Bagus Sila Dharma; Yulianto Suteja
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.p11

Abstract

Mangrove is a typical type of vegetation found in tropical beach areas. Mangrove forests as one of the potential natural resource that is utilized by the community. Excessive utilization of mangrove forest and not offset by rehabilitation will lead to a decrease in mangrove area which causes reduced mangrove function in the ecosystem. One of the factors affecting mangrove growth is soil or substrate. In general, mangrove forest areas are present throughout the Indonesian coast and are grown in locations that are still influenced by tidal activity. The largest mangrove forest destruction in Bali occurred in the area of Tahura Ngurah Rai, which is 253.4 hectares of total area of 1,373.5 hectares. The purpose of this research is to know the structure of the mangrove community based on the characteristics of the substrate at Taman Hutan Raya Ngurah Rai, Bali. Data collection using line transect method and analyzed quantitatively by using INP analysis. From five research stations, nine mangrove species are found, including Sonneratia alba, Rhizophora mucronata, Rhizophora apiculata, Bruguiera gymnorhiza, Bruguiera sexangula, Xylocarpus granatum, Avicennia lanata, Avicennia officinalis and Aegiceras floridium. The substrate component in TAHURA is dominated by sand followed by clay and mud. Species Sonneratia alba and Rhizophora apiculata are found in all types of substrates, Rhizophora mucronata species found in two substrate types, sandy loam substrates and sandy clay, but some species are found only in one type of substrate such as Xylocarpus granatum, Avicennia lanata, Avicennia officinalis, Bruguiera gymnorhiza and Bruguiera sexangular.
Logam Berat Timbal (Pb) pada Air dan Plankton di Teluk Benoa, Badung, Bali Ade Riestiari Sudarmawan; Yulianto Suteja; Widiastuti Karim
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.p16

Abstract

Benoa Bay is the center of estuary of the six rivers in Bali Island. One of the sources of pollution is the input from the river to the waters, especially the liquid waste from the textile industry that contains heavy metals particulary Lead. Moreover, Benoa Bay is a busy area with shipping activities. Shipping activities could direct and indirectly contaminate the waters with Lead from its oil waste. The purposes of this research are to examine the Lead concentration in the surface waters and plankton, and to determine lead bioaccumulation in plankton in the Benoa Bay. The samplings were conducted on May 2018. Lead concentration in the waters and plankton were analized using Inductively Coupled Plasma Emission (ICPE) with wet destruction method. The result shows that Benoa Bay is heavily contaminated by Lead. According to the Decree of the Minister Environment No. 51 of 2004 about Sea Water Quality Standards, concentration of lead in sea waters is <0.008 mg/L. Concentration of lead in Benoa Bay water surface is 0.001 to 0.053 mg/L and in plankton is 0.001 to 9.287 mg/Kg. It is found that the bioconcentration factor (BCF) of plankton is 593.45. This study emphasize that plankton are able to bioaccumulate Lead.

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