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
-
Editorial Address
-
Location
Kota denpasar,
Bali
INDONESIA
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
 12   13   14   15   16 
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.
Percampuran Turbulen Di Tenggara Samudera Hindia Saat Siklon Tropis Marcus Menggunakan Data ARGO Float Muhammad Hafidz Ibnu Khaldun; Yuli Naulita; Alan Frendy Koropitan
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.p17

Abstract

Tropical cyclones are a phenomenon that occurs because of the interaction between oceans and atmospheric circulation. The southeastern Indian Ocean is one of the areas that has a high activity of tropical cyclones. Tropical cyclones that cross waters can result in mixing of water masses. The mixing process produces water mass entrainment between lower and upper layers which decreases temperature in the upper layer. The purpose of this study was to estimate the strength of turbulent mixing caused by tropical cyclones using Argo Float data. The result of this study shows the turbulent mixing caused by tropical cyclones was very strong in the surface layer. Turbulent mixing is not found before the cyclone and increases when the cyclone occurs. The increase in turbulent mixing was recorded at a depth of 50 m which had an energy dissipation value ranging from 6.86x10-8 - 1.93x10-4 W/Kg and a turbulent mixing value with a range of 1.0x10-3 - 2.51x10-1 m2 s-1. This study concluded that the turbulent mixing in the surface layer is caused by tropical cyclones which is the main factor triggering the increase in the dissipation of kinetic and turbulent energy at the sites.
Efektifitas Umpan Tiruan yang Berbeda Warna Terhadap Hasil Tangkap Ikan tongkol (Euthynnus sp) di Perairan Tenggara Karangsem Bali I Kadek Dedy Antara Putra; I Wayan Gede Astawa Karang; Elok Faiqoh; Abd. Rahman As-syakur
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.p8

Abstract

Catching Tuna Fish (Euthynnus sp.) in territorial waters of Southeast Karangasem, Antiga Kelod Village using trolling is very influenced by the type of baited. In a manner line, there are two type of baited that used for trolling, fishworm and lure. The objective of this research is to determine the effectiveness and the effect of lure on tuna fish catch (Euthynnus sp.) In territorial waters of Southeast Karangasem, Antiga Kelod Village. All of three baits are made about the size of the baits and have the same color, there are blue-white, red-white, and green-white, and it’s operated simultaneously on one unit trolling line for 12 times . This research using descriptive comparative analysis and complete randomized design statistic analysis (RAL). The results of this research obtain, the blue-wait color of the bait can produce 146 tuna fish (Euthynnus sp.) with an effectiveness value 34.27%, with average value of results catch is 12 tails on once trip. While for red-white color, produce 220 tuna fish with an effectiveness value 51.64%, and the average value of results catch is 18 tails on once trip, and the produce of green-white color is 60 tuna fish with effectiveness value 14.08%, the average outcome catch 5 tails on once trip. Based on the results of the research The red-white bait was a bait with the highest catch and the highest effectiveness value.
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.
Pengaruh Indian Ocean Dipole (IOD) Terhadap Produksi Penangkapan Ikan Lemuru (Sardinella lemuru) di Perairan Selat Bali I Dewa Gede Alit Sujana; I Dewa Nyoman Nurweda Putra; Ni Luh Ria Puspitha
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.p07

Abstract

Indonesia is one of tropical country which is very vulnerable to extreme phenomena in its water, such as Indian Ocean Phenomena (IOD) that occurred in Indian Ocean. The Bali Strait is directly adjacent to the Indian Ocean in the south area. Bali Strait is a region in Indonesia that has a high potential fishery resources namely, lemuru (Sardinella lemuru). The purpose of this study is to observe correlation and influence of IOD on lemuru production in Bali Strait between 2012 - 2016. The data used in this research are lemuru data was collected from 3 fish landing base namely PPP Muncar, PPN Pengambengan and PPI Kedonganan and IOD data used Dipole Mode Index (DMI) monthly from 2012 – 2016. The calculation used correlation equation, regression of second order polynomial. The highest lemuru production during 5 years, from 2012 untill 2016 was in 2015, accounted of 27,144,784 kg and the lowest production was in 2012 accounted of 5,644,146 kg. Based on that results, the highest yield of lemuru in the transition period II (September - November) of 31,938,833 kg with an average yield of 2,129,256 kg and the lowest was in east season (June - August) of 9,216,230 with average yield of 614,415 kg. The influence of IOD Index with lemuru production in Bali Strait has a determination value (R2) of 0.0558 and has a correlation of 17.40% with a positive influence (directly proportional). It was categorized as very weak.
Sebaran Fraksi dan Jenis Sedimen Dasar (Bed-Load) di Sungai Pawan Kecamatan Delta Pawan Kabupaten Ketapang Tuti Nursiani; Yoga Satria Putra; Muhardi Muhardi
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.p13

Abstract

Pawan River is the longest river in Ketapang Regency which has been silting due to sedimentation in the riverbed. A study on sediment transport in areas with potential siltation needs to be conducted. This purpose of tis study was to identify the distribution and types of bed-load in the area by using the hydrometer method. This study was conducted at five locations, and each location was conducted three measurement points. The results showed that the types of bed-load were clay, silty clay, clay loam, loam, silt loam, sandy loam, loamy sand. While, the distribution of sediment fraction were sand (0.05 - 2 mm) of 32.07%, silt (0.002-0.05 mm) of 42.60%, and clay (<0.002 mm) of 24.87%.
Identifikasi Bakteri yang Berpotensi Mendegradasi Hidrokarbon dari Substrat Mangrove dengan Tekstur Berpasir, Berlumpur, dan Tanah Liat Desy Shintya Irene; 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.p4

Abstract

Hydrocarbon compounds are commonly found in petroleum and gas, plastics, paraffins, and bitumen. Although hydrocarbons are the constituent compounds of the materials used by humans, some hydrocarbon compounds have adverse effects on the environment and humans. One alternative to solve this problem is by using Mangrove substrate in Ngurah Rai Forest Park, Bali which is the habitat of several species of bacteria that interfere with degrading hydrocarbons. This study aims to identify the bacteria that interfere with hydroxon, through macroscopic observation, microscopic and biochemical tests. The results of this study showed six isolate bacteria that interfere with degrading hydrocarbon compounds. Six isolates were from the genus Alcaligenes of sandy mangroves, Pseudomonas and Bacillus genus from muddy mangrove soils, and two genera of bacteria from clay substrate namely Alcaligenes and Bacillus. The disturbing bacterial proposals underlying the highest hydrocarbon were found on clay with a value of 58.51% and the lowest on sandy substrates, with a discount value of 0%. The highest value on the clay substrate can cause the clay substrate to bind hydrocarbons, air, nutrients, and oxygen higher than sandy and muddy soils. The lowest value on sandy substrate can lead to low bacterial capability and it takes a long time for bacteria to degrade hydrocarbons.
Laju Dekomposisi Serasah Daun Mangrove Bruguiera gymnorrhiza dan Sonneratia alba di Kawasan Hutan Mangrove Pulau Penyu, Tanjung Benoa, Bali Artha C. Rosevina Anak Ampun; I Wayan Gede Astawa Karang; 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.p12

Abstract

Mangroves are plants that play an important role in maintaining the fertility of mangrove ecosystems by contributing organic material derived from leaf litter. The rate decomposition of leaf litter is a destruction process by dead organisms into smaller particles. The decomposition process of mangrove leaf is affected by lignin and wax in nitrogen supply, environmental conditions, abundance of organisms, and air temperature. This research aims to determine the decomposition rate of leaf litter and percentage decomposition of Bruguiera gymnorrhiza and Sonneratia alba in mangrove forest area in Penyu Island, Tanjung Benoa, Bali. This research was conducted from February to April 2017. The method in this research used litter trap method. The location of the stations was based on the distance of the mangrove trees to the sea. Litter traps were placed on the six (6) stations. During the 60 days of decomposition process, Sonneratia alba leaf was decomposed faster than Bruguiera gymnorrhiza. The highest decomposition rate of Sonneratia alba leaf litter found at station 1 (1.7 g/day) with 99.9% decomposed, and the lowest at station 2 (1.38 g/day) with 99.64% decomposed. The highest decomposition rate of Bruguiera gymnorrhiza leaf litter found at station 1 (1.52 g/day) with 98.88% decomposed, and the lowest at station 2 (0.99 g/day) with 84.66% decomposed.
Pola Pertumbuhan Rumput Laut Yang Menggunakan Kantong Dan Tanpa Kantong Di Perairan Pantai Kutuh, Badung, Bali Ayu Putu Wiweka Krisna Dewi; Endang Wulandari Suryaningtyas
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.p18

Abstract

Seaweed farmers on Kutuh Beach experienced problems in seaweed cultivation activities, namely that seaweed cannot grow well. This is due to the large number of predators that ate seaweed in the cultivated area. One method that can be used to overcome this problem was using bags in seaweed cultivation. The purpose of the research that was carried out in July-October 2018 was to determine the effect of using bags on seaweed cultivation in Kutuh Beach waters. The method used in this research was experimental using two treatments (planting seaweed using bags and without bags) and three replications. Water quality parameters measured as supporting data ware DO, pH, salinity, temperature, nitrate, and phosphate. The result of this study was the growth of seaweed cultivated using bags is better than the growth of seaweed cultivated without bags.
Sebaran dan Keanekaragaman Cetacea saat Musim Timur di Perairan Tejakula, Buleleng, Bali Andri Octapianus Purba; IGB Sila Dharma; Elok Faiqoh
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.p9

Abstract

Cetaceans are marine mammals whose entire life is in marine and fresh waters. Cetaceans consist of whales, dolphins, and porpois. The distribution of cetaceans is a matter that shows the points of emergence of cetaceans in a waters. Diversity index is to determine the diversity of a group by looking at the number of species in a group. The waters of Tejakula Subdistrict are one of the waters in North Bali. The waters of North Bali is one of the waters which has become a migration path for several species of cetaceans. As a cetacean migration pathway, there are many occurrences of cetaceans in the northern waters of Bali. One of the most famous locations for the emergence of cetaceans in Bali is the waters of the Tejakula District, so research on cetaceans in the waters of the Tejakula Subdistrict needs to be done. This study aims to determine the distribution and diversity of cetaceans in the waters of Tejaula District. This research was conducted for 3 months, namely in the months of July, August and September 2017. Research on the distribution of cetaceans was carried out to determine the cetacean emergence points. The types of cetaceans found during the three months of the study were Stenella longirostris, Stenella attenuata, Globicephala macrorhynchus, Steno bredanensis, Lagenodelphis hosei, and Grampus griseus. The diversity of cetaceans in the waters of the Tejakula sub-district in July was 0.55, August 1.24 and September 0.9. The cetacea diversity index in the study area was divided into two, namely the area outside the reserve 1.22 and the area in the reserve 0.55.

Page 14 of 26 | Total Record : 251

 12   13   14   15   16 

Filter by Year

2015 2023


Reset
Filter By Issues
All Issue Vol 9 No 2 (2023) Vol 9 No 1 (2023) Vol 8 No 2 (2022) Vol 8 No 1 (2022) Vol 7 No 2 (2021) Vol 7 No 1 (2021) Vol 6 No 2 (2020) Vol 6 No 1 (2020) Vol 5 No 2 (2019) Vol 5 No 1 (2019) Vol 4 No 2 (2018) Vol 4 No 1 (2018) Vol 3 No 2 (2017) Vol 3 No 1 (2017) Vol 2 No 2 (2016) Vol 2 No 1 (2016) Vol 1 No 1 (2015) More Issue