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Journal of Marine and Aquatic Sciences

jmas
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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 234 Documents

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Distribusi Teripang (Holothuroidea) Pada Perairan Pesisir Nusa Lembongan, Kecamatan Nusa Penida, Kabupaten Klungkung, Bali Deptson Baringin Silaen; I Wayan Arthana; Suprabadevi Ayumayasari Saraswati
Journal of Marine and Aquatic Sciences Vol 4 No 2 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Sea cucumbers have a high economic potential and widely used by the community as food with nutrient content and high enough protein. The occurrence of an organism, including sea cucumbers in a waters is determined by the environmental factors of the waters, one of which is habitat. This study aims to determine the distribution of sea cucumbers (Holoturoidea) in the Coastal Waters of Nusa Lembongan, District Nusa Penida, Klungkung regency, Bali. This research was conducted in April-May 2017 in the Coastal Waters of Nusa Lembongan. This study looked at the distribution of sea cucumbers (Holoturoidea), substrate composition, physics-chemical parameters of waters (temperature, depth, salinity, pH, dissolved oxygen) and their relation to habitat conditions spread over Nusa Lembongan Coastal Waters. Data analysis in this study include the composition of sea cucumber, density of sea cucumber, the diversity of sea cucumber, and distribution of sea cucumbers. The results of the research conducted found 4 species of sea cucumber namely the type of Holothuria atra, Bohadchia vitiensis, Holothuria fuscocinerea and Holothuria sp. Physical-chemical parameters of the waters obtained in the research results are still categorized normal for the survival of sea cucumbers. Distribution of sea cucumbers during the study obtained by the results pattern of dispersal is clumped in all station with the index distribution value from 1.72 to 6.60.

Kandungan Nitrat dan Fosfat Sedimen serta Keterkaitannya dengan Kerapatan Mangrove di Kawasan Mertasari di Aliran Sungai TPA Suwung Denpasar, Bali Ni Nyoman Desi Kusuma Dewi; I Gusti Ngurah Putra Dirgayusa; Yulianto Suteja
Journal of Marine and Aquatic Sciences Vol 3 No 2 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Mangrove is a green plants tolerant of salt water, which grows mainly along the sheltered coastal areas, especially along the bay or in estuaries. Final Disposal (TPA) Rubbish Suwung which located in the village Pedungan South Denpasar District is the rubbish dumps originating from the city of Denpasar and Badung. There is a natural mangrove vegetation in the river TPA. Mertsari area which located in the village of Sanur, West Denpasar District is a mangrove planting area and tourism destination on the Mertasari Beach. The purpose of this research are as follows: (1) To identify the content of nitrate and phosphate in mangrove sediments, (2) To determine the density of mangrove in Region Mertasari and TPA Suwung River Flow and (3) To describe the mangrove density is linkage with nitrate and phosphate mangrove sediments. The method used on this research is linear regression. Nitrate and phosphate sediments of mangroves in TPA Suwung River Flow and Region Mertasari range of 0.04 ppm - 79.034 ppm. The average density results of the mangrove tree level, saplings and seedlings in different locations ranged 0.01 ind / m2 - 0.32 ind / m2. The river's flow TPA Suwung produce a simple linear regression calculation of nitrate mangrove sediments density y = -0,002x + 0,288 (R2 ) 10,1 %, and the calculation of the density sedimentary phosphate mangrove produce y = 0,007x + 0,125 (R2) 6,1 %. The results of simple linear regression calculation of nitrate sediments density Mertasari mangrove area is y = -0,002x+ 0,537 R2 = 4,7%, and the calculation of the density sedimentary phosphate mangrove produce y = -0,038x + 0,777 (R2) 63,7 %.

Studi Laju Perubahan Garis Pantai di Pesisir Tenggara Bali Menggunakan Citra Satelit Landsat (Studi Kasus Kabupaten Gianyar dan Klungkung) I Nengah Jaya Nugraha; I Wayan Gede Astawa Karang; I Gusti Bagus Sila Dharma
Journal of Marine and Aquatic Sciences Vol 3 No 2 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Erosion and abrasion are the events that led to the beach shoreline position changes. The impact of climate change is the rise in sea level also causes changes in the coastline. South East coast of Bali, especially along the coast Gianyar and Klungkung changing coastline. This study aims to identify and calculate the rate of shoreline change in Gianyar and Klungkung from 1995 to 2015. The study was a preliminary information shoreline change and do not analyze the causes such as tides, currents, waves, and wind. The method used remote sensing analysis with the extraction of the coastline from the Landsat 5 satellite images in 1995, Landsat 7 in 2005, and Landsat 8 2015. Landsat imagery analyzed by a combination of methods approach the threshold and band ratio of wave infrared and green. Image processing using software Quantum GIS 2.8 and System for Automated Geoscientific Analyses (SAGA) GIS 2.2, extention Digintal Shoreline Analysis System (DSAS) to make calculations transect coastline. The results of the analysis of overlaying identify coastline in Gianyar and Klungkung change at a rate that varies every village. The rate of change of coastline in Gianyar due to accretion between 0.5096 - 8.6074 m / yr, while due to erosion between -3.7343 to -1.3201 m / yr. The rate of change in Klungkung regency coastline due to accretion between 0.6337 - 2.6875 m / yr, while due to erosion between -8.8795 to -0.8833 m / yr.

Kondisi Substrat Dasar Perairan Cagar Alam Pulau Sempu, Kabupaten Malang Oktiyas Muzaky Luthfi; Firly Yulianto; Sanydo Pandapotan Caesar Pangaribuan; Dimas Bagus Dwi Putranto; Dimas Syarif Alim; Respati Dwi Sasmitha
Journal of Marine and Aquatic Sciences Vol 5 No 1 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The aim this study was to determine the condition of bottom substrate base of Sempu Island Nature Reserve of Malang that was very important to know the coral reef composition to support living creatures in this area. The research was conducted on December 8-9, 2017, the substrates data was taken by using Point Intercept Transect (PIT) for 100 m along of coast of Sempu Island (Reef Check Indonesia), the transect was divided into four parts 20 meters each segment and 5 m blank between segments. The data was taken into three stations, they were Teluk Semut 1 , Teluk Semut 2, and Watu Meja. The results of this study indicate that the basic substrate of waters at Sempu Island Nature Reserve is divided into two: living (HC = Hard Coral, SC = Soft Coral, NIA = Nutrien Indicator Algae, SP = Sponge and OT = Other) and non-living (RKC = Ricently Killed Coral, RC = Rock, RB = Rubble, SD = Sand and SI = Silt). Teluk Semut Station 1 was dominated by the rubble (39%), Teluk Semut 2 station and Watu Meja were dominated by hard coral (53%). In conclusion, from three monitored stations showed that the life coral percentage in Sempu Island water was significane changed during last one year where in Teluk Semut 1 the coral coverage decreased to 21.75%, while in Teluk Semut 2 and Watu Meja was increased up to 42.38% and 25.5% respectively. The natural and non-natural factors may have influenced the changed of substrate cover in Sempu Island water during this last year.

Kajian Kesesuaian Wisata Selam dan Snorkeling di Perairan Tulamben, Karangasem, Bali Nur Asni Puspita Sari; I Dewa Nyoman Nurweda Putra; I Gusti Ngurah Putra Dirgayusa
Journal of Marine and Aquatic Sciences Vol 3 No 1 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Tulamben village located in the district of Kubu, Karangasem regency, has developed into one of the maritime destination, especially diving and snorkeling. Based on data from the Department of Culture and Tourism of Bali, the average number of tourists coming to Tulamben in 2012-2014 reached 94,253 tourists. This condition makes the tourism has grown into a major economic support local communities in the Tulamben. Economic growth without being accompanied by an appropriate management plan will certainly produce a negative impact on coastal and marine resources to be a major asset for the growth. Various forms of management that allows to be applied has been identified in an effort to support the sustainability of the ecological, economic and socio-cultural community. This study was conducted to analyze the suitability of diving and snorkeling, coral identification were examined using LIT (Line Intercept Transect) methods while the abundance of reef fish species assessed using visual underwater cencus (UVC). Analysis of the data used is the analysis of the potential reef and suitability. Determination of the suitability of the area as a tourist diving and snorkeling analysis using matrix parameters to consider the appropriateness of the ecological conditions and water quality conditions of the four classifications. Cover of live coral communities ranged between 16.26% -52.48% with a diversity of reef fish species ranged between 11-44 types. Travel suitability index (IKW) category snorkeling and diving are included in the category is not appropriate (N) and the corresponding (S2).

Tingkat Kelulushidupan Karang Acropora jacqulineae pada Fragmentasi dan Transplantasi di Dalam dan Luar Air Widiastuti Widiastuti
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Coral transplantations are widely conducted at the coastal areas where corals are both fragmented and transplanted out of the water, exposed to open air and sunlight directly. However, the effectivity of these methods remain poorly understand due to different physiological type of corals. Coral Acropora jacqulineae is one of common transplanted coral for ornamental aquarium. The aim of this reseach was to examine the survival rates of fragmented and transplanted A. jacqulineae both in the water and out of the water. Each coral donor was fragmented with different initial sizes (3, 5 and 7 cm). All the fragments were cemented on the artificial substrate and arranged on the metal table which has been set on the sea floor at 15 m prior to the experiment. The survival rates were measured in every month for 9 months. The differences of the survival rates of fragmented and transplanted coral fragments both in the water and out of the water were analysed by using Fisher’s Exact test (P = 0.05). According to Fisher’s Exact test that the survival rates of coral A. jacqulineae fragmented and transplanted both in the water and out of the water were no significantly different. It is suggested that this condition occured within 2 hours. Therefore, coral A. jacqulineae is one of the coral that can be used in transplantation activity where coral takes out of the water. Nevertheless, this activity has to be done within 2 hours, otherwise it may bring lethal effect to the coral`s metabolism due to stress.

Cover Depan JMAS Vol 4(2), 2018 Cover Depan JMAS Vol 4(2), 2018
Journal of Marine and Aquatic Sciences Vol 4 No 2 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

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Kelimpahan dan Keanekaragaman Polychaeta pada jenis mangrove yang berbeda di Tahura Ngurah Rai Luh Pt Priyandayani; I Gede Hendrawan; Widiastuti Widiastuti
Journal of Marine and Aquatic Sciences Vol 4 No 2 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Mangrove at Tahura Ngurah Rai Bali contributes the organic material into environment. Polychaeta is one of the main benthic macrofauna that has important role in accumulating organic material to mangrove ecosystem. The purpose of this research is to explain the abundance and diversity of Polychaeta such as Rhizophora mucronata, mix mangrove and Sonneratia alba at Tahura Ngurah Rai. The sampling of Polychaeta using corers with diameter 17 cm and height 18 cm those sink in the substrate. The abundance was analyzed by the Krebs and diversity was analyzed by Shannon Wiener index. There were five genus of Polychaeta, such as Heteromastus, Marphysa, Laeonereis, Nereis, and Paranaitis. The highest abundance of Polychaeta was found in mixed stations (432 ± 57,37 ind/m2), and the lowest abundance was in R. mucronata (414 ± 79,93 ind/m2). The abundance of Polychaeta in the three stations did not differ significantly because it was influenced by the dominant substrate of sandy clay. The highest Polychaeta diversity was found in S. alba (0,704), followed by the mixed station (0,642), and the lowest was in R. mucronata. The value of Polychaeta diversity on the three stations differed significantly because of the comparison between the type and total number of individuals in each station that varied. The Polychaeta diversity index in the three stations is low, while the Polychaeta abundance value in each station is quite abundant. The result showed that the stability of the Polychaeta community in the mangrove ecosystem is unstable.

Histopatologi Insang Ikan Bandeng (Chanos chanos) yang tertangkap di Muara Tukad Badung, Bali Alfi Hermawati Waskita Sari
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

This study demonstrates the usefulness as a bio-indicator of milkfish (Chanos chanos), which are often caught in the TukadBadung Estuary Bali. Information regarding the histopathology gill organs of milkfish provides important early information for use in biomonitoring efforts to make ecosystems sustainable. The measurement results of heavy-metal Leads at Station III (0,0101 mg/L) exceeded the water quality standard threshold based on the KepMen Negara LH No. 51 Tahun 2004 standard for seawater quality (seawater biota). The results of the observation of the histopathological features of milkfish gills caught in Muara Tukad Badung revealed oedema, hyperplasia, hypertrophy fusion of the gill lamellae, Lifting ephitelium and telangiectasis.

Distribusi Spasial Kerapatan Mangrove Menggunakan Citra Sentinel-2A Di TAHURA Ngurah Rai Bali I Gede Merta Yoga Pratama; I Wayan Gede Astawa Karang; Yulianto Suteja
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The mangrove forest of TAHURA Ngurah Rai is one of the mangrove ecosystems in Bali that suffered damages and density changes due to natural factors and human activities. Remote sensing is one of the technology that can be used to estimate the density of mangrove canopy in TAHURA Ngurah Rai. The purpose of this study was to find the best vegetation index for estimating mangrove canopy density out and map it spatially using Sentinel-2A image. The method of this research is using vegetation index NDVI, EVI and mRE-SR to estimate mangrove canopy density. Field data was collected using Stratified Random and Proportional Sampling method by taking photo of the density of canopy using camera with Fish Eye lens on 34 plot. The results of this study show the satistic test of the linear model of the vegetation index with the mangrove canopy density value on the NDVI index (r = 0.8165, R2 = 0.6667, RMSE = ± 8.1508), EVI (r = 0.8597, R2 = 0.7390, RMSE = ± 7.8117), and mRE-SR (r = 0.9277, R2 = 0.8607, RMSE = ± 4.9571). The conclusion of this research is mRE-SR vegetation index able to map mangrove canopy density better than NDVI and EVI vegetation index with 86.07% accuracy. The mangrove spatial distribution generated from the mRE-SR model is 1002.22 Ha with 3.24 Ha categorized as very high density, 94.82 Ha categorized as high density, 333 Ha categorized as medium density, 402.38 Ha categorized as low density, and categorized as very low density is up to 168.76 Ha.

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