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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil Jurnal Ilmiah Teknik Sipil Journal of Marine and Aquatic Sciences Omni-Akuatika Journal of Marine Research and Technology TRITON : Jurnal Manajemen Sumberdaya Perairan Ulil Albab

I Gusti Ngurah Putra Dirgayusa

Program Studi Ilmu Kelautan, Fakultas Kelautan Dan Perikanan, Universitas Udayana, Kabupaten Badung, Bali - Indonesia

Author-ID : 3755581

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Social Sciences

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Perbandingan Morfometrik dan Meristik Lamun Halophila ovalis di Perairan Pulau Serangan dan Tanjung Benoa, Bali I Gusti Ayu Ricca Mahatma Putri; I Gusti Ngurah Putra Dirgayusa; Elok Faiqoh
Journal of Marine and Aquatic Sciences Vol 4 No 2 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Halophila ovalis is a type of seagrass that has a round oval shape that can live in waters that have a muddy sand substrate. Morphometric and meristic are used to describe the waters where seagrass life seen from the morphology of leaves, rhizomes and roots. Morphometrics is a measure to determine the quantitative morphology of an organism structure and Meristik is a calculation to know the sum of a part of an organism.This research was conducted in December 2016-February 2017 with purposive sampling method at 10 observation station in Serangan Island and Tanjung Benoa. Data analyzed with descriptive analysis, Sturges criteria and Similarity Index of Morisita. Based on the results of leaf length study ranged from 9.4-51.3 mm, leaf width ranged from 6.7-19.8 mm, the number of leaf bones ranged from 10- 21 pairs, the length of the petiole ranges from 4.5 to 55.6 mm, the diameter of the petiole ranged from 0.03 - 1.4 mm, the length of rhizoma ranged from 6.2- 41.2 mm, diameter of rhizoma ranged from 0.04 -1.8 mm and root length ranged from 7.5-89 mm. By categorizing morfometrik-meristic seagrass H. ovalis, hence formed value of each research station gaze which will describe similarity between stations. In the similarity index of morisita, the research station in Serangan and Tanjung Benoa waters has similarity of morphometry - meristic very similar to 92.8% equality.

Studi Pertumbuhan Rumput Laut Jenis Kotoni (Eucheuma cottonii) dengan Menggunakan Metode Kurung Dasar dan Lepas Dasar di Perairan Geger, Bali Andreas Pratama Togatorop; I Gusti Ngurah Putra Dirgayusa; Ni Luh Putu Ria Puspitha
Journal of Marine and Aquatic Sciences Vol 3 No 1 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

One of the factors that define the success of seaweed is the planting methods It self. It is important because the method will directly affect the seaweed production. The main problem faced by seaweed farmer is declining the production over years. There are several reasons causing that problem, including, predator, desease and environment degradation. The purpose of this research is investigating the effectiveness of two different seaweed planting methods with the respect to the seaweed growth rate. The two methods that mentioned previously are off bottom and off bottom bracket method. The two methods are basically simillar, the first method (off bottom) is a conventional method, on the other hand, the second method was given an additional nets in order to cover the off bottom construction. The space between each seaweed planting on two different methods are defined similar, which are 25 cm. The initial planting weight was measured 100 grams. Observation was done for 42 days (6 week) and data collection was performed every 7 days on total of 10 individual seaweed each treatment. Absolute weight, daily growth rate, daily growth and specific growth rate are calculated. The data analysis will be done using F test at ? = 0.05 (SPSS 12.0). The result found that the growth rate of seaweed (Eucheuma cottoni) under off bottom bracket was not significantly different compared to the off bottom method (?= 0.476).

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

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.

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 %.

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).

Penentuan Titik Lokasi Pelabuhan Penyeberangan Amed Di Kabupaten Karangasem I Gusti Ngurah Putra Dirgayusa
Journal of Marine and Aquatic Sciences Vol 2 No 2 (2016)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Accumulation of social activity, economy and transportation that occur in Southern part of Bali adversely affects at transportation infrastructure carrying activity in this area. These require the government to get the solution of this problem. Through spatial planning area of Bali province 2005, governments establish Amed Bay developed as crossing harbor. These cases mean to divide the shout hem traffic line and support the development in northern part of Bali. The object of this research is in Purwakerti village, district of Abang, Karangasem regency. Research held based on technical and legality review. In advance analyze of those aspects that established some alterative potential location based on area requirement and mapping survey result. Following, each location alternative disassembly and examined their advantages and disadvantages in each aspect. Technical aspect analyze of land and territorial water technique. The approach that used in harbor location selection for this technique is weighting and assessment method in assessment matrix. The weighting value that used refers to harbor location selection in Makian bay. Meanwhile, for legality aspect, analyzed by policy review that relate to spatial area and location selection of harbor development. Based on minimum area demand analyze that 0.7 Ha for land facilities and 15.8 Ha for waters facilities. Refers to minimum area demand and layout spatial survey, four locations are selected for alternative points. After technical and legality aspect analyzed, then obtained second area chosen which located in Amed country, Purwakerti village.

Pengaruh Hasil Tangkapan Ikan Tongkol (Euthynnus sp) dan Pendapatan Keluarga Nelayan Terhadap Tingkat Pendidikan Anak Keluarga Nelayan di Desa Seraya Timur, Kecamatan Karangasem, Kabupaten Karangasem Ni Kadek Apriantari; I Gusti Ngurah Putra Dirgayusa; Abd. Rahman As-syakur
Journal of Marine and Aquatic Sciences Vol 3 No 2 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The East Seraya village has a potential of marines and fisheries, such as pelagic fish especially mackerel tuna fish according, production of tuna fish catch of 81% with the of catches 20.278,10 ton/year. Research on the effect of catch fish and income of fisherman family on education level of children of fisherman family have been done at Seraya village. Data were collected in each group of fishermen from January to February 2017. The sample was taken using simple random method, with 89 respondents. Methods for the analysis of the effect of tuna catch and family income of fishermen on education level of children of fishermen family using multinomial logistic regression analysis with software SPSS (Statistical Package for Social Science. The educational level of the fishermen family has been completed at the level of fishermen children as follows; 2,2% for elementary school 14,6 % for junior high school, 33,7% for senior high school, 31,5 % for diploma, and 18,0%. Coefficient of R square determination Cox and Snell value is 0,940 which means that mackerel tuna fishing results and the fishermen incomes are simultaneous with the education level of fishermen children in the amount of 94%. Variable contribution of mackerel tuna fishing results (X1) which much affect the education level of fishermen children and the income of fishermen household (LnX2) affects the education level of fishermen children which is significant.

Modifikasi Nilai Luas Area dan Waktu Kunjungan Dalam Penghitungan Daya Dukung Kawasan Wisata di Provinsi Bali: Studi Kasus Pantai Geger I Wayan Artadana; Abd. Rahman As-syakur; Widiastuti Widiastuti; I Gusti Ngurah Putra Dirgayusa
Journal of Marine and Aquatic Sciences Vol 4 No 2 (2018)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Carrying Capacity is an important consideration in sustainable tourism development. One of the developing tourist destination in Bali island is Geger Beach which is located in Badung regency, Bali. Geger beach has different conditions with other beaches, therefore it is necessary to determine the estimation area and duration for tourist activities without degrading the quality of the environment. This study aimed to determine the unit of the area, the required time, and the total time per day for particular tourist category according to the condition at Geger beach. Moreover, this study investigated the condition of carrying capacity in the Geger beach. The data were collected primary data obtained by interviewed 100 respondents in Geger Beach and based on literature study on the secondary data. Results showed that the average area for tourism activities (Lt) is 41.5 m2 and the duration for tourism activities (Wp) is 2.29 hours/day. The total time that area provided for tourism activities is 10 hours/day and the total area is 5.023 m2. Carrying capacity value at Geger beach uses Lt and Wp value is 529 people/day, 16.385 people/month or 196.620 people/year. The carrying capacity of Geger Beach conditions is suggested remain under carrying capacity for the entire month and the total visits during 2016.

Struktutr Komunitas Ikan dan Tutupan Karang di Area Biorock Desa Pemuteran, Buleleng, Bali Febriyanto Arifin; I Gusti Ngurah Putra Dirgayusa; Elok Faiqoh
Journal of Marine and Aquatic Sciences Vol 3 No 1 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Biorock is new method of coral reef rehabilitation. Today, the structure Biorock been made in various shapes and sizes. Therefore, assessment of reef fish communities and coral cover on the artificial reef Biorock of different sizes are needed as a as the basic information and the utilization of the results of the conservation area. From this research, it is known that the six Biorock structure obtained reef fish composition consisting of 18 Family and 45 fish species and abundance of total 2065 individuals. In accordance with the classification of diversity index Shannon - wiener all sizes Biorock the research object falls into the range of values diversity moderately 1.57 - 2.95. The results of the uniformity index show that in every size Biorock has equal distribution of species. From the results of the dominance of index calculation (C) is included in the low category. Where in any size Biorock not happen domination by a single species. In all sizes Biorock have value mengindikasinkan that coral is in good shape. The highest coral cover in sequence contained in the structure of Small-sized Biorock 1, 1 medium, 2 Large, 2 Small, 2 Medium, and 1 Large. From analysis using Bray-Curtis similarity index gained 2 groups Biorock structures that have similar types of fish encountered. The first group is the first Large-sized Biorock structure, Large 2, and the medium 1. The second group is the structure of Small-sized Biorock 1, 2 medium and 2 Small.

Keanekaragaman dan Biomassa Ikan Karang serta Keterkaitannya dengan Tutupan Karang Hidup di Perairan Manggis, Kabupaten Karangasem, Bali I Made Raditya Putra; I Gusti Ngurah Putra Dirgayusa; Elok Faiqoh
Journal of Marine and Aquatic Sciences Vol 5 No 2 (2019)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

The existence of coral reef fish is closely related to the availability of coral reef resource as a habitat. Coral reef fish is a biota that has a fascination with a variety of color patterns and fascinating. Differences in coral cover conditions will affect the abundance of coral reef fish, especially those with strong linkages to living corals. This research was conducted in June - August 2017 by using line intercept transect (LIT) method for coral cover percentage and visual census method for biodiversity and biomass of coral reef fish with 3 research stations in Manggis waters, Karangasem. From the research results, it shows that the diversity index ranged between 2.54 - 2.70 which means the diversity of coral reef fish in the medium category and the stability of the community is in the medium. Furthermore, total biomass of coral reef fish ranged between 186,17 - 1692,08 kg / ha. The results stated that the percentage of live coral cover in Manggis waters ranged from 3.83% to 12.44% which means that live coral cover is categorized as bad. A very strong positive correlation between living coral conditions and coral reef fish biomass was 92.42%. Meanwhile, the relationship between living coral conditions and the diversity of coral reef fish had a strong positive correlation of 65.4%. The diversity of coral reef fish in waters is not only caused by live coral cover; however, it is caused by coral reef ecosystems that are associated in the bottom of the waters.

Co-Authors AAK Aswan Deva Abd. Rahman As-syakur Andreas Pratama Togatorop Basyaasyah Rahmaningrum Pettalolo Br Sitepu, Fany Ekaristy Carolina Asrin Desy Shintya Irene Dwi Budi Wiyanto Elok Faiqoh Febriyanto Arifin Gede Surya Indrawan Heny Hayati Heru Wicaksono I Dewa Nym. Nurweda P., I Dewa Nyoman Nurweda I Gede Hendrawan I Gede Surya Indrawan I Gusti Ayu Dian Indraswari I Gusti Ayu Ricca Mahatma Putri I Gusti Bagus Sila Dharma I Gusti Bagus Sila Dharma I Kadek Aldi Wahyu Andika Maha Putra I Ketut Budiarta I Ketut Wija Negara I Komang Subandi I Made Raditya Putra I Made Rai Januatmika I Made Satya Prayoga I Made Subali Arta Arta I Pande Made Lanang Kertadana I Putu Aditya Budi Wacika I Putu Oka Saduarsa I Wayan Artadana I Wayan Nuarsa Ida Ayu Made Inten Melinia Ida Bagus Ketut Ravidhya Krisna Sekar Ida Bagus Putu Adi Gita Saputra Ika Arofa Setiawati Jenisia Barros Soares Jesikapna Callia Br Guru Singa Kadek Weda Ari Bhawana Kadek Widya Suryaningsih Muhammad Fakhri Ramadhani Ngakan Putu Purnaditya Ni Kadek Apriantari Ni Luh Putu Ria Puspitha Ni Luh Putu Ria Puspitha Ni Nyoman Desi Kusuma Dewi Ni Nyoman Pujianiki Ni Wayan Loviasari Nur Asni Puspita Sari Pande Chrisna Aryasuta Puspitha, Ni Luh Putu Ria Putra, I Nyoman Giri Putu Adi Prawira Riris Christiani Gultom Rizky Ramadhan Siahaan, Jonathan M Timothy Kenoly Trisilia Mulyawati Anggraeni Wattimena, Adolf Krisna Mahendra Widiastuti Karim Widiastuti Widiastuti Yulianto Suteja

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