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Fluktuasi Kualitas Air Budidaya Ikan Nila (Oreochromis niloticus) dengan Beberapa Variasi Sistem Resirkulasi M Alfian Pratama; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 4 No 1 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Water quality has considerable influence on the survival rate and growth of Tilapia in aquaculture waters. Good environment is required for fish growth and survival rate. Recirculation aquaculture system can be used to maintain the optimal quality of water during fish maintenance. The working principle of recirculation system is reuse water repeatedly so the temperature, oxygen and other distributions more evenly distributed. This research aims to determine the water quality fluctuation that occurs in aquaculture of Tilapia with unfiltered recirculation system (control), biofilters system (bioball) and aquaculture system (using water spinach and pakchoy). The measured water quality parameters include temperature, potential hidrogen (pH), dissolved oxygen (DO), turbidity and total dissolved solids (TDS). The results of six repetitions on control treatment, biofilter treatment and aquaponic treatment showed pH values range from 7-8, dissolved oxygen from 6-8.5 ppm, temperature from 28-30 ° C, total dissolved solid from 250- 500 ppm, and turbidity values range from 0.5 to 6 NTU. The statistic result showed significant differences (P<0,05), between parameters for temperature, pH, dissolved oxygen, and turbidity, while parameter total dissolved solids there were no significant differences (P>0,05). The best water quality results showed for aquaponic treatment because values of water quality tend to be stable for fish growth.
Struktur Komunitas dan Tingkah Laku Ikan Pada Karang Genus Acropora di Perairan Desa Bondalem, Provinsi Bali Fikri Huda Falah; I Wayan Arthana; Ni Made Ernawati
Current Trends in Aquatic Science Vol 3 No 2 (2020)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This study was conducted to determine the condition of reef fish communities and fish behavior at coral genus Acropora. Data retrieval was done in 3 observation points. The observations was done by stationary visual sensus method. The observations were made as 3 times during 3 months. The result of data collected on 3 observation points obtained 35 species. Diversity category in 3 locations tend to be moderated, the value was range of 2.20 to 2.75 related to the value of dominance indexs, was range of 0.07 to 0.14. The value of similarity indexs (E) was range of 0.89 to 0,99 indicated a stable reef fish community. Based on observations of the behavior of fish in the community at each fish station had solitary and schooling behavior. Fish swimming habits generally swim above, below, or beside the reef. But also observed several types of fish that have a habit of swimming in crevices of coral which was the fish family of Pomacentridae. As for feeding habits, fish which were observed had an eating activities swimming toward their food. The results of measurements of current speed range from 0.37 to 1.20 m/s, the visibility was reached to the bottom of the water, turbidity 1.30-1.40 NTU, temperature 29.33-29.67°C, Depth 4.2-13.7 m, and the range of salinity values were 30.00-31.67‰. This value was still in accordance with the standard quality of sea water for marine biota. This was in accordance with the quality standard value of Bali Governor Regulation No.16 Year 2016.
Struktur Komunitas Epifauna di Area Pasca Budidaya Rumput Laut di Kabupaten Badung Bali Mohammad Rizqi; I Wayan Arthana; Alfi Hermawati Waskita Sari
Current Trends in Aquatic Science Vol 4 No 1 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Pandawa and Geger Beaches used to be seaweed farming areas, later became tourist attractions which resulted in changes in the structure of the epifauna community. This study aims to determine the community structure and water quality at both beaches. The study was conducted from December 2018 to January 2019. Descriptive method was used and the determination of stations used purposive sampling. The sample was taken by the line transect method. The highest abundance of Pandawa Beach epifauna was Diadema setosum (0.444 ind / m2). The highest diversity at the seaweed cultivation area station with a value of 1.105 which belongs to the medium category. The highest uniformity was also in the same station with a value of 0.797 which indicate a stable epifauna community. The highest dominance in the tourist area station with a value of 0.861 which indicates high dominance. At Geger Beach the highest abundance of epifauna was Cerithidea obtusa species and Tripneustes gratilla with the same abundance (0.144 ind / m2). The highest diversity at the station adjacent to the coral pool with a value of 1,944 included in the medium category. The highest uniformity at the same station with a value of 0.935 which indicates a stable epifauna community. The highest dominance was obtained at the station near the pier with a value of 0.229 which showed low dominance. Pandawa and Geger Beaches water quality was still relatively optimal with an average temperature, dissolved oxygen, salinity, currents, and pH of 30.5 oC; 5.4 ppm; 30.3 ppt; 0.1 m/s; and 8.6 respectively. At Geger Beach, the average temperature, dissolved oxygen, salinity, current and pH were 30.6 oC; 5.1 ppm; 30.1 ppt; 0.1 m/s; and 8.7 respectively.
Keterkaitan Tingkat Kesuburan Perairan Keramba Jaring Apung Dengan Fitoplankton Di Desa Terunyan, Danau Batur, Bali Ifan Martin Nopem; I Wayan Arthana; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 3 No 1 (2020)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This objective of this study is to determine the relationship of the level of water fertility in the waters of cage with phytoplankton in Terunyan Village, Batur lake. Data collected once a week in three months from November 2018 - January 2019. This study used descriptive methods and sampling points were determined using a purposive sampling technique based on the number of cage in the lake which consists of 3 points. Points 1 was the maximum number of cage of ± 500 pieces. Points 2 has a smaller number of cage which was ± 200 pieces. Points 3 was in location of no cage site. The abundance of phytoplankton tend to be less in the point that had more cages and overall the study obtained 14 phytoplankton genera from 4 phyla. The value of phytoplankton Abundance ranges from 4647 -7374 sel/L which is cathegorized in mesotrophic waters. The results of measurement of water quality parameters in a row with the range TSS 5.0 - 6.7 mg/L; Ammonia 0.155 - 0.177 mg/L; Nitrate 0.288 - 0.306 mg/L; Phosphate 0.207 - 0.565 mg/L; pH 7.9 - 8.0; Temperature 26 - 270C, Turbidity 3.049 – 3.410 NTU; DO 6.4 - 6.9 mg/L; Brightness 135.3 - 140.1 cm and TDS 107.5 - 130 mg/L.
Identifikasi Bakteri Patogen Pada Ikan Nila (Oreochromis niloticus) di Danau Batur, Bali Ni Putu Wiwin Angreni; I Wayan Arthana; Endang Wulandari Suryaningtyas
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This research aims to determine types of pathogen bacteria presented in body parts (liver and kidneys) of Tilapia (Oreochromis nilotics), types of bacteria attacks wild Tilapia and fish in Floating Culture Net (FCN) of Batur Lake as well as its prevalence bacteria found in Tilapia on Batur lake. Method used in this research is descriptive method, with a sampling method based on purposive sampling technique. According to identification’s result obtained, types of bacteria that infect liver were including to Aeromonas hydrophila, Plesiomonas shigelloides and Citrobacter freundii bacteria. Meanwhile, bacteria that infect kidneys are Aeromonas hydrophila, Aeromonas caviae, Plesiomonas shigelloides and Citrobacter freundii. Bacteria that infect wild fish are Aeromonas hydrophila, Aeromonas caviae and Plesiomonas shigelloides , while fishes in FCN are infected by Aeromonas hydrophila, Aeromonas caviae, Plesiomonas shigelloides and Citrobacter freundii bacteria. Infection prevalence of pathogen bacteria in Tilapia in Batur Lake is Aeromonas hydrophila at 55,5%, Plesiomonas shigelloides for 27,7%, Aeromonas caviae and Citrobacter freundii at 11,1%. According to sampling location, prevalence of bacteria that attacks wild fish are Aeromonas hydrophila and Plesiomonas shigelloides at 44,4%, Aeromonas caviae for 11,1%. Prevalence of bacteria that attacks fish in FCN is Aeromonas hydrophila for 66,6%, Citrobacter freundii infection at 22,2%, Aeromonas caviae and Citrobacter freundii at 11,1%.
Laju Pertumbuhan Karang Transplantasi Acropora sp. di Pantai Pandawa, Bali Mayang Utami; I Wayan Arthana; Ni Made Ernawati
Current Trends in Aquatic Science Vol 4 No 2 (2021)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Coral transplantation is a coral rehabilitation activity by cutting coral from a colony to be replanted. This study aimed to determine the differences in the growth of coral transplants of Acropora sp. using cement media and pipe media. Research on coral transplantation was carried out at the end of December 2020 to early March 2021 for 3 months at Pandawa Beach, Bali. Observations of coral growth using different media were carried out 6 times with an interval of 14 days using a caliper. Observations on the growth of coral fragments consisted of increasing the height and width of the coral. The results showed that the coral height of Acropora sp. using pipe media has the highest growth rate of 39.34 mm, coral height growth using cement media is 30.31 mm. The result of the highest growth width on coral using pipe media is 30.90 mm and the growth of coral width on cement media is 28.76 mm. The survival rate of coral Acropora sp. on cement media by 100% and on pipe media by 90%.
Produktivitas Primer Fitoplankton pada Daerah Penangkapan Ikan di Taman Wisata Alam Danau Buyan, Buleleng, Bali Ni Kadek Suardiani; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

This research aims to identify productivity value of phytoplankton’s net primary as well as its relation within parameter of physics, chemistry, and aquatic biology to the productivity value of phytoplankton’s net primary in the waters of Lake Buyan Nature Park. Measurement of primary phytoplankton productivity is conducted by using bright and dark bottle method. The taking of lake water samples for measurement of phytoplankton primary productivity and measurement of supporting parameters namely physics (temperature, brightness, turbidity), chemistry (pH, nitrate, phosphate) and biology (phytoplankton abundance) were carried out at four research stations in the fishing area. Data analysis used in this research is correlation analysis among parameters of physic, chemistry, and aquatic biology to the net primary productivity value of phytoplankton by using the PAST 3.1 application. The obtained result showed that the value of net primary productivity ranged from 76.39 to 211.46 mgC / m3 / day and the parameters of physics, chemistry and aquatic biology have a relationship with net primary productivity of phytoplankton. Brightness, abundance of phytoplankton, nitrate, temperature, dissolved oxygen, pH and phosphate which are positively correlated with net primary productivity of phytoplankton while water turbidity is negatively correlated with it. Parameters that have a strong to very strong relationship with net primary productivity are dissolved oxygen, temperature, nitrate, phytoplankton abundance, and water brightness.
Potensi Probiotik Skala Rumah Tangga untuk Meningkatkan Laju Pertumbuhan Ikan Nila (Oreochromis niloticus) Ni Luh Ayu Gita Astriani; I Wayan Arthana; Gde Raka Angga Kartika
Current Trends in Aquatic Science Vol 2 No 2 (2019)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

Aplikasi probiotik merupakaan salah satu metode alternatif untuk meningkatkan laju pertumbuhan ikan. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pemberian probiotik terhadap laju pertumbuhan ikan dan mendapatkan dosis optimum untuk Ikan Nila (Oreochromis niloticus). Bakteri yang digunakan dalam probiotik ini yaitu L. bulgaricus, Lactobacillus acidophilus dan Streptococcus thermophillus dengan kepadatan bakteri asam laktat 1.3 x107 CFU/ml. Penelitian ini bersifat eksperimental dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri dari empat perlakuan dan tiga kali pengulangan yaitu perlakuan I (10 ml/kg pakan), perlakuan II (15 ml/kg pakan), perlakuan III (20 ml/kg pakan) dan kontrol (tanpa probiotik). Data pertumbuhan dianalisis menggunakan metode One Way ANOVA (Analysis of Variance) dengan program Statistical Product and Service Solution (SPSS) yang dilanjutkan dengan Uji Duncan pada taraf kepercayaan 95% Hasil laju pertumbuhan berat mutlak tertinggi terdapat pada perlakuan II yaitu 3,31 gram/28 hari, diikuti oleh perlakuan I 3,03 gram/28 hari, perlakuan III 2,82 gram/28 hari, dan kontrol 2,37 gram/28 hari. Laju pertumbuhan spesifik tercepat terdapat pada perlakuan II yaitu 4,95 %/hari, perlakuan I 4,70 %/hari, perlakuan III 4,54 %/hari dan kontrol 4,21 %/hari. Tingkat kelulushidupan tertinggi terdapat pada kontrol yaitu 97,78%, diikuti oleh perlakuan III yaitu 91,11%, perlakuan II 80% dan perlakuan I yaitu 71,11%. Tingkat konversi pakan (FCR) terbaik terdapat pada perlakuan II karena memiliki FCR terendah yaitu sebesar 0,98, kontrol 1,03, perlakuan III 1,04 dan perlakuan I yaitu 1,29. Perlakuan II merupakan dosis optimum untuk Ikan Nila karena mengahasilkan laju pertumbuhan dan FCR terbaik, serta tingkat kelulushidupan (SR) yang masih diatas perlakuan I.
Kelimpahan dan Similaritas Gastropoda di Perairan Melasti dan Segara Samuh, Badung, Bali Gusti Ayu Manik Pradnyani; I Wayan Arthana; Ayu Putu Wiweka Krisna Dewi
Current Trends in Aquatic Science Vol 1 No 1 (2018)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (773.531 KB) | DOI: 10.24843/CTAS.2018.v01.i01.p05

Abstract

Melasti and Segara Samuh beach are located in Badung Regency. Melasti beach (station 1) has a water activity only used for swimming. Meanwhile, Segara Samuh beach (station 2) has been utilized for tourism, such as water sport, and fishing. The development of tourism in both stations is feared to affect the abundance of living biota existence in it. This study aims to identify the difference morphological characteristic and the abundance of gastropods, as well as the similarity between points by type of gastropods. This research has been conducted on February-March 2018. This research also used descriptive quantitative method. It has been found that there were 33 species in two stations that have not much different morphological characteristic and there were 25 different spesies in two stations . Station 1 has value of gastropod abundance which was on 66,8 ind/m2, while station 2 was only 36 ind/m2. In general, the high relation and shells diameter have positive values with the highest R2 is 0,99. A high value of similarity was found on 6 points as the result to the abundance of Conus lividus existence at point 4 and 5 with 0,48 as the highest result of negative correlation analysis. The measurement of water quality parameter at station 1 has resulted as follow; pH 7,7–7,8, DO 5,3–5,6 mg/L, salinity 30,3–30,9 ppt, and temperature 28–28,1 0C. Meanwhile at station 2, it was resulted with pH 7,7, DO 5,3–5,4 mg/L, salinity 30–30,8 ppt, and temperature 29,6-30 0C. Water condition in two stations were still within the range of seawater quality standards for marine life.
Tingkat Kesuburan Muara Tukad Aya, Jembrana Bali Berdasarkan Kelimpahan Plankton dan Ketersediaan Nutrien Josua Siagian; I Wayan Arthana; Dewa Ayu Angga Pebriani
Current Trends in Aquatic Science Vol 2 No 2 (2019)
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan dan Perikanan, Universitas Udayana

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Abstract

River estuaries have characteristics that were directly related to the sea, resulting of mixing water which resulting in a unique in terms of complex and dynamic environment and community structure of biota that was different from other waters. The purpose of this study was to determine the fertility level of Muara Tukad Aya base on the abundance of plankton. This research was conducted in February-March 2019 using descriptive quantitative methods. The average value of water quality in the three stations, namely turbidity ranges from 11.5 to 12.48 NTU, temperature 27.61-31.20C, current speed 0-0.2 m / s, brightness 72.32-86.8 cm, salinity 16.0-17.94 ppt, pH 8.02-8.14, Nitrate 0.5-1.05 mg / L, Phosphate 0.08-0.2 mg / L, DO 7.7- 8.8 (mg / L). The abundance of phytoplankton was found in 37 genera, the total abundance at station I (upstream of the estuary) was 1501 cells / l, at station II (open area of estuary) was 1322 cells / l and station III (close area of the estuary) with an abundance of 833 cells / l. Zooplankton abundance was 6 genera, where total abundance at station I was 9 ind / L, station II was 11 ind / l while station III was 10 ind / l . Water quality parameter values at estuary Tukad are still good and optimum except phosphate levels , The abundance of phytoplankton with nitrite and nitrate has a close relationship with the correlation coefficient -0.9014 and 0.8994.
Co-Authors A.A. Gede Cahya Pratama Abd. Rahman As-syakur Agus Wija Atmaja Aida Sartimbul Alfi Hermawati Waskita Sari Alya Namira Anak Agung Sagung Laksmi Dewi Andy Gunawan apri i supi'i Arief Reza Fahlevi Ayu Putu Wiweka Krisna Dewi Ayu, FeviLia Dea Bejo Slamet Beny Mustofa Bram Setyadji Bunga Divia Arimbi Cakranegara, Pandu Adi Candra Saputra CoK.I.M. HANDAYANI Daniel Nemba Dambe Daniel Tri Lakona Sinamo Debi Bunga Novitasari Deny Suhermawan Yusup Deptson Baringin Silaen Desak Putu Risky Vidika Apriyanthi Dewa Ayu Angga Pebriani Dewa Gde Tri Bodhi Saputra Dwi Suprapti Elok Faiqoh Endang Rustiasih Endang Wulandari Suryaningtyas Esayana, Ni Putu Elsita Fikri Huda Falah Fina Wahyuningsih GALIH INDRAWATI Gde Raka Angga Kartika Gde Raka Angga Kartika Gede Dwi Sukmawantara Gede Pasek Sutedja Gede Surya Indrawan Gemaya Wangsa Gultom, Henry Casandra Gunawan Tarigan Gusti Ayu Manik Pradnyani Habibatus Sholihah Hanifa Miranda I.H. Putri Heidi Siddiqa Heri Prabowo Herlisa Setiarini Hikmah Nurazizah Husnayati Hartini I Dewa Gede Warmadewa I Dewa Nym. Nurweda P., I Gede Agus Isha Purusa I Gede Hendrawan I Gede Wahyu Surya Wirawan I Gusti Agung Dwikhy Oka Taradhipa I Gusti Ayu Diah Hendiari I Gusti Ayu Novie Sidaningrat I Gusti Bagus Suputra I Gusti Made Sudipta I Kadek Tobing Ascahya I Ketut Swardika I Komang Dianto I Made Adi Karsa I MADE ADI PRANATHA I Made Minggu Widyantara I MADE SUDARMA I Made Suma Krisna Sravishta I Made Suwitra, I Made I Nyoman Gede Sugiartha I NYOMAN MERIT I Nyoman Sudipa I Nyoman Sumardika I Nyoman Sutama I Nyoman Sutama I Nyoman Yoga Parawangsa I Putu Eka Mahendra I W BUDIARSA SUYASA I Wayan Gede Astawa Karang I Wayan Juliawan I Wayan Kasa I Wayan Restu I Wayan Sandi Adnyana I Wayan Suarna I Wayan Subawa I Wayan Wesna Astara IDA AYU ASTARINI Ida Ayu Putu Widiawati Ida Ayu Utari Dewi ida bagus adi palguna Ida Bagus Ketut Gede Kertia Ida Bagus Lampita Prabawa Ida Bagus Windia Adnyana Ifan Martin Nopem IPG ARDHANA IRMA YULIA MADJID Joko Wiryatno Josua Siagian Josua Siagian KADEK ARY ANGGRAENI KADEK ARY ANGGRENI Kartika, I Wayan Darya Karyono Karyono Khadijah Irania Kolis Pratama Komang Bayu Permana Komang Gede Pramantara Komang Lina Rosita Sugiarni Krisna Jumantara Panca Putra Kusomo, Livia Letia Alda Fadilla Lisa Rosalia Prayuda Ludia Panggalo Luh Putu Diah Ananda Wijayanti Luh Putu Sudini M Alfian Pratama M. Sudiana Mahendra Made Ayu Pratiwi Made Widya Sekarbuana Mahendrawati, Ni Luh Mayang Utami Meta Apriliawati Sandi Miftachudin Syaiful Ma'ruf Mohammad Rizqi Mohan Budiman MOKHLAS SATIBI Mu'tasim Billah Muh. Abduh Anwar Muhammad Asir Muhammad Sawir Muhammad Yusuf Neru, Satrya Raul Ni Desak Putu Dita Herlinawati Ni Kadek Suardiani Ni Komang Rai Widhyaningsih Ni Luh Ayu Gita Astriani Ni Luh Ayu Gita Astriani Ni Luh Gede Ambarawati Ni Luh Gede Rai Ayu Saraswati Ni Luh Made Ari Sugianthi Ni Luh Putu Citra Adriyanti Ni Luh Watiniasih Ni Made Ary Widiastiti Ni Made Ernawati, Ni Made Ni Made Putri Kartika Jati Ni Putu Ayustin Krisnati Dewi Ni Putu Bella Yuliana Dewi Ni Putu Putri Wijayanti Ni Putu Sawitri Nandari Ni Putu Vivin Nopiantari Ni Putu Wiwin Angreni Ni Wayan Desy Wahyudiati Ni Wayan Ernawati NI WAYAN FEBRIANA UTAMI Ni Wayan Indah Purnamawati Nyoman Dati Pertami Octria Vesensia Olivia Grace Brigitta Florencia Pandu Pratama Putra Prabandari, Luh Nyoman Diah Sri Pramesti, Ni Komang Laksmi Ari Widya Putra, I Nyoman Giri Putri Eka Cahyani Putri Febrine Nainggolan Putri Nilakandi Perdanawati Pitoyo Putu Agus Arisudana Putu Ayu Irma Wirmayanti Putu Dyah Prastiti Sukma Febriany Putu Suryani . Rachmat Andi Saputra Rani Ekawaty Ranny R. Yuneni Ravita Kusuma Dewi Rifaldus Dani Rudiarta, I Ketut Gede S.A NYOMAN PUTRI TRIANTINI Sang Ayu Indah Sukma Dewi Sari, Anak Agung Arista Purnama Simon Nahak Stephanus Tambunan Suciati - SUCIKA ARMIANI, SUCIKA Suko Ismi Supardiono Supardiono Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati Suprabadevi Ayumayasari Saraswati SUPRATMAN - Suryadewa, Gusti Ngurah Agung suryawan, Gusti Bagus Susumu Kanno Syachry Banun Takahiro Osawa Takahiro Osawa Takahiro Osawa Teguh Prayogo Udayana , I Gede Kresna Wedatama, I Gusti Ngurah Raka Widiastuti Widiastuti Widiati, Ida Ayu Putu Wijaya, I Made Dicky Taruna Yoga Ibnu Graha Yuli Krisnawati YUNALDI YUNALDI Yuniarti K. Pumpun