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Pengaruh Penggunaan Tepung Lemna (Lemna minor) yang Difermentasi Menggunakan Kombucha terhadap Pertumbuhan Benih Ikan Patin Siam (Pangasianodon hypophthalmus) Muhammad Ilham Syarif; Adelina Adelina; Indra Suharman
Ilmu Perairan (Aquatic Science) Vol 10, No 2 (2022): Juli 2022
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jipas.10.2.p.120-128

Abstract

Penelitian ini dilaksanakan pada bulan Agustus - Oktober 2020 bertempat di Laboratorium Nurisi Ikan dan Waduk Fakultas Perikanan dan Kelautan Universitas Riau. Tujuan penelitian ini adalah untuk mengetahui persentase pengunaan tepung lemna (Lemna minor) fermentasi terbaik dalam pakan buatan untuk meningkatkan efisiensi pakan dalam pertumbuhan benih ikan patin siam (Pangasianodon hypophthalamus). Rancangan yang digunakan adalah Rancangan Acak Lengkap (RAL) satu faktor dengan 5 perlakuan dan 3 kali ulangan. Perlakuan dalam penelitian ini adalah  penggunaan fermentasi tepung lemna fermentasi dalam pakan dengan persentase yang berbeda, yaitu P0 (0% TLF), P1 (25% TLF), P2 (50% TLF), P3 (75% TLF) dan P4 (100% TLF) dalam pakan. Kadar protein pakan 32%. Pakan uji yang diberikan ke benih ikan patin siam sebanyak 10% dari bobot biomassa yang diberikan 3 kali sehari, yaitu pada pukul 08.00, 12.00 dan 16.00 WIB. Benih ikan patin siam yang digunakan dengan bobot rata-rata berkisar 2,13±0,09 g/ekor dan dipelihara dalam keramba berukuran 1x1x1 m. Benih ikan patin siam yang dipelihara di dalam masing-masing keramba berjumlah 25 ekor. Wadah yang digunakan untuk pengamatan parameter kecernaan adalah akuarium berukuran 60x40x40 cm dengan jumlah 20 ekor setiap akuariumnya. Pakan yang digunakan untuk parameter kecernaan pakan dan kecernaan protein ditambahkan dengan Cr2O3 sebanyak 0,5% dari jumlah pakan yang dibuat. Pakan diberikan secara ad satiation dengan frekuensi 3 kali sehari, yaitu pada pukul 08.00, 12.00 dan 16.00 WIB. Feses yang dikumpulkan, kemudian dikeringkan dan diuji kandungan Cr2O3 dan proteinnya. Hasil penelitian menunjukkan bahwa perlakuan tebaik terdapat pada P4 (100% TLF dan 0% TK) dengan kecernaan pakan 68,20%, kecernaan protein 85,20%, efisiensi pakan 40,00%, retensi protein 21,30%, laju pertumbuhan spesifik 3,54% dan kelulushidupan 96%. Kualitas air selama penelitian adalah suhu 27,5-29οC, pH 6-8 dan DO 5-6,4 mg/L.
PERFORMA PERTUMBUHAN IKAN NILA MERAH, Oreochromis niloticus PADA SISTEM BIOFLOK DENGAN FREKUENSI PEMBERIAN PAKAN YANG BERBEDA Iskandar Putra; Rusliadi Rusliadi; Niken Ayu Pamukas; Indra Suharman; Heri Masjudi; Novreta Ersyi Darfia
Jurnal Riset Akuakultur Vol 17, No 1 (2022): (Maret, 2022)
Publisher : Politeknik Kelautan dan Perikanan Jembrana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (63.392 KB) | DOI: 10.15578/jra.17.1.2022.15-21

Abstract

Ikan nila merupakan ikan budidaya yang disukai oleh masyarakat karena dagingnya yang gurih dan lezat. Untuk peningkatkan produksi ikan nila diperlukan pakan yang cukup, baik kualitas maupun kuantitasnya. Pakan merupakan komponen biaya operasional utama pada budidaya ikan nila yang diperkirakan mencapai 40%-60%. Untuk mengatasi hal tersebut diperlukan teknologi yang dapat menekan biaya operasional dalam sistem budidaya. Tujuan dari penelitian ini adalah mengevaluasi frekuensi pemberian pakan yang berbeda terhadap pertumbuhan dan sintasan ikan nila merah (Oreochromis niloticus) yang dipelihara dengan sistem bioflok. Metode yang diterapkan adalah eksperimen dengan empat perlakuan dan tiga kali ulangan. Perlakuannya adalah frekuensi pemberian pakan pelet yaitu (A) 1 kali/hari, (B) 2 kali/hari, 3 kali/hari, dan 4 kali/hari. Ikan nila ukuran 3,71 ± 0,11 cm dan bobot 4,49 ± 0,021 g dipelihara selama 56 hari dalam bak 100 L dengan padat tebar 16 ekor/bak. Ikan dipelihara dengan teknologi bioflok dan diberikan pakan setiap harinya sebanyak 5%/berat biomasa/hari. Hasil penelitian menunjukkan bahwa pemeliharaan ikan nila merah pada sistem bioflok dengan frekuensi pemberian pakan yang berbeda berpengaruh nyata (P<0,05) terhadap performa pertumbuhan, sintasan, dan efisensi pakan. Perlakuan frekuensi pemberiaan pakan 2 kali/hari merupakan perlakuan terbaik menghasilkan pertumbuhan bobot mutlak 23,07 ± 0,89 g; laju pertumbuhan harian 3,23 ± 0,05%; sintasan 91,66 ± 3,60%; dan efisensi pakan 96,73 ± 6,70%.Tilapia (Oreochromis niloticus) is a cultured fish that is favored by the public, because of its delicious meat and high protein content. To increase production, quality, and quantity of feed is needed, feed is the main component in the cultivation system and it is estimated that 40%-60% of the costs incurred in maintaining tilapia are needed. To overcome this, technology is needed that can reduce operational costs in fish culture. The purpose of this study was to evaluate the growth and survival of red tilapia with different feeding frequencies reared with a biofloc system. The research method applied was experimental with four treatments and three replications. The treatment was the frequency of feeding, namely (A) 1 time/day, (B) 2 times/day, 3 times/day, and 4 times/day. Tilapia were reared for 56 days in a 100 L tank with a stocking density of 16 fish/tank. Initial size 3.71 ± 0.11 cm and weight 4.49 ± 0.021. Tilapia are reared with biofloc technology and given daily feed of 5%/weight of biomass/day. The results showed that rearing red tilapia with different feeding frequencies in the biofloc system had a significant effect (P<0.05) on growth performance, survival, and feed efficiency. Treatment B with a frequency of feeding 2 times/day was the best, with absolute growthof 23.07 ± 0.89 g, daily growth rate of 3.23 ± 0.05%, survival rate 91.66 ± 3.60%, and feed efficiency 96.73 ± 6.70%.
Sosialisasi Pembangunan Rasa Percaya Diri Siswa SMAN 2 Kampar Untuk Melanjutkan Pendidikan Tingkat Universitas Muhammad Andryan Juliardy; Bunga Cantika; Soufyana Zahra Minda; T. Nalacintia Miazara; Radhiansyah Fikri; Triani Cahya Fitri Sabilah; Deta Anjellyta; Anugrah Aurora Dhearesta; Febri Samuel L.G; Muhammad Fadil Ghifari; Indra Suharman
Jurnal Kewarganegaraan Vol 6 No 2 (2022): Desember 2022
Publisher : UNIVERSITAS PGRI YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (358.594 KB) | DOI: 10.31316/jk.v6i2.2789

Abstract

Abstrak Rendahnya minat untuk melanjutkan jenjang pendidikan ke tingkat yang lebih tinggi merupakan suatu permasalahan dalam bidang pendidikan di Desa Koto Tibun tepatnya di SMAN 2 Kampar. Hal ini diakibatkan oleh beberapa faktor yang mempengaruhi minat siswa-siswi dalam melanjutkan pendidikan ke jenjang yang lebih tinggi, faktor ekonomi, tidak memiliki kepercayaan diri, dan tidak ada bimbingan untuk melangkah ke pendidikan yang lebih tinggi. Dalam pengabdian tim Kuliah Kerja Nyata (KKN) Desa Koto Tibun membuat sebuah kegiatan sosialisasi dengan sasaran siswa-siswi kelas 12 untuk menanyakan dan meyakinkan diri para siswa-siswi untuk berani mengambil keputusan untuk melanjutkan pendidikan tidak hanya berakhir di tingkat SMA. Kata Kunci: Pendidikan, Perguruan Tinggi, SMA
Growth Performance of Striped Catfish (Pangasianodon hypopthalmus) Fed by Fermented Water Hyacinth Santi Ramayani; Indra Suharman; Iesje Lukistyowati
Jurnal Perikanan dan Kelautan Vol 27, No 3 (2022): October
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.27.3.347-353

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Fermented water hyacinth by Aspergillus niger can be used as alternative ingredient replacing soymeal for feed in striped catfish. The experimental designed consist of five treatment substitution of soymeal used fermented water hyacinth and three repliacate:  T0 (feed without FWH); T1 (25% FWH); P2 ( 50% FWH); P3 (75% FWH); and P4 (100% FWH. ). A total of 375 Striped catfish weight 4.21 ± 0.42 g were stocked with a density of 25 fish m-3 in fixed net cages. The study was conducted for 42 days. The results showed that the treatment given improved growth, feed convertion, and survival rate of striped catfish at dose FWH 50% It is recommended that substitution FWH 50% can used to replacing soymeal for feed striped catfish
Pendidikan Profil Bisnis Komoditas Budidaya Ikan Air Tawar Tomi Ramadona; Andri Hendrizal; Indra Lesmana; Yudho Harjoyudanto; Muhammad Arief Wibowo; Iskandar Putra; Indra Suharman; Trisla Warningsih
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 1 No. 2: Mei 2022
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pengembangan budidaya ikan air tawar membutuhkan bantuan dari pihak perbankan khususnya aspek permodalan. Kegiatan ini bertujuan untuk meningkatkan pemahaman pegawai bank dalam budidaya ikan air tawar sehingga diharapkan mampu melayani nasabah pelaku usaha ikan air tawar dengan lebih baik. Metode pelatihan menggunakan ceramah, diskusi dan field trip ke lokasi usaha perikanan air tawar. Hasil pendidikan profil bisnis komoditas ikan air tawar menunjukkan peningkatan pemahaman peserta terhadap seluk beluk budidaya ikan air tawar. Melalui kegiatan ini diharapkan pengembangan budidaya ikan air tawar terus berkembanga di masa yang akan datang.
Pemberdayaan Lingkungan Masyarakat Melalui Sosialisasi Hidroponik System Wick (sumbu) Di Desa Tanjung Simandolak, Kecamatan Benai, Kabupaten Kuantan Singingi, Provinsi Riau Syahputra Syahputra; Indra Suharman; Divo Afrianto; Enggar Akbar Nur Izza; Muhammad Sorim Arkan; Septia Nursa; Amirah Mardhiyah; Ayu Lestari; Mika Handayani; Eka Wahyu Ningsih; Retno Tri Pratiwi
Faedah : Jurnal Hasil Kegiatan Pengabdian Masyarakat Indonesia Vol. 1 No. 4 (2023): November: Jurnal Hasil Kegiatan Pengabdian Masyarakat Indonesia
Publisher : FKIP, Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59024/faedah.v1i4.332

Abstract

The socialization of hydroponics to the village community is an effort to develop the independence and welfare of the community by improving knowledge, attitudes, skills, Hydroponics is a cultivati Wick hydroponics is a simple hydroponic method that uses a wick as a link between nutrients and the roots of the growing media. This activity was carried out in Tanjung Simandolak Village, Benai District, Kuantan Singingi, Riau. This activity began with a theoretical and practical explanation with pakcoy mustard plants as an example, the practice carried out starting from seed sowing, wick system, transplanting and continued with a discussion session. The results of this activity are that the Tanjung Simandolak village community knows hydroponics in general, wick system hydroponics, plant maintenance, handing over hydroponics to the This activity adds to the knowledge and insight of the Tanjung Simandolak village community about hydroponics and can spread and teach the knowledge.
Pendidikan Profil Bisnis Komoditas Budidaya Ikan Air Tawar Tomi Ramadona; Andri Hendrizal; Indra Lesmana; Yudho Harjoyudanto; Muhammad Arief Wibowo; Iskandar Putra; Indra Suharman; Trisla Warningsih
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 1 No. 2: Mei 2022
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v1i2.396

Abstract

Pengembangan budidaya ikan air tawar membutuhkan bantuan dari pihak perbankan khususnya aspek permodalan. Kegiatan ini bertujuan untuk meningkatkan pemahaman pegawai bank dalam budidaya ikan air tawar sehingga diharapkan mampu melayani nasabah pelaku usaha ikan air tawar dengan lebih baik. Metode pelatihan menggunakan ceramah, diskusi dan field trip ke lokasi usaha perikanan air tawar. Hasil pendidikan profil bisnis komoditas ikan air tawar menunjukkan peningkatan pemahaman peserta terhadap seluk beluk budidaya ikan air tawar. Melalui kegiatan ini diharapkan pengembangan budidaya ikan air tawar terus berkembanga di masa yang akan datang.
Upaya Pencegahan Stunting dengan Nugget Daun Kelor Bersama Mahasiswa KKN UNRI di Desa Beringin Taluk Ahmad Zulfahmi; Erlangga Putra; Annisa Nur Aliyah; Lala Indriani; Putri Tri Ghaziah; Rima Maisarah; Azyzi Syahren Revina; Al Fajri S; Ade Irma Agustina; Shafira Nurjannah; Indra Suharman
SAFARI :Jurnal Pengabdian Masyarakat Indonesia Vol. 3 No. 4 (2023): Oktober: Jurnal Pengabdian Masyarakat Indonesia
Publisher : BADAN PENERBIT STIEPARI PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56910/safari.v3i4.943

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Stunting is a global health problem that affects the physical growth and development of children. This study aims to evaluate the effectiveness of using Moringa leaf nuggets in preventing stunting in preschool children. The research method involved 20 children aged 4-8 years who received Moringa leaf nuggets as a daily supplement for 6 months. Child growth parameters, including height, weight, and head circumference, were measured at the beginning and end of the study. The results of the analysis showed a significant increase in the physical growth of children in. Moringa leaf nuggets have the potential to be an easily accessible and effective stunting prevention strategy. This research provides initial support for the use of Moringa leaves as a functional food ingredient in efforts to prevent stunting in preschool children. Further studies are needed to understand the mechanisms and long-term effects of using Moringa leaf nuggets in the context of stunting prevention
Application of Photoperiod Manipulation and Type of Feed on the Growth and Survival of Clarias gariepinus Fry Pandiangan, Dian Pramanda; Suharman, Indra; Aryani, Netti
Jurnal Perikanan dan Kelautan Vol 28, No 3 (2023): October
Publisher : Faculty of Fisheries and Marine, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.28.3.299-306

Abstract

African catfish (Clarias gariepinus) is a freshwater fish that has the advantages of fast growth, high economic value, adaptability to environmental changes, and easy marketing. This study aims to analyze the growth rate, survival rate, and nutritional content of African catfish after being treated with photoperiod and different types of feed. The research was conducted from September to December 2022, at the Fish Health Laboratory at the Matauli Marine and Fishery College, Central Tapanuli. The method used is an experimental method by applying a Completely Randomized Design Factorial, two factors, and three replications. The first factor is the photoperiod (B), namely natural (B1), 18 hours dark 6 hours light (B2), 24 hours dark (B3), and the second factor is the type of feed (A), commercial feed (A1) and maggot (A2). The test fish used were obtained from the Central Tapanuli Fish Cultivation Seed Center measuring 16.01±0.02 cm and weighing 30.00 ± 0.00 g for a total of 126 individuals. Fish were reared for four weeks in rearing containers with a stocking density of 1 fish/10L. Feed is given four times a day, namely at 06.00, 12.00, 18.00, and 24.00 ad satiation. The results showed that photoperiod manipulation and different types of feed affected the growth and survival of African catfish fry (p<0.05). The combination of photoperiod 24 hours dark and maggot feed (B3A2) gave the best results on absolute weight growth of 22.70g, absolute length of 2.56 cm, a specific growth rate of 2.01%/day, a survival rate of 100%, and nutritional content of fish meat such as protein of 18.97%, 8.68% fat, 0.73% fiber, 1.54% ash, and 80.26% water
Utilization of Fermented Chicken Feather Flour Using Rhizopus sp in Feed on the Growth of Striped Catfish (Pangasianodon hypophthalmus) Nazar, Muhammad Ahlun; Adelina, Adelina; Suharman, Indra
Jurnal Perikanan dan Kelautan Vol 29, No 1 (2024): February
Publisher : Faculty of Fisheries and Marine, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.29.1.77-85

Abstract

This study aims to determine the effect of feeding containing fermented chicken feather flour on feed efficiency and growth of striped catfish fry. The test fish used weighted 2.85 ± 0.33 g. The containers used for observing fish growth were 15 units of floating net cages made of gauze measuring 1x1x1 m with a stocking density of 25 ind/m, 3 and 5 units of aquariums measuring 60x35x40 cm as containers for observing the digestibility of feed with a stocking density of 25 ind/m3. This research method used a one-factor Completely Randomized Design (CRD) with five treatment levels and three replications. The treatments in this study were P0 (feed without fermented feather meal), P1 (feed containing 7.5% fermented feather meal), P2 (feed containing 15% fermented feather meal), P3 (feed containing 22.5% flour fermented chicken feathers), and P4 (feed containing 30% fermented chicken feather flour). The test feed protein was about 40%. The amount of feed given is 5% of the body weight of the fish with a frequency of 3 times a day, namely morning, afternoon, and evening. Fish rearing was carried out for 56 days. Measure the digestibility of feed by giving feed containing an indicator of 0.5% chromium oxide (Cr2O3). Feed is offered three times a day, namely morning, afternoon, and evening, as much as 5% of the body weight of the fish. The feces excreted by the fish are then collected and dried. The collected feces were analyzed for protein content and Cr2O3 to obtain feed and protein digestibility data. The results of this study indicated that the best treatment was P3 (feed containing 22.5% fermented chicken feather meal), resulting in feed digestibility of 55.36%, protein digestibility of 85.39%, feed efficiency of 83.59%, protein retention of 36.33%, specific growth rate of 3.38%, and survival of 92.00%
Co-Authors ', Adelina Abdul Rasyid Lubis Ade Ad Ade Irma Agustina Adelina Adelina &#039; Adelina Adelina Adelina Adelina Adelina Adelina Adelina Adelina Adelina, Adelina Adelina, Adelina Adelina, Adelina Afan Sholeh Afdola, Afdola Agussani Mendefa Ahmad Zulfahmi aida ningsih, nur Aidil Irvan Aisenodni, Aga Fifty Al Fajri S aliya setiyani, metty Amaliah, Novi Amirah Mardhiyah anda restu, delpa Andesca, Yofi Devara Andri Hendrizal Andri Yosia Anggi Wulandari Annisa Nur Aliyah Anri M Shaleh Deana, Anri M Shaleh Anugrah Aurora Dhearesta Anugrah Aurora Dhearesta Arif Riandra Auliya, Rizki Ayu Lestari Ayu Puspita Sembiring Azyzi Syahren Revina Bunga Cantika Bunga Cantika chaniago, alfi Citra Panjaitan Dani Yosi R.Sibarani David Sibarani Desenieli Harefa Desi Rahmadani Siagian Deta Anjellyta Deta Anjellyta Divo Afrianto Eka Wahyu Ningsih Enggar Akbar Nur Izza Erica Silvia Erlangga Putra Fajri, Muhammad Nur Febri Ridho Putra Febri Ridho Putra Febri Samuel L.G Febri Samuel L.G Febrico Febrico Ferdhi Aulio Rahmad fitriyasari Fx. Jodhi P.U Geri Gunawan Geri Gunawan Gunawan, Geri Halil, Fitrahadi Hamdan Alawi Hamdan Alawi Hana Delia Hutabarat Herlita Noveni Samosir Husnaini, Radiatul Iesje Lukistyowati Iesje Lukistyowati Indra Lesmana Indra Lesmana Irdoni HS Irma Apri Nanda Irwan Effendi James Parlindungan Panjaitan Khairani Putri, Khairani Khairudin Khairudin Khairudin Khairudin Khairudin Khairudin Kurniawan, Dhidy Lala Indriani Lukisyowati, Iesje Mahdi Arif Siregar Malik Malik Manurung, Roy Andre Parsaoran Marni Anita Silalahi Marni Anita Silalahi Masjudi, Heri Mhd Andry Kurniawan Mika Handayani Muhammad Ahlun Nazar Muhammad Andryan Juliardy Muhammad Andryan Juliardy Muhammad Arief Wibowo Muhammad Fadil Ghifari Muhammad Fadil Ghifari Muhammad Fakhrusy Syakirin Muhammad Firdaus Muhammad Ilham Syarif Muhammad Ilham Syarif Muhammad Nur Fajri Muhammad Sorim Arkan Muhammad Syarif, Muhammad Mulyadi , Mulyadi Mulyadi . Mulyadi Mulyadi Mutya Syaraswati Nababan, Fatisah Nadya Oviantari Lubis Nazar, Muhammad Ahlun Netti Aryani Niken Ayu Pamukas Niken Ayu Pamungkas Nirwan Fadli Pulungan nopika, depi Nova Sintya Sary Novendri, Rizki Novreta Ersyi Darfia Nugie Nugraha Nur Asiah Nur Asiah NUR FADILAH Nuraini El Fajri Nuraini Nuraini Nurhidayatina Kamil, Nurhidayatina Nursal Nursal Nurwijayanti Oky Priawan Operiman Hulu Pandiangan, Dian Pramanda Panuturi Julianto Siboro Puji Haryadi Puspita Dewi Putra, Febri Ridho Putri Tri Ghaziah Radhiansyah Fikri Radhiansyah Fikri Radiatul Husnaini Radiatul Husnaini Rafika, Fitria Rahmat Kurniawan Rahmat Kurniawan Rahmat Kurniawan Rangkuti, Putra Raudah, Peggi Rehma Natalia Silaban Retno Tri Pratiwi Rian Hidayat Riatman Cahyadi, Riatman Ridho Ahadana Riga Oganda Riko Martinus S Rima Maisarah Riski Rahmadana Riza, Subkhan Rizky Rinaldi Roma Uli Purba Ronal P Sianturi Ronna Ginting Roy Andre Parsaoran Manurung Rudy Agam Rudy Hartawan Rambe, Rudy Hartawan Rusliadi Rusliadi Ruthmawati, Abigael Saberina Hasibuan Samuel LG, Febri Samuel Sitorus Santi Ramayani Santi Ramayani, Santi Sella Nur Happy Sembiring, Ayu Puspita Septia Nursa Shafira Nurjannah Silalahi, Marni Simangunsong, Gidion Simbolon, Lensofa Sirait, Lestari Roindah Siska Wulan Sari Sitanggang, Firnando Sitorus Sitorus Slamat Harianto Sukran Slamat Harianto Sukran Sofwan Said Daulay Soufyana Zahra Minda Soufyana Zahra Minda Subiantoro, Yusuf Sukran, Slamat Harianto Sunarto Sunarto Syahputra Syahputra Syakirin, Muhammad Fakhrusy T. Nalacintia Miazara T. Nalacintia Miazara Tampubolon, Irma Megawati Tomi Ramadona Triani Cahya Fitri Sabilah Triani Cahya Fitri Sabilah Trisla Warningsih Warman Fatra, Warman Winda Sari Yudho Harjoyudanto Yudho Harjoyudanto Yuliani Yuliani Yustina Yustina