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Efriyeldi, Efriyeldi
Fakultas Perikanan Dan Kelautan, Universitas Riau
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Sebaran Nitrat, Fosfat dan Kelimpahan Fitoplankton di Muara Sungai Kampar Kabupaten Pelalawan Arbianti, Purnama; Nurrachmi, Irvina; Efriyeldi, Efriyeldi
Jurnal Perikanan dan Kelautan Vol 22, No 2 (2017)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.22.2.1-9

Abstract

Masuknya massa air pasang dalam jumlah yang besar di muara Sungai Kampar disebutmasyarakat setempat sebagai bono. Bono merupakan fenomena alam yang disebabkanoleh gelombang pasang yang bertemu dengan arus Sungai Kampar. Arus pasang surutdi muara Sungai Kampar dapat mempengaruhi penyebaran nitrat, fosfat dan kelimpahanfitoplankton. Fitoplankton adalah tumbuhan renik yang hidup melayang di perairandan pergerakannya sangat tergantung pada arus. Penelitian ini dilaksanakan pada bulanJanuari 2017 di muara Sungai Kampar, Pelalawan yang bertujuan untuk mengetahuisebaran nitrat, fosfat serta hubungannya dengan kelimpahan fitoplankton denganmenggunakan metode survey. Metode pemilihan lokasi dengan purposive samplingyang dilakukan di tiga stasiun saat pasang menuju surut dan surut menuju pasang denganpertimbangan telah mewakili wilayah muara Sungai Kampar. Hasil penelitianmenunjukkan bahwa sebaran nitrat, fosfat dan kelimpahan fitoplankton akan semakinkecil menuju ke arah laut dan yang terjadi saat pasang menuju surut lebih tinggi dibandingsaat surut menuju pasang. Sebaran kelimpahan fitoplankton lebih dipengaruhinitrat dibandingkan fosfat. Berdasarkan data tersebut dapat diketahui bahwa nitrat danfosfat bersumber dari sungai.
Karakteristik Habitat dan Populasi Kerang Bambu (Solen lamarckii) di Zona Intertidal Desa Teluk Lancar Kecamatan Bantan Kabupaten Bengkalis Ramadhan, Muhammad Farizqy; Nasution, Syafruddin; Efriyeldi, Efriyeldi
Jurnal Perikanan dan Kelautan Vol 22, No 1 (2017)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.22.1.36-43

Abstract

Kerang bambu merupakan salah satu jenis moluska dari famili solenidae yang mempunyainilai ekonomis. Penelitian ini dilaksanakan pada bulan Februari 2017 bertempatdi Pantai Desa Teluk Lancar Kecamatan Bantan Kabupaten Bengkalis. Penelitian inibertujuan untuk mengetahui karakteristik habitat, kelimpahan dan pola distribusi kerangbambu. Metode yang digunakan dalam penelitian ini adalah metode survei. Penentuanlokasi pengambilan sampel dilakukan secara purposive sampling. Pengukurankualitas perairan dilakukan secara in situ dan ex situ yang terdiri dari parameter fisikadan kimia perairan. Karakteristik habitat kerang bambu yaitu jenis substratnya pasirdengan klasifikasi pasir sangat halus. Bahan organik sedimen tergolong rendah dansangat rendah 0,907-1,749 %. Padatan tersuspensi tergolong sangat tinggi 223-1830mg/l. Parameter kualitas perairan masih mendukung untuk kehidupan kerang.Kelimpahan rata-rata adalah 0,88/m2, kelimpahan tertinggi terdapat di subzona 5(zona lower) atau surut terendah dan kelimpahan terendah pada subzona 3 (zona middle)atau zona tengah intertidal. Pola distribusi rata-rata bersifat mengelompok. Ukurankerang yang ditemukan memiliki panjang 45-93 mm dengan berat 1,91-9,67 g.
TOXICITY TO Artemia salina AND PHYTOCHEMICAL COMPONENTS OF Thalassia Hemprichii SEAGRASS ON NIRWANA BEACH PADANG CITY WEST SUMATERA PROVINCE Arifin, Adani Fatahilal; Nurrachmi, Irvina; Efriyeldi, Efriyeldi
Jurnal Perikanan dan Kelautan Vol 25, No 3 (2020)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.25.3.163-171

Abstract

Many of marine ecotourism activities on Nirwana Beach has had a negative impact to the development of seagrass ecosystems. Pressure that occurs on the coastal ecosystem becomes a trigger factor seagrasses to adapt with produce certain compounds for maintain immunity, the name is bioactive compounds. This research was aimed to know toxicity to Artemia salina and phytochemical component of Thalassia hemprichii seagrass from Nirwana Beach by using experimental method. Two seagrass extracts with different solvents have been made in the Marine Chemistry Laboratories for use in toxicity and phytochemical tests. The results of the test are displayed in tabular or graphical form and analyzed descriptively. The results of toxicity testing showed that seagrass had a toxicity level of 446.872 ppm (n-hexane solvent) and 218.183 ppm (methanol solvents), both of extract are toxic to the Artemia salina. Phytochemical testing shows tannin compounds founded in extracts with n-hexane and methanol solvent, alkaloids and triterpenoids compound contained in extracts with methanol solvent.
Struktur Komunitas Makrozoobenthos Pada Hutan Mangrove Di Desa Mengkapan Kecamatan Sungai Apit Provinsi Riau Nababan, Sitty Mey; Efriyeldi, Efriyeldi; Nasution, Syafruddin
Jurnal Perikanan dan Kelautan Vol 22, No 2 (2017)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.22.2.24-33

Abstract

Penelitian ini dilaksanakan pada bulan Januari - Februari 2017. Penelitian ini bertujuanuntuk mengetahui struktur komunitas makrozoobenthos pada hutan mangroveDesa Mengkapan, Kecamatan Sungai Apit Provinsi Riau yang meliputi: jenis makrozoobenthos,kepadatan, keanekaragaman, dominasi, keseragaman dan pola distribusimakrozoobenthos. Metode yang digunakan dalam penelitian ini adalah metode survey.Sampel sedimen diambil dari 3 Stasiun. Pengambilan sampel makrozoobenthos dilakukanmenggunakan plot berukuran 1m x 1m. Analisis dan identifikasi dilakukan di laboratoriumbiologi laut, Fakultas Perikanan dan Kelautan, Universitas Riau, Pekanbaru.Berdasarkan hasil penelitian diperoleh makrozoobenthos yang ditemukan terdiridari 3 kelas yaitu gastropoda, bivalvia, dan crustacea. Kelimpahan makrozoobenthosberkisar 58,3 - 90 ind/m2. Kelimpahan relatif tertinggi pada stasiun 1 yaitu spesiesNerita sp (34,7%), pada stasiun 2 yaitu spesies Cassidula aurisfelis (17,2%) dan stasiun3 yaitu spesies Telescopium telescopium (22,3%). Keanekaragaman (H’) padastasiun-stasiun penelitian berkisar 2,08-2,21, indeks dominansi (C) pada stasiun-stasiunpenelitian berkisar 0,23-0,26, indeks keseragaman (E) pada stasiun-stasiun penelitianberkisar 0,45-0,50 dan pola distribusi makrozoobenthos (Id) berkisar antara 1,02-1,05(mengelompok).
ANALISIS FEKUNDITAS DAN DIAMETER TELUR KERANG BAMBU (Solen lamarckii, Chenu 1843) DI ZONA INTERTIDAL DESA API-API KECAMATAN BANDAR LAKSAMANA KABUPATEN BENGKALIS Langsana, Laila; Nasution, Syafruddin; Efriyeldi, Efriyeldi
Jurnal Perikanan dan Kelautan Vol 25, No 3 (2020)
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.25.3.216-223

Abstract

Bamboo clam (Solen lamarckii) is a type of mollusck of the Solenidae family known as “sepahat” by the people around Bengkalis. This study was conducted at Api-Api village waters, Bengkalis Regency  in January 2020. This study aims to investigate the fecundity produced by each female of  bamboo clam and egg diameter in each phase of maturity gonad stage. This study used survey method and sampling location determined by simple random sampling. Fecundity was calculated using the modificated volumetric method. The result showed, the fecundity of bamboo clam ranged from 290,325-1,902,391 with an average 1,105,285 ±1,074,724 eggs  for 50.3-72.8 mm in shell length. Egg diameter ranged between 30-110 μm. Average diameter in each phase of maturity gonad stage, the stage I gonads was 46.7 μm, stage II 65.2 μm, stage III 82.8 μm and stage IV 101 μm.
STRUCTURE COMMUNITY OF MANGROVE FOREST IN NORTH COASTAL RUPAT ISLAND DISTRICT OF BENGKALIS RIAU PROVINCE Nasution, Muhammad Rasid; Samiaji, Joko; ', Efriyeldi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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

Abstract

This research was conducted in January 2017 in north coastal rupat island district of bengkalis riau province. The purpose of this researches is to determine the structure community of mangroves in rupat island. The method used in the research was transect line method and plot. The result of observation in North Rupat Island showed the existence of mangrove vegetation that comes the 17 species and 7 families. The species of most dominating growth was Rhizophora apiculata has important values and high density than other species was value 288.9 ind/ha. The second of high density was Rhizophora mucronata with value 144.4 ind/ha. So, the species of Rhizophora apiculata and Rhizophora mucronata is the species capable of grow well on each environment in north coastal rupat island district of bengkalis riau province. Researchers also identify zoning mangrove vegetation.Keywords : Rupat Island, Structure Community, Mangroves, Rhizophora1Student of
Distribusi dan Nisbah Kelamin Kerang Lokan (Polymesoda expansa) di Perairan Pantai Desa Sungai Bela Kecamatan Kuala Indragiri Kabupaten Indragiri Hilir ', Zefendra; ', Efriyeldi; ', Elizal
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

Penelitian ini dilaksanakan pada bulan Mei 2014. Eksploitasi kerang lokan (P.expansa) yang dilakukan nelayan selama ini tanpa memperhatikan ukuran yangditangkap mulai dari yang besar sampai yang relatif kecil. Tujuannya untukmengetahui distribusi dan nisbah kelamin kerang lokan. Metode survey digunakanpada 3 zona intertidal, selanjutnya dilakukan analisis sampel dilaboratorium.Kelimpahan kerang lokan tertinggi ditemukan pada zona upper sedangkankelimpahan yang terendah ditemukan pada zona lower. Nisbah kelamin pada zonalower seimbang, sementara zona middle dan upper sebaliknya, namun rata-ratanyaseimbang. Pola distribusi mengelompok pada zona upper dan merata pada zona lowerdan middle (Indeks morisita 1,052 dan 0,643) Analisis Chi – square memperlihatkansebaran yang tidak acak (χ2 hitung ˂ χ2 tabel).Kata kunci: Kerang Lokan (P. expansa), Distribusi, Nisbah Kelamin
Persepsi dan sikap masyarakat terhadap perlindungan dan pengelolaan mangrove di Kecamatan Sungai Apit Kabupaten Siak Fatonah, Siti; Hamidy, Rasoel; Mulyadi, Aras; Efriyeldi, Efriyeldi
Dinamika Lingkungan Indonesia Vol 9, No 1 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.517 KB) | DOI: 10.31258/dli.9.1.p.64-71

Abstract

Mangrove forest in Sungai Apit Sub District, Siak District, Riau is one of the mangrove ecosystems in Riau Province which has experienced a reduction in land area and is the widest in Siak Regency. This study aims to determine the perceptions and attitudes of the community in the protection and management of mangroves. The research was conducted in three villages in Sungai Apit Sub District, namely Rawa Mekar Jaya, Sungai Rawa and Mengkapan. Data was collected through observation and interviews with the community using mangroves. The results showed that the perception of the community in Sungai Apit towards the function and management of mangroves is classified as very good, while the attitude of the community towards the protection and management of mangroves is classified as good. The perception and attitude of the people of Rawa Mekar Jaya and Meng Kapan are better than the people of Sungai Rawa. Community involvement in rehabilitation activities is generally only at the time of the project and due to wages. The community has a high awareness of utilizing mangrove resources in a sustainable manner. The community has a high awareness of the protection and management of mangroves, but their involvement in rehabilitation activities requires money to compensate for the time and energy used. Therefore, alternative activities are needed that can increase funding sources and increase funding sources in local institutions related to mangroves.
Kondisi mangrove di pesisir timur pulau Jemaja Kepuluan Anambas Andrito, Wahyudi; Nasution, Syafruddin; Efriyeldi, Efriyeldi
Dinamika Lingkungan Indonesia Vol 7, No 2 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.776 KB) | DOI: 10.31258/dli.7.2.p.70-80

Abstract

 Mangrove ecosystems are one of three important ecosystems in the coastal areas that supports global warming mitigation efforts. The existence of mangrove forests is needed to reduce the increased CO2 concentrations in the atmosphere. However, the rise of the water temperatures and sea levels indirectly affects the presence and condition of mangrove forests in coastal areas. The purpose of this study is to determine the condition of the mangrove community on the East Coast of Jemaja, Anambas Archipelagoes Regency. The survey method  was used in this study and a series survey activities were conducted for a quadrant transect with a size of 10m by 10m in December 2019 - March 2020.The result shown that the five mangrove species were identified, such as Rhizophora apiculata, R. mucronata, Bruguiera gymnorrhiza, Ceriops tagal and Xylocarpus granatum. R. apiculata dominates with an important value index of 123.12%. While, the average density of mangroves and saplings in the study area was 3155 ± 785 individuals/ha and the average canopy cover was 84.03 ± 3.11%. With this finding, it can be concluded that the condition of mangroves in the East Coast of Jemaja is very dense and still in a good condition.
Comparative Morphometric Rhizophora ApiculataFlower and Fruit in Two Areas with Anthropogenic Activities in West Dumai Coastal, Dumai City, Riau Province Fernando, Muhammad Zebi; Efriyeldi, Efriyeldi; Mulyadi, Aras
Jurnal Natur Indonesia Vol 19, No 1 (2021): April 2021
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.1.23-28

Abstract

Morphometrics is a field that deals with variations and changes in the form (size and shape) of an organism or object. Anthropogenic is a human activity not only limited to the use or utilization of coastal resources, but also can be restorative and protective, thus causing complex disruption. The purpose of this study was to determine the morphometric differences of the flowers and fruits of R.apiculata mangroves in two regions with different anthropogenic activities in the mangrove ecosystem of Dumai City. This research was carried out in September 2019. From the results of the study it was found that in areas polluted by anthropogenic activity the average morphometrics of fruit (length and width) and leaves (length, width and length of the stems) Rhizophora apiculata were lower than those in the area not polluted by anthropogenic activity. At station I the oil content ranged from 0,0975 to 0,1251 ppm classified as polluted and at station II ranged from 0,072 to 0,111 ppm classified as not polluted.
Co-Authors ', Zefendra ', Zulkifli AA Sudharmawan, AA Abdullah, Ikhlas Abiyu Rohid Adani Fatahilal Arifin Adila, Melin Adiyatma, Patwa Afrizal Tanjung Agnesia, Yohana Agus Mandar, Agus Agus Sutikno Agusti, Dianda Roaana Agusti, Dinda Roanna Ahmad Pasmuji Ahmadryadi_ahmadryadi Ahmadryadi_ahmadryadi Akmal Hawari Alfiana, Dewi Alghani, Muhammad Roif Alpian Alya, Alya Ananda, Nahdya Nasri Andreas Situmorang Andrew ST OS Andri Hendrizal Andrito, Wahyudi Angelia E Bernike Zebua Anggina, Viona Novi ani ani Anugrah, Muhammad Dea Aprizon Putra Aras Mulyadi Arbianti, Purnama Ardiana, Eka Ariaz, Panji Ahmad Arif Rahman Hakim Arifin, Adani Fatahilal Arlius Arlius, Arlius Arniati, Dina Asma Husna Putri Asma Ul Husna Putri Ayuni, Putri Bagas Ariya Pambudi Bahari, Sandy Batubara, Ummi Mardhiah Bintal Amin Bona Juandi Bonawi Sihombing Bonita Tiolina Exaudi Budijono, Budijono Burhan Marbun Cahyo, Bintang Dwi Cut Shifa Nedi Dame, Jupparoh Caisar Van Dandi Arianto Pelly David Raymond Sianturi Dedi Afandi Defri Yoza Dela Haryani Dermawan, Ernanda Putra Desmarina, Y. Despela, Despela Dessy Yosswaty Dessy Yoswaty Dessyka Febria, Dessyka Destriana Destriana Dewi Alfiana Dewi, Delviana Dianda Roanna Agusti Dietriech Geoffrey Bengen Doni Gunawan Tampubolon Dwigantara, M. Fadhol Eko Prianto, Eko Elfind Laoli Elfis Suanto Elizal, Elizal Endi Setiadi Eni Sumiarsih Enny Herawaty Simamora Erick Palatema Esti Nur Rahayu Esti Nur Rahayu Exaudi, Bonita Tiolina Fachry Abda El Rahman Fajriani Ananda Fajriani, Annisa Farona, Fella Fazli Pasha Amri Febrianto Roby Mukhti Fernando, Muhammad Zebi Fia Novianty Fitria Roza Fitriani, Ersa Friska Maulidah Fuadi, Indra Gavion Roston Sitepu Ginting, Dya Indriati Br Ginting, T.B. Gita Purnama Sari, Gita Purnama Gusfi, Melly Hadi Sastranegara Hadiyatma, Patwa Halida Sisda Harahap Hanryani, Putri Hapzi Ali Harahap, Anugrah Setiadari Hardianto Andita Harry Leonardo Barutu Hasan, Masyhuda Hasanah, Siti Umiyatul Hasyim, Ardhan Fadhlani Hendra Taufik Herrys V Silalahi Hersa, Tania Hesty Widyaningsih Homsatun, Nuning Hutomo, Ragil Tribhakti Ida Ayu Putu Sri Widnyani Ikhsan Setiawan Ilham hidayat Ilham Ilahi Imanuel, Andrean Nggara Imran , Imran Imran Imran Indra Bayu Pratama Indradewa, Rhian Inel Vivi Elvia Inka Wahyuni Intan, Selpia Irvina Nurachmi Irwan Effendi Iskan Fami Jumaidi Isnaini, Siti Joko Samiaji Josua Simanjuntak, Josua Judika Nursiani Sipahutar Jufri Jufri Jufri Jufri Junika Cecelia Putri Jupri, Tahany Nur Fadhilah Jupri, Tahany Nur Fadhillah Kaharudin, Zakaria Karnila, Rahman Karnila Kartina ' Khairunnisa Khairunnisa Khawarizmi, Dannes M. Kholida, Azzahra Kristoper Aritonang Laila Langsana Laksono Trisnantoro Langsana, Laila Laoli, Elfind Lee, Seung Hun Lianov, Dea Lieng, Lieng Lubis, Abdillah Lucky Syarif M, Ridwan Rafsyanjani. M. Fadhol Dwigantara M. Subkhan Riza Maria Erna Martha, Rezky Dwi Matondang, Ridwan Rafsyanjani Maulana, Agung A. Mayrany, Sri Eva Meitasuri, Gevi Mia Fatma R Miswadi Miswadi Mubarak Mubarak Mubarak Mubarak Muhammad Aulia Rahman Muhammad Farhan Muhammad Rafsan Zain Muhammad Rizki Fadly Muhammad Rizky Rinaldi Muhammad Rusdi Muhammad Sabirin Muhammad Syarif Muhammad Zebi Fernando Muhammad Zebi Fernando Muhammad Zulkifli, Muhammad Mukhlis Alfarys Musrifin Galib Musrifin Ghalib Musrifin Musrifin Nababan, Sitty Mey Nabila, Chici Nabilah Jauharah Nadeak, Paulinus Nadida, Putri Nadiyatus Sholihat Nadratul Jamila Nasution, Fadli Ripai Nasution, Muhammad Rasid Naufal Sidqi Nawari Nawari Nawari Nawari, Nawari Noel GM Situmorang Novia Suci Yanti Novri Ditama Syafni Nuning Homsatun Nurafni, Melia Nurmalahayati, Yasinta Nursyirwani, Nursyirwani Oktari, Mela Oktaria, Rusiani Pambudi, Bagas Ariya Panggabean, Iis Panggabean, Iis Apriati Panji Ahmad Ariaz Patwa Hadiyatma Paul Rozeki Sinaga Pohan, Rizal Suardiman Pramita, Wisnu Pratama, Muhammad Dandy Syifa Prayitno, Betari Erlinda Putri Ayuni Putri Rifdayati Putri, Dinda Maharani Putri, Rahmi Putri, Rahmi Delima Putrianfi, Nadhifah Asilah Rafsyanjani M, Ridwan Rahma Eka Putri Rahmadhani, Tami Fitri Rahmi Susanti Rahmita, R. Raja Rahmita Ramadani Safitri Ramadhan, A.R Ramadhan, A.R. Ramadhan, Muhammad Farizqy Rangga Wardana Rasoel Hamidy Razid, Muhamad Renata, Vivien Reny Cristina Naibaho RIDWAN AFFANDI Ridwan Manda Putra Rifaldi Rifaldi, Rifaldi Rifardi Rifda Syofiana R Rifdayati, Putri Rini, Yulia Sapta Rivaldi, Rahmat Rizki Dwi Yezelkiel Rizki, A. Romie Jhonnerie Ronal Kurniawan Rosiana, Kenny S. Pane, Rolis Sabirin, Muhammad Safatriani Safatriani Safitri, Winda Santi Maya Sari Saputra, Rengki Sari, D.J. Sari, Dwi Julita Sari, Lita Sari, Nova Iman Savita, Dinda Sihombing, Kelvin Simamora, Enny Herawati Siregar, , Yusni Ikhwan Siregar, Ali Mora Hadamean Siregar, Rifa Ghina Aulia Siti Anisah Siti Fatonah Siti Hasanah Siti Umiyatul Hasanah Sitorus, Tiroy Sofyan H. Siregar Sofyan Husein Siregar Sonya Marunjung P.Hsb Sri Murtin Sufaidah, Siti Nur Sujianto Sujianto Sujianto Sujianto Sukendi Sukendi Sulistio, Hendra Tri Suparno . Suzila ' Syafrhani, Wan Nabila Syafrizal Syafrizal Syafruddin Nasution Syahril Nedi Syamsiar, Syamsiar Syawfy Luthfiandra Taat Mujaid Arifin Tania Hersa Tanjung, Lismawati Tengku Mutia Smita Dwivayana Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Tri Lestari Tri Prartono Triatama, Putri Zulfa Trisla Warningsih Uswatun Hasanah Vichi Apridianti Vivien Renata Wahyu Novra Wanda Wahyudi Wahyudi Wanda Syahrian Wardana, Rangga Wulan Cempaka Sari.S Yahya Benardus Sihombing Yanti, D.H. Yehezkiel, Rizki Dwi Yeli Hartuti Yetti Elfina Yohanna Siagian Yona, Fitria Mai Yosua Afrianus P Yulinda, Emelda Yusni Ikhwan Siregar Zain, Rahmita Firda Zakaria Kaharudin Zaki, Raihan Zientika, Zientika Zulhendri Zulhendri Zulkifli ' Zulkifli Zulkifli Zulkifli Zulkifli