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Efriyeldi, Efriyeldi
Fakultas Perikanan Dan Kelautan, Universitas Riau
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Relation Macrozoobenthos with Sediment Organic Material in the Intertidal Zone in Selat Baru Beach, Bengkalis Regency, Riau Province Pramita, Wisnu; Efriyeldi, Efriyeldi; Galib, Musrifin
Journal of Coastal and Ocean Sciences Vol. 2 No. 2 (2021): May
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Selat Baru Village was one of several beaches on Bengkalis Island which was located in the northern part of Bengkalis Island. Selat Baru Beach is a tourist spot that has the most visitors every day, especially during the Eid holidays. In addition, there are rivers, ports, and boat crossings also taking place on Selat Baru Beach. The purpose of this study was to determine the content of sediment organic matter, the type and abundance of macrozoobenthos, and to determine the relationship between the organic matter of sediment and the abundance of macrozoobenthos in the New Strait coastal waters. The method used was a survey method, where the data collected was primary data which was then analyzed statistically and discussed descriptively. The results of measurements of oceanographic parameters from the research location have an average temperature of 28,67 oC, and pH of 7, a salinity of 26,33 ‰, transparency of 24,33 cm, and a current velocity of 0,1 m/s. The average sediment content obtained at station 1 was 1,42%, station 2 was 0,77%, and station 3 was 7,34%. The percentage of sand fraction has the highest percentage at station 1 substation 3 (95,56%) and the lowest at station 3 substation 3 (39,78%), while the highest percentage of mud fraction was at station 3 substation 3 (54,19%) and the lowest found at station 2 substation 1 (4,15%). The macrozoobenthos found were from the Bivalvia class (Corbicula sp, Lucinidae sp, Anomia sp) and the Gastropod class (Nucella sp, Rabdotus sp, Cerithidea sp) and the Malacostraca class (Hermigrapsus sp). The average abundance of macrozoobenthos found at station 1 was 4,22 ind/m2, station 2 was 4,22 ind/m2, and station 3 was 10,67 ind/m2. The result shows the effect of the sludge sediment fraction on the abundance of macrozoobenthos has a coefficient of determination (R2) with a value of 0,9015 and a correlation coefficient (r) with a value of 0,9495 meaning that 90,15% of macrozoobenthos abundance was influenced by sediment fraction and the rest was influenced by other environmental factors
Length-Weight Relationship and Sex Ratio Blood Clam (Anadara granosa) in Rangsang Barat Waters Kepulauan Meranti District, Riau Province Efriyeldi, Efriyeldi; Siregar, Yusni Ikhwan; Siregar, Sofyan Husein
Jurnal Perikanan dan Kelautan Vol. 27 No. 2 (2022): June
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Anadara granosa is one of the bivalves that are often found in public markets. This study aimed to study the relationship between length-weight and sex ratio of blood clams (A. granosa) in the coastal waters of West Rangsang. Sampling was carried out every month at three stations. Shells were collected from a 1 x 1 m2 plot on a quadratic transect. The relationship between length and weight was analyzed by regression analysis. The sex ratio between the number of female and male blood clams in each month of sampling was calculated and followed by the Chi square test to test the similarity. The results showed that the relationship between length and weight of A. granosa was positive allometric. The sex ratio of female and male blood clams in the waters of West Rangsang is not balanced. The number of male blood clams is more than the female.
Epizoic Diatom Community Structure in Snails Cerithidea obtusa and Nerita articulata in the Mangrove Ecosystem, Dumai City, Riau Province Renata, Vivien; Siregar, Sofyan Husein; Efriyeldi, Efriyeldi
Jurnal Perikanan dan Kelautan Vol. 28 No. 2 (2023): June
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

The purpose of this study was to determine the type, abundance, and community structure of epizoic diatoms attached to the shells of the snails Cerithidea obtusa and Nerita articulata in the mangrove ecosystem of Dumai City, Riau Province. This research was conducted in January 2022. A sampling of snail shells took place in the mangrove ecosystem of the city of Dumai, Riau Province, and was identified at the Marine Chemistry Laboratory, Department of Marine Science, Faculty of Fisheries and Marine, Universitas Riau. Based on the research that has been done, the results show that there are 13 genera of epizoic diatoms consisting of 5 genera centrales and 8 genera of pennales order. The highest abundance of epizoic diatoms in C.obtusa snail shells was at station II with a value of 29,687 ind/cm2. While the highest abundance of epizoic diatoms in N.articulata shells was at station I. Based on the average values ​​​​of diversity index (H'), dominance index (D), and uniformity index (E) it can be concluded that epizoic diatoms in C.obtusa and N.articulata have a moderate biota community balance value, moderate polluted water quality, no dominant species and unbalanced organism uniformity and food competition occurs.
Types and Abundance of Microplastics in Meretrix meretrix Clams and Sediments in the Sri Tanjung Coastal Area, Rupat Sub-District, Bengkalis Lestari, Tri; Amin, Bintal; Efriyeldi, Efriyeldi
Jurnal Perikanan dan Kelautan Vol. 30 No. 2 (2025): June
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.30.2.233-238

Abstract

This study was conducted in August 2024 in the coastal area of Sri Tanjung Village, Rupat Sub-district, Bengkalis Regency. The objectives of this research were to identify the types and abundance of microplastics, examine the differences in microplastic abundance across sizes, analyze the relationship between microplastic abundance and size (shell length and total weight), and explore the relationship between microplastic abundance in Meretrix meretrix clams and sediments. A survey method was used. Random sampling of M. meretrix was carried out using small shovels and traditional fisher tools (iron rakes) during the lowest tidal conditions. Results indicated that water quality parameters in Sri Tanjung were relatively good, with temperatures of 28–31°C, salinity ranging from 21–26%, brightness values between 19–25 cm, and pH values of 7–7.7. Types of microplastics found in M. meretrix and sediments in the coastal area included fragments, fibers, and films, with an average microplastic abundance of 55.16 particles/g and 1310 particles/kg, respectively. The abundance of microplastics was categorized based on the morphometric size of clams: small (61.32 particles/g), medium (45.01 particles/g), and large (59.16 particles/g). Sediments showed an average abundance of 1310 particles/kg. Fragment-type microplastics were the most dominant in both clams and sediments, with average abundances in small clams (29.22 particles/g), medium clams (21.29 particles/g), large clams (62.27 particles/g), and sediments (541.3 particles/kg). Film-type microplastics were the least abundant, with average values in small clams (14.44 particles/g), medium clams (10.80 particles/g), large clams (13.05 particles/g), and sediments (319.3 particles/kg). A one-way ANOVA test revealed significant differences (p < 0.05) in microplastic abundance between small and medium and medium and large clams but not between small and large clams (p > 0.05)
POPULATION STRUCTURE AND HABITAT CHARACTERISTICS OF CLAM (Meretrix meretrix) IN THE INTERTIDAL ZONE OF TELUK LANCAR VILLAGE, BENGKALIS REGENCY Ardiana, Eka; Zulkifli, Zulkifli; Efriyeldi, Efriyeldi
Asian Journal of Aquatic Sciences Vol. 8 No. 2 (2025): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.8.2.159-166

Abstract

Clam (Meretrix meretrix) is an economically and ecologically significant bivalve mollusk. This study aimed to determine the population structure and habitat characteristics of M. meretrix in the intertidal zone of Teluk Lancar Village, Bengkalis Regency. The research employed a survey method from November 2024 to February 2025, focusing on one station divided into three subzones (Upper, Middle, Lower). Results revealed that the sediment substrate was predominantly sandy mud with organic matter content ranging from 0.5% (middle zone) to 2% (upper zone). The highest abundance of M. meretrix was found in the middle subzone (3.1 ind/m²), while the lowest was in the upper subzone (2.0 ind/m²). No significant differences in abundance were observed between stations or intertidal subzones. Size distribution analysis revealed that the 2.68-3.17 cm class was the most common (15 individuals), while the 1.18-1.67 cm and 4.16-4.67 cm classes were the least represented (1 individual each). The distribution pattern of M. meretrix was uniform (Id < 1).
Macrozoobenthos Community Structure at Teluk Marunggai Beach, Nagari Sungai Nyalo, Pesisir Selatan District, West Sumatera Province Ariaz, Panji Ahmad; Zulkifli, Zulkifli; Efriyeldi, Efriyeldi
Tropical Marine Environmental Sciences Vol. 2 No. 2 (2024)
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/tromes.2.02.42-50

Abstract

Teluk Marunggai Beach, Nagari Sungai Nyalo, is one of the new tourist areas in Pesisir Selatan Regency which, over time, will begin to be in demand by tourists, which will have an impact on the life of the biota on the beach, one of which is macrozoobenthos. This research was conducted in March 2023 in the Intertidal Zone of Teluk Marunggai Beach, Sungai Nyalo Village, Koto Ampek Tarusan District, Pesisir Selatan Regency, West Sumatra Province. The purpose of this study was to determine the type and abundance of macrozoobenthos species in the coastal waters of Marunggai Bay and to determine the diversity, uniformity, dominance and distribution patterns of macrozoobenthos in the coastal waters of Marunggai Bay. The research method used is the survey method, where the sampling using the quadrant transect method is carried out at three stations. The research results found 40 species of macrozoobenthos. The most common species found at all stations were Turbo cinereus from the Turbinidae family and the Gastropod class. The macrozoobenthos abundance values ​​obtained ranged from 6.44–6.67 ind/m2. Species diversity index values ​​ranged from 3.06–3.52, namely high. Uniformity index values ​​ranged from 3.02 to 3.14, high uniformity, dominance index values ​​ranged from 0.10 to 0.15; no species dominated, and the value of the distribution pattern ranged from 2.959 to 2.962 with a group distribution pattern
Analysis of Mangrove Forest Health in the Coastal Area of Kutawaru Village, Cilacap Regency, Central Java Oktaria, Rusiani; Efriyeldi, Efriyeldi; Zulkifli, Zulkifli
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.150-156

Abstract

Mangroves are forests that grow in coastal areas and play a crucial role in maintaining environmental balance, as the health of this ecosystem significantly impacts the stability of coastal areas and the survival of communities that depend on natural resources. This study aims to analyze the Mangrove Health Index (MHI) in the coastal area of Kutawaru Village, Cilacap Regency, Central Java. The transect method was used at three research stations representing mangrove forests. The observed parameters included type identification, canopy cover, stem diameter, and density of trees and saplings. A total of 14 mangrove species were identified, with Rhizophora apiculata as the dominant species, having the highest Importance Value Index (IVI) of 104.69%. The highest tree density is found at Station 3, with a value of 4,611.11 trees/Ha, and the average canopy cover is 80.8%, which is classified as very dense. The average MHI value of 73.74% shows that the condition of the mangrove ecosystem in this region is relatively good. The results of this study are expected to serve as a reference for the formulation of sustainable mangrove management and conservation policies
Heavy Metal (Pb, Cu, and Zn) Content in Geloina erosa and Cerithidea obtusa from the Western Coast of Dumai, Riau Province Fajriani, Annisa; Amin, Bintal; Efriyeldi, Efriyeldi
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.166-173

Abstract

Industrial and shipping activities in coastal areas have the potential to increase heavy metal pollution, which can accumulate in marine organisms and impact food safety. On the west coast of Dumai, Geloina erosa and Cerithidea obtusa are widely consumed by the local community, making it important to study their heavy metal content. This study aims to analyse the levels of Pb, Cu, and Zn in the soft tissues of these two species and compare the differences between species and sampling locations. The study was conducted in February 2025 at two stations: Station 1 (Purnama) and Station 2 (Pangkalan Sesai). Samples were collected using purposive sampling and analysed using Atomic Absorption Spectroscopy (AAS). The results showed that the average Pb, Cu, and Zn content in G. erosa were 6.79 µg/g, 6.13 µg/g, and 8.36 µg/g, respectively, while in C. obtusa they were 7.09 µg/g, 6.27 µg/g, and 7.41 µg/g. Significant differences (p < 0.05) were detected in the Cu and Zn content in G. erosa, as well as Zn in C. obtusa, between stations. Pb and Cu were generally higher in both species at Station 2, while the highest Zn levels were found in G. erosa at Station 1 (9.12 µg/g) and C. obtusa at Station 2 (8.50 µg/g). The highest PTWI value was found in G. erosa at Station 1; however, all results remained within safe consumption limits. Therefore, both species are deemed safe for consumption, despite variations in heavy metal content between species and research locations
Heavy Metal Concentrations in Avicennia alba from the Western Coast of Dumai City, Riau Province Yona, Fitria Mai; Amin, Bintal; Efriyeldi, Efriyeldi
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.132-138

Abstract

Coastal ecosystems play a crucial role in supporting biodiversity, but are increasingly threatened by heavy metal pollution from industrial and domestic activities. The mangrove species Avicennia alba can absorb heavy metals through phytoremediation processes, making it a promising bioindicator of environmental contamination. This study aimed to analyze the concentrations and variations in the accumulation of lead (Pb) and copper (Cu) in A. alba roots, stems, and leaves along the western coast of Dumai City, Riau Province. Fieldwork was conducted from January to February 2025 at two sampling sites: Pangkalan Sesai Village (Station 1) and Purnama Village (Station 2). Heavy metal concentrations were determined using Atomic Absorption Spectrophotometry (AAS) following wet digestion. Environmental parameters were also measured, including temperature, salinity, and pH. Data analysis involved descriptive statistics, non-parametric tests, and independent t-tests. The results indicated that Pb and Cu were present in all plant parts. The highest concentration of Pb was found in the stems (7.05 µg/g), while Cu was most concentrated in the roots (5.38 µg/g). No statistically significant differences were observed among plant parts (p > 0.05); however, a significant spatial difference in Pb concentrations between the two stations was detected (p < 0.05). These findings suggest that anthropogenic activities and local water quality conditions likely Influence the observed variations. Overall, A. alba demonstrates strong potential as a bioindicator species for monitoring heavy metal contamination in coastal environments.
Uji Kemampuan Bacillus spp. dalam Menghambat Ganoderma boninense Pat. Penyebab Penyakit Busuk Pangkal Batang Kelapa Sawit Secara in Vitro Elfina, Yetti; Sukendi, Sukendi; Efriyeldi, Efriyeldi; Sutikno, Agus
Agro Bali : Agricultural Journal Vol 7, No 2 (2024)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37637/ab.v7i2.1816

Abstract

Penyakit busuk batang akar (BPB) merupakan salah satu penyakit yang menyebabkan menurunnya efisiensi kelapa sawit. BPB disebabkan oleh Ganoderma boninense Pat. Alternatif pengendalian penyakit ini yang dapat dilakukan adalah dengan pengendalian hayati menggunakan Bacillus spp, karena bersifat ramah lingkungan.. Tujuan penelitian untuk menguji kemampuan Bacillus spp.  yang dapat menghambat G. boninense dan menentukan kap Bacillus spp. dalam mempengaruhi morfologi G. boninense penyebab BPB pada kelapa sawit secara in vitro. Penelitian dilakukan secara eksperimen dan terdiri dari 7 perlakuan dan 4 ulangan. Perlakuan yang digunakan, yaitu: tanpa Bacillus spp., Bacillus amyloliquefaciens, Bacillus cereus, Bacillus pseudomycoides, Bacillus velezensis 1, Bacillus velezensis 2, Bacillus velezensis 3. Data  hasil pengamatan dianalisis dengan Analysis of Varians (ANOVA dan dilanjutkan dengan uji lanjut Duncan New Multiple Range Test (DMRT) pada taraf 5% menggunakan program SPSS versi 25. Data hasil pengamatan yang diperoleh dilanjutkan dengan uji jarak berganda duncan (DMRT) pada taraf 5%. Hasil penelitian menunjukkan bahwa Bacillus spp. yaitu B. amyloliquefaciens, B. cereus,  B. pseudomycoides, B. velezensis 1, B. velezensis 2 dan B. velezensis 3 mampu menghambat G. boninense namun 3 Bacillus spp. yaitu B. cereus, B. pseudomycoides dan B. amyloliquefaciens tidak mampu menghasilkan zona hambat. B. velezensis 2 lebih baik dalam menghambat G. boninense dengan daya hambat 78,05%, zona hambat 58,8%, daya hambat filtrat 92,49%. Bacillus spp. mampu mempengaruhi karakteristik makroskopis dan mikroskopis G. boninense, dapat menyebabkan G. boninense tidak mampu menghasilkan konidia serta dapat menghambat perkecambahan spora G.boninense. 
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 Bahruddin Batubara, Ummi Mardhiah Bintal Amin Bona Juandi Bonawi Sihombing Bonita Tiolina Exaudi Budijono, Budijono Burhan Marbun Cahyo, Bintang Dwi Clara Yolandika 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 &#039; Khairunnisa Khairunnisa Khawarizmi, Dannes M. Kholida, Azzahra Kristoper Aritonang Laila Langsana Laksono Trisnantoro Langsana, Laila Laoli, Elfind Lee, Seung Hun Lianov, Dea Lie Othman Lieng, Lieng Lubis, Abdillah Lucky Syarif Lulu Mayna Nabilla 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 Pradini, Ulfa Rizki 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 Rahayunigtyas, Putri 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, Rafly Fadiansyah 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 . Suwondo Suwondo Suzila &#039; 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 &#039; Zulkifli Zulkifli Zulkifli Zulkifli