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Sofyan Husein Siregar
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Energy Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Social Sciences Other

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PENGELOLAAN EKOWISATA MANGROVE DESA MENGKAPAN, KECAMATAN SUNGAI APIT, KABUPATEN SIAK Siregar, Sofyan Husein; Zulkifli, Zulkifli
Journal of Rural and Urban Community Empowerment Vol. 3 No. 1 (2021): Oktober
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

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

Abstract

Salah satu kegiatan pemamfaatan ekosistim manggrove berbasis konservasi adalah kegiatan Ekowisata Mangrove. Desa pesisir Mengkapan salah satu wilayah masih memiliki mangrove yang masih baik dan terdapat kawasan ekowisata yang di kelola secara swadaya oleh masyarakat sejak tahun 2016 namun belum berjalan secara optimal disebabkan pemahaman dan kemampuan masyarakat dalam Pengelolaan Ekowisata Mangrove Desa Mengkapan, Sungai Apit, Kabupaten Siak masih sangat minim. Tujuan dari penyuluhan ini adalah untuk meningkatkan pemahaman dan pengetahuan masyarakat tentang pengelolaan ekowisata mangrove yang komprehenship dengan memperhatikan kelestarian dan peningkatan ekonomi bagi masyarakat lokal. Metode yang digunakan dalam kegiatan penyuluhan ini adalah metode ceramah, diskusi dan kunjungan langsung ke lokasi kawasan ekowisata mangrove mengkapan yang dikelola oleh masyarakat. Hasil evaluasi terhadap 25 orang peserta penyuluhan menunjukkan bahwa 90% peserta belum paham tentang pengeloaan ekowisata mangrove dan 10% faham sebatas kegiatannya saja. Setelah mengikuti kegiatan penyuluhan ini terjadi peningkatan 70% pengetahuan tentang bagaimana cara mengelola ekowisata mangrove hal ini terlihat dari Tanya jawab yang dilakukan oleh pemateri. Berdasarkan kunjungan ke kawasan mangrove dan saran dari peserta perlu adanya peningkatan sarana prasarana pendukung kegiatan ekowisata dan pendampingan masyarakat untuk dapat sebagai pemandu ekowisata mangrove.
Effect of Urea with Various Doses on Skeletonema costatum Cell Growth Rosa, Mila; Siregar, Sofyan Husein; Nurrachmi, Irvina
Jurnal Perikanan dan Kelautan Vol. 26 No. 3 (2021): October
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

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

Abstract

This research was conducted in March 2020 at BPBALP Teluk Buo, West Sumatera. This research aimed to determine the best dose for urea usage on S. costatum cell growth. The method used in this research was an experimental method using Completely Randomized Design (CRD) with one factor, which was the various doses of urea fertilizer consisting of five treatments with three replications. Urea various doses used were 0 ppm (control treatment), 40 ppm (treatment A), 60 ppm (treatment B), 80 ppm (treatment C), and 100 ppm (treatment D) totaling 15 treatment units. The tested organism in this research was S. costatum. The container used was a plastic jar with 2 liters capacity. The parameters tested in this research were the maximum cell population density achieved by seven days of maintenance, absolute growth rate, relative growth rate, and specific growth rate. The results showed that the best cell density was found at the treatment D (100 ppm), which was 1,228 x 104 cells / mL and the lowest cell density was in the control treatment (without urea) which was 533 x 104 cells / ml. The results of water quality measurements during the study were still in an adequate range and met the maintenance requirements of S. costatum. The range of water quality parameters were salinity 26-28 ppt, temperature of 25-27oC, and pH of 8.
Analisis of Total Oil Content and Planktonic Diatom (Bacillariophyceae) in the Waters of Lalang Strait, Mengkapan Village Siak Regency Sinaga, Octavia Lorensa Br; Siregar, Sofyan Husein; Nedi, Syahril
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

Oil pollution in the waters is one of the factors that affect the abundance of fhytoplankton, especially the diatom. The waters of Lalang Strait, Mengkapan Village, are used as international shipping lanes and industrial areas. This study aims to analyze the total oil content, calculate the abundance of planktonic diatoms, and explain the relationship between the total oil content and the abundance of planktonic diatoms carried out in the Lalang Strait waters, Mengkapan Village, Siak Regency, Riau Province. This research uses survey method. Station 1 is near Tanjung Buton Port, station 2 is in the mangrove ecotourism area, and station 3 is in the fishing port and near the settlement. The result of oil content analysis obtained an average value of 0,00016 ppm. The highest oil content at station 3 is 0,00035 ppm and the lowest at station 2 is 0,00011 ppm. The results of the calculation of the abundance of planktonic diatoms ranged from 5.014 to 22.062 cells/L. The highest abundance at station 1 was 17.716 cells/L. The lowest abundance was at station 2 which was 9.694 cells/L. Simple linear regression test result, obtained equation Y= 14,2644+(-3802,27x). The coefficient of determination (R2)= 0,002 states 0,2 % of the abundance of planktonic diatoms is influenced by oil content and the rest is influenced by other environmental factors. Correlation coefficient (r) = 0,053, so the relationship of total oil content with the abundance of planktonic diatoms is very weak.
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.
Community Structure of the Epipelic Diatom Vertically in the Intertidal Zone, West Dumai City, Riau Province Dellarosa, Wiranda; Siregar, Sofyan Husein; Nurrachmi, Irvina
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 community structure of epipelic diatoms vertically between stations. This research was carried out in March 2022 which is located in the waters of the City of West Dumai. The method used is the survey method. Determination of the sampling point is done by purposive sampling method and the determination of the station is based on anthropogenic input. A sampling of epipelic diatoms was carried out using a modified corer, then brought to the laboratory to identify and calculate the community structure, and the sediment samples were calculated for the content of nitrate, phosphate, organic matter, and sediment fractions. Sampling is accompanied by measurements of water quality consisting of brightness, temperature, current velocity, salinity and pH. 21 genera of epipelic diatoms were found in the waters of West Dumai City with an abundance value of 9,784 – 32,739 ind/cm2. The average value of the diversity index obtained was 2.6460 – 3.2065, the dominance index was 0.1478 – 0.2423, and the uniformity index was 0.7952 – 0.8424. The results of the one-way ANOVA test obtained an average value of 0.001, meaning that there was a significant difference in the abundance of epipelic diatoms between stations.
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.
Comparison of the Abundance of Macrozoobenthos in Areas Affected and Unaffected by Reclamation in Pesisir Selatan District Mufidah, Marhamah Nurul; Siregar, Sofyan Husein; Tanjung, Afrizal
Tropical Marine Environmental Sciences Vol. 3 No. 2 (2025): 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/tromes.3.2.59-66

Abstract

This study aims to identify differences in macrozoobenthos abundance in areas affected and unaffected by reclamation around the Mandeh Tourism Area. This study was conducted in February–March 2023, using a survey method and sampling with the transect method. This study's results indicate that the water's condition in the Mandeh Tourism Area is still within the limits of the water quality standards and is quite good for the survival of macrozoobenthos. Macrozoobenthos found in Mandeh Tourism Area consisted of 12 families, namely Arcidae, Asterinidae, Cardiidae, Ellobiidae, Nassariidae, Neritidae, Potamididae, Siphonariidae, Trochidae, Turbinidae, Vanikoridae and Veneridae. A mixture of sand and gravel dominates the sediment type in the Mandeh Tourism Area. The total organic matter content of the sediments ranged from 3.65 to 3.90% (low). The density value of macrozoobenthos individuals in areas affected by reclamation is 5.89 ind/m2 with the highest relative density, Terebralia sulcata (26%), in areas unaffected by reclamation the average density of individuals is estimated at 10, 57 ind/m2 with abundance the highest relative is the type Pythia scarabaeus (23%).
Phytoplankton Community Structure in Carocok Tarusan Beach Pesisir Selatan Regency West Sumatra Province Adrizal, Taufik; Siregar, Sofyan Husein; Nurrachmi, Irvina
Journal of Coastal and Ocean Sciences Vol. 3 No. 2 (2022): 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

The existence of phytoplankton in the aquatic environment greatly affects aquatic life itsself. Through photosynthesis, phytoplankton is responsible for producing oxygen and nutrients, especially for other marine organisms. Furthermore, phytoplankton can be indicators of fertility and the quality of an aquatic ecosystem. The waters of Carocok Tarusan beach have congested anthropogenic activities, like shipyard and shipping, tourism, and domestic activities. This of course greatly affects the existence of phytoplankton which is very dependent on environmental conditions. This study aims to determine the structure of the phytoplankton community and its relation to the characteristics along with the quality of the waters in Carocok Tarusan beach. Phytoplankton samples were collected by using plankton net number 25 at three stations that have been determined by the purposive sampling method. The results showed that the temperature values ranged from 29.3-29.7ºC, salinity 27.7-31.3‰, brightness 1.8-3 m, pH 7, 0.3-0.6 m/s. There are 12 species from 3 classes found. The most common species found were Navicula sp, Synedra ulna sp., and Isthmia sp. The average abundance of phytoplankton at each station is 57.86-92.58 Ind/L. The results of the ANOVA test on the abundance of phytoplankton showed a significant value of 0.108, which means the P value> 0.05, this indicates that there is no significant difference in the abundance of phytoplankton between stations. The value of the species diversity index (H') of phytoplankton has an average value of 1.7436 - 2.0028. The Uniformity Index (E) has an average value ranging from 0.1393 to 0.1464. Meanwhile, the phytoplankton dominance index shows an average value of 0.2661 – 0.3191.
Abundance of Phytoplankton and Primary Productivity Levels in the Waters of Kasiak Island West Sumatera Province Silaban, Santi Maria; Thamrin, Thamrin; Siregar, Sofyan Husein
Journal of Coastal and Ocean Sciences Vol. 3 No. 2 (2022): 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

This study was conducted in June 2021. Data collection of phytoplankton abundance and primary productivity was carried out in the waters of Kasiak Island of West Sumatra Province. The aim of the study was to analyze phytoplankton abundance, primary productivity vertically, and the effect of phytoplankton abundance on primary productivity in the waters of Kasiak Island. Based on the results of this study obtained that the abundance of phytoplankton on the surface (0 m) ranges from 41.67-187.50 ind/L. The abundance of phytoplankton in the depth of 5 ranges from 20.83-104.17 ind/L. While the primary productivity level of the results of the measurement of dissolved oxygen of the surface (0 meters) is obtained ranging from 7.6-11.2 mg/L while at a depth (5 m) range from 8-10.4 mg/L. Based on simple linear regression analysis on the surface (0) obtained the equation Y = 42.26x + 0.48x. The value of r2 = 0.2031 while the correlation coefficient value (r) is 0.4507. Based on the results of a simple linear regression analysis it is stated that the increasing abundance of phytoplankton the primary productivity level of the waters increases. As for the depth of 5 meters the equation Y = 46.45x + 0.07x. The value of r2 = 0.0183 while the correlation coefficient value (r) is 0.1335. Based on linear regression obtained a negative correlation means that reducing the abundance of phytoplankton will reduce the productivity of the waters.
Condition of Coral Reef Cover and Overview of Coral Fish in Pagang Island, South Coast, West Sumatera Sirait, Juliper Parasian; Siregar, Sofyan Husein; Nedi, Syahril
Journal of Coastal and Ocean Sciences Vol. 3 No. 1 (2022): January
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

This research was conducted in October 2020 in the waters of Pagang Island, Koto XI Tarusan District, South Coast Regency, West Sumatera Province. This study aims to determine the condition of coral reefs and reef fish in coral reef ecosystems which were analyzed based on the coral cover in Pagang Island. The method used in this research is UPT (Underwater Photo Transect) for assessing the live coral coverage and the UVC (Underwater Visual Census) for collecting the reef fishes data. The result shows that the condition of coral reef cover in Pagang Island at all stations is in critical condition. However, the high percentage of coral dying at all stations presumed that these coral reefs were in good condition. Percentage of coral cover in the station I 4.13%, station II 6.2%, station III 1.2%, and station IV 2.07%. A total of 31 fish species belonging to 7 families with a total of 328 individuals were identified in all stations. The average abundance of fish at all stations is 0.328 ind/m2.
Co-Authors ', Thamrin ', Zulkifli AA Sudharmawan, AA Achmad Mulyadi Adam Dionfriski Ade Riccard Simatupang Adriana, Alysa Adrizal, Taufik Afrizal Tanjung Albahri Albahri Alvin Natali Andi Darlianto Anisaldi Anisaldi Anita, Sofia Antoni Antoni Aras Mulyadi Ardhi Yusuf Ardian Dwi Pratama Ardiansyah Hamid Arief Mubyarso Aslim Rasyad Asmika Harnalin Simarmata Bahri S, Aswan Bahtiar Denny Edison Belilasari Belilasari Belilasari, Belilasari Beranda, Ongki Okto Bintal Amin Bornok Silalahi Chairun Nisa Chitra Hermawan Chitra Hermawan Dalimunthe, Salmi Patima Dellarosa, Wiranda Deni Efizon Desmarina, Y. Despela, Despela Dessy Yoswati Dessy Yoswaty Devid Joehari Dewi Marni Dinda Trie K Hayati Dinda Trie K Hayati Dionfriski, Adam Dodik Ridho Nurrochmat Dudi Candra Eddy Handoko Edmond Edwar Efriyeldi, Efriyeldi Elda Nazriati Elizal, Elizal Endah Julita Eva Desy Yulina Siregar, Eva Desy Yulina Fainal Asandi Fairuzia, Putri Marwah Farid Febrianda Fathiya Hanifa Fauzan, M. Febbyolla, Selfi Anidal Febrianda, Farid Fery, Rony andes Gendraya Rohaini Ginting, T.B. Hamid, Ardiansyah Hanif, Naufal Happy Rosalina Hapsoh Hapsoh Hapzi Ali Henny Daniaty I Gusti Wayan Murjana Yasa Imam Suprayogi Ira Putra, Ira Irvina Nurachmi Jamhari Jamhari Jasril Jasril Joenathan Sarumpaet Joko Samiaji Josua Simanjuntak, Josua Lazuardi, Andika Lucky Rahman Lydia S Marpaung M. Hambali M. Hambali Manda Putra, Ridwan Marpauang, EkoRinaldi Masykur HZ Masykur Hz Megawati Hari Dwi Jayanti Mery Mery Mia Audina Mia Audina, Mia Miduk Tampubolon Mila Rosa Miswadi Miswadi Mubarak Mubarak Mubarak Mubarak Muchlis Muchlis Muchlis Muchlis Mudinillah, Adam Mufidah, Marhamah Nurul Muhammad Saroha Lubis Muhammad, Andi Syahroni Mumin Rifai Musrifin Galib Nickson Panjaitan Nila Sari Lubis Nizar Rofiki Nova Esterlita Novi Permata Sari Noviawati Riza Nugraha, Rafiq Prima Nur Arifin Nur Arifin, Nur Nurhapida Nurhapida Nurliya ' Octavia Lorensa Br Sinaga Prasiska, Yulia Puspita, Sarah Putri Wahyuni Rahmita, R. Ramadhan, A.R Rasoel Hamidy Renata, Vivien Ridwan Manda Putra Rifardi Rinaldo, Rinaldo Rinaldo, Rinaldo Rini, Yulia Sapta Riski Hambali Risqiana Dani Riza Yuliani Rizka Aprisanti Rizka Aprisanti Rizki, A. Rosa, Mila Rulen, Betty Nia Rusadi, M Dio Eigmar S.Pd. M Kes I Ketut Sudiana . Said Nazman Arif Samsir Samsir Sari, D.J. Selfi Anidal Febbyolla Selvia, Seli Shofian Nanda Adiprayoga Silaban, Santi Maria Sinaga, Octavia Lorensa Br Sirait, Juliper Parasian Sitindoan, Benni Mario K. Sofia Anita Sujianto Sujianto Sujianto Sukendi Sukendi Susiyanti. N Sutami Sutami Sutrisna Sutrisna suwondo suwondo Syafruddin Nasution Syafrudin Nasution Syahril Nedi Taufik Herman Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Thamrin Trinop Sagiarti TRINOP SAGIARTI, TRINOP Trisla Warningsih Vivien Renata Wahyudi Wahyudi Wahyuni, Weni Indah Windarti Windarti Wiranda Dellarosa Yanasari, Nurry Yanti, D.H. Yosua Afrianus P Yudha Januarizki Setiawan Yulia Prasiska Yuliani, Riza Yusni Ikhwan Siregar Zahtamal Zahtamal Zientika, Zientika Zukarnaini Zukarnaini Zulfan Saam Zulkifli ' Zulkifli Zulkifli