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All Journal Jurnal Natur Indonesia Jurnal Perikanan dan Kelautan Berkala Perikanan Terubuk Jurnal Ilmu Lingkungan Jurnal Kajian Lingkungan Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Aquasains : Jurnal Ilmu Perikanan dan Sumberdaya Perairan Asian Journal of Aquatic Sciences Jurnal Zona Journal of Coastal and Ocean Sciences Journal of Rural and Urban Community Empowerment Dinamika Lingkungan Indonesia Bhakti Nagori (Jurnal Pengabdian kepada Masyarakat) EcoNews Jurnal Perikanan dan Kelautan Tropical Marine Environmental Sciences Jurnal Natur Indonesia
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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STUDY ON ECOLOGY OF RED EYE SNAIL (Cerithidea obtusa) AT JANGKANG RIVER ESTUARY ECOSYSTEM OF SELAT BARU VILLAGE DISTRICT OF BENGKALIS RIAU PROVINCE Nurliya '; Syafruddin Nasution; Sofyan Husein Siregar
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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The study was conducted in April-May 2016. Samples were taken in the mangrove forest in the village of New Straits Bengkalis. The aim of this study was to determine the ecological parameter of red eye snail (C. obtusa), which include population density, size distribution of the individuals, as well as the relationship between the organic content of the sediment and density of snail. The method used in this research was survey method. Research station consists of two stations, which ware determined purposively. There were three zones each station, and each zone consist of three plots. Each plot divided in to 9 sub-plots measuring 1x1m2. Results showed that the average density of red eye snail in the station I was higher (39.22 ind / m2) than the density on stations II (21.66 ind / m2). However, statistical analysis (T test) was known that density between two stations were not significantly different. The dominant size group of C. obtusa in the area was the forth class (2,89-3,33 cm), while the less dominan was the first class (< 1,6 cm). Linier regression analysis showed that there was a medium value of relationship between sediment organic matter versus the density of C. obtusa r = 0.423.Keywords : Density, Cerithidea obtusa, Organic sediment, Jangkang Estuary.
TYPE AND ABUNDANCE OF PLANKTONIC DIATOMS IN RANGSANG BARAT WATERSDISTRICT MERANTI ISLAND RIAU PROVINCE Mery Mery; Joko Samiaji; Sofyan Husein Siregar
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract Planktonic diatoms are plant-based microorganisms that live floating in the  water column, relatively lacking in motion and their presence is influenced by water quality and able to photosynthesize. This research was carried out in May 2018 in the waters of Rangsang Barat Meranti Islands Regency, Riau Province. This study aims to find out the type and abundance of planktonic diatomsin the waters of Rangsang Barat.The method used in this study was the survey method. Planktonic diatom sampling was using plankton net No. 25. The results of this study showed that the type and abundance of planktonic diatoms in Rangsang Barat waters at each station was different. The type most often type found at each station was the species Coscinodiscus sp.and Thalassiosira sp.The most rarely found species wereThalassionema sp. and Synedra sp. The highest abundance of planktonic diatoms was found at station II, in which reaches at 261.57 ind / l while the lowest was at station III with the value 48.61 ind / l. Based on the results of thetest One-Way, the  Anovaabundance of planktonic diatoms showed a significance value of> 0.05 i. e. 0.016, indicating the abundance of planktonic diatoms was significantly different. Keywords: Diatoms, Type, Abundance, Rangsang Barat Waters
DISTRIBUSI DIATOM EPIFITIK SECARA VERTIKAL PADA BATANG Avicennia sp DI KAWASAN MUARA SEI UNDAN KABUPATEN INDRAGIRI HILIR Susiyanti. N; Sofyan Husein Siregar; Irvina Nurrachmi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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This research was conducted from April-Mei 2013 in the Waters around the Estuary Sei Undan, Kabupaten Indragiri Hilir, Riau Province. The aim of this research is to understand the distribution and abundance of epiphytic diatom presenting on the trunk of the Avicennia sp which is related to water quality factor. Survey method was applied on this research where data were obtained by direct observation in the field. The samples of epiphytic diatom were analyzed in the Laboratory of Marine Biology. Water quality parameters were measured in situ.Six species of epiphytic diatom were found on the trunk. The abundance of epiphytic diatom on the trunk ranged from 0 to 9.59 ind/cm2. Beside that, water quality parameters were in the sufficient range for marine epiphytic diatom.Keywords: epiphytic, diatom, avicennia sp, Sei Undan
ABUNDANCE OF POISONOUS BENTHIC DINOFLAGELLATE IN SEAWEED (Sargassum Sp) IN THE COASTAL WATERS OF NIRWANA WEST SUMATRA PROVINCE Nickson Panjaitan; Irvina Nurrachmi; Sofyan Husein Siregar
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTThe study was held  in  January to February 2019. The purpose of this study was to determine the abundance of toxic benthic dinoflagellates on seaweed Sargassum sp. each station and to see the relationship of abundance of toxic benthic dinoflagellates with the quality of the waters in the seaweed ecosystem of Sargassum sp. in the waters of Nirwana Beach, West Sumatra Province. The method used in this study is a survey method. The results showed the highest genus abundance at the three research stations was the genus Prorocentrum with an average abundance value of 216.05 cells / g and the lowest genus abundance at the three research stations was the Gambierdiscus genus with an average abundance of 78.80 cells / g. Obtained simple linear regression test results show the concentration of nitrate and phosphate concentration is directly proportional to the abundance of dinoflagellates. The relationship between abundance of benthic dinoflagellate abundance with moderate relationship nitrate concentration and the relationship between abundance of benthic dinoflagellate abundance with strong relationship phosphate concentration.Keywords: Dinoflagellata, Benthic, Poisonous, Sargassum sp.
THE STRUCTURE COMMUNITY OF PLANKTONIC DIATOM WITH NITRATE AND PHOSPHATE CONCENTRATIONS IN SEI UNDAN ESTUARINE SUB DISTRICT OF RETEH DISTRICT OF INDRAGIRI HILIR Lydia S Marpaung; Sofyan Husein Siregar; Aras Mulyadi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Research on the structure community of planktonic diatom with nitrate andphosphate concentrations in sei undan estuarine sub district of Reteh district ofIndragiri Hilir was conducted on May 2013. The aims of this study was todetermine the community structure of planktonic diatom which includes index ofdiversity, index of dominan and index of uniformity and was to determine therelationship between the nitrate and phosphate consentration with the abundanceof diatom. Sample were taken at 4 station each station was divided into 3sampling points. The identification result of sampel obtained 7 species of centricdiatoms anda 1 species of pennate diatom. The highest abundance of diatom wasfound in station 2 (7.846,95 ind/L) and the lowest was found in station 4 (2.615,65ind/L). The highest individual abundance was shown by Nitzschia pungens andLeptocylindrus minimus. It was indicated that dominan species in the waters.Based on index of diversity, index of dominan and index of unifornity the areawas categorized as mesotrofic area.Keyword: Sei Undan Estuarine, Diatom, Structure Community, Nitrate & Phosphate
COMMUNITY STRUCTURES OF EPIPELIC DIATOM AS A BIOINDICATOR IN CAWAN ISLAND OF INDRAGIRI RIVER’S ESTUARY OF INDRAGIRI HILIR REGENCY, RIAU PROVINCE Shofian Nanda Adiprayoga; Sofyan Husein Siregar; Joko Samiaji
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

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The study on diatom epipelic has been conducted in Cawan Island coastal waters of Indragiri River’s estuary, Riau Province. The main purpose of this research was to learn the community structures of epipelic diatom and water quality conditions. The method used were consisting of field survey and data gathering from related parties. The epipelic diatom samples were collected by using 5x5 cm2  plots. Diatom samples and water quality analysis were done in Marine Biology Laboratory of Faculty of Fishery and Marine Science. The results showed that community structures of epipelic diatom had intermediate level of contaminant. The 2 indexes, i.e.the diversity index (H’) and the eveness index (E’), were calculated at the values of  2.768 and  0.499, respectively. As for the dominant index (D) the value was at 0.176. Most of the parameters value of water quality (chemical and physics) were in the range of the aquatic organisms life. Statistical analysis showed the abundance of epipelic diatom between station were relatively similar. Keywords: Diatom Epipelic, Estuary, Coast, Cawan Island
EFFECT OF SUBSTRATE TO DENSITY AND MORPHOMETRIC SEAGRASS LEAF (Thalassia hemprichii) IN NIRWANA SEA WATERS OF PADANG WEST SUMATERA Nova Esterlita; Sofyan Husein Siregar; Zulkifli Zulkifli
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract This research has been held on March-April 2018 in Nirwana sea waters of Padang. The purpose of this study was to determine the density of species, morphometrics of Thallassia hemprichii leaves. The study was also aimed to analyze the influence of substrate type on density and morphometrics of seagrass leaves. The stations were determined by purposive sampling and use transect line method for taken sample. The results of this study showed the highest density was found in Station I that has the type of substrate is coral fraction with value about 302.56 stands / m2 and thelowest density was found in Station III that has sand substrate with value 45.78 stands / m2. The longest morphometric length of the longest seagrass leaves in Station I is about 18.36 cm and the shortest at Station III with the value 7.96 cm. The morphometric average width of  the widest seagrass leaves  is at Station I with the value 1.2 cm and the shortest in Station III with value 0.62 cm. The result of simple linear regression test for the influence of the substrate on seagrass density and morphometric leaf with R2 value (coefficient of determination) = 0.21; 0.33; 0.16 indicates that the type of substrate affects the density and morphometrics seagrass T. hemprichii leaves. Keywords: Substrate, Seagrass , Density, Morphometric
MARINE ECOTOURISM DEVELOPMENT STRATEGY AT THE COASTOF THE LAGUNA SAMUDRA, KAUR REGENCY, BENGKULU PROVINCE Lucky Rahman; Dessy Yoswaty; Sofyan Husein Siregar
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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 ABSTRACT             This research was conducted in June-August 2019 at the coast of the Laguna Samudra, Kaur Regency, Bengkulu Province. The research aim to find out the potential of marine ecotourism and the development strategy at the coast of Laguna Samudra.This research uses a survey method.Resultsshown thatthe coast of Laguna Samudrahas suitable potential to be developed as a marine ecotourism area. The results of calculations on the value of land suitability index for recreational marine tourism category are 85.2%. Indicates that their value wasthe coastal of Laguna Samudra is very suitable to be uses a marine ecotourism destination. The SWOT analysis shows us a several alternative management strategies that are appropriate for the development of marine ecotourism on the coast of Laguna Samudra. The strategies uses include the Strategy Strength-Opportunity, namely make a general management plan (General Management Plan), improvement of local community development on ecotourism. Weakness-Opportunity Strategy, namely increased promotion in various social media,improve coordination between policy makers and managers, and improve the quality of human resources (HR). Keyword: Potential, Marine Ecotourism, SWOT analysis, Laguna Samudra Beach
THE COMMUNITY STRUCTURE OF EPILITIC DIATOM IN BUO BAY WATERS PADANG, WEST SUMATERA Farid Febrianda; Thamrin Thamrin; Sofyan Husein Siregar
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTEpilithicdiatom are one of the diatom that can withstand waves and currents, attached to hard substrates or rocks. This research was conducted from March 2018 - April 2018 located in Buo Bay Area, Padang,West Sumatra. Thegoal of this research are to determine the water quality and the structure community of epilithic diatom in Buo Bay Area, Padang, West Sumatra. The survey method was appllied in this research, sampling location were set up purposively which divided into 3 stations. Water quality measurements are carried in each station which consists of physical parameters specifically temperature, current velocity, brightness and chemical parameters consists of salinity, dissolved oxygen, acidity. Based on water quality measurement at buo baycan support the growth of epilithic diatom organism. The result showed that there were 15 genus of epilithic diatom in buo bay padang. The highest average abundance of epilithic diatoms is in station 2 was 3340.22 individual/cm2 and lowest section  is in station 3 with the average of abundance value was 2741.97 individual/cm2. Key Word: Water Quality, Community Structure, Abundance, Epilitic Diatom 
CONTAMINATION AND CHARACTERISTICS OF VISUAL SOLID WASTE IN COASTAL AMPALU DISTRICT NORTH PARIAMAN PARIAMAN CITY WEST SUMATRA Devid Joehari; Sofyan Husein Siregar; Yusni Ikhwan Siregar
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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This research was conducted in Agust 2015 at coastal Ampalu district NorthPariaman Pariaman City West Sumatra Province. T he purpose of this study was todetermine the level of contamination and the characteristics of solid waste. Thesurvey methode was applied in this research whicht are 2 station observation alongthe coast Ampalu then be calculated and weighed according to characteristic solidwaste.The results of research shaun that the solid waste in coastal Ampalu wascategorised in to lees contaminated (category B) and fairly contaminated (categoryC). Where the at station 1 lees contaminated, and then Station 2 is relative fairlycontaminated of visually, that generally solid waste consisted of plastics, paper,rubber, foam, jute sacks, leaves, and small pieces of wood. All Solid wasteindetyfield originated from land base waste.Key words : Contamination, characteristics, solid waste, coastal Ampalu
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 &#039; 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 &#039; Zulkifli Zulkifli