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Elizal, Elizal
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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CORAL REEF DISTRIBUTION MAPPING CASE STUDY OF SETAN ISLAND WATERS, WEST SUMATRA Pambudi, Bagas Ariya; Thamrin, Thamrin; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol 7 No 2 (2024): August
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.7.2.318-328

Abstract

The research was conducted in May 2023 in Setan Island, West Sumatra. The study aimed to map the distribution of coral reefs, test the accuracy of the resulting map, and determine the condition of coral reef cover on Setan Island. The methods used are remote sensing methods using Sentinel-2 satellite imagery and field survey methods to validate the distribution of coral reefs resulting from image data processing (Groundcheck) and to observe the condition of coral reefs using the Underwater Photo Transect (UPT) method. Determination of sampling locations to ground check the distribution of coral reefs using a Stratified random sampling method while determining sampling locations for observations of coral reef cover using a purposive sampling method. The study results obtained a coral reef distribution map with a reef distribution area of 13.18 ha or 47.55% of the total shallow water area. The accuracy test found an accuracy value of 80% with a kappa coefficient 0.7, where the category is good and the level of trust is moderate. The condition of coral reef cover based on live corals in the waters of Setan Island is in the Fair and Poor categories. Percentages range from 0.33% to 31.36%. The dominating lifeform types are coral massive and coral submassive
Water Brightness Profile Based on Tidal Current in Dumai River Estuary, Dumai City, Riau Province Aristi, Fiona; Rifardi, Rifardi; Elizal, Elizal
Journal of Coastal and Ocean Sciences Vol. 2 No. 3 (2021): 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/

Abstract

This research was conducted in August 2020 in the Dumai River Estuary, West Dumai District, Dumai City, Riau Province. The purpose of this study was to determine the brightness of the waters and its distribution in the waters of the Dumai River estuary. The research method used is a survey method with the determination of the sampling point using purposive sampling method at tide towards low tide and low tide towards the tide. The map is heavy using ArcMap 10.4 software and interpolated using IDW (Spatial Analyst) tools. The results showed the brightness at tide to low tide, which is around 23.5-129 cm with an average brightness of 84.3 cm. Brightness at at low tide to high tide is around 35-127.5 cm with an average brightness of 88.15 cm. Based on the map, the brightness of the waters of the Dumai River Estuary is low at the mouth of the estuary and high in the part that leads to the sea
The Relationship of Nitrate, Phosphate, and Silicate Concentrations to The Abundance of Planctonic Diatoms in Carocok Tarusan Waters, Pesisir Selatan District Yandra, Yoli; Nedi, Syahril; Elizal, Elizal
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 carried out from December 2020 to January 2021 in Carocok Tarusan Waters, Pesisir Selatan Regency, West Sumatra, which aims to analyze the concentration of nitrate, phosphate and silicate, calculate the abundance of planktonic diatoms and analyze the relationship between the content of nitrate, phosphate and silicate to the abundance of planktonic diatoms present. in the waters of Carocok Tarusan, Pesisir Selatan Regency. The research method used in this study is a survey method while the determination of research stations is carried out by purposive sampling. The results showed that the average nitrate concentration was 0.7792– 0.8757 mg/L, the average phosphate concentration was 1.7220– 2.0833 mg/L and the silicate concentration was 0.6287 - 0.6835 mg/L. Planktonic diatoms found in Carocok Tarusan waters contained 13 species from 3 classes, namely Bacillariophyceae, Chaetoceraceae and Coscinodiscophyceae. The results of the calculation of the abundance of planktonic diatoms are 17.82 – 20.72 Ind/L. The test conducted to determine the relationship of nitrate, phosphate and silicate to the abundance of planktonic diatoms was a simple linear regression test. Based on the results of the linear regression test, it is known that the effect of nitrate concentration on the abundance of planktonic diatoms in Carocok Tarusan waters is 00.81%, while the remaining 99.19% is influenced by other factors, for the effect of phosphate concentration on the abundance of planktonic diatoms in Carocok waters. Tarusan is 8.81%, while the remaining 91.19% is influenced by other factors and for the effect of silicate concentration on the abundance of planktonic diatoms in Carocok Tarusan waters as much as 2.97%, while the remaining 97.03% is influenced by other factors
Analysis of Physical Hydro-Oceanographic Factors for Abrasion at Pasir Jambak Beach, Padang City, West Sumatra Province Athhary, Dhiva Danaya; Rifardi, Rifardi; Elizal, Elizal
Journal of Coastal and Ocean Sciences Vol. 4 No. 3 (2023): 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/

Abstract

Abrasion is a common problem in coastal areas. This is due to natural factors that influence the phenomenon of abrasion in a coastal area, including the hydro-oceanographic processes that take place in the sea. Pasir Jambak Beach is one of the beaches in Padang City that is experiencing worrying abrasion. Therefore, it is necessary to research the analysis of physical hydro-oceanographic factors for beach abrasion. This survey was conducted in February - April 2023 at Pasir Jambak Beach. This study aimed to determine the degree of abrasion and its relationship to the hydro-oceanographic physics of the beach. The method used is survey and purposive sampling. The data obtained were tabulated and descriptively quantitatively analyzed by multiple linear regression. The results showed that the beach experienced a dominant abrasion process in the period 1995-2023 compared to accretion with an abrasion rate of 77.94%. The highest average wear rate occurred in 2019-2023 of 3.86 m/year and the lowest in 2003-2007 of 1.9 m/year. Physical hydro-oceanographic factors at Pasir Jambak Beach have a significant influence on the abrasion phenomenon that occurs
The Effect of Rainfall and Wind on Fishermen's Fish Catches in Bungsus Harbor, West Sumatra Apriani, Cici; Elizal, Elizal; Tanjung, Afrizal
Journal of Coastal and Ocean Sciences Vol. 5 No. 1 (2024): 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/jocos.5.1.34-38

Abstract

The purpose of this study was to determine the effect of rainfall and wind on fish catches for fishermen at Bungus Ocean Port, West Sumatra. Rainfall and wind data were obtained from BMKG Teluk Bayur, Padang, while fish catch data were obtained from PPS Bungus staff, West Sumatra. The methods used in this research activity are the survey method and quantitative analysis. The results of this study showed that rainfall in the study area ranged from 0.01-15.4 mm, the average wind speed ranging from 1.0-1.6 m/s for the catch ranging from 334.983-560.145 kg. The results of the analysis between rainfall and wind on fish catches showed the correlation is not too intense because, based on the results of interviews, fishermen make voyage trips or fishing trips where fishing trips are carried out for more than one day, sometimes even more than one month, so additional data is needed for future research in the form of fishing trip data and data of ships departing per trip
Marine Eco-Climatological Conditions Captured in the West Waters of North Sumatra Nababan, Bastian Vepry Odynata; Samiaji, Joko; Elizal, Elizal
Journal of Coastal and Ocean Sciences Vol. 5 No. 2 (2024): 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/jocos.5.2.77-80

Abstract

Fishery resources in Indonesia, especially in the waters of the Western part of North Sumatra, are closely related to the oceanographic dynamics. Knowledge is needed about the conditions of Marine Eco-Climatology in fishing areas rich in fishery resources. This research was conducted in January-April 2021 at the Sibolga Archipelago Fisheries Port, Sibolga Fisheries and Marine Resources Supervisory Post, and College of Fisheries and Marine Science in Pandan Central Tapanuli. The research method was a survey method with a simple regression statistical test. Based on the results of this study, it was slowed that the air temperature in Sibolga City from 2010-2019 ranged between 23-28⁰C and was categorized as normal. The rainfall in Sibolga City in 2010-2019 ranged from 100-600 mm per month, and the wind speed value was 6-12 knots. The effect of these parameters on the catch showed a weak status. It was known that the best time to carry out the fishing is at average temperatures of 24-27⁰C, rainfall less than 3000 m3 /day, and wind speeds of 6-8 knots
GROWTH OF HETEROTROPHIC BACTERIA IN SEA WATER CONTAMINATED WITH RINSO DETERGENT Effendi, Irwan; Tanjung, Cahyani Fitrah; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 1 No. 1 (2018): December
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (399.501 KB)

Abstract

This research was conducted in March-April 2017 at Marine Microbiology Laboratory, Faculty of Fisheries and Marine University of Riau. The purpose of this study is to determine the different concentration of detergent (0 ml/L, 1.5 ml/L, 3 ml/L, 4.5 ml/L, 6 ml/L) in different observation time (0, 5, 10, 15, 20) on the growth of heterotrophic bacteria in sea water. Completely randomized design was used in this experimental method. The results showed that bacterial growth of all treated samples decreased on the 5th day of incubation. However, the population began to increase on the 10th day of incubation. The count of maximum bacterial growth was 1.46 x 109 found in the 4.5 ml/L treated detergent, and the lowest growth was 3.73 x 107 in the 1.5 ml/L treated detergent. Statistical analysis (ANOVA) showed that the concentrations in different observation times on the growth of heterotrophic bacteria showed significant effect and the value was (P <0.005).
GROWTH OF HETEROTROPHIC BACTERIA IN SEA WATER POLLUTED BY RINSO DETERGENT Tanjung, Cahyani Fitrah; Effendi, Irwan; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 1 No. 1 (2018): December
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.396 KB)

Abstract

This research was conducted in March-April 2017 at Marine Microbiology Laboratory, Faculty of Fisheries and Marine University of Riau. The purpose of this study is to determine the different concentration of detergent (0 ml/L, 1.5 ml/L, 3 ml/L, 4.5 ml/L, 6 ml/L) in different observation time (0, 5, 10, 15, 20) on the growth of heterotrophic bacteria in sea water. Completely randomized design was used in this experimental method. The results showed that bacterial growth of all treated samples decreased on the 5th day of incubation. However, the population began to increase on the 10th day of incubation. The count of maximum bacterial growth was 1.46 x 109 found in the 4.5 ml/L treated detergent, and the lowest growth was 3.73 x 107 in the 1.5 ml/L treated detergent. Statistical analysis (ANOVA) showed that the concentrations in different observation times on the growth of heterotrophic bacteria showed significant effect and the value was (P <0.005).
ANALYSIS OF ORGANIC AND ANORGANIC DEBRIS IN AIR MANIS BEACH, NIRWANA BEACH AND CAROLINA BEACH OF PADANG CITY WEST SUMATERA PROVINCE Aditya, M; Amin, Bintal; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 2 No. 3 (2019): December
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (811.928 KB)

Abstract

This research was conducted in June 2019 to determine the kind of marine debris, source, production and the correlation with the number of tourists in Air Manis, Nirwana, and Carolina Beach of Padang City, West Sumatera. Three sampling stations were surveyed. The results showed that marine debris found in those beaches were categoryses organic, such as: fruits, leaves, wood, bamboo, sea plants and else anorganic especially: plastic, glass, rubber, metal, etc. Air Manis Beach had the highest production of marine debris (1340 pcs), followed by Nirwana Beach (538 pcs) and Carolina Beach (500pcs). The source of marine debris were assessed to come from visitors and from outside those beac hes carried by sea current. The total of marine debris production was 29.165 kg. Plastic was the most common type of debris found. The production of garbage in the number of visitors shows very strong relationships (Y = -94,505 + 2,018x ; r = 0,97 ). There is strong correlation between the number of visitors and marine debris production in those beaches
POPULATION STRUCTURE OF THE Meretrix meretrix IN THE INTERTIDAL ZONE OF SRI TANJUNG VILLAGE RUPAT SUB-DISTRICT BENGKALIS DISTRICT Khoiriyah, Latifatul; Tanjung, Afrizal; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 7 No. 2 (2024): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.7.2.183-191

Abstract

This study aims to determine the population structure of Meretrix meretrix in the intertidal zone in Sri Tanjung Village, including abundance, distribution patterns, and size distribution. This research was conducted in February 2024 in Sri Tanjung Village, Rupat District, Bengkalis Regency. The research method used was the survey method. M. meretrix is one of the biota that lives in tidal areas where the subzone that experiences tides is divided into 3 (three) subzones (upper, middle, and lower). The research site is divided into two research stations. Each station is divided into 3 (three) transects, each consisting of 3 (three) plots with a size of 1 x 1 m². Environmental parameters include temperature, salinity, pH, substrate type, and organic matter. The results showed that the highest abundance was found in the Lower subzone at station I, with an average abundance of 8.66 ind/m2, and at station II, with an average abundance of 4.33 ind/m2. In comparison, the lowest abundance is found in the upper subzone at station I with an average value of 3 ind/m2, and the lowest abundance at station II with an average of 1 ind/m2. The size distribution of M. meretrix at station 1 obtained seven classes, with the highest number of individuals in the 3rd class (2.33 - 2.92 cm), while at station 2, there were six classes where the highest number of individuals was in the 3rd class (1.47 - 1.81 cm). The distribution pattern of M. meretrix found is random and uniform. The analysis results of M. meretrix abundance between stations and M. meretrix abundance between intertidal subzones differed significantly.
Co-Authors ', Zefendra Aditya, M Afrizal Tanjung Al-Izhar, Muhammad Amari, Tomi Andre Febriadi Zaryano, Andre Febriadi Andrian, Fikri Andriani, Fikri Anggie Agustian Apriani, Cici Aras Mulyadi Arbaeyah &#039; Ardiana, Eka Arif Teguh Satria Arinalhaq, Aminah Aristi, Fiona Armanda Armanda Armanda, Armanda Armani, Shanya Puthi Athhary, Dhiva Danaya Azmiada, Zela Azrihaironi, Azrihaironi Baruza Arrizqa Bayu Putra U Irawan Bintal Amin Cahyani Fitrah Tanjung Cici Lestari Manurung Cut Intan Zahara Darul Amin Debby Irfandinata Deddy Bahagia Manik Dedek Susanto Dedi . Dedi Muksin Pane, Dedi Muksin Desmarina, Y. Despela, Despela Dessy Yoswaty Dewita Dewita Dimas Agung Guntara Efriyeldi, Efriyeldi Elfis Suanto Fadhil, Yozi Ahmad fajar sidik Febrianto Roby Mukhti Fertikasari, Indah Fikri, Ishlahul Gaol, Amelia Risnauli br. Lumban Ginting, T.B. Giovano Aldizia Gusmanti, Afni Gustasya, Yosy Halida Sisda Harahap Hamidah Dasno Vera Handoyo, Edi Hari Mulyadi, Hari Harif, Ichwanul Hutabarat, Mona Uli Hutapea, Yeru Daniel Octryan Ibad, Rizky Nur Ide Rival Dianta Sitepu Ikhsan Setiawan Ilham Ilahi Indah Fertikasari Irfandi, Muhammad Adri Irvina Nurachmi Irwan Effendi Irwan Irwan Joko Samiaji Juliamanda, Ghina Juliando Saputra Khairil Ihsan Khoiriyah, Latifatul Lulu Mayna Nabilla Mahzwan Putra Pratama Manik, Everson Manik, Yolanda Marlan Tamba, Marlan Masyurah, Dzaitul Metry, Gita Mifdhol Hafli, Raja Diddin Moulidia, Candri Mubarak Mubarak Mubarak Mubarak Mubarak Mubarak Muhammad Sofyan Musrifin Galib Musrifin Ghalib Mutia, Safira Nababan, Bastian Vepry Odynata Nabila Afifah Azuga Nabilla, Lulu Nabilla, Lulu Mayna Ningrum, Astrid Kusuma Novhitasari Simbolon Novriadi, Yoga Nuriska, Alda Nuro, Syazliana Nursyirwani, Nursyirwani Ogesnain Sinaga Oriza, Syucitra Pambudi, Bagas Ariya Panjaitan, Sutrisno Pasaribu, Ridwan Saiful Basri Putri, Zulherija Rahdian Putra Rahmanda, Melysa Rahmi Relva Rahmita, R. Raja Yogi Prayoga Ramadhan Ramadhan Ramadhan Ramadhan Ramadhan, A.R Ramadhan, A.R. Ramadhan, Fauzi Raphita, Suci Ridwan Manda Putra Rifaldi Rifaldi, Rifaldi Rifardi Rio Aprialis Safitra Rizki, A. Romanta A. Tamba Romanta Andrianus Tamba Romauli, Junita Romel Kefriansa Putra Sanora, Fifi Saragih, Desra Agus Surya Sari, D.J. Satria Putra Anggara Seven, Diko Alafchan Sherly Ayunarita Sidabalok, Westy Yulia Sihotang, Nico Darminto Sihotang, Yula Elawati Simamora, Yohanna Beata Sinaga, Ade Ferdinus Sinaga, Ogesnain Situmorang, Ally Wibowo Sofyan H. Siregar Sofyan Husein Siregar Sri Dewi Utami Suci Monika Putri Sukendi Sukendi Syafruddin Nasution Syahril Nedi Syahwandi, Muhammad Tanjung, Cahyani Fitrah Tanjung, Cahyani Fitrah Thamrin &#039; Thamrin Thamrin Thamrin Thamrin Tiara Sri Mulawanti Tomi Suhendra Ulfa Rahmi Wahyu Novra Wanda Wahyudi Wahyudi Wendy, Lovvia Wenika Fitria Dona Yandra, Yoli Yanti, D.H. Yoga Novriadi Yozi Ahmad Fadhil Yusni Ikhwan Zani, Rahma Zientika, Zientika Zulkifli &#039; Zurma, Intan Alsyahkina