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Journal of Coastal and Ocean Sciences
Published by Universitas Riau
ISSN : 27454355     EISSN : 27464512     DOI : -
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Physics
Journal of Coastal and Ocean Sciences is a journal publishes scientific articles from research by lecturers and other researchers in the marine sector. Covers aspects of biology, physics and chemistry, both for brackish waters (mangrove swamps, river estuaries) and marine waters (coastal and offshore seas).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 293 Documents
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Nematocytes in the Coral Species Acropora formosa on Kasiak Island, Pariaman City, West Sumatera Pratama, Bima; Thamrin, Thamrin; Nursyirwani, Nursyirwani
Journal of Coastal and Ocean Sciences Vol. 6 No. 1 (2025): January 2025
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.6.01.39-43

Abstract

This research was conducted in January 2024 on Kasiak Island, Pariaman City, West Sumatra Province. This research aims to identify nematocytes found in the body tissue of the Acropora formosa coral. The method used in this research is a survey method with direct observation and sampling in the field. Determination of the type of nematocytes from A. formosa coral was carried out using an Olympus microscope with an objective lens magnification of 10X40 (400) at the Marine Biology Laboratory, Faculty of Fisheries and Marine, Universitas Riau. Of the 25 main types of nematocytes known in the phylum Cnidaria, one type was found in this species. The results of the research show that there is a type of Holotrichous isohiza in the A. formosa coral. This type of nematocyte is thought to be used to attack and kill prey
Fermentation of Livestock Blood Waste as Fish Feed Ingredient Andriani, Yuli; Dipatiguna, Siti Nisrina Ulfah; Putra, Vito Dwisetia; Prasadi, Marsel; Aisyah, Aisyah
Journal of Coastal and Ocean Sciences Vol. 6 No. 1 (2025): January 2025
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.6.01.44-50

Abstract

Livestock blood waste has significant potential to be utilized as an alternative feed ingredient due to its high protein content, reaching up to 80%, and abundant availability. However, blood waste is known to contain high levels of iron and an imbalanced amino acid profile. Based on these issues, one potential solution is to ferment livestock blood waste to enhance its nutritional value. This review article aims to compile and analyze various effective fermentation methods and identify best practices in the fermentation process of livestock blood waste. Fermentation can be carried out using various microbes, mainly lactic acid bacteria. Fermentation treatment of livestock blood waste with lactic acid bacteria using lactic acid concentrations ranging from 3% to 6% produces blood waste with a well-balanced nutritional profile. Meanwhile, the optimal use of blood waste as an alternative feed ingredient for fish is achieved by adding formic and propionic acids at doses of 1.5%–3%, improving fish protein digestibility by 94.66%. This indicates that livestock blood waste can be an alternative raw material in fish feed production
Effects of Fermentation on the Physico-Chemical Properties of Marine By-Products: A Review Shobihah, Hasna Nabila; Andriani, Yuli; Wiyatna, Muhammad Fatah; Iskandar, Iskandar; Zidni, Irfan; Rustama, Mia Miranti
Journal of Coastal and Ocean Sciences Vol. 6 No. 1 (2025): January 2025
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.6.01.51-58

Abstract

Marine by-products hold significant potential to be utilized as raw materials with added value, particularly in producing high-quality and environmentally friendly fish feed. This study aims to review the impact of fermentation on the physical and chemical properties of marine by-products. The method employed is a narrative literature review, referencing scientific literature from databases such as ScienceDirect and Google Scholar. The literature analysis highlights changes in physical structure, such as alterations in color and odor, that contribute to improved feed digestibility. In addition, fermentation also increases nutrient content, including proteins and essential amino acids, and produces bioactive compounds that act as antimicrobials and antioxidants. This study identifies that fermentation reduces waste and enhances its economic value for various applications, such as fish feed and alternative raw materials. Thus, this review provides innovative solutions for marine by-product management while supporting sustainability and efficiency principles in the fisheries industry
Stock Assessment and Sustainable Potential of Skipjack Tuna (Katsuwonus pelamis) in Sibolga Waters for Optimized Fishing Practices Limbong, Irwan; Brown, Arthur; Isnaniah, Isnaniah; Kholis, Muhammad Natsir
Journal of Coastal and Ocean Sciences Vol. 6 No. 1 (2025): January 2025
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.6.01.59-64

Abstract

The uncontrolled fishing of skipjack tuna (Katsuwonus pelamis) without recruitment efforts has led to stock degradation and unstable abundance due to excessive pressure. This study aims to estimate the sustainable potential of skipjack tuna by calculating Catch per Unit Effort (CPUE), assessing Maximum Sustainable Yield (MSY), and determining Total Allowable Catch (TAC). The research was conducted at PPN Sibolga and utilized survey-based data collection and surplus production analysis using the Schaefer model. The findings indicate that standardized CPUE in 2018 was 0.639 tons/trip, increased to 0.764 tons/trip in 2019, dropped to 0.527 tons/trip in 2020 and 0.506 tons/trip in 2021, and returned to 0.639 tons/trip in 2022. Purse seines were identified as the primary fishing gear. The Schaefer model estimated CMSY at 8,699.7 tons, classifying the fishery as fully exploited. FMSY was calculated at 5,447 trips, with annual efforts consistently exceeding this threshold, indicating overfishing. The TAC was set at 6,959.7 tons. Management strategies should regulate fishing efforts, enforce gear specifications, and implement science-based fisheries policies to prevent further degradation. Aligning fishing activities with sustainable thresholds will support skipjack tuna stocks' recovery and long-term productivity. These findings underline the importance of adaptive management and collaboration to sustain marine ecosystems and protect livelihoods.
Sea Surface Temperature Distribution Mapping and the Relation with Coral Reef Distribution Using Modis Aqua Imagery in the Waters of Padang City Noprianda, Renza; Mubarak, Mubarak; Siregar, Yusni Ikhwan
Journal of Coastal and Ocean Sciences Vol. 5 No. 3 (2024): 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.5.3.143-150

Abstract

Mapping sea surface temperature and coral reef distribution is vital for understanding the marine environment's dynamics and developing effective conservation strategies. The ideal temperature for coral reefs is between 27-29ºC. This research aims to describe and analyze the relationship between sea surface temperature and chlorophyll-α to the potential zone of coral reefs in Padang City, West Sumatra. The data used in this research is MODIS Aqua level 3 imagery data with 4 km resolution. The imagery processing stages include imagery data processing using SeaDAS software, namely the cropping and reprojection process, and ArcGIS software, namely the interpolation and classification process and map layouting. The results showed that the classification of the distribution of sea surface temperature in Padang City ranged from 26-29ºC, and the average concentration of chlorophyll-α distribution was 1.41 mg/m3. Based on these results, it can be concluded that Padang city waters have an ideal sea surface temperature for coral reefs and are supported by a reasonably high chlorophyll-α concentration.
Tidal and Bathymetry Characteristics in Dumai River Estuary in Dumai City, Riau Province Maulana, Fariz; Mubarak, Mubarak; Rifardi, Rifardi
Journal of Coastal and Ocean Sciences Vol. 5 No. 3 (2024): 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.5.3.151-158

Abstract

This research was carried out in July 2023 in Muara Sungai Dumai, Dumai City, Riau Province. This study aims to conduct depth mapping analysis using echosounders based on reference corrections to tides. Tidal analysis is performed to determine reference values such as MSL (Mean Sea level) and tidal characteristics. The methods used are survey methods and quantitative analysis. The results showed that the waters of the Dumai River Estuary were mixed tide prevailing semi-diurnal with a formzahl value of 0.29. There is tidal asymmetry with the time to the high tide faster than the time to low tide. The depth ranges from 0.28 to 7.34 m, increasing to 40 m in the Rapat Strait. The weak current and the difference in HHWL values of 3.55 m and MSL 0.14 m affect water level rise due to bathymetric changes at high tide.
Analysis of Marine Ecotourism Suitability Based on Physical Environmental Conditions and Water Quality Index at Arta Sungai Limau Beach, Padang Pariaman Regency Livi, Aldisa Sipti; Mubarak, Mubarak; Yoswaty, Dessy
Journal of Coastal and Ocean Sciences Vol. 5 No. 3 (2024): 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.5.3.159-165

Abstract

Marine ecotourism is a type of tourism that involves activities related to marine activities carried out under or above the sea surface. Marine ecotourism generally covers three areas: the sea surface, under the sea, and on the coast. Marine ecotourism activities, especially beach tourism, are highly dependent on the condition of the oceanographic parameters of the region for the safety and comfort of tourists. This research was conducted in Arta Beach, Padang Pariaman Regency, West Sumatra Province, to determine the suitability of marine ecotourism at Arta Beach based on the parameters of physical environmental conditions. This study used a survey method: observation and data collection at the research location. Data analysis is used for the Tourism Suitability Index (IKW) method for physical environmental parameters and the STORET method for water quality parameters. The results of this study indicate that the tourism suitability index based on the physical condition of the environment carried out at Arta Beach at station 1 received a value of 2.49, including the suitable category, at station 2 received a value of 2.5, including the suitable category and station 3 received a value of 2.49 including the suitable category. The overall average value of IKW on Arta Beach is 2.49, included in the suitable category. This value means this beach can be used for beach ecotourism. Water quality parameters are analyzed using the storey method. The data obtained from the pH, DO salinity, and temperature parameters meet the quality requirements (good condition) and are suitable for marine tourism activities
Analysis of the Relationship Between Phytoplankton Abundance and Total Oil Content in Bayur Bay Waters, Padang City, West Sumatera Province Ghifari, Muhammad Fadil; Nurrachmi, Irvina; Effendi, Irwan
Journal of Coastal and Ocean Sciences Vol. 5 No. 3 (2024): 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.5.3.166-174

Abstract

The research was conducted in January - February 2024 in the waters of Teluk Bayur, Padang City, West Sumatra Province. This study analyzes the relationship between total oil content and phytoplankton abundance in Bayur Bay waters. The method used in this study is a survey method with a purposive sampling technique. Based on the results found. The value of oil content at each station and sampling point varies. The highest value is obtained at station III with an average value of 0.00005387 ppm, while the lowest is obtained at station IV with a content value of 0.00001153 ppm. In the Bayur Bay waters, 16 species of phytoplankton were found, consisting of Bacillariophyceae (10 species), Cyanophyceae (2 species), Coscinodiscophyceae (2 species), Dinophyceae (1 species), Raphidophyceae (1 species). Phytoplankton abundance in Bayur Bay waters shows different values for each station, where the highest average phytoplankton abundance is found at station IV, with a total of 9216.55 (ind/L). In contrast, the lowest abundance is found at station I, with a total of 1016.77 (ind/L). The results of linear regression analysis, the relationship between phytoplankton abundance and oil content in Bayur Bay waters at each station obtained a mathematical equation y = 6245.3 + (-7E+07x) with a coefficient of determination R2 = 0.3016 and the correlation coefficient r = 0.5491. With the conclusion that the relationship between phytoplankton abundance and total oil content in Bayur Bay waters is included in the average group.
Determination of Competence, Work Discipline, and Utilization of Technology towards Public Satisfaction Through Service Quality in the Fisheries Service of Karimun Regency Syamsurizal, Syamsurizal; Ngaliman, Ngaliman; Yanti, Sri
Journal of Coastal and Ocean Sciences Vol. 5 No. 3 (2024): 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.5.3.175-180

Abstract

High employee competency will ensure that every task and responsibility can be completed effectively and efficiently. Good work discipline will create an orderly and productive work environment, improving the quality of services provided to the community. Technology also plays an equally important role; because of sophisticated technology, service processes can be carried out more quickly and accurately, reducing human error and increasing people's comfort in accessing public services. The research aims to determine the effect of competence, work discipline, and the use of technology on community satisfaction through service quality. The study was conducted for 5 months (March –July) at the Karimun Regency Fisheries Service. Quantitative research methods were analyzed using the Smart PLS application from questionnaire data with 201 respondents and concluded that there is a direct determination of employee competency, work discipline, use of technology, and service quality on community satisfaction in the Karimun Regency Fisheries Service area. There is a determination of employee competency in work discipline and the use of technology directly on the quality of services of the Karimun Regency Fisheries Service. It is recommended to the Head of the (Karimun Regency Fisheries Service: 1) optimize the number of employees who take part in work competency training, especially regarding increasing knowledge and skills according to the fields listed. 2) Providing training programs or seminars to improve employee work discipline regarding the importance of arriving on time, effectively using time, compliance with agency regulations, and achieving work targets. 3) Optimizing an integrated information system in providing services and basic skills using the latest technology, which can help communicate with the service user community by keeping up with the latest technological developments and meeting needs in completing tasks appropriately based on the availability of information.
The Effect of Coconut Water on Increasing Biomass Production of Marine Algae (Kappaphycus alvarezii) Ode, Sri Jafitra Taufik; Tuiyo, Rully; Mulis, Mulis
Journal of Coastal and Ocean Sciences Vol. 5 No. 3 (2024): 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.5.3.181-184

Abstract

A shortage of seeds and low-quality production of the marine algae Kappaphycus alvarezii are classic problems that farmers encounter. Therefore, growth hormones, a natural ingredient in young coconut water, must be used. This research aimed to analyze the growth rate of the marine algae K.alvarezii using coconut water immersion treatment at different times (0 minutes, 30 minutes, 40 minutes, and 50 minutes) with an initial weight of 50 g. This research was conducted in South Sulawesi, Wakatobi Regency, Wangi-Wangi Selatan District, Liya One Melangka Village from June to October 2023. This research used the RAL method to measure the weight of the marine algae Kappaphycus alvarezii every 10 days and measure water quality for 40 days. The results of the ANOVA analysis in the soaking treatment of K.alvarezii sea algae seeds showed significant effects.

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