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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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Study of Fishing Ground Determination Based on Chlorophyll-a Distribution in Sibolga Waters using Aqua Modis Satellite Pasaribu, Parlin S; Mubarak, Mubarak; Galib, Musrifin
Journal of Coastal and Ocean Sciences Vol. 2 No. 1 (2021): 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.2.1.61-65

Abstract

This study aims to determinate the fishing ground, based on chlorophyll-a distribution in Sibolga marine waters every month throughout 2019 using Aqua Modis Satellite. The method used in was survey method and room analysis method to know directly of fishing ground determined by fisherman and to analysed satellite aqua modis imagery. The water quality measurements were carried out to describe of general conditions research area. The parmeters measured include water temperature, water transparency, salinity, ph, depth and current. Sibolga sea surface temperature ranges from 26-300C, water transparency ranges from 170-210 cm. water salinity ranges between 26-29 ppt, the degree of acidity (ph) ranges from 6,8-8. The depth ranges from 15-22 m,  and current velocity 0.21-0.40 m/s. Based on the results it is known that the chlorophyll-a concentration a ranges from 0.001 to 5,000 mg/m3. Highest chlorophyll-a concentration occurs in October with a range of 3,500 to 5,000 mg/m3, while the lowest chlorophyll-a concentration occurred in February with a range 0,001 to 0,500 mg/m3. Based on the chlorophyll-a average troughout the year the potential for fishing ground is in Sorkam and Kolang water
Effect of Sediment Particle Sizes on The Density and Morphometrics of Seagrass Enhalus acoroides Leaves at Pandaratan Beach Tapanuli Tengah Banjarnahor, Novia; Samiaji, Joko; Nasution, Syafruddin
Journal of Coastal and Ocean Sciences Vol. 2 No. 1 (2021): 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.2.1.53-60

Abstract

This study was conducted in March - May 2020 at Pandaratan Beach Tapanuli Tengah with the aims in observing the size of the sediment particles, the density of Enhalus acoroides, the morphometrics of seagrass leaves, and to analyze the effect of the average sediment particle size on the density and morphometrics of the seagrass leaves. The study used a survey method. Study stations were choosen by purposive sampling and the samples were observed by using a transect line method. The results showed that the particle size ranged from 0.097 - 0.364 mm. The highest density was at Station II with fine sand categories with a value of 37.89 stands/m2 and the lowest density was at Station I with medium sand sediment particles with a value of 25.44 stands/m2. The longest leaves was found at Station II with a value of 84.09 cm and the shortest was at Station I with a value of 65.93 cm. The widest leaves of E. acoroides was at Station II with a value of 1.92 cm and the narrowest was at Station I with a value of 1.81 cm. Simple linear regression test showed that effect of the sediment partikel size on the density and morphometrics of seagrass leaves
Overview of Indicator Coral Fish in Poncan Islands, Sibolga, North Sumatra Pratama, Nanda; Samiaji, Joko; Thamrin, Thamrin
Journal of Coastal and Ocean Sciences Vol. 2 No. 1 (2021): 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.2.1.66-72

Abstract

This study aims to determine the effect of coral reef conditions on the abundance of coral reef fish indicators of the Chaetodontidae family and to be compared descriptively. This research was conducted in February-April 2020 in Poncan Island coast, Sibolga City, North Sumatra Province. The method used in this research was a survey method, the data obtained directly on site in the form of primary data, while the secondary data was collected from the related institutions and references. The method for quantifying the number of fish used was Underwater Visual Census (UVC), for collecting data on coral reef fish indicators was using the Line Intercept Transect (LIT) method supported by SCUBA (Self Contained Underwater Breathing Apparatus). The results showed that the abundance of coral reef fish indicators for the Chaetodontidae family and coral reefs were in the average of 0-0.052 individuals/m2. The lowest abundance was found at stations 1 and 5, while the highest abundance was seen at station 2 with an average of 0.0248 individuals/m2. The abundance of live coral ranged from 5 - 51.8%. The lowest abundance was at station 1 and the highest was at station 4 with an average abundance of 30.804% which is categorized as moderate. The abundance of indicator reef fish in the waters of Poncan Island was influenced by the condition of coral reefs where in this study the abundance of live coral reefs was less than 23.02%. There was no indicator reef fish at the station
Analysis of Potential Development of Bahari, Muara Nauli Beach, Central Tapanuli District, North Sumatera Province Kurnia, Fadly Agra; Samiaji, Joko; Yoswaty, Dessy
Journal of Coastal and Ocean Sciences Vol. 2 No. 1 (2021): 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.2.1.73-79

Abstract

This research was conducted in November 2019 at Muara Nauli Beach, Central Tapanuli Regency, North Sumatra Province. With the aims to determine the potential of marine ecotourism at Muara Nauli Beach and its development strategy. The method used in this study was a survey method by collecting qualitative and quantitative data in the form of interviews, questionnaires and direct measurement. The research location was divided into 3 station points, namely Station I near the river estuary, Station II where swimming and relaxing activities are located, Station III is located at the location of tourist facilities. The results showed that the tourism suitability index, the suitability value for tourism activities at Muara Nauli Beach, were in the very suitable category (S1), with values ranging from 96.43-97.61% and an average value of 97.22%. This value was included in the very suitable category as ecotourism and can be used as marine ecotourism. Muara Nauli Beach has an attraction of natural beauty in the forms of white sand, turbid blue waters, spot for swimming activities. Muara Nauli Beach also has a large and beautiful estuary that can be used for fishing and a spot for taking pictures and viewing of the sunset. The natural beauty makes a great opportunity for Muara Nauli Beach to be developed as a marine ecotourism area
Analysis of Chlorophyll-a Distribution in Determining the Fishing District of (Euthynnus affinis) Using Satellite Images in North Sumatera Sea Flows Arta, Fandi; Afriani, Afni; Karisma, Rizki
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.6.01.5-9

Abstract

The North Sumatra Sea waters are one of the potential areas for tuna (Euthynnus affinis) fisheries. However, fishermen's determination of fishing grounds still relies on traditional methods, such as observing seabirds and water color changes, which are often inaccurate. This study aims to determine chlorophyll-A distribution, the accuracy of tuna fishing areas, and the relationship between chlorophyll-A and catch using satellite imagery. This research is beneficial because it is helpful reference material for the fishing industry and the community regarding the relationship between chlorophyll-a and fishing grounds. This research was conducted from April 05 to April 29, 2024, using Aqua Modis satellite image data. The research method used was a survey method that was analyzed descriptively. The results obtained during the study showed that the highest chlorophyll-a concentration occurred in the period April 22 to April 29, 2024, with an average value of 8.71 mg/m3, and the lowest occurred in the period April 06 to April 13, 2024, with an average value of 4.83 mg/m3. Determination of the estimated fishing grounds for tuna (Euthynnus affinis) with overlay technique by shading the chlorophyll-a criteria area >0.1 mg/m3. The accuracy level of the estimation of tuna fishing grounds has an average accuracy of 52%. Chlorophyll-a and catches in North Sumatra Sea Waters have a very strong relationship with an R-value of 0.99
Assessing the Contribution of Marine Fisheries to the Indonesian Economy Mardhani, Martahadi; Syardiansah, Syardiansah; Amilia, Suri; Aswadi, Khairul
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.6.01.1-4

Abstract

Marine fisheries significantly contribute to the economy of many regions and countries. This study aims to analyze the contribution of marine fisheries to economic growth in Indonesia. Johansen cointegration (JC) test and Fully Modified Ordinary Least Squares (FMOLS) are applied to investigate the contribution of the marine fisheries sector to economic growth. This study uses time series data from Statistics Indonesia (BPS) and the Ministry of Maritime Affairs and Fisheries (KKP) from 2010 to 2022. The findings indicated a long-term equilibrium among the measured variables. Marine fisheries have a significant and contributing effect on long-term economic development. The data demonstrate that the fisheries sector has become a source of food, job creation, and welfare for fishermen
Distribution of Sea Surface Temperature and Salinity in the Karimata Strait Yuliardi, Amir Yarkhasy; Firdaus, Randi; Heltria, Septy; Prayogo, Luhur Moekti; Nugroho, Agung Tri; Rahmalia, Diah Ayu; Sari, Ratna Juita
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.6.01.10-15

Abstract

The Karimata Strait possesses unique characteristics influenced by its geographical location and the local, regional, and global impacts on its physical, biological, and chemical parameters, contributing to its potential as a significant fishing ground. This study aims to observe and analyze the physical oceanographic parameters, including temperature, salinity, and sea surface currents, within the Karimata Strait. The dataset comprises monthly averaged data, resulting in a single representative value for each month. Key physical parameters examined include temperature, salinity, and the horizontal (u) and vertical (v) current components. The patterns of sea surface temperature (SST) and salinity distribution in the Karimata Strait exhibit significant variations between the west and east monsoons. During the west monsoon season, the South China Sea influenced the region with lower SST and higher salinity than the Java Sea. In contrast, the east monsoon demonstrates an inverse pattern with warmer, fresher waters from the Java Sea moving towards the strait. Additionally, the horizontal distribution of these parameters highlights the critical role of sea currents in dispersing physical oceanographic characteristics within the region. These findings underscore the dynamic nature of the Karimata Strait's oceanography, influenced by seasonal monsoon shifts, water masses from adjacent seas, and freshwater inputs from rivers, crucial for understanding the broader Indonesian Throughflow (ITF) system and its implications for regional climate and marine ecosystems
Relationship Between Tree Diameter and Mangrove Vegetation Carbon Stock in Apar Village, Pariaman City, West Sumatra Gusfi, Melly; Efriyeldi, Efriyeldi; Mulyadi, Aras
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.6.01.16-22

Abstract

This research was conducted in January 2024 in the Mangrove Area of ​​Apar Village, Pariaman City, West Sumatra Province. This research aims to determine mangroves' density and carbon stock conditions and the relationship between the diameter of mangrove trees of the Rhizophora mucronata, Sonneratia caseolaris, and S.alba types with mangrove carbon stock. The method used in this research is a survey method with direct observation and data collection at the research location. Non-destructive sampling measured the diameter of mangrove trees' breast height in each plot. The average density of mangrove stands at the three research stations was 1,222.22 tons/ha, the average amount of mangrove biomass was 688.49 tons/ha, the average amount of mangrove carbon stock was 323.59 tonnes/ha, and the average mangrove CO₂ uptake is 1,186.51 tons/ha
Abundance and Diversity of Mushroom Coral of the Fungiidae in the Waters of Pasumpahan Island, West Sumatra Pratama, Farrel; Thamrin, Thamrin; Nurrachmi, Irvina
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.6.01.23-29

Abstract

Mushroom coral (Fungiidae) is one of the families of hard corals (scleractinian) that live off the substrate (free-living), and most of the mushroom coral habitat is found on the reef slope, which has a substrate of broken coral. This study aimed to analyze the abundance and diversity and determine the differences in abundance of mushroom corals at different depths. This research was conducted in March 2024 in Pasumpahan Island, West Sumatra. This study used the survey method and belt transect method. The sampling location was divided into three stations consisting of 3 sampling points. Station I is located in the tourist area, Station II is in the dock area, and Station III is in the area facing the open sea. The results showed that the highest abundance based on depth was found at station III with a depth of 7 m, namely 4357.14 ind/Ha and the lowest abundance at station II with a depth of 5 m, namely 1285.71 ind/Ha. The t-test results obtained a significant value of less than 0.05, namely 0.048, which means that the abundance of mushroom corals at different depths is significantly different. The diversity index ranges from 1.930 to 2.013, which shows that the level of diversity of mushroom corals in the waters of Pasumpahan Island is classified as moderate
Estimation of Carbon Stock of Sediment in Mangrove Ecosystem of Apar Village, North Pariaman Sub-District, West Sumatra Saputra, Muhammad Nasrul; Nedi, Syahril; Siregar, Yusni Ikhwan
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.6.01.30-38

Abstract

Global warming is one of the issues in the world today, characterized by an increase in the earth's temperature due to greenhouse gases. Mangrove forests are one of the blue carbon parameters that can utilize CO2 for photosynthesis and store it in the form of biomass and sediment well. Sediments serve as a growing medium and a place to accumulate various components, including carbon. Carbon stored in mangrove sediments tends to be greater than in other types of forests. The study aimed to determine sediment carbon stocks based on density and the relationship between mangrove density and estimated carbon stocks in sediments in the mangrove ecosystem of Apar Village, North Pariaman District. Mangrove sediment sampling was carried out using the Purpose Sampling technique, and the data obtained were analyzed using the Loss on Ignition method. The results showed that the highest average carbon stock in sediments was found at station 2 with medium density, which was 215,03 tonnes/ha, followed by station 3, which had a high density, with a value of 197,98 tonnes/ha, and the lowest average carbon stock was found at station 1 with medium density, which was 132,43 ind/ha. Future research is expected to observe carbon stocks in mangrove stands and litter in the Apar Village mangrove ecosystem to obtain more detailed information

Page 16 of 30 | Total Record : 293

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