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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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Composition of the Catch of 28 GT Boat Bagan in Carocok Tarusan Waters, Pesisir Selatan District West Sumatra Province Afriadi, Ahmad; Mairizal, Mairizal; Magwa, Rizky Janatul; Alwi, Yun; Lisna, Lisna; Ramadan, Fauzan
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.5.3.185-188

Abstract

The waters of West Sumatra are one of the richest in Indonesia, and they have potential in the fisheries sector. They use various types of fishing gear, one of which is boat bagan. One of the most common fishing tools in fishing ports is the boat bagan in the waters of Carocok Tarusan, West Sumatra. The catches usually caught by boats are anchovies and tuna. The research aims to determine boat bagan composition in Carocok Tarusan Waters, Pesisir Selatan Regency, West Sumatra Province. This research was carried out on 20 July – 20 August 2023. The method used in this research was a survey method, with direct observations in the field and conducting interviews with fishermen. The tools used in this research were scales, a logbook, a cellphone camera, a ruler, a fishfinder, and a refractometer. The materials used are catches from bagan boats. The data is then calculated and differentiated between main catch, bycatch, and discard. The results of this research show that the composition of the main catch of boat charts is anchovies (Stolephorus spp) as much as 875 kg (24.7%) and tuna (Euthynnus affinis) 888 kg (25%). At the same time, fish that are bycatch consists of several types of fish, namely, trevally (Selaroides leptolepis) as much as 248 kg (7%), peperek (Aurigequula fasciata) as much as 710 kg (20%), mackerel (Rastrelliger sp) as much as 457 kg (12.9%), squid (Loligo sp) as much as 104 kg (2.93%), and mackerel scad (Decapterus) as much as 267 kg (7.5%), for the discarded catch, namely pufferfish (Tetraodontidae) as much as 0.25 kg (0.01 %). The discard catch consists of pufferfish
Diversity and Abundance of Gastropods in the Seagrass Ecosystem in the Teluk Bakau Village, Bintan Regency, Kepulauan Riau Province Purba, Dewi Nokiana F Br; Adriman, Adriman; Fauzi, Muhammad
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.5.3.189-194

Abstract

The diversity and abundance of gastropods are related to the condition of seagrass. In Teluk Bakau Village, anthropogenic activities such as tourism and fish catching negatively affect the seagrass ecosystem. To understand the diversity and abundance of gastropods in that area, a study was conducted in January-March 2023. Sampling was carried out at three stations: in the area close to human inhabitants (S1), ecotourism area (S2), and in the area with no human activity (S3). In each station, there were three transect lines; in each line, there were five plots (1x1 m2). Gastropod and seagrass samplings were conducted three times. Gastropods and seagrass were collected manually from each plot and then calculated and identified. Results showed eight species of gastropods and four species of seagrass. Abundance of Gastropods was 16.13 ind/m2 in S1, 11.6 ind/m2 in S2 and 50.53 ind/m2 in S3. The most abundant gastropod in the study area was Strombus canarium, which was present in each station. The seagrass density ranged from 51-113.86 plants/m2, and the most common seagrass was Enhalus acoroides, found in each station. The results of a simple linear regression test on the relationship between seagrass density and gastropod abundance was R = 0.975 (very strong)
Composition and Abundance of Marine Debris and Microplastic in the West Coast Mangrove Ecosystem of Bintan Island Anugrah, Septian; Syakti, Agung Dhamar; Suryanti, Ani
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.5.3.195-207

Abstract

Plastic waste has been identified as an environmental problem by the UN Environment Program because it causes damage to the marine environment, organisms, and critical habitats. One ecosystem vulnerable to plastic waste is mangroves, so the government continues to tackle this problem. Bintan Island has a relatively large mangrove ecosystem, and some of it is included in the vulnerable category, so it is necessary to conduct a study regarding plastic waste and microplastics on Bintan Island. The research aims to identify the abundance of macro and meso debris in the mangrove ecosystem area, the abundance and characteristics of microplastics in sediment in the mangrove ecosystem area, microplastic contamination in gastropods (Telescopium sp), the relationship between mangrove density and macro debris density, and the relationship between macro debris density and mesoderm and microplastic. The research was conducted in October 2021 in Bintan Regency and Tanjung Pinang City. Data was collected using survey methods, microplastic abundance analysis, and correlation analysis. The mass of macro debris in the Tanjungpinang City administrative area is 743 g/m2. It is dominated by plastic, with a percentage of 49%, and meso debris, 94% of the total waste, is dominated by plastic waste. The characteristics of microplastics in sediment at each sampling location consist of fibers, fragments, and films. The most common microplastic contamination in Telescopium sp in the Bintan Regency area was film-type microplastics, totaling 198.33 particles. The relationship between mangrove density and macro debris generation is very strong, with a correlation value of 0.872. The relationship between the abundance of macro debris and meso debris and microplastics was strong, with correlation values of 0.972 and 0.793, respectively
The Effect of Coral Reef Ecological Changes on the Socio-Economic Community in Mapur Village Adrinal, Adrinal; Wahyudin, Wahyudin; Lestari, Febrianti
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.5.3.208-214

Abstract

The condition of coral reefs is still good on Mapur Island, which benefits community activities such as fishing and marine tourism. However, continuous activities can degrade the coral reef ecosystem, so the government has made it a Marine Conservation Area for the Eastern Region of Bintan Island. This research aims to determine the ecological condition of coral reefs on Mapur Island, the influence of the coral reef ecosystem on socio-economics, as well as the impacts felt before it was designated and after it was designated as a conservation area in Mapur Village, Marine Conservation Area in the Eastern Region of Bintan Island. The results show that increasing live coral cover and decreasing dead coral cover have shown a positive recovery trend. Establishing a coral reef ecosystem conservation area in Mapur Village has several substantial impacts. Even though most people have good knowledge and perception about the function and benefits of conservation areas, primarily as fish habitats, the main challenge still lies in access to infrastructure, which is considered inadequate. The economic impact of establishing a conservation area is not yet significant because most people do not see a substantial increase in income. However, the community feels support for their livelihoods through the sustainability of fish resources. Changes in coral cover on the socio-economic conditions of the people of Mapur Island influence the ecosystem and local communities, fisheries and marine resources, the marine tourism sector of Mapur Village, natural resource management, direct economic influence, diversification of livelihoods, education, and environmental awareness, improving infrastructure and facilities, as well as challenges and limitations
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
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.6.1.16-22

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
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
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.6.1.39-43

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
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
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.6.1.1-4

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
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
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.6.1.5-9

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
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
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.6.1.30-38

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.
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
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.6.1.23-29

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

Page 14 of 30 | Total Record : 293

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