Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau
Level of Compliance and Perception of Beach Seine Fishers in Pasir Putih Beach, Padang City, West Sumatra Province towards Sustainable Capture Fisheries
Research has been conducted at Pasir Putih Beach, Padang City, West Sumatra Province, which aims to describe the socioeconomic characteristics of beach trawl fishers, determine the level of compliance of beach seine fishers, determine the perceptions of beach seine fishers towards environmentally friendly fishing gear, and fishers' perceptions of the existence of fish resources. This type of research is descriptive, using a survey method. The sample consisted of 10 respondents, using a purposive sampling technique. Data collection techniques included observation and interviews, with questionnaires for respondents. The analyses used were descriptive, proportion distribution, and Spearman's rank correlation. The results of this study indicate that the socioeconomic characteristics of fishermen at Pasir Putih Beach, Padang City, West Sumatra Province, show that the majority are 46-65 years old and have low education, namely elementary school education. Experience as a fisherman exceeds 15 years. Then, in the income section, the dominant fishermen earn below UMP, with 8 people. Regarding the Number of dependents, most fishermen have 3-4 dependents, up to 5 people, with a 50% share. Beach seine fishers have a very low level of compliance, as they use prohibited gear, violate fishing line regulations, and lack documents.
Copyright (c) 2025 Wira Gusfa Devi, Jonny Zain, Isnaniah Isnaniah (Author) https://creativecommons.org/licenses/by/4.0
Time Efficiency for Replenishment of Sea Supplies Hand Line Fishing Vessel at Bungus Fishing Port, West Sumatra
Efficiency is the proper use of time, with no waste or loss. One of the important time efficiencies at the fishing port is the time of filling sea supplies, where the more efficient the time of filling sea supplies, the smaller the mooring costs that fishermen must incur, and the shorter the queue of ships filling sea supplies. Because many ships load and unload at the PPS Bungus dock, this results in a lack of mooring space and a queue of ships when refueling at sea. The time for filling sea supplies on hand line vessels at PPS Bungus is carried out the day before ship departure due to a lack of mooring space. This study aims to determine the time efficiency of filling sea supplies on handline vessels at PPS Bungus and to identify the factors that affect time efficiency. The method used is a survey of 20 handline vessels. Based on the study's results, the efficiency of filling time for marine supplies on hand line vessels ranges from 64.11% to 80.00%, with an average of 71.11%, indicating it is less efficient. The amount of wasted time is influenced by ship tonnage (x1), number of crew (x2), block ice (x3), amount of fuel (x4), clean water (x5), length of block ice track (x6), length of fuel track (x7), length of clean water (x8), length of food (x9) with multiple regression equation Y = 138.522 + 0.185 X1 + 1.012 X2 - 0.023 X3 + 0.482 X4 - 0.015 X5 - 0.889 X6 + 0.884 X7 -,163 X8 + 1.004 X9. The level of time efficiency in filling sea supplies for handline vessels is influenced by the time wasted, with a coefficient of determination (R2) of 78.4%.
Copyright (c) 2025 Wina Putri, Jonny Zain, Polaris Nasution (Author) https://creativecommons.org/licenses/by/4.0
Efficiency of Tuna Unloading Time Hand Line Vessels at Bungus Fishing Port, West Sumatra Province
Tuna fish is one of Indonesia's leading commodities from the fisheries sector because it has high economic value. Fish unloading refers to the activities carried out by the crew after the ship arrives at the fish landing site. Efficiency, technically, refers to the ability of humans to carry out a task accurately without wasting energy, time, or money. Handline vessels are specifically designed to catch large pelagic fish, such as tuna, using handline gear. The purpose of this study was to determine the efficiency of tuna unloading time on hand-line vessels at Bungus Ocean Fishing Port and the factors that influence it. The research method used in this study is the survey method, namely direct observation of tuna unloading activities on handline vessels at the Bungus Ocean Fishing Port dock in West Sumatra Province. Based on research on tuna unloading activities on handline vessels at PPS Bungus, it can be concluded that unloading efficiency tends to vary, ranging from 44.19 to 85.19% with an average of 63.01%. This shows that the tuna unloading process on handline vessels at PPS Bungus tends to be less efficient. The amount of wasted time is influenced by ship tonnage (x1), number of fish (x2), unloading speed (x3), ship unloading power (x4), freeboard height (x5), with multiple regression equations Y = -35.662 + 293 X1 + 1,277 X2 - 6,467 X3 +793 X4 +328 X5. The level of tuna unloading efficiency on handline vessels is influenced by the time wasted, with a coefficient of determination (R2) of 72,5%.
Copyright (c) 2025 Rahmi Rahmadhani, Jonny Zain, Alit Hindri Yani (Author) https://creativecommons.org/licenses/by/4.0
Production Factors on Hand Line Catch Results at the Ocean Bungus Fishing Port, West Sumatra Province
In 2020, the production volume of fish landed at PPS Bungus reached 4,776.14 tons. In 2021, the production volume increased to 5,531.41 tons. From this data, it can be concluded that there was a significant increase in fish production from 2020 to 2021, from 755.27 tons to 1,510.54 tons. Therefore, it is necessary to analyze the factors that affect the catch. This study aims to determine which factors affect hand line catch production and the relationships between these factors and hand line catches. This research will be conducted in May 2023 at PPS Bungus, West Sumatra Province. The method used in this research is the survey method, involving direct field observations, the collection of primary and secondary data, and interviews with handline boat fishermen. The results of the regression analysis showed that the ship's tonnage (X1), engine power (X2), crew (X5), skipper experience (X6), and cost of supplies (X7) significantly influenced the catch. In contrast, the length of time at sea (X3) and the number of fishing rods (X4) did not show a significant effect.
Copyright (c) 2025 Salsa Nur Fadillah, Isnaniah Isnaniah, Bustari Bustari (Author) https://creativecommons.org/licenses/by/4.0
Effect of Moringa Leaf (Moringa oleifera) Liquid Fertilizer on Growth of Spirulina platensis
Spirulina platensis is a microalga widely cultivated and high in protein, making it a potential natural feed. Moringa leaves (Moringa oleifera) have a nutritional value greater than that of plants in general and are widely used as a plant fertilizer. This study aims to analyze the effect of Moringa leaf liquid fertilizer on the growth of S. Platensis and to determine the optimal fertilizer concentration. The research method used was an experimental design with direct observation during data collection. The Completely Randomized Design (CRD) used consisted of 5 treatments, namely the addition of 3 mL/L (A), 5 mL/L (B), and 7 mL/L (C) Moringa leaf liquid fertilizer, positive control (D), and negative control (E), where each treatment was performed for 3 repetitions. Culture of S. platensis was carried out for 7 days, with water quality parameters, including salinity, pH, and temperature, measured. Cell density and chlorophyll-a content were measured daily. The research results showed that water quality was good. The highest cell population density was observed in treatment C (7 mL/L), with a density of 754,000 cells/mL. The chlorophyll-a content did not significantly increase when liquid fertilizer from Moringa leaves was applied (p>0.05). Based on the results, applying Moringa leaf liquid fertilizer positively affects the cell population density of S. platensis, with an optimal concentration of 7 mL/L.
Copyright (c) 2025 Winda Wira Nengsi, Irwan Effendi, Irvina Nurrachmi (Author) https://creativecommons.org/licenses/by/4.0
Comparison of the Abundance of Macrozoobenthos in Areas Affected and Unaffected by Reclamation in Pesisir Selatan District
This study aims to identify differences in macrozoobenthos abundance in areas affected and unaffected by reclamation around the Mandeh Tourism Area. This study was conducted in February–March 2023, using a survey method and sampling with the transect method. This study's results indicate that the water's condition in the Mandeh Tourism Area is still within the limits of the water quality standards and is quite good for the survival of macrozoobenthos. Macrozoobenthos found in Mandeh Tourism Area consisted of 12 families, namely Arcidae, Asterinidae, Cardiidae, Ellobiidae, Nassariidae, Neritidae, Potamididae, Siphonariidae, Trochidae, Turbinidae, Vanikoridae and Veneridae. A mixture of sand and gravel dominates the sediment type in the Mandeh Tourism Area. The total organic matter content of the sediments ranged from 3.65 to 3.90% (low). The density value of macrozoobenthos individuals in areas affected by reclamation is 5.89 ind/m2 with the highest relative density, Terebralia sulcata (26%), in areas unaffected by reclamation the average density of individuals is estimated at 10, 57 ind/m2 with abundance the highest relative is the type Pythia scarabaeus (23%).
Copyright (c) 2025 Marhamah Nurul Mufidah, Sofyan Husein Siregar, Afrizal Tanjung (Author) https://creativecommons.org/licenses/by/4.0
The Potential of Marine Bacteria in Plastic Biodegradation: A Review
Ocean plastic pollution has become a significant problem affecting ecosystems and human health. One promising approach to address this issue is biodegradation by marine microorganisms, particularly bacteria. This article reviews recent studies (2021–2024) exploring the ability of marine bacteria to degrade plastics. Based on the research, certain marine bacteria have been proven capable of producing enzymes effective in breaking down various plastics. The article also discusses the challenges and opportunities in developing biotechnology based on marine bacteria to tackle plastic pollution
Copyright (c) 2025 M Riswan, Ronal Kurniawan, Irwan Effendi, Mega Novia Putri (Author) https://creativecommons.org/licenses/by/4.0
Liquid Waste Management Techniques by Using Equipment Operation System and Ipal System in PT Pertamina Trans Continental Dumai, Riau
Managing liquid waste from the oil and gas industry is crucial to prevent water pollution. PT Pertamina Trans Kontinental Dumai is one of the companies active in oil and gas operations, which produces liquid waste from exploration and production processes. This study aims to determine the company's fluid waste management system and the readiness of oil spill response equipment. The methods include direct observation, interviews with relevant parties, and literature review. The observations indicate that wastewater treatment is carried out through three stages: physical separation, chemical treatment, and biological processes using aerated tanks and sedimentation. The quality test results show that parameters such as BOD, COD, oil and grease, ammonia, total phenol, pH, and temperature are within the established quality standards. Additionally, PT Pertamina Trans Kontinental Dumai has complete and well-maintained emergency response facilities for oil spills, including oil booms, oil skimmers, dispersants, and sorbents. In conclusion, the management of liquid waste and equipment readiness for oil spill response at PT Pertamina Trans Kontinental Dumai complies with standards, thereby minimizing the risk of marine environmental pollution.
Copyright (c) 2025 Aprilia Wulandari, Jacinda Qoidatun Shandy (Author) https://creativecommons.org/licenses/by/4.0
Mapping the Distribution of Sea Surface Temperature and Chlorophyll-a in the Waters of Pieh Island Conservation Area Using Aqua MODIS Satellite Imagery
Pieh Island Conservation Area is a conservation area that has abundant biodiversity, including coral reefs, turtles, whales, dolphins, and others. This study aims to determine the Mapping of Sea Surface Temperature Distribution and chlorophyll-A in the Pieh Island Conservation Area Waters Using AQUA MODIS Satellite Imagery. The methods used are active participation, literature study, and discussion with field supervisors in the Pieh Island Marine Conservation Area, West Sumatra Province. The results of the Thematic Internship Program MBKM with the title Mapping the Distribution of Sea Surface Temperature and Chlorophyll-A in the Waters of Pieh Island Conservation Area Using Aqua MODIS Satellite Imagery. Based on the graph, the average sea surface temperature and chlorophyll-a concentration in the Pieh Island Waters Conservation Area show that the highest sea surface temperature during 2023 is in February at 30 ° C, which continues to decrease to the lowest value in May. Then it increases again from June to August, respectively 27.5°C, 27°C, and 27.5°C, and then drops in September by 27.5°C. Furthermore, the chlorophyll-a concentration value has the lowest value in April with a value of 0.182 mg/m3and the highest peak is in August with a value of 0.362 mg/m3, The results of the correlation test between sea surface temperature and chlorophyll-a show a significance value of 0.152 which is greater than the general significance level of 0.05. Therefore, based on the statistical significance criterion, it cannot be ignored that there is no significant influence between the two variables. At the same time, however, the Pearson correlation value is -0.519, which reflects the negative relationship between sea surface temperature and chlorophyll-a.
Copyright (c) 2025 Natasya Debora Christiani Maatitawaer, Fharisa Nabila Rizvi, Fitri Kurniati (Author) https://creativecommons.org/licenses/by/4.0
Size Study of Sand Grain in the Aroen Meubanja Turtle Conservation Area, Aceh Jaya
Due to its unique coastal characteristics, the Aroen Meubanja Turtle Conservation Area in Aceh Jaya has significant potential as a nesting site for sea turtles. This study analysed the area's sand grain size and characteristics to determine its suitability for turtle nesting. The research was conducted in March 2024, with sand samples collected from three stations using purposive random sampling. Laboratory analysis included sieving and sand grain classification based on size and shape using the Wentworth and Powers classifications. The Wentworth scale is used to classify grain size, while the Powers scale assesses the shape and roundness of the grains. The results revealed that over 70% of the sediment in the area consists of very fine sand, which is highly favourable for turtle nesting. The roundness of the sand grains indicates a long transportation process, contributing to their suitability for nesting. Fine sand allows for proper water drainage, preventing waterlogging in nests and maintaining optimal temperatures for egg incubation. Additionally, environmental factors such as beach width, slope, substrate temperature, humidity, and coastal vegetation further enhance the area's potential as a turtle conservation site. This study concludes that the Aroen Meubanja coastal area meets the criteria for an ideal turtle nesting habitat. Recommendations include habitat management, community education, and further research to ensure sustainable conservation efforts
Copyright (c) 2025 Sri Wahyuni, Samsul Bahri, Hayatun Nufus, Asri Mursawal (Author) https://creativecommons.org/licenses/by/4.0
Relationship Between Total Suspended Solid (TSS) and Phytoplankton Abundance in the Waters of Rupat Strait, Riau Province
This study was conducted in March 2023 in the waters of the Rupat Strait, Riau Province. This study aimed to determine the total suspended solid (TSS) concentration, the type and abundance of phytoplankton, and the relationship between TSS concentration and phytoplankton in the Rupat Strait waters. The method used was a survey method; the location of the study was determined by purposive sampling; there were 4 sampling stations consisting of 3 sampling points. The results showed that the highest average TSS was at Station 4 (98.33 mg/L), and the lowest was at Station 1 (85 mg/L). There were 14 types of phytoplankton found, namely Nitzschia sp, Synedra ulna, Isthmia obliquita, Rhabdonema adriticum, Grammatophora sp, Guinardia striata, Rhizosolenia alata, Cyclotella atomus, Oscillatoria sp, Lyngbya sp, Tolypothrix sp, Pleurotaenium sp, Closterium sp, Gonatozygon sp with the most dominant species being Isthmia obliquata, Synedra ulna, Grammatophora sp. The highest abundance was in the Darul Aman area (5004.207 ind/L), and the lowest was in the Bandar Bakau area (2573.592 ind/l). The relationship between TSS and phytoplankton abundance shows a strong and negative relationship, meaning that the higher the TSS, the lower the abundance of phytoplankton in the waters of Rupat Strait.
Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
Marine Water Quality Mapping in Rupat Strait with Modelling Hydrodynamics
This research aims to analyze water quality and determine the status of quality standards in the waters of Rupat Strait. The method used in the study is comparative descriptive analysis and literature analysis. Hydrodynamic and water quality models with MIKE 21 Hydrodynamics and ECO Lab modules were used to examine the distribution of water quality parameters in the waters of Rupat Strait. The results showed that the waters of the Rupat Strait have a depth between 2-15 m with a velocity of 0.15-0.3 m/s. DO concentration has an interval of 5-6 mg/L, then BOD concentration has an interval of 0.8-2.4 mg/L, salinity has an interval of 17- 27‰, and temperature has an interval of 26-310C. Water quality in Rupat Strait is still within the quality standards. The pollution index calculation in Rupat Strait obtained values between 1<IP<5, indicating that Rupat Strait is still classified as lightly polluted
Gastropod Community Structure in the Coastal Waters of Lalang Village Siak Regency
Class Gastropods is the largest class of the Phylum Mollusca. Changes influence the gastropod community structure in terms of environmental factors. This study was conducted in the coastal waters of Lalang Village, Sungai Apit District, Siak Regency, in June 2022, aiming to determine the structure of the Gastropod community, which includes species, density, diversity, uniformity, dominance, and distribution pattern, and water quality. Sampling using the line transect method was carried out at four stations. The study found eight species of gastropods; the gastropod density values obtained at each research station were 3.57-4.84 ind/m2. The value of the gastropod diversity index (H') was categorized as medium, the gastropod uniformity index (E) was classified as high, and the dominance index value (C) indicated that there were no dominant species in the waters. The distribution pattern of gastropods between observation stations is clustered
Community Structure of Decapods in the Coastal Waters of Rupat Utara District
Decapods are one of the macrozoobenthos consisting of the Taxonomy of the last five pairs of the eight thoracic appendages. This study aimed to determine the structure of the decapod community in the waters of Rupat Utara District Beach, including abundance, diversity, uniformity, dominance index, distribution pattern, and community similarity index in Rupat Utara waters. The survey method was used in the study. Determination of observation stations was carried out purposively. The species found consisted of 8 (eight) species from Rupat Utara waters. The abundance of decapods was 1,326 ind/Ha. The diversity index value (H'= 1.48) is included in the medium category. The value of the uniformity index (E = 0.83) is included in the high category. The dominance index (C = 0.31) and similarity index of decapod community I to II is 83%, I to III 77%, and II to III 93%.
Diversity and Distribution Patterns of Gastropoda (Mollusca) in the Mangrove Area of Tiram Beach, Padang Pariaman Regency, West Sumatra Province
This study was conducted in March 2023 at Tiram Beach, Padang Pariaman Regency, West Sumatra Province. This study aims to determine the diversity and distribution patterns of gastropods in the mangrove area of Tiram Beach, Padang Pariaman Regency. The method used in this study was a survey method that involved direct observation of the study area, after which samples were analyzed in the laboratory. Gastropod sampling sites in the mangrove area were determined by targeted sampling consisting of 3 (three) stations at each station with three transects with 5 square plots of 1x1 m² spaced 10 m each. The results showed that the gastropod diversity in the Tiram Beach mangrove area was included in the low and medium categories. Gastropod distribution patterns at each station are categorized as clustered. Sediment organic matter in the Tiram Beach mangrove area achieved the highest average value of 4.52-22.13%. The sediment fraction at each station is silty sand and gravelly sand.
Catch Composition and Selectivity Drift Gillnet in Pambang Pesisir Village Bantan Subdistrict Bengkalis Regency
Gill nets are placed perpendicular to the water to block the swimming direction of the fish. Fish are caught by being entangled in the meshes or entangled (spun) in the body of the net. This research was conducted in Pambang Pesisir Village, Bantan District, Bengkalis Regency, to know the composition of the catch and the selectivity of drift gill nets, comparing the composition of the number, type, weight, and size of the catch from different mesh sizes, and knowing how to catch fish (entangled, gilled, snagged, wedged) on the same mesh used. This research was carried out in December 2020 using the experimental fishing method, which is a research method that uses samples of research objects caught on fishing gear for observation. The research results of drift gill nets are species-selective fishing gear. Moreover, drift gill nets with a mesh size of 7.62 cm are more selective than nets of 5.72 cm because they have a catch ratio value closer to 1 and catch more large fish (worth catching). How to catch fish with a mesh size of 5.72 cm, many fish were caught by snagged; namely, 65 fish (30%), wedged 61 fish (28%), gilled 59 fish (27%), and 33 fish entangled (15%). Meanwhile, for the mesh size of 7.62 cm, 30 fish (31%) were caught wedged, 27 fish (29%) snagged, 27 fish (29%) gilled, and ten fish entangled (11%).
Macrozoobenthos Community Structure at Teluk Marunggai Beach, Nagari Sungai Nyalo, Pesisir Selatan District, West Sumatera Province
Teluk Marunggai Beach, Nagari Sungai Nyalo, is one of the new tourist areas in Pesisir Selatan Regency which, over time, will begin to be in demand by tourists, which will have an impact on the life of the biota on the beach, one of which is macrozoobenthos. This research was conducted in March 2023 in the Intertidal Zone of Teluk Marunggai Beach, Sungai Nyalo Village, Koto Ampek Tarusan District, Pesisir Selatan Regency, West Sumatra Province. The purpose of this study was to determine the type and abundance of macrozoobenthos species in the coastal waters of Marunggai Bay and to determine the diversity, uniformity, dominance and distribution patterns of macrozoobenthos in the coastal waters of Marunggai Bay. The research method used is the survey method, where the sampling using the quadrant transect method is carried out at three stations. The research results found 40 species of macrozoobenthos. The most common species found at all stations were Turbo cinereus from the Turbinidae family and the Gastropod class. The macrozoobenthos abundance values ​​obtained ranged from 6.44–6.67 ind/m2. Species diversity index values ​​ranged from 3.06–3.52, namely high. Uniformity index values ​​ranged from 3.02 to 3.14, high uniformity, dominance index values ​​ranged from 0.10 to 0.15; no species dominated, and the value of the distribution pattern ranged from 2.959 to 2.962 with a group distribution pattern
Analysis of Upwelling Parameters when the El Nino Southern Oscillation (ENSO) Occurred in the Halmahera Sea
Upwelling events that occur in the Halmahera Sea are influenced by the El Nino Southern Oscillation (ENSO). Upwelling can cause sea surface temperatures to be lower than normal, affecting the potential of fishery resources in the region. The purpose of this study was to determine the conditions of sea surface temperature, chlorophyll-a content, salinity, and upwelling conditions when viewed from the parameters of chlorophyll-α content and sea surface temperature when El Nino was strong, El Nino was weak, La Nina was strong, and La Nina weak and in normal conditions in the Halmahera Sea region. The data used in this study include the Oceanic Nino Index, sea surface temperature, salinity, and chlorophyll-α content during the 2010–2019 period. A quantitative descriptive research type is used by filtering ENSO data to determine when ENSO occurred, then visualizing the data in each parameter and analyzing it. The results of this study show that upwelling is known to occur in the northern to western parts of the Halmahera Sea. When the El Nino phase is vital, the upwelling parameter changes, the sea surface temperature decreases to 27.1⁰C, the chlorophyll-α content increases to 0.70 mg/m3 compared to the normal phase, and the upwelling intensity changes.
The Identification of Upwelling in the Occurrence of Tropical Cyclone Charlotte in the Waters of Southern Java (Case Study: March 17-28, 2022)
Tropical cyclones are one of the meteorological phenomena that can have negative impacts on humans. These impacts can include heavy rainfall leading to floods and even storm surges. However, tropical cyclones can also have positive effects as they can trigger upwelling. Upwelling affects the fisheries aspect because in areas where upwelling occurs, sea surface temperatures are lower, and nutrients (such as phosphate and nitrate) are lifted from deeper layers of the ocean, which can affect the growth of phytoplankton. The objective of this research is to identify and analyze the upwelling phenomenon in the waters south of Java Island during the occurrence of Tropical Cyclone Charlotte. The data used in this research includes the intensity and movement direction of Tropical Cyclone Charlotte from the zoom.earth website and sea surface temperature, chlorophyll-a, mixed layer depth (MLD), and sea level anomaly data from the E.U. Copernicus Marine Service Information (CMEMS)-Global Monitoring and Forecasting Center during March 17-28, 2022. The results of this research indicate that upwelling was not identified during the period before or after the cyclone, as evidenced by sea surface temperatures between 28.5-29.5°C, chlorophyll-α concentration of <0.15 mg/m3, and a sea level rise of 0.1 m
Toxicity of Cadmium (Cd) on Artemia salina
Cd is a non-essential metal and a widespread micropollutant that has physiological effects on aquatic organisms. Cd heavy metal poisoning can be acutely caused by contamination at high doses, while chronic poisoning is generally caused by low levels of contamination and long exposure time. This research was conducted in June 2022 at the Marine Chemistry Laboratory Faculty of Fisheries and Marine, Universitas Riau, which aims to determine the value of LC50 (Lethal Concentration) for 24 hours after being given a toxicant in the form of Cd and to determine the level of Cd toxicity in A. salina. The method used in this research is the experimental method with the experimental unit A. salina. The LC50 of Cd on A. salina revealed 11.7109 mg/L. This concentration is capable of causing the death of 50% of the test animals. Furthermore, the water quality in the acute toxicity test, P0 (control), was classified as good to support the life of A. salina, while at P1 (3.13 mg/L) - P5 (50 mg/L), it was classified as polluted
Composition of Catch Results from Gombang Fishing Tools in Prapat Tunggal Village, Bengkalis District, Riau Province
One of the livelihoods of the people of Prapat Tunggal Village, Bengkalis Regency, Riau Province, is fishing. The fishing gear fishermen operate is longline, gombang, drier, and gill nets. The research was conducted in June to determine the composition of catches from gombang fishing gear in Prapat Tunggal Village. The method used is a survey method and descriptive analysis. From the results of this research, the number of catches from gombang fishing equipment was 153.77 kg or 433,290 fish. The dominant net is rebon shrimp, which is the main catch of 77.90% of the total weight of the trap and the bycatch catch of 20.92%, as well as the discard catch of 1.17%.
Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
The Atmospheric and Oceanic Processes on Thermal Front Variability over the Java Sea
The Java Sea is influenced by various atmospheric and oceanographic factors such as monsoon winds and the inflow of water from adjacent seas, thus leading to the formation of thermal fronts. In this research, the atmospheric process over the thermal front was estimated by using sea surface temperature (SST) gradient and crosswind-SST gradient calculation based on the GLORYS12V1 monthly SST data from Copernicus Marine Service (CMEMS) and the ERA5 monthly surface wind data from European Centre for Medium-Range Weather Forecasts (ECMWF) for 27 years (from 1993 to 2019). Moreover, the oceanic process was determined from the volume transports of three major channels surrounding the Java Sea, which are Karimata Strait, Sunda Strait, and the eastern boundary of the Java Sea. Based on the annual variance analysis, there are four main thermal front areas, such as Northern Java Coast (NJC), Eastern Sumatra Coast (ESC), Western Borneo Coast (WBC), and Eastern Borneo Coast (EBC). The annual variation of the thermal front over the ESC, WBC, and ESC has two peaks in March and October, while the NJC thermal front area has three peaks in March, July, and November. This study results that the thermal front activities over the NJC, WBC, and EBC are significantly correlated to the wind stress curl over those areas, with a coefficient correlation of about 0.62, -0.92, and -0.73, respectively. In addition, the increase in thermal front activity over the NJC area is controlled by negative wind stress curl with no lag time, while the WBC and EBC areas are controlled by positive wind stress curl with a lag time of 1 month (wind stress leads). On the other hand, the thermal front activity over the ESC area is closely related to southward volume transport from the Karimata Strait, with a correlation coefficient of -0.74 and a lag time of 2 months (volume transport leads).
Productivity and Financial Analysis of Fishing Effort with Handline at Kutaraja Oceanic Fishing Port Aceh Province
Production of catches on hand line fishing gear at Kutaraja Ocean Fishing Port has declined. This is seen from the level of fish production produced, which was 2.407.580 tons in 2018, compared to in 2019 which was 2.285.750 tons. The fishing business, which has become one of the livelihoods of the Indonesian people, is a little riskier than other businesses because the fish, which are the play target of this business, are constantly moving dynamically. The research objective was to determine productivity per GT, Trip, and ABK on hand line fishing gear and to determine the financial feasibility analysis of fishing effort on hand line fishing gears at Kutaraja Ocean Fishing Ports. The benefits of this research are to increase knowledge and insight regarding productivity and financial analysis of the fishing line effort. The method used in this study is a survey method. The data analysis method used in this research is descriptive. The results showed that the value of productivity per trip with large-size ships has a high amount of production compared to smaller ship sizes. Hand line fishing with a vessel size >30 GT has a relatively long payback period, <5 years. While ships with a height of 5 GT, 6 GT, 9 GT, 22 GT, and 24 GT have a payback period of <3 years
Fishery Harbor Needs Analysis for Fishery Vessel Activities in Ocean Bungus Fishery, West Sumatra Province
The size of the harbor pool will affect the number of ships that will dock. The purpose of this research is to determine the size of the port pool needs and determine the depth of the port pool needed for smooth activities at PPS Bungus. Data collection is done directly in the field to see the maximum number of ships anchored the port pool area (m2), the depth of the port pool (m), data on the width, length, and depth of the largest ship (m), the maximum tide in the port pool (m), and the squat or height of the oncoming ship (m). The results concluded that the existing harbor pool is no longer able to accommodate all ships that dock. The current harbor pool area is 40,000 m2 with 348 vessels, requiring a pool area of 458,762.06 m2. The current average harbor pool depth is 2.75 m, and it is safe for ships to anchor in the harbor pool
Effect of Mesh Size on Fishing Gear Gill Nets on the Catch in the Sub-District of Teluk Meranti, Pelalawan Regency
The size of the gill net in the waters of Pangkalan Terap Village is 2.5 inches, 3 inches, and 5 inches, but its use is still based on the current season. This study aims to determine the effect of gillnet mesh size on catches, determine the number, type, weight, and size of catches, and determine the size of gill nets that are effectively used to catch fish in Pangkalan Terap Village. This research was conducted in April - June 2022 in Pangkalan Terap Village, Teluk Meranti District, Pelalawan Regency, Riau Province. The method used in this research is an experimental fishing method with a Randomized Group Design. The results showed that the mesh size of 2.5 inches, 3 inches, and 5 inches in the rainy and dry seasons in Pangkalan Terap Village had a significant effect on the number and weight of fish caught (Fcount> FTable). The number of fish caught in the rainy season was 219 fish weighing 46259 g, while in the dry season, 241 fish weighing 79435g. The types of catches in all nets in both seasons were ten species dominated by Cyclocheillichthys sp. 2.5-inch gill nets are more effectively used because they get the most diverse catches compared to other nets
Facility Utilization Study Fish Landing Base Dumai Riau Province
This study aimed to analyze the utilization study of Dumai Fish Landing Base facilities in Riau Province. This research was conducted in March 2023 at the Fish Landing Base (PPI) in Dumai City, Riau Province. The methods used in the study were surveys and interviews. The results showed that the fishing gear used by fishermen at PPI Dumai were gillnet, longline, sondong, and kurau net. The high percentage of utilization of dock facilities is about 545,45% and the port pool area is 139,98%, which means that the port pool area has exceeded highly utilized, while the utilization rate of the port pool depth is 87,5%, which means that it can still be utilized more optimally by fishermen. The utilization rate of the PPI Dumai auction building facility is 72,98%, which means that the auction building has exceeded being highly utilized
Copyright (c) 2023 Ulva Uziel Hasiholan Limbong, Alit Hindri Yani, Jonny Zain (Author) https://creativecommons.org/licenses/by/4.0
Composition of Fishing Gear Pengerih at Day and Night in Meskom Village, Bengkalis District
Pengerih is one of the trapping gears used by fishermen in Meskom Village. The purpose of this study was to determine the composition of the catch of Pengerih including the type and weight of fish caught during the day and night. This research was conducted in September 2022 in Meskom Village, Bengkalis Regency. The method used in this research is the survey method. The analysis used is by calculating the level of main catch and bycatch using the formulation of Akiyama. Based on the results of the study, it was found that the catch of curler gear was 9 types with a total catch of 5.030 fish with a total weight of 51,08 kg. The dominant types of catch during the study were red shrimp (Parapenaeus longirostris) 1.272 fish weighing 10,64 kg, striped shrimp (Parapenaeopsis sculptilis) 1,158 fish weighing 9,71 kg, white shrimp (Panaeus merguiensis) 1,115 fish weighing 9,34 kg, thorn shrimp (Panulirus sp) 883 fish weighing 7,34 kg, Moustached thryssa (Engraulis mystax) 302 fish 3,84 kg. While the bycatch consisted of print shrimp (Harpiosquilla raphidea) 39 fish weighing 1,46 kg, Bombay duck (Harpodon nehereus) 75 fish weighing 5,42 kg, Panna croaker (Otolithoides microdon) 93 fish weighing 1,46 kg, Shorthead hairfin anchovy (Setipinna breviceps) 93 fish and weighing 1.87 kg. If you look at the results of the catch more tend to be a lot of catches at night 2.813 fish weigh 28.84 while during the day 2.217 fish weigh 22.24 kg
Copyright (c) 2023 Dian Agustin, Bustari Bustari, Alit Hindri Yani (Author) https://creativecommons.org/licenses/by/4.0
Identification of Diversity of Coral Fish Species in the Rumpon Area in Banyak Island District, Aceh Singkil Regency
This study aims to determine the diversity and abundance of reef fish around FADs in Balai Island Waters. This research was conducted in October - December 2022 in the waters of Balai Island, Aceh Singkil Regency. The method used is a Stationary Visual Census then identified using the reef fish identification guidebook. Based on the results of the study, 9 species of reef fish were identified, consisting of 6 species. The abundance of reef fish is 1.3 is included in the medium category, the diversity index is 1.676 medium category, uniformity is 0.935 abundance category, and dominance is 0.209 low category
Factors Affecting the Amount of Marine Supply on Sondong and Gillnet Ship at UPT Fishery Port of Riau Province
The purpose of this study was to determine the factor of the need for supplies at sea in sondong boats and gillnets and to prove how strong the relationship between these variables is. This research was conducted in January 2022 at the UPT Fisheries Port of Riau Province using the survey method. The results showed that the factors of ship size, length of time at sea, and engine power had a strong effect on the amount of fuel carried. Based on the F-test with a confidence level of 87.1%. According to the T-test, the length of time at sea has the greatest influence, while for the application of ice, the factors of length of time at sea and catch greatly affect the amount of ice in the T-test with a confidence level (coefficient of determination) of 46.7%. According to the T-test, the length of time at sea has the greatest effect on the ice supply on the sondong ship. In gill nets, boat sizes, length of time at sea, and engine power have a strong effect on the amount of fuel carried. Based on the F test with a confidence level of 91.5%. According to the T-test, the length of time at sea has the greatest effect. Whereas in the provision of ice in gill net vessels, the length of time at sea and the catch also greatly affect the amount of ice carried with a confidence level (coefficient of determination) of 88%. According to the T-test, the length of time at sea has the greatest effect on the supply of ice in gill net boats
Composition Analysis of Bubu Catches in the Napangga River, Tanjung Medan District, Rokan Hilir Regency
This study aims to determine the types of main catches and bycatch and to identify the dominant types and sizes of fish caught. This research was conducted from January to February 2023 in the waters of the Napangga River, Tanjung Medan Village, Tanjung Medan District, Rokan Hilir Regency. The method used in this study was a survey method by directly observing the catch of bubu and then identifying the type of fish, the number of individuals, and the weight of the fish. The results showed that the main catches were two types of fish, namely Kissing gourami (Helostoma temminckii) totaling 30 individuals, and Ompok hypophthalmus totaling 24 individuals. Bycatch caught were 8 types of fish with a total of 47 individuals