Marine Fisheries : Journal of Marine Fisheries Technology and Management
Not a member yet
314 research outputs found
Sort by
PERSEPSI NELAYAN LOKAL TERHADAP KEBERADAAN MIMI DI WILAYAH PESISIR BANYUASIN, SUMATERA SELATAN
Get PDFHorseshoe crabs (HSC) are marine arthropods, which are protected in Indonesia. Understanding fishermen\u27s perceptions of HSC\u27s existence was very important for the decision-making of conservation planning and management. This research aimed to analyze local fishermen\u27s perceptions toward HSC\u27s existence and the factors influencing their perceptions. Questionnaire-based interviews were conducted with 92 fishermen from the Banyuasin coast, from August to September 2023. Data were analyzed using descriptive statistics and multinomial logistic regression. The results revealed that most fishermen knew HSC and could distinguish their species. The survey of fishing practices showed that the vast majority of respondents operate one-day fishing with only few hours at sea (53.3%), conducting day time operation (69.6%), using 5-10 GT vessels (52.2 %), and deploying fishing gear at the sea bottom (85.9%). Based on fishermen\u27s perception scores toward HSC existence through six assessment aspects, the majority of their perceptions were in the moderate category (54%), followed by the low (28.7%) and high (16.2%) categories. In terms of the regression output, the results of the likelihood ratio test indicated that education, setting position of gear, fishing operation time, and village location were explanatory variables that significantly influenced fishermen\u27s perceptions.
Keywords: Ecological knowledge, Fishing practices, Multinomial logistic regression Protected specie
SUITABILITY OF SPATIAL-TEMPORAL HABITAT OF YELLOWFIN TUNA (Thunnus albacares) USING MAXIMUM ENTROPY MODEL IN WEST SUMATRA
Get PDFYellowfin tuna is one of the main catches in West Sumatera waters and has a high economic value. Fishing optimization can be improved through spatial and temporal predictions of fishing areas for effective fisheries management. This research aims to predict fishing areas using an oceanographic data approach through maximum entropy (MaxEnt) modelling. Data collection incorporating sea surface temperature and chlorophyll-a were obtained from the Aqua-Modis satellite in 2022 as well as fishing point data from Ocean Fishing Port (OFP) Bungus. The MaxEnt model shows a good level of accuracy in the West season (AUC 0,860), 1st Transitional season (AUC 0,918), East season (AUC 0,918), and 2nd Transitional season (0,920) The contribution of chlorophyll for one year is more significant, accounted for 75,3%, compared to sea surface temperature, constituted 24,7%. The Sea Surface Temperature (SST) values in West Sumatera waters vary on each season, ranging from 26,4 to 34.5 ℃ and the chlorophyll-a fluctuate between 0,03 and 5,45 mg/m3. The distribution of yellowfin tuna habitat on the map shows that most fishing vessel coordinates are in the Habitat Suitability Index (HSI) HSI value of 0,6 – 0,9. Potential areas for catching yellowfin tuna are around the Mentawai Islands.
Keywords: Chlorophyll-a, HSI, Maximum Entropy Model, Sea Surface Temperature, Yellowfin Tun
ECONOMIC STUDY OF BLUE SWIMMING CRAB FISHING ACTIVITIES IN JAVA SEA USING ELECTRIC AND SAILING BOAT DESIGN
Get PDFThe United Nations has proclaimed the world\u27s commitment to reducing greenhouse gas emissions in the Paris Agreement, and Indonesia has a net zero emissions target by 2060. One of the efforts to support this commitment is by applying environmentally friendly fishing vessel technology using sail and electric propulsion. However, to convince the application, it is necessary to consider several aspects, especially the economic aspect of business investment. This study aims to calculate the estimated cost of boatbuilding and fishing operations for 10 days in the Java Sea using the development of electric sailboat design. The payback period of a feasible investment is then calculated by comparing the revenue from Blue Swimming Crab (BSC) fishing activities. Based on the result, recognizing that with an investment value of nearly 400 thousand USD to purchase the boat, it is reasonable to set a minimum goal of capturing at least 1,2 Ton of crabs per trip, and a minimum of 20 trips annually, thus the payback period takes 10 years.
Keywords: Blue swimming crab, Fishing vessel, Java Sea, Net zero emission, Payback period
STATUS PEMANFAATAN IKAN KAKAP (Lutjanus spp.) BERBASIS DATA PANJANG IKAN DI PERAIRAN TAMAN NASIONAL TAKA BONERATE: Length Based Stock Assessment of Snappers (Lutjanus spp.) in Taka Bonerate National Park Waters
Get PDFSnappers (Lutjanus spp.) are the most common reef fish caught in Taka Bonerate National Park due to its high economic value and primarily targeted species. Without proper management measures, intensive fishing activities might result in unsustainable fish stocks. Therefore, in order to maintain sustainable utilization, it is important to understand the stock status of snapper fisheries. This study aimed to analyze the snappers\u27 stock status in Taka Bonerate National Park\u27s waters. Data were collected from January to December 2022 at three small-scale fisheries landing sites. The results showed that snappers are classified as slow-growing species with growth rates for species L. bohar, L. quinquelineatus, L. gibbus respectively 0,12, 0,39, and 0,35 per year to reach their respective asymptotic lengths of 83,41 cm, 29,5 cm, and 46,80 cm. The stock status of L. gibbus and L. bohar were indicated at overfished status where the exploitation rate (E) was > 0.5 and the SPR was < 0.3, hence a proper management measures is required. Furthermore, the species of L. quinquelineatus has a value of E is 0.5 and SPR is at 0.3, indicating that the utilization level of this species was at an optimal level.
Keywords: Snapper, Taka Bonerate, Fisheries Management
EFFECTIVENESS OF THE OIL TO GAS FUEL CONVERSION PROGRAM FOR FISHERMEN IN PALEMBANG CITY
Get PDFThe Oil to Gas Fuel Conversion Program aims to make it easier for fishermen to obtain fuel at affordable prices, hence they can increase their income. Program implementation is declared effective if it runs smoothly and produces the expected results. This research aims to analyze the effectiveness of the program, analyze the income of program recipients and non-program recipients, and analyze the relationship between program effectiveness and income. Interviews using questionnaires were conducted with research subjects, namely 51 members of the Joint Business Group who received the program and 30 members who did not receive the program. Data in the form of attitudes or opinions of program recipient respondents are analyzed based on the achievement of effectiveness scores, income data from two groups of respondents were analyzed based on the difference between two means tests, and the relationship between effectiveness and income was analyzed based on the Spearman rank correlation test. The research results showed that the program\u27s effectiveness was 94.20% (very high). The t-count value of 4.816 is greater than the t-table of 1.994, indicating that there is a significant difference between the income of program recipients and non-program recipients. The relationship between program effectiveness and income is very weak and not significant, with a coefficient value of 0.032. The effectiveness of the program does not directly affect income, but the existence of the program increases fishing efforts and the income of program recipients.
Keywords: Conversion; effectiveness; fishermen; gas fuel; Spearman Rank Correlation Tes
TUNA FISHERIES IN NORTH SULAWESI: PORTRAIT OF FRESH TUNA DIRECT EXPORT
Get PDFThe North Sulawesi Regional Government implemented a policy breakthrough to enhance the competitiveness of tuna fisheries by facilitating the direct export of fresh tuna from Manado to Japan. However, export operations have not run optimally, as the cargo quota of 20 tons per trip per week has not been achieved which threatens the continuation of the operation. This study aims to describe the current state of direct export of tuna to Japan and to identify the causes of the failure to meet the cargo quota target for direct export of fresh tuna to Japan. The data used in this study were obtained through in-depth interviews with respondents selected using purposive and accidental sampling, as well as direct observation at the research location. The data were processed qualitatively and quantitatively, and then analyzed descriptively. The results of the study revealed a reduction in the export quota from 20 tons per trip per week to 3 tons per trip per week. In 2023, the export reached the average delivery target was only met in three months: March, April, and December, with 3.35 tons, 3.04 tons, and 7.34 tons, respectively. The cause of the issue is the shortage of high-quality tuna raw materials (grade A), which results from fishermen failing to implement proper fish handling methods during fishing operations. Furthermore, the dependence on tuna supplies from PPS Bitung. The solution is to enhance the ability of fishermen according to good fish-handling standards and to diversify the supply chain of fresh tuna by sourcing from both within and outside the North Sulawesi region.
Keywords: direct export, fresh tuna, North Sulawes
KAPASITAS PERIKANAN CANTRANG DI PELABUHAN PERIKANAN PANTAI TEGALSARI KOTA TEGAL PROVINSI JAWA TENGAH PADA PENGELOLAAN PERIKANAN DEMERSAL
Get PDFDemersal fish resources are one of the main commodities in the waters of the Java Sea. Tegalsari coastal fishing port is one of the fish landing locations around the Java Sea where most of the demersal commodities landed at the port were caught by cantrang fishing gear. Generally, every fishing activity expects ideal catches by using an efficient input. Technical efficiency can be used as an indicator of performance measurement of fishing gear. This study aimed to determine the fishing capacity of cantrang fisheries in Tegalsari fishing port. The fishing capacity analysis was carried out using fish landing data from PPP Tegalsari from 2008 to 2019. The measurement of technical efficiency by using the DEA (Data Envelopment Analysis) approach. The result showed that fishing capacity in 2013, 2015, 2017, 2018, and 2019 have to be maintained because it is in a fully utilized, and the rest of them were overcapacity caused by an excess capacity of the value of fishing gear and number of efforts.
Keywords: Data Envelopment Analysis, Decision Making Unit, fish resources, fishing efficiency, Java Sea-Indonesi
STRATEGI PENCEGAHAN POTENSI PELANGGARAN ARMADA PENANGKAPAN IKAN STUDI KASUS PPS NIZAM ZACHMAN JAKARTA: Prevent Potential Violations Strategy of Fishing Vessel Case Study in PPS Nizam Zachman Jakarta
Get PDFBefore fishing surveillance is one of the important surveillances at fishing ports. A case study at PPS Nizam Zachman Jakarta (PPSNZJ) stated that 22.75% of purse seiners use fishing gear and equipment following did not comply with fishing business license (SLO). This research aims to identify potential violations of fishing vessels at before fishing stage after the SLO was issued and the factors that cause these violations to produce a conceptual model for preventing potential violations of fishing fleets. Primary data were collected using open interview. The secondary data were collected from annual report of the Pangkalan PSDKP Jakarta and PPSNZJ fishing port, and previous studies. This research was approached using 4 stages of a soft system methodology (SSM) approach namely identifying unstructured problems, structuring problems, formulating root definitions, and formulating conceptual models. The results of research show that there are six problems in activities before fishing after the SLO was issued. Based on the SSM approach, issuing supervisory regulations after the SLO was required to prevent illegal addition of fishing gear and fishing equipment. This is due to the absence of supervision after the SLO was issued by fisheries inspectors.
Keywords: fishing surveillance, fisheries violation, SSM, strategy, PPSNZ
BIOECONOMIC ANALYSIS OF RED SNAPPER (Lutjanus sp.) RESOURCES AT REMBANG REGENCY
No full textRembang Regency has quite large fishery potential in 2021, reaching 87,292.9 tonnes in Central Java. One of the catches with high economic value is red snapper (Lutjanus sp.). Red Snapper is a demersal fish obtained from the operation of Danish seine. The purpose of this study was to analyze the condition of red snapper resources in Rembang Regency using the bioeconomic approach of the Gordon-Schaefer model and to analyze the level of utilization and exploitation of red snapper (Lutjanus sp.) in Rembang Regency. The research used a descriptive method with a purposive sampling method to collect a sample of 90 respondents who owned Danish Seine gear at Tasikagung Fishing Port. The results of data processing obtained Maximum Sustainable Yield (MSY) with a CMSY value of 2,002 tons/year, EMSY of 8,857 trips/year. The Maximum Economic Yield (MEY) calculation obtained a CMEY value of 1,936 tons/year, EMEY of 7,241 trips/year, and optimal profit of IDR 74,773,571,716 and the calculation of the Open Access Equilibrium (OAE) where a COAE value of 1,194 tonnes/year is obtained, an EOAE of 14,483 trips/year. The permissible utilization rate of red snapper (Lutjanus sp.) in Rembang Regency is 3,670,532 kg/year. In the last 9 years, an average resource utilization rate of 45% was obtained and an average effort level of 158%. This level of effort has exceeded the fishing limit, so it is necessary to reduce or limit fishing efforts.
Keywords: MSY; MEY; Rembang Regency; Red Snapper; Gordon Schaefe
SPATIAL-TEMPORAL DISTRIBUTION OF NARROW-BARRED SPANISH MACKEREL (Scomberomorus commerson) FISHING GROUNDS IN RIAU ARCHIPELAGO WATERS, INDONESIA
No full textNarrow-barred Spanish mackerel (Scomberomorus commerson) is an exportable fish captured by gillnet fishing fleets from Bintan Regency. The fleets are operated in the Riau Archipelago waters but information on their activities is limited. Such information is important to the institution the Agency for Marine and Fisheries Affairs of Archipelagic Riau Province for ensuring the sustainability of the fisheries from both economic and biological perspectives. This study aims to determine the spatial-temporal distributions of the mackerel fishing grounds along the year with reference to the capture data, sea surface temperatures, chlorophyll-a concentrations, and salinities in the last 4 months of 2022. This study analyzed data from a fish export company, the PSDKP office at Tanjungpinang, Bintan, interviews of fishers affiliated with 44 fishing boat samples, and satellite-based marine data. Analysis on the monthly fishing productivity and optimum marine conditions for the mackerels were carried out to determine prospects of five recognized fishing grounds. Besides Lingga Islands, the fishing grounds are highly prospective from August to November. The longest fishing seasons are expected around Bangka Island (11 months). The spatial and temporal patterns show that the north-south-north shifts in fishing grounds that are associated with regional climates, i.e., monsoon winds