간행물
수산해양기술연구 KCI 등재 Journal of the Korean Society of Fisheries and Ocean Technology 韓國漁業技術學會誌
- 발행기관 한국수산해양기술학회(구 한국어업기술학회)
- 자료유형 학술지
- 간기 계간
- ISSN 2671-9940 (Print)2671-9924 (Online)
- 수록기간 1965 ~ 2025
- 주제분류 농수해양 > 수산학 농수해양 분류의 다른 간행물
- 십진분류KDC 529DDC 639
권호리스트/논문검색
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61권 3호 (2025년 8월) 11건
1.
2025.08
구독 인증기관 무료, 개인회원 유료
This study investigates the effects of canopy fabric material and vent diameter on the deployment performance of sea anchors for fishing operations through field experiments. Three canopy configurations were tested: polyamide (PA), polyester (PES), and a PA – PES alternating combination. Vent diameters of 80 cm and 40 cm were applied to each fabric as controlled structural factors. Deployment performance was evaluated from entrance diameter computed using four evenly spaced water level loggers, and maximum towing tension was recorded with a load cell. Key findings were discovered as follows: PES and the PA – PES mix achieved deployment diameter/ratio and maximum tension comparable to the current PA standard, indicating practical substitutability. PES also exhibited superior stability, showing reduced variability even with the smaller vent (a change in standard deviation ΔSD-1.75 cm). The mixed canopy maintained performance similar to PA. As expected, vent diameter systematically affected geometry and load (80 cm: 187 – 198 kgf vs. 40 cm: 249 – 268 kgf), underscoring the need to pair material selection with appropriate vent sizing. In conclusion, PES and mixed fabrics are viable alternatives to PA, and co-optimization of fabric choice and vent diameter can enhance sea-anchor performance, durability, and operational reliability for fishing operations.
4,000원
2.
2025.08
구독 인증기관 무료, 개인회원 유료
This study quantitatively evaluated the ghost fishing effects caused by lost gillnets and pots through abandoned fishing gear retrieval surveys conducted along the east and south coasts of Korea. The catch efficiency of retrieved gear was compared with commercial gear, and Monte Carlo simulations were employed to estimate ghost fishing rates over time. The results showed that the ghost fishing rate of snow crab gillnets and spring-type whelk pots retrieved from the East Sea were 50.7% and 57.9%, respectively while the drum-type octopus pots from the South Sea showed a ghost fishing rate of 48.3%. These findings indicate that lost fishing gear retains more than half the catch efficiency of commercial gear, and the impacts of ghost fishing can persist over extended periods. Simulation results revealed a sharp decline in ghost fishing rates within the first three months of submersion, followed by a gradual decrease, confirming the long-term impact of ghost gear. When applying time-weighted ghost fishing rates based on soak duration, the estimated loss in 2023 from ghost fishing in gillnet and pot fisheries amounted to approximately KRW 419.9 billion, representing 9.62% of the total production value of coastal and offshore fisheries. These findings emphasize the need for mandatory use of biodegradable gear, regular seabed gear monitoring, and the implementation of traceability and gear identification systems. The study provides scientific evidence for the development of policies and technical standards aimed at mitigating ghost fishing.
4,000원
3.
2025.08
구독 인증기관 무료, 개인회원 유료
This study examined the operational characteristics and fishing performance of an offshore pot fishery targeting swimming crabs (Portunus trituberculatus) to identify key issues and proposed strategies for improving efficiency and fisher safety. Analysis was based on approximately one year of fishing logbook data recorded by a pot fishing vessel. The total annual catch amounted to 30,084 kg, with the highest catch per unit effort of 0.07 kg per trap observed in autumn at depths of 20–25 m. No crabs were caught below 15℃ while the peak catch occurred at around 25℃. Catches were geographically concentrated in the mid-northern West Sea, especially near Taean and Boryeong. Economically important bycatch species, including sand crabs, octopus, and turban snails, exhibited distinct spatial distributions. An average of 1,996 traps were deployed per operation with a low loss rate of 1.6 traps. Based on field-level observations, this study proposed the development of automated or semi-automated equipment, such as bait cutters, automatic mainline arranging devices, pot-hauling and separation systems, chilled water tanks for sorting, and automated unloading systems. These technologies are expected to reduce labor demands, improve safety, and enhance the overall operational efficiency of the pot fishery.
4,300원
4.
2025.08
구독 인증기관 무료, 개인회원 유료
This study aimed to improve safety and reduce labor intensity in offshore crab pot fisheries through the development of six types of automated fishing gear: a bait cutter, bait crusher, mainline arranging device, automatic pot hauler, cold water tank system, and crab pot unloading device. Sea trials demonstrated that both the bait cutter and bait crusher effectively reduced overall operation time. The mainline arranging device lowered the risk of injury compared to the conventional manual handling. The automatic pot hauler enabled the automated separation of crab pots, significantly decreasing the physical workload. The cold water tank system facilitated the efficient sorting of live crabs while enhancing onboard safety. Additionally, the crab pot unloading device reduced physical strain on workers and minimized catch damage. A satisfaction survey revealed high levels of approval among fishers, particularly regarding labor reduction and improved safety. Economic analysis indicated that vessels equipped with the automated gear experienced reduced overall operating costs. These findings suggest that the developed technologies will contribute to the long-term sustainability and modernization of offshore crab pot fisheries.
4,200원
5.
2025.08
구독 인증기관 무료, 개인회원 유료
Understanding long-term changes in fisheries resources is essential for sustainable ecosystem-based management. This study assessed the quantitative and qualitative changes in Korean coastal fisheries from 1971 to 2024 using an ecological group-based approach. Catch data for approximately 130 species were grouped into 21 ecological groups, and the CMSY model was applied to estimate historical biomass and stock status. Future catch and biomass were projected to 2050 under a conservative scenario assuming reduced resilience. Biodiversity and ecosystem structure were evaluated using mean trophic level (MTL), diversity index (DI), and pelagic/demersal fish ratio (P/D) based on both catch and biomass. Historical total catch and biomass declined substantially while future projections suggest stabilization or modest recovery. The proportion of demersal fish decreased over time and is expected to remain low. MTL showed a gradual downward trend in both catch- and biomass-based indicators. DI showed similar fluctuating trends across both datasets. Although P/D values differed in magnitude, both indicators exhibited a consistent pattern of increase followed by decline, indicating ecosystem structural shifts.
4,500원
6.
2025.08
구독 인증기관 무료, 개인회원 유료
Passive acoustic monitoring (PAM) has emerged as an effective tool for studying underwater soundscapes and monitoring marine organisms. In this study, the biological sounds of three fish species that mainly inhabit or occur in the Korean coastal oceans, brown croaker (Miichthys miiuy), Pacific cod (Gadus macrocephalus), and small yellow croaker (Larimichthys polyactis) were recorded using the PAM method. The possibility of automatic classification was evaluated using a deep learning-based convolutional neural network (CNN) model based on the measured data. The biological fish sounds were recorded using hydrophones in the sea cage environments. The three fish species data were converted into spectrogram images and used as input for training and evaluating the CNN model. Gaussian noise was added to the test data to simulate low signal-to-noise ratio (SNR) environments. The model achieved high classification performance, with F1-score of about 96% on raw data and about 77% accuracy under signal-to-noise ratio conditions. These results suggest that CNN-based models be adequate for fish sound classification, even in acoustically complex underwater environments. Applying CNN models to classify and detect fish sounds can improve the automation and efficiency of PAM-based acoustic analysis, thereby improving the monitoring of fish populations, resource assessment, and ecological management in the future.
4,000원
7.
2025.08
구독 인증기관 무료, 개인회원 유료
This study determined the appropriate pressure for high pressure shucking of oysters (Magallana gigas) according to size categories. One-year and two-year-old oysters harvested from Yeosu and Tongyeong coastal areas were subjected to high pressure treatments with pressure ranging from 180 to 240 MPa and holding times of 0 to 420 seconds. Results demonstrated that 100% shucking rates were achieved at 220 MPa with 120-180 seconds holding time regardless of harvest time and production area. K-means cluster analysis was used to classify oyster specimens into small, medium, and large size groups with mean shell heights of 69.0 mm, 86.6 mm, and 106.7 mm, respectively. The analysis revealed that shucking efficiency improved directly proportional to oyster size. However, the appropriate shucking pressures converged at approximately 220 MPa for all size groups, with small, medium, and large groups showing 218.9 MPa, 221.7 MPa, and 220.6 MPa, respectively, and no significant differences among groups. These findings suggest that the appropriate pressure for high pressure shucking processes be approximately 220 MPa regardless of harvest time and production area, providing foundational data for potential automation of oyster shucking processes.
4,000원
8.
2025.08
구독 인증기관 무료, 개인회원 유료
This study aims to analyze the risk factors contributing to marine accidents involving Korean distant water fishing vessels using a Bayesian network approach. As marine accidents in this sector often result in severe casualties and significant economic losses, understanding their underlying causes is critical. Based on official investigation records from the Korea Maritime Safety Tribunal (2000-2023), a dataset of 46 accident cases involving longliners, trawlers, and other fishing vessels was constructed. The analysis categorized accidents by vessel types, gross tonnage, vessel age, location, operating status, and specific causes, including poor lookout and inadequate maintenance. Following the Formal Safety Assessment (FSA) framework recommended by the International Maritime Organization (IMO), the study applied Bayesian networks to quantify the probabilistic relationships among risk factors. The results revealed that the most hazardous conditions for different accident types included: vessels with 300-500 GT, aged 20-40 years, operating outside harbor limits during navigation or fishing. Specifically, collision and grounding incidents were primarily associated with poor lookout, while sinking and fire/explosion incidents were linked to inadequate maintenance. The findings underscore the necessity of tailored safety control measures for each accident type and vessel category. This research provides empirical evidence to support decision-making for improving safety policies under the Act on the Punishment of Serious Accidents and the Distant Water Fisheries Development Act.
5,100원
9.
2025.08
구독 인증기관 무료, 개인회원 유료
The purpose of this study is to assess the current status of technology development and evaluate future potential by analyzing patent trends in Korea’s fisheries sector. To this end, we examined patent application and registration trends over a 20-year period (2002-2021) within the fisheries domain across the Intellectual Property 5 (IP5) countries (Korea, China, Japan, the United States, and Europe), using data from the Korean Multifunctional Patent Search System (KOMPASS). Based on this analysis, we discussed the strategic direction and marketability of technology development in Korea. Patent applications and registrations in Korea’s fisheries sector have steadily increased over the past 20 years, placing Korea the second among the IP5 countries. Analysis of priority examination data indicates a continuous rise in new technology development, particularly in the aquaculture and seafood. However, multiple-International Patent Classification (IPC) applications are heavily concentrated among a small number of institutions, highlighting the need to broaden the applicant base to encourage more widespread technological innovation. Korea’s fisheries technology sector is currently in the growth stage with sustained development expected in aquaculture and seafood-related technologies. Although Korea entered the IP5 landscape relatively late, it possesses strong competitiveness and considerable development potential positioning it to assume a leading role in the global technology market.
4,200원
10.
2025.08
구독 인증기관 무료, 개인회원 유료
This study aims to evaluate the effects of installing electrodeless induction lamps on the intact stability of a coastal angling fishing vessel. The objective is to assess whether these alternative lighting systems can improve or maintain vessel stability while offering enhanced energy efficiency compared to conventional metal halide lamps. To achieve this, an 8.55-ton class coastal fishing vessel was selected, and hydrostatic analyses were conducted based on three kinds of lighting configurations: (1) metal halide lamps, (2) electrodeless induction lamps, and (3) a combined system of both. Inclining tests were performed for each condition, and the results were evaluated in accordance with the Standards for Stability and Full Load Waterline of Fishing Vessels and the Safety Standards for Standard Fishing Vessel Types established by the Korean Ministry of Oceans and Fisheries and the Adoption of the international code on intact stability by the International Maritime Organization. The core variables analyzed include the metacentric height (GM), righting lever curves, maximum righting moment and heel angle at maximum moment. These variables were used to assess the intact stability of the vessel under each lighting configuration. Inclination tests and hydrostatic analyses were performed using K-Ship and confirmed that the fishing vessel met all MOF and IMO stability criteria under various loading conditions and lamp configurations. Even when both metal halide and induction lamps were installed, the vessel satisfied the most stringent stability requirements with only a slight reduction in initial metacentric height. These results indicate that replacing or supplementing traditional lamps with induction lamps does not compromise vessel stability.
4,000원
11.
2025.08
구독 인증기관 무료, 개인회원 유료
This study presents energy-saving performance analysis of a recirculating aquaculture system (RAS) that uses seawater-source heat pumps to control the seawater temperature in the breeding tank. The analysis is based on artificial neural network (ANN) and TRNSYS-based digital twin simulations. The complex thermal load of the RAS, which fluctuates in real time due to changing environmental conditions, is simulated using the dynamic simulation software, TRNSYS. A fuzzy logic controller (FLC) was designed based on the dynamic heat load calculated by TRNSYS and the water temperature data of the breeding tank enabling capacity control of the inverter manipulator of the heat pump. At this stage, energy is saved through the control of the variable speed compressor responding to the partial load via the inverter. Power consumption was predicted at appropriate time intervals using a custom-built ANN model. The prediction results are used to determine the optimal number of heat pumps to operate. Through the digital twin simulation, the proposed heat pump capacity control is compared with conventional operating number control in terms of temperature regulation performance and power consumption. The results demonstrated that the proposed method can be easily implemented in Matlab and significantly improves energy efficiency in RAS farms.
4,500원
