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 ~ 2026
- 주제분류 농수해양 > 수산학 농수해양 분류의 다른 간행물
- 십진분류KDC 529DDC 639
권호리스트/논문검색
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62권 2호 (2026년 5월) 10건
1.
2026.05
구독 인증기관 무료, 개인회원 유료
This study quantitatively evaluated the durability of fishing gear marking systems and examined the effects of marking type, exposure time, and environmental conditions. Five types of buoys and three types of eel traps were used and attached (PP), adhesive (PP, PET), and insert-type (PP) markers were applied to buoys while rivet-type (PP) and hole cap-type (PP, POM) markers were applied to eel traps. Long-term exposure experiments were conducted under seawater immersion and outdoor exposure conditions. Durability was evaluated using a durability index calculated based on marking loss rate and information recognition rate. No significant differences in durability index were observed among buoy markers according to marking type or environmental condition whereas rivet-type (PP) markers applied to eel traps exhibited the highest durability index across all conditions. However, no significant differences in durability index were observed according to marking type or environmental condition; this indicates that the influence of environmental conditions was limited. In contrast, eel trap markers showed significant effects of marking type and environmental condition on durability index with a significant interaction between exposure time and environmental condition. Rivet-type (PP) markers exhibited the highest durability across all conditions indicating the most stable performance while hole cap markers showed differences depending on material. These findings are expected to provide fundamental data for future fisheries management policies.
4,000원
2.
2026.05
구독 인증기관 무료, 개인회원 유료
This study evaluated the sensory characteristics of Pacific oysters, Magallana gigas shucked by high-pressure processing under various pressure – holding time conditions. Oysters harvested from Tongyeong and Yeosu aquaculture areas were subjected to seven high pressure processing (HPP) treatments consisting of combinations of 200, 220, and 240 MPa with holding times of 0, 60, 120, 180, 300, 420 and 600 seconds, using seawater as the pressure-transmitting medium. Manually shucked raw oysters were included as the control group. Sensory attributes, including color, shape, odor, salty taste, fishy taste, texture, and overall preference, were assessed by a trained sensory panel using a seven-point sensory scale. The results demonstrated that increases in pressure level and holding time generally led to a decline in several sensory quality parameters. In particular, treatments at 240 MPa or extended holding times resulted in decreased scores for color uniformity, odor acceptability, and texture firmness compared with the control. Conversely, oysters treated at 200 – 220 MPa with holding times up to 180 seconds showed sensory qualities comparable to manually shucked raw oysters. Among all conditions, treatment at 220 MPa for 180 seconds was considered an appropriate condition for maintaining sensory quality during high-pressure oyster shucking. Overall, these findings indicate that excessive HPP conditions may deteriorate the sensory properties of raw oysters whereas optimized moderate processing parameters can yield shucked oysters with sensory qualities comparable to manually processed products. This provides a scientific basis for determining appropriate industrial HPP conditions for oyster shucking applications.
4,000원
3.
2026.05
구독 인증기관 무료, 개인회원 유료
This study evaluated the effects of high-pressure shucking on the compositional quality and microbiological characteristics of raw oysters (Magallana gigas) in comparison with conventional hand shucking, and examined heavy metal contents in the pressure-transmitting seawater used during processing. Oysters collected from Tongyeong and Yeosu were treated at 200-240 MPa for 0-600 seconds. One-way ANOVA showed significant differences among treatment groups in moisture, crude fat, and crude protein contents whereas Dunnett’s test indicated that most high-pressure-treated oysters were not significantly different from hand-shucked controls. Initial total viable counts ranged from 2.77 to 3.46 log CFU/g and increased to 7.95-9.23 log CFU/g after 14 days of storage, generally remaining similar to or lower than the control. Coliform counts decreased under several pressure-time conditions, and Escherichia coli and Vibrio parahaemolyticus were not detected. Although Cu, Zn, Ni, and Fe increased in the process seawater, Cd and Hg were not detected.
4,000원
4.
2026.05
구독 인증기관 무료, 개인회원 유료
This study investigated context-dependent characteristics of vocalizations in captive bottlenose dolphins (Tursiops truncatus) under different behavioral situations in Korea. The experiment was conducted on July 21, 2025, at the Whale Ecology Experience Center in Ulsan, Korea, involving four captive bottlenose dolphins housed together in a single tank. Four experimental conditions were established: (1) a normal condition without external disturbance, (2) a feeding condition in which a trainer threw food into the tank, (3) a training condition involving responses to trainer signals, and (4) a toy-provided condition. Dolphin vocalizations were recorded for a total of 90 minutes using an Aquafeeler IV A and AQH-200D hydrophone (10 Hz-200 kHz, sensitivity -220 dB re 1 V/μPa) while behavioral data were simultaneously collected using tank monitoring cameras. Acoustic analyses were conducted using PAMGuard software. A total of 197 whistles and 378 buzzes and burst-pulses were recorded during the experiment. In the normal condition, dolphins swam freely and predominantly produced whistles within a frequency range of 6.81-23.82 kHz. During the feeding condition, the production of whistles, buzzes, and burst-pulses decreased while click trains associated with food searching behavior were mainly observed, typically lasting 0.9-1.8 seconds. In the training condition, dolphins primarily produced buzzes and burst-pulses, often accompanied by low-frequency tonal components (1.55 – 8.13 kHz) in response to trainer signals. In the toy-provided condition, dolphins produced clicks associated with object exploration along with buzzes and burst-pulses ranging from 1.3 to 10.8 kHz. Whistles were most frequently recorded in the normal condition accounting for 72.5% of total whistle occurrences whereas buzzes and burst-pulses were most frequent in the toy-provided condition (51.1%). These results demonstrate that bottlenose dolphin vocalizations vary systematically according to behavioral context, suggesting that vocalization frequency and patterns should be useful indicators for inferring behavioral states and have potential applications in passive acoustic monitoring and biological monitoring technologies.
4,300원
5.
2026.05
구독 인증기관 무료, 개인회원 유료
As ocean warming and environmental variability increasingly affect marine ecosystems, systematic acoustic monitoring is essential for understanding changes in fisheries resources. This study introduces the acoustic survey system installed onboard the R/V Chambada and evaluates its applicability through a preliminary survey conducted in the coastal waters near Yokjido, Tongyeong, Korea. The vessel is equipped with a scientific echosounder, multibeam echosounder, acoustic doppler current profiler, conductivity-temperature-depth profiler, and other oceanographic instruments, enabling integrated acoustic and environmental observations. A pilot acoustic survey was conducted along four transects using the EK80 operating in both narrowband and wideband modes. Acoustic backscatter was analyzed to examine the vertical and spatial distributions of marine organisms along the survey tracks. In addition, WASSP multibeam data were visualized to evaluate their potential for interpreting the spatial structure of scatterers and seabed topography. The results demonstrate that the R/V Chambada can serve as an effective platform for routine acoustic monitoring. Future surveys integrating acoustic measurements, environmental observations, and biological sampling are expected to provide important baseline data for understanding long-term changes in coastal marine ecosystems and fisheries resources.
4,500원
6.
2026.05
구독 인증기관 무료, 개인회원 유료
To evaluate the feasibility of incorporating pelagic shrimp beam net gear and fishing methods targeting shiba shrimp, Metapenaeus joyneri, which migrate to surface waters at night, into the current fisheries management framework, scientific fishing experiments and commercial trial fishing operations were conducted in the coastal waters of Gochang-gun, Jeollabuk-do, Korea, from May to September 2025. Data obtained from the trial fishery were used to assess bycatch species composition, estimate stock abundance, and evaluate the suitability and economic performance of the proposed fishing gear and method. During the entire period of the scientific fishing experiments, a total of 27,047 individuals (220,564 g) representing 43 aquatic species were collected. Metapenaeus joyneri was the dominant species, accounting for 20,520 individuals (75.9%) of the total catch, followed by Nuchequula nuchalis 1,290 individuals (4.8%), Thryssa kammalensis 1,216 individuals (4.5%), Loliolus japonica 1,109 individuals (4.1%), Portunus trituberculatus 941 individuals (3.5%), and 38 other species 1,971 individuals (7.3%). The two vessels participating in the commercial trial fishery operated for a total of 22 fishing days in May and 24 fishing days in June. Total catches of Metapenaeus joyneri were 9,879 kg in May and 14,113 kg in June, corresponding to an average daily catch of 522 kg. The total auction value of the catch amounted to KRW 89.782 million. Stock assessment results indicated that the Metapenaeus joyneri stock in the coastal and offshore waters of Jeollabuk-do was in a stable condition, with no evidence of overfishing or stock depletion. The sustainable catch level of Metapenaeus joyneri was estimated at 342 tons. In addition, the profitability of the pelagic shrimp beam net fishery during the two-month trial period (May-June 2025) was estimated at 35.2%, indicating favorable economic performance. Therefore, if cooperative management of Metapenaeus joyneri resources can be established with the fishery of stow net on stakes sector, which is operating in the same fishing grounds focusing on the same primary target species, pelagic shrimp beam net gear and fishing methods targeting Metapenaeus joyneri could be incorporated into the existing fisheries management framework.
4,000원
7.
2026.05
구독 인증기관 무료, 개인회원 유료
This study evaluates the dynamic stability of an 85-meter single screw fisheries training vessel through empirical prediction, full scale sea trials, and model test analysis. The empirical formula indicated marginal instability. Full scale sea trial tests showed that the first overshoot angle in the 10°/10° zig-zag test exceeded the IMO criterion, a clear unstable loop appeared in the direct spiral test and a residual yaw rate persisted in the pull-out test, confirming dynamic instability. Model propeller wake test report results revealed that the axial velocity distribution was nearly symmetric between port and starboard semi-circles while the tangential component revealed opposite signs indicating a propeller-induced swirl structure. Although the tangential velocity magnitude was small, such asymmetric inflow may influence rudder inflow under marginally unstable conditions. The instability, therefore, is interpreted as a combined effect of hull form characteristics and propeller induced three dimensional flow structures.
4,000원
8.
2026.05
구독 인증기관 무료, 개인회원 유료
In the coastal waters of Jeju, six-year data (2019 – 2024) indicate that fishing vessels under ten tons represented an annual average of 80.89% of accidents, with the distribution by tonnage as 1-5 tons, 5-10 tons, and under one ton. While capsizing and sinking accounted for a smaller fraction of total incidents, their frequency increased annually with sinking observed in 2024 after being absent in the previous five years. Predictive analysis suggests that five or more capsizing events per year should occur after 2024, highlighting the close correlation between vessel stability and accident occurrence. The characteristics of 339 FRP Fishing vessels under ten tons in Jeju waters were analyzed. The length-to-beam ratio (L/B) ranged from 1.857 to 5.013, and the breath-to-depth ratio (B/D) from 1.638 to 5.768 with an average of 3.183. Breath was identified as the primary determinant of vessel length: shorter vessels tended to have smaller L/B and larger B/D ratios. Using multiple regression analysis based on fishing ground departure from the ten test vessels, predicted stability values (GM) revealed 41 vessels (12.09%) with negative stability with values ranging from 0.100 to 0.541 and indicated that beam had the greatest influence. These results indicate that insufficient stability, particularly among vessels under two tons, is closely associated with higher capsizing risk. Consequently, this study proposes practical stability criteria based on regression-estimated values and suggests that Korean regulations should lower the minimum applicability threshold for stability requirements to prevent accidents. Continuous data collection and evaluation are recommended to strengthen vessel safety standards.
4,000원
9.
2026.05
구독 인증기관 무료, 개인회원 유료
This paper presents an experimental investigation into multi-diode open-circuit faults in the rotating rectifiers of brushless synchronous generators. Unlike single-diode faults, multi-diode faults introduce complex electrical behavior by reconfiguring conduction paths and altering rectifier topology. Representative fault scenarios, categorized from Class 3 to Class 8 are examined under no-load conditions to isolate excitation system dynamics. Key electrical quantities, including exciter armature currents ( - ), rectifier output voltage ( ), main field current ( ), exciter field current ( ), and generator terminal voltage ( ), are evaluated. The results show that electrical characteristics are governed by the effective conduction paths and the resulting rectifier structure rather than the number of faulty diodes. Depending on the fault condition, the rectifier transitions move transitions from asymmetric three-phase rectification to single-phase full-wave or half-wave rectification. These structural transitions lead to amplitude reduction and the emergence of dominant frequency components, particularly at 60 Hz and 120 Hz. The findings provide a structural interpretation and electrical characteristic analysis of multi-diode faults.
4,200원
10.
2026.05
구독 인증기관 무료, 개인회원 유료
This study investigates the global hull vibration characteristics of a 2,000-ton fisheries training vessel and evaluates its habitability based on the ISO 6954:2000(E) standards. A three-dimensional finite element model, developed using MSC Patran/Nastran, was validated against sea trial measurement data. The results indicate that natural frequencies are generally below 10 Hz and decrease with increasing load. The habitability assessment shows that vibration levels remain at 5-8% of the ISO criteria for the FEA model and 4-10% for the measured data, confirming that the vessel satisfies the regulatory limits. The methodology, validated by these measurements, provides a quantitative technical basis for the design verification and operational management of similar vessels.
5,200원
