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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean society of Fisheries Technology
Journal Basic Information
Journal DOI :
The Korean Society of Fisheries Technology
Editor in Chief :
Volume & Issues
Volume 46, Issue 4 - Nov 2010
Volume 46, Issue 3 - Aug 2010
Volume 46, Issue 2 - May 2010
Volume 46, Issue 1 - Feb 2010
Selecting the target year
Catches comparison according to the codend mesh size of stow net on anchor in the West Sea of Korea
Cho, Sam-Kwang ; Park, Chang-Doo ; Kim, Hyun-Young ; Kim, In-Ok ; Cha, Bong-Jin ;
Journal of the Korean society of Fisheries Technology , volume 46, issue 1, 2010, Pages 1~9
DOI : 10.3796/KSFT.2010.46.1.001
Experimental fishing was carried out to compare fishing status according to the codend mesh size (raschel, 15mm, 25mm, 35mm, 45mm) of stow net on anchor in the coastal waters of Seocheon after manufacturing five kinds of fishing gears and commercial fishing boat (7.93 tons) was used for it. Total catches of raschel, 15mm, 25mm, 35mm, 45mm codend were 816,949g, 203,994g, 1,405g, 51,576g, 194g in September and 40,545g, 66,974g, 14,692g, 12,647g, 12,655g in October. Dominance species were anchovy (Engraulis japonicus) in raschel codend, largehead hairtail (Trichiurus lepturus) in 15mm and 35mm in September, and the amount of catches was very small in 25mm and 45mm codend due to the fishing gear damage. In October, dominance species were anchovy and beka squid (Loligo beka) in raschel, 15mm, 25mm codend, and cuttlefish (Sepia esculenta) and beka squid were mainly caught in 35mm and 45mm codend. In addition, total length of anchovy and cardinal fish (Apogon lineatus) were increased according to the increase of codend mesh size but there was no difference in the mantle length of cuttlefish and loligo beka.
The behavior characteristics according to the quality of the sinkers of the yellow croaker drift gill net in the field
Kang, Kyoung-Bum ; Kim, Suk-Jong ;
Journal of the Korean society of Fisheries Technology , volume 46, issue 1, 2010, Pages 10~19
DOI : 10.3796/KSFT.2010.46.1.010
As a series of studies about improvement of yellow croaker drift gill net fishing gear and development of the labor saving fishing system, this study analyzed the behavior characteristics of fishing gear, which does use three types of different sinker materials in the field tests. The result of maritime performance test indicated that the fishing gear which used the lead reached the maximum depth and bio ceramics hauled to the surface of water the fastest. The correlation between the sinking time (St) and depth (Dsl, Dsc, Dsb) of maritime performance test can be shown such experimental equations as Dsl=2.70St - 0.75, Dsc = 2.38St - 1.15, Dsb = 1.77St - 4.00. The correlation between the hauling time (Ht) and depth (Dhl, Dhc, Dhb) of maritime performance test can be shown such experimental equations as and Dhl = 7.88Ht + 35.48, Dhc = 7.80Ht + 40.01, Dhb = 7.95Ht + 36.44.
Dynamic behavior of a submersible fish cage rigged with a circular floating and a sinking collar
Lee, Chun-Woo ; Lee, Ji-Hoon ; Choe, Moo-Youl ; Lee, Gun-Ho ;
Journal of the Korean society of Fisheries Technology , volume 46, issue 1, 2010, Pages 20~31
DOI : 10.3796/KSFT.2010.46.1.020
In this research, the submersible fish cage was designed to avoid structural and biological damage during harsh sea conditions. The submersible cage system consists of netting, mooring ropes, a floating collar, floats, sinkers and anchors. Whole elements of the cage were modeled on the mass-spring model. The computer simulations were carried out to investigate the dynamic behavior of the cage and to calculate mooring line tension subjected to tidal currents and waves. As expected, the tension values in the mooring line of the submerged position are 36% less compared to that of the surface cage under the same loading conditions. As the wave was used in combination with the current velocity of 1m/s, the average tensile load for the submerged cage showed 85% of the value for the floating cage. The simulation results provide an improved understanding of the behaviors of the structure and valuable information on the optimized design of the cage system exposed to open ocean environmental factors.
A study on indicators and reference points for the ecosystem-based resource assessment
Zhang, Chang-Ik ; Park, Hee-Won ; Lim, Jung-Hyun ; Kwon, Hyeok-Chan ; Kim, Doo-Hoon ;
Journal of the Korean society of Fisheries Technology , volume 46, issue 1, 2010, Pages 32~49
DOI : 10.3796/KSFT.2010.46.1.032
Ecosystem-based fisheries management requires a holistic assessment of the status of fisheries by integrating fishery ecosystem indicators for management objectives. In this study four objectives were identified such as the maintenance of the sustainability, biodiversity and habitat quality and socio-economic benefits. The ecosystem-based fisheries assessment (EBFA) model to assess fisheries and their resources at the ecosystem level developed for Korean fisheries (Zhang et al., 2009) has a number of indicators for three management objectives. However, it was found that there were some overlapping components among indicators and that there were difficulties in assessing some indicators in the EBFA model. This study identified problems of the approach and suggested more pragmatic and simpler indicators. It also presented alternative reference points to assess indicators and discussed issues associated with the application of the EBFA model to a marine ranching ecosystem. In this study a total of 24 indicators were used for the assessment which included 4 socio-economic indicators. New indicators and reference points were demonstrated by applying it to the Uljin marine ranch.
Stabilization of ship's heading in AIS of fishing vessel by a hybrid GPS/EM compass
Lee, Yoo-Won ; Jo, Hyeon-Jeong ; Lee, Dae-Jae ;
Journal of the Korean society of Fisheries Technology , volume 46, issue 1, 2010, Pages 50~55
DOI : 10.3796/KSFT.2010.46.1.050
The ship's heading information of hybrid GPS/EM compass were applied to the AIS of fishing vessel and examined the possibility of accuracy improvement. It is observed 453 each in AIS receiver of land among 3,982 each in AIS Rx/Tx transponder of the test ship at sea, and transmission interval according to the speed of ship is determined the 11.4% good transmitting data of the all information. In results, maximum compass error for the ship's heading of an EM compass was
. The variance of ship's heading owing to the speed of ship is surveyed. The COG (Course Over Ground) was changed extremely in
range under 4.9knots, and in
range over 4.9knots. Finally, using the ship's heading of EM compass and the COG from GPS for the autopilot system of a small fishing boat and the ship's heading information of AIS results in danger on the own ship's navigation safety and leads to make confusion both the others and VTS (Vessel Traffic Service) center. Therefore, the hybrid GPS/EM compass is identified as the best system for a small fishing boat and is allowed to offer continuously a ship's heading information with high accuracy and stability.
A study on the maneuverabilities of the marine research vessel CHARMBADA
An, Young-Su ; Bae, Gwang-Min ; Jang, Choong-Sik ; Jung, Yun-Soo ; Kang, Il-Kwon ; Kim, Bo-Yeon ;
Journal of the Korean society of Fisheries Technology , volume 46, issue 1, 2010, Pages 56~69
DOI : 10.3796/KSFT.2010.46.1.056
This study was intended to determine the maneuverability of the vessel CHARMBADA. When the rudder angle was at
, the maximum advance by slow, half and full ahead were varied in the range of 523.6-131.3m, 528.8-177.2m and 530.6-219.7m, respectively. The maximum transfer was 799.9-181.3m, 792.1-232.8m and 807.7-316.9m, respectively. The turning circle ability was better during starboard turning. When the rudder angle was
, variation in the maximum advances was 392.0m, 245.0m and 153.0m. The maximum transfer was 528.0m, 339.0m and 218.0m, respectively based on the regression equations. As the rudder angle became bigger, the maximum advance or maximum transfer became smaller by the exponential function. The advance inertia took 127sec, 145sec, 181sec each until the vessel speed was 7.0konts, 12.0konts, 17.0konts. The static inertia took 245sec, 269sec, 300sec each until the vessel speed was under 2.0konts and the advance distance was 114.4m, 181.2m, 197.0m each. Accordingly, the static inertia was inclined to increase to scale according to the increase in vessel speed. For the CHARMBADA, the smaller the rudder angle was, the much bigger the turning circle became due to adhesion to the skeg, thereby lowering the vessel's turning ability.
Analytical study of house wall and air temperature transients under on-off and proportional control for different wall type
Han, Kyu-Il ;
Journal of the Korean society of Fisheries Technology , volume 46, issue 1, 2010, Pages 70~81
DOI : 10.3796/KSFT.2010.46.1.070
A mathematical model is formulated to study the effect of wall mass on the thermal performance of four different houses of different construction. This analytical study was motivated by the experimental work of Burch et al. An analytical solution of one -dimensional, linear, partial differential equation for wall temperature profiles and room air temperatures is obtained using the Laplace transform method. Typical Meteorological Year data are processed to yield hourly average monthly values. These discrete data are then converted to a continuous, time dependent form using a Fast Fourier Transform method. This study is conducted using weather data from four different locations in the United States: Albuquerque, New mexico; Miami, Florida; Santa Maria, California; and Washington D.C. for both winter and summer conditions. A computer code is developed to calculate the wall temperature profile, room air temperature, and energy consumption loads. Three sets of results are calculated one for no auxiliary energy and two for different control mechanism -- an on-off controller and a proportional controller. Comparisons are made for the cases of two controllers. Heavy weight houses with insulation in mild weather areas (such as August in Santa Maria, California) show a high comfort level. Houses using proportional control experience a higher comfort level in comparison to houses using on-off control. The result shows that there is an effect of mass on the thermal performance of a heavily constructed house in mild weather conditions.