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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Fisheries and Aquatic Sciences
Journal Basic Information
Journal DOI :
The Korean Society of Fisheries and Aquatic Science
Editor in Chief :
Volume & Issues
Volume 25, Issue 6 - Nov 1992
Volume 25, Issue 5 - Sep 1992
Volume 25, Issue 4 - Jul 1992
Volume 25, Issue 3 - May 1992
Volume 25, Issue 2 - Mar 1992
Volume 25, Issue 1 - Jan 1992
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Coastally Trapped Waves over a Double Shelf Topography(II) : Free Waves with Linear Topographies
PANG Ig-Chan ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 443~456
For a linear double shelf bottom topography as in the Yellow Sea, the dispersion relation of coastally trapped waves is derived for the general case Including high-frequency and short waves and for the case of low-frequency and long waves. With linear bottom topography, the governing equation is Bessel's equation for the latter case but Hummer's equation for the former case. Hypergeometric Functions, which are the solutions of Hummer's equation, are derived and converted to various special functions for the limiting cases. On a double shelf topography, the divergence effects of horizontal flow are important for the wave dynamics, irrespective of cross-shelf dimensions, while on a single shelf they are usually neglected when the cross-shelf dimension is much smaller than the Rossby deformation radius. The divergence effect allows the existence of Kelvin wave and reduces the phase speeds of continental shelf waves. Finally, the frictionless eigenfunctions are proved to be orthogonal.
Coastally Trapped Waves over a Double Shelf Topography(III) : Forced Waves and Circulations Driven by Winds in the Yellow Sea
PANG Ig-Chan ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 457~473
The first order wave equation over a double shelf has wind stresses on both coastal boundaries and wind stress curl forcing across the shelf. In the Yellow Sea, the effect of wind stress curl can be neglected as a forcing of shelf waves. The decay distance of Kelvin waves is much greater than that of continental shelf waves so that Kelvin waves are transmitted nearly intact through the northern embayment. The numerical method of characteristics has been modified to accomodate wave propagation of opposite directions. Using a little more realistic coastline, the wave model hindcast has been improved for current velocity, but hardly for sea level. It means that Kelvin waves, which mainly determine sea levels, are affected little by the change of bottom slope. For a better hindcast of sea level, input energy of Kelvin waves transmitted from the East China Sea is needed. The basic structure of downwind flows along the coasts and upwind flows along the trough supports the seasonal circulations driven by monsoon winds in the Yellow Sea.
Preliminary Analysis of Molecular Biological Methods for Stock Identification of Small Yellow Croaker(Pseudosciaena polyactis) in the Yellow Sea
HUE Hoi-Kwon ; HWANG Gyu-Lin ; LEE Yong-Chul ; CHANG Chung-Soon ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 474~484
The stock identification of small yellow croaker. Pseudosciaena Polyactis from Mokpo area was carried out using molecular biological methods such as mt-DNA restriction fragment length polymorphism(RFLP) and the N-terminal fragment polymorphism of muscle actin obtained after protease digestion. The entire mt-DNA genomic size from the small yellow croaker at Mokpo area was estimated to be about
Kb. Furthermore, fourteen restriction endonucleases revealed a total of 37 restriction sites to the mt-DNA molecule, however, eight of the fourteen enzymes showed a significant restriction site variation. Six of the enzymes examined produced a single restriction profile for all individuals surveyed, indicating that they don't react on the same mt-DNA obtained from small yellow croaker. The Staphylococcus aureus
protease is able to cleave the muscle actin of small yellow croaker and to yield a N-terminal peptide of 26 and 16 KDa, respectively.
Study on the Heavy Metal Concentration in Mussels and Oysters from the Korean Coastal Waters
CHOI Hee-Gu ; PARK Joo-Suck ; LEE Pil-Yong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 485~494
This study dealt with the concentration of heavy metals in mussels, Mylitus edulis and oysters, Crassostrea gigas, in different habitats around the Korean coastal waters during 1985-1989. The high levels of heavy metal concentration in two bivalves were found at Station 1, 2, 5, 23 and 25, while the low levels were found at stations in Chinhae Bay. Oysters were more effective bioaccumulators of Cu, Zn and Hg than mussels showing the ratios of 16:1 for Cu, 1.63:1 for Cd, 1.36:1 for Pb, 7.61:1 for Zn and 2.08:1 for Hg. The larger mussels were, the higher the concentrations of five metals.
Relationship Between Anchovy, Engraulis japonica, Egg and Larval Density and Environmental Factors in the Eastern Waters of Korea
KIM Jin-Yeong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 495~500
The relationship between distribution of eggs and larvae of anchovy, Engraulis japonica, and environmental factors were studied using the data on the ichthyoplankton and zooplankton sampled vertically by net, and water temperature and salinity observed by CTB in the eastern waters of Korea in every two month in 1985. Anchovy eggs and larvae were occurred in June and August. They distributed in the warm water current which was high temperature and salinity in June. Egg and larval distribution area were moved to the offshore in August. It is likely that distribution of anchovy eggs and larval in June significantly correlate with hydroconditions in the eastern waters of Korea.
Characterization of Lipid Prooxidants in Sardine Skin
CHO Soon-Yeong ; MOHRI Satoshi ; ENDO Yasushi ; FUJIMOTO Kenshiro ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 501~510
Lipid prooxidants in sardine skin was characterized. Prooxidants in the sardine skin extract with 0.05M phosphate buffer was purified by successive chromatography on Sephadex G-200, DEAE-Sephadex A-50 and CM-Sephadex A-50. Prooxidants of sardine skin exist mainly in the intermediate molecular weight fractions. Observations of the thermounstability and optimum pH(pH 7.0) suggest that the major prooxidants are enzymes and hemoproteins. They can oxidize well both free and esterified linoleic acid and form conjugated hydroperoxides. From these results, the major prooxidants in sardine skin are assumed to be lipoxygenase-like enzymes.
A Control System for Automization of Food Sterilizing Process
AN Hee-Woo ; CHO Hyun-Duk ; HAN Bong-Ho ; KIM Sang-Bong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 511~519
A microcomputer based control system was constructed to save energy consumption in the thermal sterilizing process. The functional accuracy of system was evaluated through the analysis of the thermal diffusivities of the model solid food, Alaska pollack surimi. The heat penetration curves obtained through the experiments were typical for solid foods. The practical thermal diffusivity calculated from heat penetration curve was a constant value at steady sterilizing temperature, and this was independent of the holding time. At different temperatures, the thermal diffusivity values did not show remarkable differences when compared with those predicted by some experimental equations cited from the literatures. The maximal difference was within the range of
CHO Hyun-Duk ; HAN Bong-Ho ; KIM Sang-Bong ; OK Young-Gun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 520~528
In order to establish the standard conditions for thermal sterilization of foods, a microcomputer based
measuring system was developed upon the basis of the time-temperature profile in food.
was calculated simultaneously from the time-temperature profile, and described as integrated lethality during the whole sterilization process. The accuracy of system was evaluated by the analysis of thermal diffusivity of the model solid food, Alaska pollack surimi. The
could be measured precisely under the different sterilizing conditions as the varied time and temperature. The practical thermal diffusivities from various sterilizing conditions agreed well to the values predicted by some experimental equations suggested in the literatures. The differences were within the range of
Performance of Airlift Pumps for Water Circulation and Aeration
OH Se-Kyung ;
Korean Journal of Fisheries and Aquatic Sciences, volume 25, issue 6, 1992, Pages 529~537
Airlift pumps were tested to evaluate their pumping and aeration capacities. The pumps were 34.5 inch long made of 2, 3, 4 and 6 inch nominal diameter PVC pipes. An one hp air blower was used to supply the air. The air-flow rate was measured by an anemometer type air-flow meter and air pressure was level changes in a water tank from which water was pumped. Aeration by the pumps was tested by the standard aeration test method with the center of pump outlet positioned 3 inches above water surface. Oxygen concentrations in water were measured to determine aeration rate. As pumping head increased by water level draw-down in the tank water flow decreased while air flow increased. The reduction rate of water flow was higher with 4 and 6-inch pumps. Small pumps showed very minor changes in the reduction. Aeration rates were similar among 3, 4, and 6 inch pumps. With one hp air blower 6-inch pump at the minimum pumping head achieved the best performance in terms of water circulation.