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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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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 24, Issue 6 - Nov 1991
Volume 24, Issue 5 - Sep 1991
Volume 24, Issue 4 - Jul 1991
Volume 24, Issue 3 - May 1991
Volume 24, Issue 2 - Mar 1991
Volume 24, Issue 1 - Jan 1991
Selecting the target year
Difference of Toxicities among Tissues in the Pufferfish Fugu xanthopterus('Ggachibog')
KIM Hyun-Dae ; JEONG Dong-Youn ; KIM Dong-Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 363~368
Twenty-four specimens of the pufferfish Fugu xantheptens, Korean name, 'Ggachibog', collected at a fish market of Pusan were examined for anatomical distribution of toxicity by the mouse bioassay method. Frequency of toxic specimens was 88, 75, 54, 13, 71, 80 and
, in terms of liver, intestine, skin, muscle, testis, ovary and bile, respectively. Their the highest toxicity scores were 417, 387, 112, 17, 39, 403 and 178 MU/g, respectively; and average toxicity values were
respectively. A significant correlation between the toxicities of liver and intestine(r=0.93), between those of liver and skin (r=0.79) and between those of liver and ovary(r=0.83) was observed.
Copepod Parasites of Commercial Bivalves in Korea -II. Copepods from Cultured Bivalves-
HO Ju-Shey ; KIM Il-Hoi ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 369~396
Nine species of copepod parasites are recorded from nine Korean cultured bivalves. One new species, Lichomolgus similis n. sp. is included, and other eight species are: Conchyliurus quintus, Pseudomyicola spinosus, Myicola ostreae, Ostrincola koe, O. japonica, Herrmannella longicaudata, Modiolicola bifidus, M gracilicaudus. The relationship between the copepod parasites and their host bivalves is discussed.
Steady state and Lifetime Measurements of Primary Fluorescence from Phytoplanktons
PARK Mi-Ok ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 397~404
The steady state and decay characteristics of primary fluorescenece of phytoplanktons including Cyanophyceae and Cryptophyceae were investigated in vivo. At 580-640 nm region, fluorescence emission spectra were obtained from all algae examined. The observed fluorescence emission maxima were similiar
except Synechocorcus sp. (SYN). Considered
of emission spectra of phycobiliproteins and the excitation spectra with
, it seems to be originated from biliproteins. Fluorescence lifetimes
and decay curves were compared with standard solution of candidate organic compounds, b-phycoerythrin. The
values obtained for phytoplankton with
were different depending upon the species of algae. The observed
values were ranged from 1.39 ns to 1.95 ns. These are considerably shorter than
for standard solution of b-phycoerythrin. The reduction of
for phycoerythrin in vivo seems to be originated from effective energy transfer system between Chl. a and phycobiliprotein in intact cell. There are subtantial differences in fluorsecence spectra and lifetimes at the class level. At the species level, differences seems to be much smaller. The result of experiment suggests that measurement of fluorescence lifetimes may be helpful in the rapid characterization of algae. Direct application will likely be found in combination with the measurement of other luminescence parameters.
Effects of Dipotassium Phosphates on the Texture of Frozen Whitefish ana Burbot Muscles
CHUN Soon-Sil ; KIM Mu-Nam ; LEE Kang-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 405~412
Whitefish(Coregonus clupeaformis) and Burbot(Lota iota) muscle was filleted, treated with dipotassium phosphate(pH 8.0) by means of high pressure injection method, and finally stored at
for 3 months. Factors, the pH, moisture content, and total amount of collagen were analyzed on the samples before and after the frozen storage. The pH of the sample showed substantially higher values in the phosphate treated muscles than the controls and decreased after 3 months storage in all of the whitefish and burbot samples, there was no significant differences in the moisture content between the control and treated but some reduction occurred during frozen storage. The amount of total collagen in the tail sections of burbot was significantly high comparing with head sections and hardness of the tail section also showed high values which indicated that total collagen might be related to the texture of fish muscle. However, in the case of whitefish the effect was not apparent. The effects of these factors on the hardness determined by Instron texturometer were analyzed through standardized multiple regression. A specific factor was not apparent to the texture of white fish while pH showed the highest correlation to the hardness of the burbot muscle.
Variability of Sea Levels at Mukho and Ullungdo off the East Coast of Korea
LEE Jae-Chul ; KIM Soon-Young ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 413~427
Variability of sea levels at Mukho and Ullungdo and sea level difference(SLD) associated with current is investigated. Time series of adjusted sea levels at both places have very similar pattern of change. Two components appear to contribute to the correlation between sea level and SLD. Low frequency thermosteric effect causes the sea level to rise and fall at the same time. Geostrophic effect of major currents is responsible for the sea level change in opposite ways at both sides. Two contributions have a cancelling effect for sea level change at Mukho while they are additive at Ullungdo. Characteristics of time series in frequency domain are divided into two parts with respect to 0.01 cycles per day(cpd). At Mukho, the cancelling effect yields small values of coherence for low-frequency bands whereas the dominant geostrophic influence may be responsible for the phase relations of about
between sea level and SLD at higher frequency. Bimonthly dynamic height difference(DHD) between Mukho and Ullungdo is very significantly correlated with SLD. This result suggests that DHD thus the average velocity of current through the Mukho-Ullungdo section can successfully be diagnosed by the sea level records at both locations. For the annual variations, maximum SLD occurs at Mukho-Ullungdo section about 40 days later than the Korea Strait.
Coastally Trapped Waves over a Double Shelf Topography(I) : Free Waves with Exponential Topography
PANG Ig-Chan ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 428~436
Double shelf topography allows the existence of two sets of waves propagating in opposite directons. In the case that two shelves are apart sufficiently enough, the solutions show two independent sets of waves which recover the single shelf waves. However, if the distance between two shelves is less than the Rossby deformation radius, the waves become dependent on the geometry of both shelves. Even over a double shelf topography, shelf waves propagate with the shallow water to the right in the Northern Hemisphere. The group velocity of shelf wave has the same direction as phase velocity in the long wave case, but the opposite direction in the short wave case. Each shelf mode has a zero group velocity at some intermediate value of wave length.
Variability of Sea Levels Associated with the Tsushima Current in the Korea Strait
LEE Jae-Chul ; CHO Kyu-Dae ; KIM Soon-Young ; KIM Ho-Kyun ; SHIM Tae-Bo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 437~449
Time series of barometrically adjusted sea level at Pusan, Izuhara and Hakada are analyzed to study the fluctuations of the Tsushima Current through the Korea Strait. Variability of sea levels and their differences is divided into two parts with respect to the frequency of 0.01 or 0.02 cycles per day(cpd) At lower frequency, both of sea levels and sea level difference(SLD) are coherent and in phase to each other. Pusan has smaller seasonal variations in sea level than other two stations because the effects of geostrophic current and prevailing wind have a negative influence on the seasonal thermosteric contribution to sea level change. Low frequency variability of SLD thus of the Tsushima Current is much greater in the western channel. For higher frequency parts, SLD in the eastern channel has larger variability and is not coherent with that of the western channel. Sea levels at Pusan and Izuhara are
out of phase with SLD in the western and eastern channel respectively, whereas the Hakada level is in phase. This result indicates that eastern channel has a normal response to the along-channel winds and cross-channel geostrophy because Izuhara faces the eastern channel.
Long-Term Fluctuations of Water Temperatures in the Upper 200m off the Southeast Coast of Korea
KANG Yong-Q ; KANG Hye-Eun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 450~458
The thermal structures and their spatio-temporal fluctuations in the upper 200m layer off the southeast coast of Korea are studied using the bimonthly temperature data for 17years(1967-1983) at 37 stations. We analyzed the fluctuations of the temperatures in the surface(0-100m) and in the subsurface(100-200m) layers. The fluctuations of temperatures in the surface water are dominated by the annual variation, whereas the subsurface layer temperatures contain considerable non-seasonal fluctuations. The distributions of water temperature anomalies in the subsurface layer are closely related with those in the surface layer. The predominant periods of temperature fluctuations in the subsurface layer, other than the annual variation, are 14 and 70 months. The period of 14 months coincides with that of the pole tide or Chandler wobble. The cluster analysis shows that our study area can be divided into the cold, the frontal and the warm regions.
Influence of Discontinuous Layer on Plankton Community Structure and Distribution in Masan Bay, Korea
HAN Myung-Soo ; KIM Se-Wha ; KIM Young-Ok ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 459~471
The community structure and micro-scale distribution of plankton in relation to hydrography were investigated in Masan Bay, Korea in October 1989. Warmer and less saline waters with stratification was located in the inner part of the Pudo Strait, and chlorophyll-a and nutrients were higher. Both phytoplankton biomass and nutrients was changed dramatically around the Strait. Offshore/oceanic species in phytoplankton i.e., Chaetoceres decipiens, Rhizosolenia stolterforthii, Rhizosolenia styliformis and Ceratium trichoceros and zooplankton i.e., Sagitta enflata, Oncaea uenusta and Oikopluera longicaudata occurred mainly in well mixed waters of the outer part. This suggests that discontinuous layer seems to play an important role as an approximate border for the plankton population. This layer was located between Station 3 and Station 4 near the Pudo Strait, since the layer consisted of a series of micro-scale discontinuties of salinity and dissolved inorganic nutrients gradient. Phytoplankton patchs of more than 801e1 were found only in the inner part of the bay. Depletion of silicate caused by a rapid assimilation of phytoplankton in the inner part of the bay seemed to be responsible for the decline of blooms.
Distribution of Zooplankton in Asan Bay, Korea with Comments on Vertical Migration
PARK Chul ; CHOI Keun-Hyung ; MOON Chang-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 24, issue 6, 1991, Pages 472~482
Seasonal distributions of zooplankton were investigated in Asan Bay, Korea. Labidocera euchaeta, Sagitta crassa, Calanus sinicus, Acartia omorii were dominant taxa throughout the year with seasonally varying percent compositions. Bivalve veliger larva (fall), Decapoda larva (spring and summer), and Paracalanus Parvus, Evadne tergestina (summer) were also dominated during contain period. The patterns of time dependent vertical distributions of one major taxon, A. omorii, showed seasonal differences, i.e., it showed the trends of normal vertical migration in winter and reversed vertical migration in spring. At surface layer day time abundances were equal or less than night time abundances in general.