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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 29, Issue 6 - Nov 1996
Volume 29, Issue 5 - Sep 1996
Volume 29, Issue 4 - Jul 1996
Volume 29, Issue 3 - May 1996
Volume 29, Issue 2 - Mar 1996
Volume 29, Issue 1 - Jan 1996
Selecting the target year
Zooplankton Community and Distributions of Copepods in Relation to Eutrophic Evaluation in Chinhae Bay
KANG Young-Shil ; PARK Joo-Suck ; LEE Sam-Seuk ; KIM Hak-Gyoon ; LEE Phil-Yong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 415~430
Spatio-temporal variations in zooplankton community and ropepod indicator species were investigated along with the interaction between zooplankton distribution and environmental factors in Chinhae Bay. Zooplankton samples were monthly collected at 7 stations from February to September in 1993. A NORPAC net was vertically hauled from bottom to surface, At the same station, environmental factors such as temperature, salinity and COD (chemical oxygen demand) were measured at two different water layers, surface and bottom. In August and September, salinity declined below
, while eutrophic parameters such as COD showed the higher concentrations than those in other months, with higher concentrations at inner bay stations. Salinities were, however, higher at bay mouth areas. These distributional patterns were believed to be caused by input and dispersion of organic matters from nearby land. Zooplankton communities were composed of
. Of these, Noctiluca scintillans was predominant and occupied
of total zooplankton abundance. Cladocera and Copepoda were secondly abundant taxa. Among 6 to 10 copepod species appeared, Acartia omorii and A. hudsonics were most common species during the survey months except March and September. Species diversities were greater, in general, at inner bay than outer bay. The lowest diversity index was observed in February, while the highest in July. Cluster analysis could divide the study area into 2 or 4 zones for each month. Zone 1, mouth area of the bay, was characterized by the influence of offshore waters. Zone II was mixing area. Zone III and IV seemed to be affected by nearby land.
Model Test on the Loss of Experimental Fishy Odor in Tilapia, Oreochromis niloticus, by Sea Water Acclimation
YOON Ho-Dong ; SUH Sang-Bok ; KIM Yeong-Sook ; LEE Jong-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 431~437
The efforts of removing the specific fresh water fishy odor were studied by inducing tilapia, Oreochromis niloticus, to sea water in the use of the flavoring chemicals such as pyrrolidine and piperidine as experimental flavors. The amines added to the grinded muscle of tilapia were recovered by
for pyrrolidine and
for piperidine. When live tilapia were retained in a tank containing 100 ppm solution of the flavor for 30 min and then begun to start the acclimation into sea water with daily increase of
salinity within 7days, no amines in the skin and the muscle of tilapia were detected after 4 days of acclimation to sea water. For the purge effects of amino in the skin and the muscle of tilapia, the concentration of pyrrolidine and piperidine lost
in the muscle and
in the skin of tilapia after purging in fresh water for 72 hrs, while
of amines were removed in the muscle and
in the skin of tilapia acclimated to sea water after purging in on sea water for 72hr. Loss rates of pyrrolidine and piperidine were found to be
from the muscle and
from the skin of tilapia in the fresh water, while
from the muscle,
from the skin of tilapia in the sea water after 24hrs of exposure, respectively.
Uptake of Polysacchride with Development of Alimentary Tract in Embryo of Ditrema temmincki (Teleostei: Imbiotocidae)
LEE Jung Sick ; CHIN Pyung ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 438~449
Development of alimentary tract and nutrient absorption in embryo of the viviparous teleost surfperch, Ditrema temmincki were investigated with histochemical methods. Just after hatching mouth of the embryo was opened, and the end part of alimentary tract was opened in TL 4.0 mm. Mucosal folds in the alimentary tract appeared at posterior region from TL 5.0 mm. In TL 30.0 mm, the alimentary tract of the embryo could be distinguished into pharynx, esophagus, anterior intestine, mid intestine, posterior intestine, rectum and anus. From over TL 50.0 mm, the internal histological patterns of the alimentary tract showed similar structures as seen in the adult. The mucous cells in the pharynx were positively reacted to PAS in TL 7.0 mm. PAS positive goblet cell appeared in the intestine from 25.0 mm, from TL 30.0 mm in the rectum, from TL 40.0 mm in the anus and from 50.0 mm in the esophagus. Yolky materials were absorbed completely in TL 6.0 mm. PAS positive polysaccharide absorptive cells began to appear at the posterior parts of the intestine in TL 7.0 mm and appeared in TL 13.0 mm at the rectum, in TL 15.0 mm at the anterior intestine and in TL 40.0 mm at the anterior part of anus. During the gestation period, nutrient absorptive type of the embryo within the maternal body is a placental analogues type of metrotrophy.
Food Organisms of the Postlarval Shad (Konosirus punctatus) in Kwangyang Bay
PARK Kwang Jae ; CHA Seong Sig ; HUH Sung Hoi ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 450~455
To investigate the food organisms of the shad (Konosirus punctatus) during the postlarval stage, the gut contents of the shad, captured in Kwangyang Bay in June 1990, were observed. The food organisms food items of the shad larvae of
(NL) were copepod eggs and copepod nauplii, whereas those of the larvae longer than 5.0 mm (NL) were copepod nauplii and Tintinnopsis.
Regional and Seasonal Variations of DIN Fluxes Across the Sediment-water Interface and the Effect of DIN Release on the Primary Production
KIM Do-Hee ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 456~463
The purpose of the present study is to estimate the regional and seasonal variations of dissolved inorganic nitrogen (DIN) flux across the sediment-water interface of the inner and central areas of Hiroshima Bay from August 1994 to May 1995. In addition it compares the measured methods and estimates the effect of DIN released from sediment to the primary production of Hiroshima Bay. One method used in this study is to calculate DIN flux from a concentration gradient between sediment porewaters and the overlying water, and the other method is to measure DIN flux from the sediment-core experiment. The fluxes of
in the inner area were higher than those in central area, all of which showed seasonal variation.
flux was maximum in August, while
flux was high in January compared with the other seasons. The calculated
fluxes from sediments were
, respectively. The measured
fluxes across the sediment-water interface were
, respectively. The former was lower than the tatter. The calculated
flux showed closer relation to environmental factors (dissolved of gen in the overlying water, temperature and redox condition of the sediments) than the measured one did. On the other hand, in the case of
flux both the calculated and the measured showed little relation to environmental factors, while they turned out to have stronger relation with their concentration in sediments. DIN released from the sediment is expected to support about
of the primary production in Hiroshima Bay.
Effects of the Dietary Protein and Energy Levels on Growth in Fat Cod (Hexagrammos otakii Jordan et Starks)
LEE Jong Kwan ; LEE Sang-Min ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 464~473
Two-month feeding experiment was conducted to investigate the optimum dietary protein level and energy to protein ratio in fat cod (Hexagrammos otakii Jordan et STARKS). The fish averaging 29 g were fed with one of the isocaloric diets containing 30, 40, 50 or
of protein, or with one of the isoproteic diets containing 9, 10, 11 or 12 of available energy/protein (E/P) ratio. Weight gain and feed efficiency increased significantly with dietary protein level up to
, then decreased with
protein diet (P<0.05). Daily protein intake increased significantly with dietary protein level, whereas protein efficiency ratio decreased with dietary protein level (P<0.05). Second order polynomial regression analyses of percent weight gain and daily protein intake may indicate that the adequate dietary protein level is
and daily protein requirement per 100g fish is 1.5g for maximal growth. Weight gain, feed efficiency and protein efficiency from fish led the diet containing 12 of E/P ratio were significantly higher than those from fish fed the other diets (P<0.05). Daily feed or protein intake from fish fed the diet containing 12 of E/P ratio was significantly lower than those from fish fed the other diets (P<0.05). Daily lipid intake increased significantly with dietary E/P ratio (P<0.05).
Physicochemical Changes in Black Seabream (Acanthopagrus schlegeli) Milt during the Spermiation Period
LIM Han Kyu ; CHANG Young Jin ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 474~480
Physicochemical changes of milt during the spermiation period were investigated in black seabream (Acanthopagrus schlegeli) reared in recirculating seawater system. The spermiation period for the milt collection in cultured brood stock was from 11 April to 4 June. During the spermiation period, average milt volume (ml/100 g body weight) was
and maintained high level from 2 May to 4 June. The total number of stripping spermatozoa per 100 g body weight reached the maximum value
in 9 May, then decreased rapidly thereafter. Spermatozoa concentration per ml reached the minimum value in 2 May. There was no change in spermatocrit for the spermiation period. Total protein, total lipid, glucose and Na concentration in spermatozoa and seminal fluid were lower than those in plasma. Total protein, total lipid and K concentration in spermatozoa were higher than those in seminal fluid. The glucose concentration in spermatozoa and seminal fluid in April and May were significantly higher than those in June.
Paleoenvironments and Volcanism of the Ulleung Basin : Sedimentary Environment
PARK Maeng-Eon ; LEE Gwang-Hoon ; SONG Yong-Sun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 481~496
The last Sea is a typical bark-arc basin consisting of basins, plateaus, ridges, and seamounts. The Ulleng Basin, located in the southwestern corner of the last Sea, contains thick Neogene sedimentary sequence. Analysis of over 2,500 km of single-channel seismic reflection data suggests that hemipelagic sedimentation prevailed over much of the basin during the late Miocene and pelagic sedimentation became more dominant during the Pliocene. During the Pleistocene terrigeneous sediments transported by turbidity currents and other gravity flows, together with continuous hemipelagic settling, resulted in well-stratified sedimentary layers. Influx of terrigenous sediments during the Pleistocene formed depocenters in the western and southern parts of the basins. In the Ulleung Interplain Gap, where the Ulleung Basin joins the deeper Japan Basin, sediment waves suggesting bottom current activities are seen.
Eggs Development and Larval Development of the Ice Fish, Hypomesus transpacificus nipponensis McAllister
HAN Kyeong-Ho ; LEE Seung-Ju ; KIM Yong Uk ; MYOUNG Jung-Goo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 497~502
Artificial fertilization of ice fish, Mypomesus transpaciticus nipponensis caught at Milyang-river and Osib-chun brook was performed in March 24, 1990, and the hatched larvae were reared for 25 days to describe the development of eggs and larvae. Fertilized eggs were spherical in shape, measuring
in diameter (mean: 0.97 mm) and translucent adhesive with many small-sized oil globules on the surface. Hatching in the indoor tank started from the 170 hours after fertilization under
water temperature. Newly-hatched larvae were measured
in total length (mean: 4.05 mm), and mouth and anus were not yet open. They had one yolk sac on the anterior part of abdomen, straight-type's notochord, and
myotomes. The larva of 5 days old transformed to postlarval stage and measured
(mean: 5.37 mm) in total length. As the yolk sac was completely absorbed, mouth and anus were open, and they fed rotifers vigorously. In 20 days after hatching, the larvae grew to 8.38 mm in TL, and the caudal notochord flex at
. In 25 days after hatching, total length reached 9.63 mm. The pan of the fin-fold of the future dorsal and anal fins became high.
Regeneration Processes of Nutrients in the Polar Front Area of the East Sea 1. Relationships between Water Mass and Nutrient Distribution Pattern in Autumn
Moon Chang-Ho ; YANG Han-Soeb ; LEE Kwang Woo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 503~526
A synoptic survery of chemical characteristics in the last Sea of Korea was carried out at the 11 stations near Ullungdo in November, 1994 on board R/V Tam-Yang. On the basis of the vortical distribution patterns of temperature, salinity and dissolved oxygen, water masses in the study area are divided into five groups; 1) Tsushima Surface Water (TSW), 2) Tsushima Middle Water (TMW), 3) East Sea Intermediate Water (ESIW), 4) last Sea Proper Water (ESPW), 5) Mixed Water (MW). In the vertical profiles of nutrients, the concentrations were very low in the surface layer and increased rapidly near the thermocline. There was a slight decrease in the ESIW and the concentrations were constant with the depth below 300m except dissolved silicate which still increased with depth. Relatively high value of Si/P ratio (25.2) in ESPW, whick is the oldest water mass, suggests that Si is regenerating more slowly compared to other nutrients. The relatively high value of N/P ratio (18.6) in the surface layer might be related to high vertical eddy diffusivity
and high nitrate upward flux of
, compared to the values reported in other areas. Apparent Oxygen Utilization (AOU) was very low in the surface layer and increased in the TMW, but there was a slight decrease in the ESIW. The highest value of AOU occurred in the ESPW. The slpoe of P/AOU was 0.50. The study on the relationship between water masses and nutrient distribution patterns is important in understanding the regeneration processes of nutrients in the polar region of the last Sea.
Diel Horizontal Migration of Planktonic Copepods in the Surf Zone of Yongil Bay, Korea
Suh Hae-Lip ; Yu Ok-Hwan ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 527~536
The patterns of diel horizontal migration (DHM) of 7 copepod species are compared as part of a general investigation of the zooplankton adaptations to the surf zone habitats. In a sandy shore surf zone of Yongil Bay, 3 sites such as the bottom and surface of 1 m water depth and water's edge are sampled with a sledge net(n=108). The surf zone copepod assemblage is dominated by 7 species; Acartia hudsonica, Fseudodiaptomus marinus, Paracalanus indicus, Calanus sinicus, Oithona similis, Sinocalanus tenellus and Labidocera bipinnata. Threefold variations in copepod abundance are observed within a diel cycle. Abundances of 7 dominant species and total copepods captured in the surface exhibit significant diel differences, but those taken in the bottom are not significantly affected by diel period. It is shown that about
of the surf zone copepods performed DHM. The nocturnal high densities of copepods occurred for a neap tide when the offshore winds prevailed, suggesting the animals' ability for horizontal orientation and an active locomotion without invoking passive transportation by currents. Photoreactive behavior of copepods triggered by relative changes in light intensity may be a primary factor inducing DHM by aggregating in the surf zone during the night and spreading out at day; then copepods may reduce encounters with visual predators. In A. hudsonica, ontogenetic variations in timings of DHM are evident. Such variations are likely to minimize intraspecific competition for diets. Data on shoreward migration of copepods indicate that A. hudsonica, P. indicus, O. similis and S. tenellus can maintain swimming velocities of about
for durations of more than an hour. Our observations of strong diel difference in abundances point out the need for both day and night samplings in surf zone habitats, if the importance of these habitats to planktonic copepods are to be fully understood.
Distribution and Growth Pattern of Sternaspis scutata (Polychaeta : Sternaspidae) in Chinhae Bay, Korea
LIM Hyun-Sig ; HONG Jae-Sang ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 537~545
A population study on the sternaspid polychaete Sternaspis scutata (Ranzani) was conducted in Chinhae Bay, Korea, from lune 1987 to May 1990. Sternaspis scutata was chiefly distributed in the mouth area of the bay, and its distributional delimitation remained unchanged all the year round. Abundance of this species appeared to be related to the organic carbon content of the sediment. It was relatively high in the area where the organic content of the sediment was between 2.0 and
with mean grain size of
. The relationship between the length of the ventral plate and the body wet weight is Wt=13.2752
. Therefore, the length of ventral plate can be used as an indicator of body growth of this species. The growth curves fitted to yon Bertalanffy equations for ventral plates and weights are
, respectively. Size frequency histograms showed that the settlement occurred during all the year round with its peak in summer.
Flavor Compounds of Dried Shellfishes 1. Changes of Nitrogenous Compounds in Shellfishes During Drying Process
JE Yoi-Kwon ; KIM Young-Sook ; LEE Jong-Ho ; JUNG Byung-Chun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 29, issue 4, 1996, Pages 546~555
Level of nitrogenous compounds in dried shellfish related to the formation of flavors during processing and storage was investigated. Fresh samples of blue mussel, short-necked calm and pacific oyster showed relatively low levels of ATP, ADP and AMP, but high levels of iMP and inosine. Relatively high content of TMAO in fresh samples was markedly reduced in the samples broiled samples, but TMA content was rather elevated in the samples broiled, which was a lowered result of TMAO content. The degree of reduction of TMAO and enhancement of TMA contents was relatively small in the hot-air dried samples during storage periods. Glycinebetaine content in fresh samples was slightly decreased by boiling and broiling. Contrast to glycinebetaine content, hormaline and trigonelline contents were severely reduced by boiling and broiling. Twenty-nine kinds of amino acids and their derivatives were identified in the sample of blue mussel, short-necked calm. Among them, glycine, alanine, arginine, glutamic acid and lysine were major amino acids, but contents of these amino acids was greatly decreased in the samples after drying and boiling processes.