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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Fisheries and aquatic sciences
Journal Basic Information
Journal DOI :
The Korean Society of Fisheries and Aquatic Science
Editor in Chief :
Sungchul C. Bai
Volume & Issues
Volume 3, Issue 3_4 - Dec 2000
Volume 3, Issue 2 - Sep 2000
Volume 3, Issue 1 - Jun 2000
Selecting the target year
Early Stage of Algal Succession on Artificial Reefs at Muronohana, Ikata, Japan
Choi Chang Geun ; Takayama Hiroshi ; Segawa Shigeru ; Ohno Masao ; Sohn Chul Hyun ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 1~7
Different substrata fixed as the roof (for shadow) on artificial iron reef had been developed as a tool for valuable fishery resources. The experiment was set up on a sandy bottom substratum at 8m depth in Muronohana, Ikata, Japan. Within one month of placement of the plates, diatoms dominated the experimental plates with a coverage of
approximately. Enteromorpha intestinalis and Colpomenia sinuosa dominated within three months after the placement. E. intestinalis coverage on substrata was estimated
on the plate shaped iron bar,
on concrete plates,
on the plate fixed pebble,
on the plate to accumulated wood, and 80-100% on the steel materials plate. Whereas after four months of placement, C. sinuosa coverage on plates became
on different plates, and
on the plate to accumulated wood. The differences in E. intestinalis and C. sinuosa colonization on the different substrata were probably due to variations in their surface roughness influencing the settlement of zoospores, and thus gametophyte. development. After five months of placement, the above two species slowly disappeared.
The Chlorophyll Concentration in the Southwestern East Sea Observed by Coastal Zone Color Scanner (CZCS)
Lee Dong-Kyu ; Son Seung-Hyun ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 8~13
Monthly mean chlorophyll concentration in the East Sea was estimated from the ocean color observed by the Coastal Zone Color Scanner (CZCS) on Nimbus-7 satellite which had performed various remote sensing missions from 1979 to 1986. The areas of high chlorophyll concentration were found in the sea between Siberia coast and Sakhalin Island, in the Donghan Bay and in the Ulleung Basin. In the southwestern East Sea, especially in the area near Ulleung Island, the yearly maximum chlorophyll concentration occurred in December. The chlorophyll concentration in Ulleung Basin in December was about two times higher than during spring bloom in April. The early winter bloom occurred in the warm side of the front that was formed between warm water from the East China Sea and nutrition rich cold water from the northern East Sea.
Relationship between the Distribution of Water Masses and that of Demersal Fishes in the East China Sea in Spring
Cho Kyu Dae ; Kim Hee Yong ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 14~22
The relationship between the distribution of demersal fishes and that of the water masses was examined by using the catches data and hydrographic data in the Yellow Sea and the East China Sea on May 13-19, 1996 and May 10-17, 1997. During the study period, the dominant fish species were Cleisthenes pinetorum herzinsteini, Lophiomus setigerus and Pseudosciaena polyactis. These three low temperature water species accounted for
of the total catches. The percentage of the low temperature water species was high in the Yellow Sea and the coastal area on the continental shelf of the East China Sea but was low in the vincinity of Kyushu during the study period. In the East China Sea, the isotherm of
at 50m, mid layer depth, was located more southeast in 1996 than in 1997. The bottom water temperature was about it lower in 1996 than in 1997. The direction of the detided current on the continental shelf of the East China Sea was southward in 1996 and northward in 1997. Yellow Sea Bottom Cold Water (YSBCW) strongly expanded to south in 1996 when the northward current was weak. But, Tsushima Warm Current (TSWC) strongly intruded into the continental shelf of the East China Sea in 1997. As YSBCW expanded strongly to south in 1996, the percentage of the low temperature water species relative to the total catches was high. But, TSWC strongly intruded and the percentage of low temperature water fishes was low in 1997.
Comparative Chemiluminescent Response of Phagocytes from Peripheral Blood, Head Kidney and Spleen of the Cultured Rockfish (Sebastes schlegeli)
Kim Ki Hong ; Hwang Yoon Jung ; Cho Jae Bum ; Kwon Se Ryun ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 23~25
To compare the respiratory burst activity potential of the phagocytes isolated from head kidney, spleen, and peripheral blood 1ll cultured rockfish (Sebastes schlegeli), chemiluminescent (CL) response analysis was performed. The phagocytes isolated from peripheral blood showed greater and faster CL response to the opsonized zymosan compared to that of the phagocytes isolated from kidney or spleen. This may imply a significant role of the blood phagocytes in defence mechanism of rockfish. The different responses found in the CL analysis among the phagocytes isolated from peripheral blood, kidney, and spleen may reflect differences in activation state or activity of phagocytes.
Toxic Algal Bloom Caused by Dinoflagellate Alexandrium tamarense in Chindong Bay, Korea
Yoo Jong Su ; Fukuyo Yasuwo ; Cheun Byeungsoo ; Lee Sam Geun ; Kim Hak Gyoon ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 26~32
Monospecific red tide by a toxic dinoflagellate belonging to the genus Alexandrium occurred at Chindong Bay in the southern coast of Korea and continued from April 6th to 15th in 1997. The ratio of its cell number to total phytoplankton cell number was much higher than
. This organism was identified as Alexandrium tamarense, although slight morphological differences were found comparing to the original and successive descriptions of the species. We found neither anterior nor posterior attachment pores in these cells of the bloom population. The occurrence of red tide caused by A. tamarense was first reported in Korea. Its plate formula is Po, Pc, 4', 6"c, 8s, 5"' and 2"". Thecal plates are thin with pore-like ornamentation. In those plates, the anterior part of the first apical plate (1') is narrower and its posterior end has sometimes a block-like accessory, but this variation was considered within the range of the morphological variability of this taxon. The cell density during the red tide exhibited a wide range of variation by the depth of water column, ranging from
. Water temperature varied from 11.8 to
. Toxicity of A. tamarense during red tide was measured as
by mouse bioassay.
A New Record of an Emmelichthyid Fish, Emmelichthys struhsakeri Heemstra and Randall (Perciformes, Pisces) from Korea
Kim Jin Koo ; Ryu Jung Hwa ; Kim Yong Uk ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 33~36
One specimen of Emme1ichthys struhsakeri Heemstra and Randall belonging to the family Emmelichthyidae was collected for the first time from Cheju island, Korea. E. struhsakeri is similar to Erythroc1es schlegelii, but differs in some morphological characters: the presence of the keel on the caudal peduncle region, the presence of the three isolated short spines between spinous and soft dorsal fins.
Actions of a Gonadotropin-Releasing Hormone Antagonist on Gonadotropin II and Androgenic Steroid Hormone Secretion in Precocious Male Rainbow Trout
Kim Dae-Jung ; Han Chang-Hee ; Aida Katsumi ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 37~43
We used a mammalian GnRH antagonist,
-GnRH, to examine the details of the salmon type gonadotropin-releasing hormone (sGnRH) and GnRH agonist analog
[d-Ala^6]-ethylamide GnRH; GnRHa) functions in the control of maturational gonadotropin (GTH II) secretion, in precocious male rainbow trout, in both in vivo and in vitro experiments. In the in vivo study, plasma GTH II levels increased by sGnRH or GnRHa treatment, but the response was more rapid and stronger in the GnRHa treatment group. The increase in GTH II was significantly suppressed by the GnRH antagonist, while the antagonist had no effect on basal GTH II levels in both groups. The GnRH antagonist showed stronger suppression of GTH II levels in the sGnRH treatment fish than in the GnRHa treatment fish. In addition, plasma androgenic steroid hormones (testosterone and 11-ketotestosterone) increased by the sGnRH or GnRHa treatment. The GnRH antagonist significantly inhibited the increases in plasma androgenic steroid hormone levels stimulated by the sGnRH or GnRHa, while the antagonist had no effect on basal androgenic steroid hormone levels in both groups. In the in vitro study, treatment with sGnRH or GnRHa increased GTH II release from the cultured dispersed pituitary cells, but the response was stronger in the GnRHa treatment group. The increase in GTH II release by GnRH was suppressed by adding the GnRH antagonist, dosedependently. On the other hand, basal release of GTH II did not decrease by the GnRH antagonist treatment in both groups. These results suggest that the GnRH antagonist,
, used in this study is effective in blocking the action of GnRH-induced GTH II release from the pituitary gland both in vivo and in vitro.
Property Changes of Salt-seasoned Salmon Roe during Fermentation
Kim Sang Moo ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 44~48
In order to utilize chum salmon returned in the east coast of Korea, the changes in the properties of Yeonual-jeot (salted salmon roe) fermented at different temperatures were measured for obtaining the basic data for its commercial production. Moisture content of salted salmon roe was significantly lower than raw salmon roe, while other proximate components were in the reverse. pH was constant for 56 days fermentation at
, but decreased with fermentation Reriod at 10 and
. The contents of amino-nitrogen and VBN were almost in constant at
up to 28 days of fermentation, but increased very slowly at
and moderately at
. TBA value, and the numbers of total viable cells and lactic acid bacteria increased over all fermentation periods, more at higher fermentation temperatures.
Relationship between Viral Propagation and Apoptosis after Marine Birnavirus (MABV) Infection
Kim Yeong Jin ; Choi Won Chul ; Kim Hyeung Rak ; Jung Sung Ju ; Jung Tae Sung ; Kim Jae Ho ; Yeo In Kyu ; Oh Myung Joo ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 49~51
This study was performed to confirm the relationship between viral propagation and apoptosis by the infection of marine birnavirus strain (MABV NF-4) on chinook salmon embryo (CHSE-214) cells. After 6 hr viral infection, MABV was detected by PCR method. Also, as a result of DNA assay on the cells, MABV infection resulted in a typical feature of apoptosis, DNA fragmentation. The results suggest that MABV replicated to high concentrations during the early stage of infection induces apoptosis.
Characterization of a Substance from Photobacterium damsela subsp. piscicida that Non-specifically Binds to Streptavidin
Jung Tae Sung ; Kim D. Thompson ; Adams Aelexandra ; Oh Myung Joo ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 52~63
Non-specific reaction has been a problem in doing, especially, research and diagnosis for infectious agents. Avidin-biotin-peroxidase complex (ABC) techniques has widely been used to amplify a reaction. Photobacterium damse1a subsp. piscicdia (formerly Pasteurella piscicida) exhibited a capacity to bind with streptavidin non-specifically. The band, estimated 26 K Da in Western blotted paper, was blocked with biotin but incompletely. In an attempt to explore an involvement of the non-specific substance in attaching piscine cells, cell attachment test performed using anti- Ph. d. subsp piscicida sera raised mouse and rabbit exhibited slightly blocking effects for Mediterranean (1736) and significantly for Japanese (Sp 92144) isolate. Biotin decreased the attachment ability significantly for Sp92144 but it was not effective to 1736. Both isolates showed greatly enhanced attachment ability with poly-L-lysin. The non-specific binding substance was contained in bacterial extracellular products (ECPs). The substance was able to purified with 2-imminobiotin affinity column, the purified substance appeared to have 4 bands in silver staining, and had a carbohydrate branch. This purified substance showed cytotoxic effects selectively between 5 piscine cell lines. Moreover, it stimulated rainbow trout macrophage in terms of reduction of cytochrome cas well as yeast phagocytosis, significantly.
The 16S rDNA Gene Sequencing and Specific Probes Designing for the Identification of Edwardsiella tarda
Lee Ju Suk ; Choi Jae Young ; Sim Doo Saing ; Kim Hyeung Rak ; Jung Tae Sung ; Kim Jae Ho ; Oh Myung Joo ;
Fisheries and aquatic sciences, volume 3, issue 1, 2000, Pages 64~70
DNA probes for the l6S rRNA have been designed for the detection of Edwardsiella tarda. In order to accomplish this purpose, the l6S rRNA gene from E. tarda has been cloned and sequenced. Two highly feasible oligonucleotide probe sites have been determined by the database analysis programs presented by PCGENE and BLAST. These two probes have been evaluated by slot blot hybridization analysis. Hetero- and homo-trimeric templates have been synthesized using these two probe sites. The templates have been further multimerized by PCR to generate between 150 and 300 bp long DIG-11-dUTP labeled probes. Unlike 3' end labeled oligonucleotide probes or templates, multimerized probes showed no crosshybridization in the given experimental condition. Furthermore, a significant increase in sensitivity has been observed with these probes. This method, we presented here, may be useful for the designing of probes for the detection of other fish pathogenic microorganisms also.