Go to the main menu
Skip to content
Go to bottom
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 41, Issue 6 - Dec 2008
Volume 41, Issue 5 - Oct 2008
Volume 41, Issue 4 - Aug 2008
Volume 41, Issue 3 - Jun 2008
Volume 41, Issue 2 - Apr 2008
Volume 41, Issue 1 - Feb 2008
Selecting the target year
Changes in Prolactin and Growth Hormone Gene Expression in Three Freshwater Teleosts with Rapid Changes in Salinity
Park, Woo-Dong ; Lee, Cheul-Ho ; Kim, Dae-Jung ; Sohn, Young-Chang ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 1~6
DOI : 10.5657/kfas.2008.41.1.001
The changes in osmolality and the gene expression profiles of prolactin (PRL) and growth hormone (GH) with rapid changes in salinity were compared in the eel (Anguilla japonica), crucian carp (Carassius carassius), and masu salmon (Oncorhynchus masou). Fish stocked in freshwater (FW) were abruptly transferred to experimental tanks containing FW, 50% seawater (50% SW), or 100% SW (SW). Blood samples and pituitary glands were collected 2 and 24 hrs after the exposure. No mortality was observed in SW eel (n=6), whereas all of the crucian carp (n=6) and two masu salmon (n=6) exposed to SW died after land 24 hrs, respectively. The PRL mRNA levels of the eel and masu salmon decreased in 50% SW and SW compared to those of the fish kept in FW after 24 hrs, whereas the PRL levels of crucian carp were higher in 50% SW than in FW. Unlike the PRL mRNA levels, the GH mRNA levels of the eel did not differ significantly among three different salinities, while the GH mRNA levels of crucian carp and masu salmon increased significantly in 50% SW and SW after 24 hrs. The serum osmolalities increased marginally in the eel and masu salmon in 50% SW at 24 hrs (19% and 9%, respectively), whereas those of crucian carp increased abruptly in 50% SW (50% increase). These results suggest that the synthesis of PRL and GH is important in relation to the osmoregulatory system with environmental changes in salinity.
UV Protection and Whitening Effects of Collagen Isolated from Outer Layer of the Squid Todarodes pacificus
Kwon, Min-Chul ; Qadir, Syed Abdul ; Kim, Hyo-Sung ; Ahn, Ju-Hee ; Cho, Nam-Hyun ; Lee, Hyeon-Yong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 7~12
DOI : 10.5657/kfas.2008.41.1.007
To develop a whitening agent, cytotoxicity of the soluble collagen isolated from Todarodes pacificus (CIT) was evaluated. CIT tested for cytotoxicity on human dermal fibroblast (CCD-986sk) was exhibited very low cytotoxicity. Because tyrosinase is the key enzyme for melanin biosynthesis, the use of various tyrosinase inhibitors is a common practice for whitening purpose in cosmetics. Tyrosinase inhibitory activity and melanin production assay were measured to confirm the whitening effect. The inhibitory effect of MMP-1 in UV-irradiated human dermal fibroblast was also performed. CIT showed strong inhibition potency on tyrosinase by 51.5% at 0.2 mg/mL which increased the inhibition by increasing the concentration of CIT, and showed 69.1% inhibition at 1.0 mg/mL. CIT showed strong inhibition effect on melanin production with 82% at 1.0 mg/mL. The CIT also reduced about 76% expression of MMP-1 in UV-irradiated CCD-986sk cell at 1.0 mg/mL. From the preliminary observations, we suggest that the collagen isolated from CIT could be a potential source of natural skin-whitening and anti-aging agents for the photo-damaged skin.
Extraction Methods for Recovering Malachite Green and Leucomalachite Green
Bae, Jin-Han ; Yun, Young-Soo ; Yoon, Sung-Ho ; Choi, Kwang-Jin ; Lee, Jeong-Seon ; Lim, Chi-Won ; Kim, Yeon-Kye ; Park, Hee-Yeon ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 13~19
DOI : 10.5657/kfas.2008.41.1.013
Malachite green (MG), a triphenylmethane dye, is carcinogenic, mutagenic, teratogenic, a respiratory toxin, and causes chromosomal fractures. It is not permitted for use as an aquaculture veterinary drug in a number of countries. Sensitive extraction methods for MG and leucomalachite green (LMG), which have long residence times in fish tissues, were developed. For LMG, the average recovery of liquid extraction (LE) ranged from 41.71 (yellowtail) to 71.60% (snakehead); the recovery of liquid-liquid extraction (LLE) was between 67.68 (yellowtail) and 83.68% (snakehead); and the average recovery of solid-phase extraction (SPE) ranged from 84.16 (yellowtail) to 92.92% (shrimp). The recovery of MG was less than 30% with SPE. However, the dye is found primarily as the colorless reduced leuco form in fish tissues.
Pathogenicity of Iridovirus against Marine Fish and Its Detection in Culturing Seawater
Jeong, Joon-Bum ; Jeong, Hyun-Do ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 20~25
DOI : 10.5657/kfas.2008.41.1.020
The susceptibility of five different marine fish to iridovirus IVS-1 infection was analyzed and found a higher the cumulative mortality in the order of rock bream (Oplegnathus fasciatus), red sea bream (Pagrus major), sea perch (Lateolabrax sp.), rockfish (Sebastes schlegeli) and black porgy (Acanthopagrus schlegeli). However, the concentrations of virus in the infected spleens of these species did not differ significantly. To determine the release of iridovirus from infected fish into culturing seawater, rock bream were challenged with iridovirus IVS-1 and the concentration of virus in the water was analyzed using PCR. Over the 10 days of the analysis, the linear relationship between the number of dead fish and viral DNA concentration found in culturing seawater should be considered direct evidence of horizontal iridovirus transmission.
Feeding Habits of Chub Mackerel (Scomber japonicus) in the South Sea of Korea
Yoon, Seong-Jong ; Kim, Dae-Hyun ; Baeck, Gun-Wook ; Kim, Jae-Won ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 26~31
DOI : 10.5657/kfas.2008.41.1.026
The feeding habits of chub mackerel (Scomber japonicus) were studied based on an examination of the stomach contents of 512 specimens collected between November 2005 and October 2006 in the South Sea of Korea. The specimens ranged in fork length (FL) from 23.4-37.5 cm. Chub mackerel is a piscivore and consumes mainly Teleosts such as Engraulis japonicus. Its diet also includes amphipods, crabs, Euphausia, chaetognaths and shrimp. Smaller individuals (<26 cm FL) consume mainly crabs. The proportion of these prey items decreases with increasing fish size, and this decrease paralleles the increased consumption of fish. The prey size increases with S. japonicus size.
Feeding Habits of Sebastes thompsoni in the Coastal Waters off Busan, Korea
Huh, Sung-Hoi ; Nam, Ki-Mun ; Choo, Hyun-Gi ; Baeck, Gun-Wook ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 32~38
DOI : 10.5657/kfas.2008.41.1.032
We studied the feeding habits of Sebastes thompsoni based on 421 specimens obtained in monthly collections between January and December 2005 in the coastal waters off Busan, Korea. S. thompsoni was a crustacean feeder, and consumed mainly shrimp and euphausiids. Its diet also included small quantities of amphipods, cephalopods, and fish. It showed distinct ontogenetic changes in feeding habits. Smaller individuals (14-17 cm standard length (SL)), mainly consumed euphausiids. The portion of these prey items decreased with increasing fish size, and larger individuals (>20 cm SL) consumed mainly shrimp such as Leptochela sydniensis.
Fluctuation in the Abundance and Species Composition of Fishes Collected by a Fyke Net in the Coastal Waters of Geumo-do, Yeosu
Hwang, Jae-Ho ; Yoo, Kyoung-Hee ; Lee, Sung-Hoon ; Han, Kyeong-Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 39~47
DOI : 10.5657/kfas.2008.41.1.039
The fluctuation in the abundance and species composition of fish was investigated using a fyke net with entrances on both sides in the coastal waters of Geumo-do, Yeosu, Chollanam-do, Korea, from May 2003 to April 2004. A total of 2,379 fishes (392.13 kg) were sampled and classified into 11 orders, 34 families, and 53 species. The dominant orders were Perciformes, Scorpaeniformes, and Pleuronectiformes, which accounted for 67.9% of the collected fishes. The dominant species was Acanthopagrus schlegelii (235 individuals, 19.00 kg), followed by Konosirus punctatus (182 individuals, 9.53 kg), and Apogon lineatus (161 individuals, 1.69 kg). The number of individuals and biomass were higher in spring and summer than in winter, and the monthly variation may be related to the water temperature. The diversity index was highest in September (H'=2.9) and lowest in December (H'=1.8). The evenness index was highest in August (J=0.9) and lowest in December (J=0.7). The dominance index was highest in December (D=0.7) and lowest in August (D=0.2). The economically important species in this area are Acanthopagrus schlegelii, Konosirus punctatus, Lateolabrax maculatus, Argyrosomus argentatus, Trichiurus lepturus, Lateolabrax japonicus, and Sebastes schlegelii.
Behavioral Characteristics of Black Seabream Acanthopagrus schlegeli in Yeosu Waters During Winter
Kang, Kyoung-Mi ; Shin, Hyeon-Ok ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 48~53
DOI : 10.5657/kfas.2008.41.1.048
Twelve black seabreams (Acanthopagrus schlegeli) were tagged with acoustic transmitters and their movement and behavior patterns were tracked using acoustic telemetry from 12 December 2006 to 15 August 2007. Seven of the 12 fish stayed within 500 m of the release point for over a month. In the spring tide, the number of detected signals and swimming depth of tagged fish changed at 12-hour intervals with the ebb tide. The number of detected signals of tagged fish decreased dramatically with the passage of time and had decreased by over 80% in May 2007, compared with January 2007.
Zooplankton Biomass and Size Estimation Using a Multi-frequency Acoustic System
Hwang, Bo-Kyu ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 54~60
DOI : 10.5657/kfas.2008.41.1.054
High- and multi-frequency acoustic systems can measure a zooplankton patch successively and estimate the spatial distribution and abundance of zooplankton according to size using a multi-frequency inversion (MFI) method. This study measured zooplankton distribution to a depth of 150m using a multi-frequency acoustic system (TAPS-6), installed on a CTD system with a fluorometer and analyzed it using the MFI method. Simultaneously, zooplankton samples were collected by north pacific standard (NORPAC) net to confirm the species composition. The results showed that the combined method is valuable for estimating the zooplankton profile in detail and investigating the relationship between the zooplankton and phytoplankton profiles.
Acoustic Estimates of Anchovy Biomass along the Tongyoung- Namhae Coast
Kim, Joo-Il ; Yang, Won-Seok ; Oh, Taeg-Yun ; Seo, Young-Il ; Kim, Sung-Tae ; Hwang, Doo-Jin ; Kim, Eun-Ho ; Jeong, Sun-Beom ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 61~67
DOI : 10.5657/kfas.2008.41.1.061
Acoustic technology is commonly used to estimate the biomass and distribution of fisheries resources in coastal areas and the open ocean. Acoustic surveys were conducted on 24-26 May and 20-21 June, 2005, and 15-18 June and 27-30 July, 2006, near the Tongyoung, Geojae, and Namhae anchovy fishing grounds using a dual beam echo sounder. Information was obtained on the distributions of adult and juvenile anchovy (depth and position). We calculated and compared anchovy biomass using simple summation. In this study, all backscatter was attributed to anchovy. We assumed that the average target strength of anchovy was -70 dB and the average body weight was 3 g in May and June 2005, and that the target strength of anchovy was -65 dB and the average body weight was 5 g for pelagic individuals in July 2006. The anchovy biomass in May 2005 was estimated to be 0.147 million tons using the traditional method, while using the summation method, the estimated anchovy biomass was 0.062 million tons in June 2005, 0.21 million tons in June 2006, and in 0.43 million tons in July 2006.
Effects of Several Seaweed Extracts on the Viability of Human Keratinocyte HaCaT Cells
Yoon, Seung-Je ; Cho, Yeon-Sook ; Nam, Ju-Hyun ; Lee, Hyung-Ho ; Kim, Eliya ; Hong, Yong-Ki ;
Korean Journal of Fisheries and Aquatic Sciences, volume 41, issue 1, 2008, Pages 68~72
DOI : 10.5657/kfas.2008.41.1.068
The cellular viability of the human keratinocyte cell line HaCaT was compared after adding seaweed extracts to the culture medium. The viability was measured using a quick, quantitative, spectrophotometric crystal violet inclusion method. Of 36 common seaweed species tested, methanol extracts from Sargassum sagamianum and Gigartina tenella enhanced the viability of HaCaT cells by 1.6-fold, as compared to control cells, while methanol extracts from Dictyota dichotoma, Pachymeniopsis elliptica, and Enteromorpha linza decreased the viability to less than half that of controls.