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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
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Volume & Issues
Volume 47, Issue 6 - Dec 2014
Volume 47, Issue 5 - Oct 2014
Volume 47, Issue 4 - Aug 2014
Volume 47, Issue 3 - Jun 2014
Volume 47, Issue 2 - Apr 2014
Volume 47, Issue 1 - Feb 2014
Selecting the target year
Comparison of the Food Quality of Freshwater Rainbow Trout Oncorhynchus mykiss Cultured in Different Regions
Kang, Sang In ; Kim, Ki Hyun ; Lee, Jun Kyu ; Kim, Yong Jung ; Park, Su-Jin ; Kim, Min Woo ; Choi, Byeong Dae ; Kim, Dongsoo ; Kim, Jin-Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 103~113
DOI : 10.5657/KFAS.2014.0103
This study compared the food quality of freshwater rainbow trout Oncorhynchus mykiss cultured (in Pyeongchang, Pyeongtaek, Jecheon and Geochang) with that of imported salmon Oncorhynchus keta. The proximate composition of the four types of rainbow trout was 74.4-75.7% moisture, 18.3-19.4% crude protein, 3.1-4.3% crude lipid, and 1.3-1.7% ash. There were slight differences in the proximate composition of the four types of rainbow trout. No significant (P>0.05) differences were found in the red color and odor and taste intensities of the four types of rainbow trout based on the Hunter a values, volatile basic nitrogen content, odor intensity using an electronic nose and taste intensity using an electronic tongue. The crude protein, total amino acid, and mineral contents of rainbow trout cultured in Pyeongtaek were superior or similar to those of the trout cultured in the other three places. The rainbow trout cultured in Geochang had the highest hardness, at 858.5 g.
Food Quality of Rainbow Trout Oncorhynchus mykiss Domesticated in Seawater
Kim, Ki Hyun ; Kang, Sang In ; Jeon, You-Jin ; Choi, Byeong Dae ; Kim, Min Woo ; Kim, Dongsoo ; Kim, Jin-Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 114~121
DOI : 10.5657/KFAS.2014.0114
This study compared the food quality of domesticated(RT-DS) and freshwater (RT-F) rainbow trouts Oncorhynchus mykiss. The proximate composition of RT-DS was 73.8% moisture, 20.6% crude protein, 4.2% crude lipid, and 1.1% ash and was similar to RT-F. No differences were found in the red color, odor and taste intensities, calcium, and potassium between RT-DS and RT-F based on the Hunter a values, volatile basic nitrogen content, odor intensity and using an electronic nose, and taste intensity using an electronic tongue. The crude protein, total amino acid contents, and taurine, glutamic acid, glycine, alanine and anserine contents in free amino acids were higher in RT-DS than in RT-F. There was no difference in hardness between RT-DS and RT-F.
Biological Activities of Acidic Extracts of the Starfish Asterina pectinifera
Go, Hye-Jin ; Jo, Mi Jeong ; Kim, Gun-Do ; Park, Nam Gyu ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 122~128
DOI : 10.5657/KFAS.2014.0122
The present study was performed to examine the contraction and relaxation responses of the smooth muscles, and search for antimicrobial and antioxidant activities in the tissues, of the starfish Asterina pectinifera. Frozen samples were extracted with distilled water containing 1% acetic acid. Extracts from all tissues showed potent antimicrobial activity against Escherichia coli D31. Relatively high levels of antimicrobial activity were also detected in the body extracts. Liver, tube feet, and body extracts caused contraction responses in the dorsal retractor muscles (DRM) of the starfish. In contrast, all tissues examined exhibited contractile activity in the esophagus of squid Todarodes pacificus. In addition, liver and gonad extracts caused contraction responses upon application to the intestine of the puffer fish Takifugu pardalis. Relaxation effects on the DRM of starfish were identified in most of the extracts, while no relaxant activity was detected in body extracts. Extracts from all tissues examined also exhibited antioxidant activities. The results of this study suggest that starfish are a potential source of novel bioactive compounds.
Isolation and Purification of Neuropeptides from the Tube Feet of the Starfish Asterias amurensis
Jo, Mi Jeong ; Go, Hye-Jin ; Kim, Gun-Do ; Park, Nam Gyu ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 129~134
DOI : 10.5657/KFAS.2014.0129
Two neuropeptides were purified from the acidified tube feet extract of the starfish Asterias amurensis by C18 reversed phase and size-exclusion high-performance liquid chromatography (HPLC). The tube feet extract and the purified peptides (AST-I and AST-II) showed potent contractile activity on dorsal retractor muscle (DRM) of the starfish Asterina pectinifera and intestine (smooth muscle) of the panther puffer Takifugu pardalis. Treatment of the purified peptides with dithiothreitol (DTT) for 60 min at
significantly altered their retention times, suggesting that these compounds contained disulfide bonds. The molecular weights of AST-I and AST-II were determined to be 2064.2 Da and 6137.2 Da, respectively, by MALDI-TOF mass spectrometry.
Debittering of Enzymatic Hydrolysate Using Exopeptidase Active Fractions from the Argentina Shortfin Squid Illex argentinus Hepatopancreas
Kim, Jin-Soo ; Kim, Min Ji ; Kim, Ki Hyun ; Kang, Sang In ; Park, Sung Hwan ; Lee, Hyun Ji ; Heu, Min Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 135~143
DOI : 10.5657/KFAS.2014.0135
Exopeptidase active fractions from the hepatopancreas of the Argentina shortfin squid Illex argentinus, were obtained with acetone (AC 30-40%), ammonium sulfate (AS 60-70% saturation), anion exchange chromatography (AE-II, 0.2 M NaCl) and gel filtration chromatography (GF-I, 30-50 kDa) fractionation methods. A bitter peptide solution that has a bitterness equivalent to that of 2% glycylphenylalanine and prepared by tryptic hydrolysis of milk casein, was treated with the exopeptidase active fractions. The GF-I fraction was the best based on aminopeptidase activity (35.3 U/mg), percentage of recovery (30.7%) and a sensory evaluation (1.7). The amount of released amino acids increased as incubation time increased, and the bitterness of the enzyme reaction mixtures decreased. Incubation with the GF-I fraction for 24 h resulted in the hydrolysis of several peptides as revealed by the reverse-phase high performance liguid chromatography profile, with three peaks (3, 5 and 6) decreasing in area (%) and three peaks (1, 2 and 4) increasing in area (%). Therefore, the GF-I fraction appeared to be ideally suited to reduce bitterness in protein hydrolysates by catalyzing the hydrolysis of bitter peptides.
Effect of Culture Conditions on Characteristics of Growth and Production of Docosahexaenoic acid (DHA) by Schizochytrium mangrovei
Jeong, U-Cheol ; Choi, Byeong-Dae ; Kang, Seok-Joong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 144~153
DOI : 10.5657/KFAS.2014.0144
Both docosahexaenoic acid (DHA, 22:6n-3) and eicosapentaenoic acid (EPA, 20:5n-3) have attracted increasing attention since the first epidemiological report on the importance of n-3 essential fatty acids. Lipids in microbial cells play various biological roles and, consequently, much research has been carried out on their role in cell physiology. The lipid composition of microorganisms can exhibit considerable variations depending on environment. The effects of culture conditions, temperature (15, 20, 24, 28, 32 and
), salinity (10, 20, 30, 40 and 50 psu), pH (pH5, 6, 7, 8 and 9), rotation speeds (50, 100, 150 and 200 rpm), carbon sources, nitrogen sources and C/N ratio on the production of docosahexaenoic acid, fatty-acid profiles, and acids secreted to the broth culture by the oleaginous microorganism, Schizochytrium mangrovei (KCTC 11117BP), were studied. Temperature (initially
), salinity (20 psu), pH (pH7), rotation speeds (100 rpm), organism fatty acids, and secreted acids in the broth were varied during cultivation of S. mangrovei. At pH 7.0, S. mangrovei was able to accumulate lipids up to 40% of its biomass, with 13% (w/w) DHA content. The monosaccharides glucose and fructose, and yeast extract were suitable carbon and nitrogen sources, respectively. The primary omega-3 polyunsaturated fatty acid produced was docosahexaenoic acid.
Survival and Growth in Juvenile Abalone Haliotis discus hannai to Ocean Acidification and Elevated Temperature
Lee, Kyoung-Seon ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 154~159
DOI : 10.5657/KFAS.2014.0154
The increasing of atmospheric
are changing the pH (ocean acidification) and temperature of the sea. Although the effects of ocean acidification on calcifying organisms have well-documented, only a few studies have examined the combined effects of ocean acidification and elevated temperature. This study investigated the effects of ocean acidification and elevated temperature for 2100 on survival and growth of juvenile abalone, Haliotis discus hannai. Ocean acidification was simulated by bubbling
into seawater at concentrations of 1,000 and 1,500 ppm, and temperature was set at room temperature
nor temperature had a significant effect on survival of abalone, while both significantly affected growth. There was no significant interaction between the two factors. Shell length can be used as a growth index of abalone to access the impacts of ocean acidification and elevated temperature.
Feeding Habits of Tridentiger bifasciatus in the Tidal Creek at Sangnae-ri, Suncheon, Korea
Ye, Sang Jin ; Jeong, Jae Mook ; Kim, Hyeon Ji ; Park, Joo Myun ; Huh, Sung-Hoi ; Baeck, Gun Wook ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 160~167
DOI : 10.5657/KFAS.2014.0160
The feeding habits of Tridentiger bifasciatus were studied using 733 individuals collected in the tidal creek at Sangnae-ri, Suncheon, Korea, using a push net, monthly, from April 2011 to March 2012. The standard length (SL) of the specimens ranged from 1.5 to 8.2 cm. The stomach content analysis indicated that T. bifasciatus consumed mainly amphipods, such as Corophium sp., while copepods, polychaetes, and shrimps were other important prey species. In addition T. bifasciatus ate small quantities of crab larvae, fish, gastropod larvae, and insects. T. bifasciatus is a generalist that feeds on various zoobenthos, including fish. T. bifasciatus underwent an ontogenetic dietary shift. Smaller individuals (1-2 cm SL) fed mainly on amphipods. The proportion of amphipods decreased as body size increased, whereas the consumption of polychaetes increased gradually. The seasonal variation in the diet composition of T. bifasciatus was significant. Insects were common prey during summer, while the amounts of other prey, including polychaetes, were similar during spring, autumn, and winter.
Effects of Critical Minimum Depth in the Coastal Region on Storm Surges using a Three-Dimensional Numerical Experiment
Hong, Chul-Hoon ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 168~173
DOI : 10.5657/KFAS.2014.0168
The effect of critical minimum depth in the coastal region on storm surges was examined using a three-dimensional primitive equation model (POM). Case studies using numerical experiments in a small coastal bay in the southern sea of Korea (Hanam Bay) have examined the `critical depth` (CD) that stabilizes the numerical calculations. Dependence of the CD of typhoon tracks and tidal components such as M2, S2, O1, and K1 were examined. The model results clearly demonstrated that the numerically unstable state of the calculation was caused by the coarse resolution of sea surface elevation.
Myopathy in Clinically Healthy Cultured Abalone Haliotis discus hannai
Kim, Bo Seong ; Yi, Sung Joo ; Hwang, Se Myung ; Lee, Mu Kun ; Park, Young Jin ; Song, Kyo Jung ; Huh, Min Do ;
Korean Journal of Fisheries and Aquatic Sciences, volume 47, issue 2, 2014, Pages 174~178
DOI : 10.5657/KFAS.2014.0174
In this study, 6-10 clinically healthy farmed abalone, Haliotis discus hannai were obtained from Jeollanam-Do Wando Soan-myeon, Bogil-myeon, and Nohwa-eup monthly for 1 year 7 months and were examined histopathologically. As a result, the adductor muscle had severe cellular swelling and myonecrosis. These lesions were stained with hematoxylin and eosin and Giemsa. The lesions were not caused by infection of bacteria or parasites. We investigated the relationship between lesion frequency and water temperature and discovered that increased water temperature was associated with increasing lesion frequency. As water temperature is related to growth rate, increased growth rate was closely related to increased lesion frequency. We considered that these lesions could be a useful factor in measuring shellfish health.