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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Fisheries and Aquatic Sciences
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Journal DOI :
The Korean Society of Fisheries and Aquatic Science
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Volume & Issues
Volume 48, Issue 6 - Dec 2015
Volume 48, Issue 5 - Oct 2015
Volume 48, Issue 4 - Aug 2015
Volume 48, Issue 3 - Jun 2015
Volume 48, Issue 2 - Apr 2015
Volume 48, Issue 1 - Feb 2015
Selecting the target year
Prevention Strategies for Viral Nervous Necrosis (VNN) in Sevenband Grouper Epinephelus septemfasciatus Aquaculture Farms
Kim, Wi-Sik ; Kim, Jong-Oh ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 403~410
DOI : 10.5657/KFAS.2015.0403
Viral nervous necrosis (VNN) is a serious disease of sevenband grouper Epinephelus septemfasciatus in Korean aquaculture farms. However, we suggest the following preventative methods for hatcheries: 1) disinfecting rearing water, 2) selecting spawners via ELISA and PCR, 3) selecting eggs via PCR, 4) disinfecting fertilized eggs, and 5) proper facilities management. When these methods are implemented, nervous necrosis virus (NNV)-free fish are produced because vertical and horizontal transmission is prevented. However, horizontal transmission of NNV through rearing seawater sourced from the environment during grow-out stages in sea cages can still occur. Live NNV vaccines with a low rearing temperature or Poly(I:C) immunization are very effective at preventing horizontal transmission of NNV in rearing farms. Furthermore, even after VNN is contracted, fish mortality can be reduced by administering Poly(I:C).
Processing and Quality Properties of Olive Flounder Paralichthys olivaceus Balls Product
Yoon, Moon-Joo ; Lee, Jae-Dong ; Park, Si-Young ; Kwon, Soon-Jae ; Kong, Cheung-Sik ; Choi, Jong-Duck ; Joo, Jong-Chan ; Kim, Jeong-Gyun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 411~416
DOI : 10.5657/KFAS.2015.0411
Olive flounder Paralichthys olivaceus production has increased gradually in recent years, but prices have fallen. Thus, the development of a variety of processed foods incorporating olive flounder would help to increase the income of fishermen. This study was conducted to investigate the best method for olive flounder ball processing. Clean olive flounder were divided into five portions. Olive flounder meat (100 g with added egg white 39 g) was chopped and then mixed with 10 mL fresh cream and ingredients. The dough was molded into the shape of a ball. The olive flounder balls were then processed by two different methods. In the first method, the flounder ball was boiled in water for 3 min then vacuum-packed in polyethylene film and stored at
for 7 days. After 7 days, the ball was thawed and heated in a microwave for 2 min (Sample-1). In the second method, the ball was vacuum-packed in polyethylene film without boiling and then stored at
for 7 days before thawing and boiling in water for 3 min (Sample-2). After heating, both types of olive flounder balls were evaluated. Various factors (including the viable bacterial count, chemical composition, pH, hardness, thiobarbituric acid level, salinity, and free amino acid content) were measured, and a sensory evaluation was conducted. Based on the results of the sensory and hardness evaluations, Sample-1 was deemed to be superior to Sample-2.
Sanitary Quality Characterization of Commercial Semi-dried Conger Eel Conger myriaster and the Guideline for Controlling Quality
Choi, Jong-Duck ; Kang, Sang In ; Kim, Yong Jung ; Lee, Su Gwang ; Heu, Min-Soo ; Kim, Jin-Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 417~425
DOI : 10.5657/KFAS.2015.0417
Semi-dried conger eel Conger myriaster is considered as a health food in Korea due to its richness in vitamins, minerals, proteins and omega-3 fatty acids. This study characterize the sanitary quality of commercial semi-dried conger eel for developing high quality semi-dried products and suggested the guideline for controlling the quality. Moisture content ranged from 41.2% to 73.4% (mean: 61.5%), volatile basic nitrogen ranged from 16.1 to 93.6 mg/100 g (mean: 55.1 mg/100 g), and peroxide value ranged from 15.2 to 69.8 meq/kg. Viable cell counts ranged between 6.51 and 8.53 log CFU/g, while the Escherichia coli count ranged from undetectable to 4.6 log CFU/g. Based on these chemical and microbial findings, we suggest that provisions be established for development of high quality semi-dried conger eel as follows: 50-68% for moisture content, < 50 mg/100 g for volatile basic nitrogen content, < 60 meq/kg for peroxide value, and negative for E. coli. Among the 16 commercial semi-dried conger eel products used in this study, the standard-passed product was only GS-L.
Effect of Calcium Extracted from Salt-fermented Anchovy Engraulis japonicus on Osteoporosis in Ovariectomized SD-Rats
Moon, Ji-Young ; Cho, Eun-Ji ; Joo, Seong-Je ; Park, Jong-Hoon ; Yoon, Sung-Ho ; Kim, Man-Do ; Kim, Young-Man ; Hyun, Sook-Kyung ; Lim, Eun Seo ; Kim, Tea Hoon ; Son, Byung-Yil ; Kwon, Hyun-Ju ; Kim, Byung-Woo ; Lee, Eun-Woo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 426~431
DOI : 10.5657/KFAS.2015.0426
This study examined the effect of calcium (AC) extracted from salt fermented anchovy Engraulis japonicus on osteoporosis in ovariectomized (OVX) SD female rats. After AC treatment for 8 weeks, the body weight of the OVX-AC group decreased, while the weight of the OVX group (control) increased 43.9%. The blood osteocalcin, calcium, and ALP levels were examined as physiological markers for osteoporosis. The concentrations of all markers were elevated in the OVX-AC group compared to the OVX group. Thus, anchovy calcium is useful as an organic calcium supplement.
The Antimicrobial, Antioxidant, and Tyrosinase Inhibitory Activities of Solvent Extracts of Asterina pectinifera and Asterias amurensis
Cho, Woo-Jin ; Lee, Hyun-Hwa ; Jung, Yeon-Jung ; Kim, Hun ; Jeong, Eun-Jeong ; Park, Sihyang ; Lim, Chi-Won ; Cha, Yong-Jun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 432~438
DOI : 10.5657/KFAS.2015.0432
This study examined the antimicrobial, antioxidant, and tyrosinase inhibitory activities of bioactive compounds extracted from two starfish, Asterina pectinifera and Asterias amurensis, using solvent extraction after
hydrolysis. Methanol and acetone fractions collected by stepwise extraction from specimens were subjected to silica gel column chromatography (SGCC) (200 mesh and 400 mesh), followed by high-performance liquid chromatography (HPLC). Two fractions (7:3 and 5:5 chloroform : methanol ratio, v/v) eluted using silica gel column chromatography from the two starfishes showed higher antimicrobial activity against Propionibacterium acnes and dermatophyte fungi (Epidermophyton floccosum, Microsporum audouinii, Trichophyton ferrugineum, Trichophyton mentagrophytes, and Trichophyton rubrum), antioxidant activity (
, mg/mL), and tyrosinase inhibitory activity compared to the other fractions. The final fractions obtained from Asterina pectinifera (RT 7.53, 8.93, and 10.48 min) and Asterias amurensis (RT 5.02 min) by SGCC (400 mesh) and HPLC from two SGCC fractions (200 mesh) showed 8.94 and 15.59 mg/mL antioxidant activity (
) and 46.89 and 40.19 % tyrosinase inhibitory activity, respectively. Extracts from starfishes are potential cosmetic basic material.
Effect of Phlorotannins Isolated from the Ethyl Acetate Fraction of Ecklonia stolonifera on Peritoneal Macrophage Polarization
Choi, Min-Woo ; Choi, Jun-Hyeong ; Kim, Hyeung-Rak ; Kim, Jae-Il ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 439~446
DOI : 10.5657/KFAS.2015.0439
Inflammation is a protective response to infection or injury. However, prolonged inflammation can contribute to the pathogenesis of many diseases, such as cancer, diabetes, arthritis, atherosclerosis, and Alzheimer's disease. Recent studies have shown that activated macrophages, inflammatory effector cells, can react to tissue insults in a polarized manner, in which their phenotypes are polarized into two major subtypes, categorized as M1 or M2. Classical M1 activation involves the production of pro-inflammatory cytokines, such as interleukin (IL)-6 and tumor necrosis factor (TNF)-
, and free radicals, while M2 or alternative activation is an anti-inflammatory phenotype involved in homeostatic processes, such as wound healing, debris scavenging, and the dampening of inflammation via the production of very low levels of pro-inflammatory cytokines and high levels of anti-inflammatory mediators, including IL-10. As part of our ongoing effort to isolate anti-inflammatory compounds from seaweeds, we investigated the effects of phlorotannins isolated from the brown alga Ecklonia stolonifera on macrophage polarization. Mouse peritoneal macrophages were treated with various concentrations of the extracts, and real-time RT-PCR analyses were performed to examine the expression of polarization markers: IL-
, IL-6, and TNF-
for M1 and arginase-1, peroxisome proliferator-activated receptor (PPAR)-
, found inflammatory zone-1 (Fizz-1), chitinase 3-like 3 (Ym1), and
-like factor 4 (Klf-4) for M2. The pretreatment of cells with eckol, dieckol, and phlorofucofuroeckol-A (PFF-A), isolated from the ethyl acetate fraction of E. stolonifera ethanolic extract, potentiated the anti-inflammatory M2 phenotype of the macrophages. These results indicate that phlorotannins derived from E. stolonifera can be used to enrich macrophages with markers of the M2 anti-inflammatory state.
Diversity of Cultured and Uncultured Bacteria in the Gut of Olive Flounder Paralichthys olivaceus
Kim, Ahran ; Kim, Do-Hyung ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 447~453
DOI : 10.5657/KFAS.2015.0447
We determined the optimal culture conditions for obtaining the maximum number of intestinal bacteria from the olive flounder Paralichthys olivaceus, and studied bacterial diversity using both culture-dependent and culture-independent methods. Using six culture conditions, mean bacterial numbers were greater than
per gram of gut mucus, regardless of the medium. However, the bacterial diversity, based on colony morphology, appeared much higher on Marine agar (MA) and Zobell 2216 agar than on other media. We found eight and 17 cultured bacterial phylotypes with 99% minimum similarity in gut mucus grown on MA and tryptic soy agar, respectively. Furthermore, we used genomic DNA extracted from gut mucus to generate 78 random clones, which were grouped into 25 phylotypes. Of these, six were affiliated with Firmicutes, Actinobacteria, and Verrucomicrobia, and were not found using our culture-dependent methods. Consequently, we believe that Marine agar and Zobell 2216 agar are optimal media for culturing diverse intestinal microbes; we also discovered several novel sequences not previously recognized as part of the gut microbiota of olive flounder.
Dietary Supplementation of Citrus and Fermented Citrus By-product for Juvenile Red Seabream Pagrus major at Low Water Temperature
Lee, Chorong ; Kim, Youjeong ; Lee, Kyeong-Jun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 454~458
DOI : 10.5657/KFAS.2015.0454
This study compared the effects of dietary supplementation of citrus by-product (CBP) and CBP fermented with Bacillus subtilis (F-CBP) on growth performance, feed utilization, intestinal histology and innate immunity of red seabream Pagrus major with three commercial immune-boosting products. The six experimental diets were supplemented with L-ascorbyl-2-polyphosphate (LAPP; the control diet), CBP or F-CBP at a concentration of 100 mg vitamin C equivalent/kg diet or one of three commercial immune boosters. The Experimental diets were fed to triplicate groups of 17 fish (initial body weight, 116 g) for 8 weeks. The water temperature during the feeding trial was maintained at
. Growth and feed utilization did not differ significantly among the six dietary treatments, nor did the phagocytic activity, superoxide dismutase or total immunoglobulin concentrations. However, myeloperoxidase activity was significantly higher in the CBP groups. For the intestinal histology, the intestine diameter, villi and enterocyte heights and number of goblet cells did not differ significantly among groups. Therefore, CBP or F-CBP can be used as a valuable eco-friendly byproduct in diets for fishes including red seabream to maintain their normal growth and health.
Enzyme-linked Immunosorbent Assays (ELISA) and Immunochromatography Assays (ICG) for Analysis of Vitellogenin in the Scorpion Fish Sebastiscus marmoratus
Yeo, In-Kyu ; Lim, Yoon-Kyu ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 459~465
DOI : 10.5657/KFAS.2015.0459
We tested biomarker systems [enzyme-linked immunosorbent assay (ELISA) and immunochromatography assay (ICG) kits] for the screening of endocrine-disrupting chemicals in contaminated environments using antibodies resulting from
-Estradiol-induced vitellogenin (Vtg) in the wild scorpion fish Sebastiscus marmoratus. Monoclonal antibodies of two clones (S28 and S15) were used as capture and tracer antibodies for ELISA and ICG assays. ELISA detected Vtg at levels greater than
, while ICG detected Vtg at levels greater than
. However, the ICG system was able to detect antibodies from
-Estradiol-induced Vtg serum that had been diluted 1,000 times. Our results suggest that previously developed biomarker assays can be used as detection systems to detect known endocrine-disrupting chemicals in contaminated environments, and to measure their activity.
Growth and Physiological Effects of Immunity Feed Additives on the Juvenile Red Sea Cucumber Stichopus japonicus
Namgung, Jin ; Ahn, Kyoung-Jin ; Yeo, In-Kyu ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 466~473
DOI : 10.5657/KFAS.2015.0466
The juvenile red variant of the sea cucumber Stichopus japonicus is distributed worldwide. It is a valuable food source in Korea, China, and Japan. Major issues in farming the juvenile red variant sea cucumber include growth rates and disease resistance. In recent years, studies have focused on feed additives to enhance immune system and health. In this study, we used a common diet (CD), a nutritional diet (ND; mixed nutritional supplements), and an immunity diet (ID; mixed probiotics, spirulina, and levan) and compared the growth rates and immunity of juvenile red variant sea cucumbers fed the experimental diets for 12 weeks. The growth and survival rates in the ID group were significantly increased (P>0.05). This suggests that the feed additives positively influenced immunity and growth in the ID group. However, the immune activity was exhibit a stabilizing effect, and further investigation of immune effects is required.
Morphological Analysis of Patterns of Deformities and Multiple Symptoms in Cultured Blackhead Seabream Acanthopagrus schlegeli Juveniles
Kim, Yang-Su ; Go, Hyun-Jung ; Lee, Si-Woo ; Jeong, Gwan-Sik ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 474~482
DOI : 10.5657/KFAS.2015.0474
This study aims to investigate the patterns and incidence rates of morphological deformities during artificial fingerling production of blackhead seabream (BSB, Acanthopagrus schlegeli) juveniles by visual and soft X-ray observations of BSB juveniles (n=881) collected from four industrial hatcheries. Using both methods, we observed seven types of external deformity (
) and eight types of skeletal deformity (
). Lordosis occurred in all hatcheries with the highest frequency and the mean frequency was
(24.5% in total abnormal) by soft X-ray. Although they had a similar standard length (SL), juveniles with lordosis had a significantly lower condition factor and body weight than normally developed juveniles (P<0.05); normal distribution curves of histogram of body proportions, i.e., body height (BH)/head length (HL) and trunk (=SL-HL)/BH, indicated differences between normally developed juveniles and those with lordosis. In addition, 59% of juveniles with lordosis had vertebral curvature of less than
, generally at the
vertebrae. It is expected that the above results will be used as basic data necessary for determining the cause of lordosis and for developing techniques to prevent this symptom in the fingering production industry of BSB juveniles.
Steroid Metabolism in the Blackfin Flounder Glyptocephalus stelleri during Oocyte Maturation
Lee, Hae Won ; Baek, Hea Ja ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 483~488
DOI : 10.5657/KFAS.2015.0483
We studied oocyte steroidogenesis in the blackfin flounder Glyptocephalus stelleri as a region-specific species, in the East Sea of Korea during the spawning season. Maturing oocytes (0.76, 0.82, 0.88, and 0.91 mm in oocyte diameter) were incubated in vitro in the presence of [
-OHP) as a precursor. Steroid metabolites were extracted from the incubated medium and oocytes, and the extracts were separated and identified by thin-layer chromatography (TLC), high-performance liquid chromatography (HPLC) and gas chromatographymass spectrometry (GC/MS). The major metabolites produced from
-OHP were androgens [androstenedione (A4) and testosterone (T)] and estrogens [
-estradiol (E2) and estrone (E1)] and progestins [
)] in maturing oocytes. The metabolic rate of
was elevated (29.04%) in oocytes measuring 0.88 mm (nucleus migration stage following the induction of germinal vesicle breakdown), but was very low in oocytes measuring 0.76, 0.82, and 0.91 mm (0.42, 0.67, and 2.62%, respectively). From these results, we suggest that
acts as a maturation-inducing steroid in the blackfin flounder.
Effects of Climate-induced Variation in the Catch Distribution and Biological Characteristics of Skipjack Tuna Katsuwonus pelamis in the Western and Central Pacific Ocean
Kim, Eunjung ; Moon, Daeyeon ; Kim, Suam ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 489~497
DOI : 10.5657/KFAS.2015.0489
To reveal the spatial and temporal variability in the distribution, growth, and maturation of skipjack tuna Katsuwonus pelamis in the western tropical Pacific, we compared two El
-Southern Oscillation (ENSO) signals and the sea surface temperature (SST) in the main fishing area with fishery and biological data. An index of skipjack tuna distribution was calculated using Korean purse seine fishery data from 1985 to 2003. Biological data for skipjack tuna were collected monthly from Korean catches during the 1994-2003 period. The catch was more closely related to the SST in the main fishing area than to the ENSO signals. However, cross-correlated function analysis showed delayed interactions between abiotic and biotic factors. The El
events preceded the eastward movement of the fishing center by 2-3 months. El
had a positive effect on the skipjack tuna catch, and the change in the Southern Oscillation Index (SOI) preceded the catch fluctuation by ca. 5-7 months. In addition, negative El
effects on gonad maturation and the mean length of skipjack tuna were detected with time lags of 12 and 7 months, respectively. The length frequency indicated that the regime-specific growth pattern at each discrete period seemed to be related to the ENSO.
Feeding Habits of Larval Clupea pallasii from the Nakdong River Estuary, Korea
Choi, Hee Chan ; Park, Joo Myun ; Youn, Seok Hyun ; Huh, Sung Hoi ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 498~506
DOI : 10.5657/KFAS.2015.0498
We examined the feeding habits of larval Clupea pallasii using 148 specimens collected from December 2010 to April 2011 in the Nakdong River estuary, Korea. We found that larval C. pallasii [8.3-26.0 mm NL (notochord length)] are carnivorous, consuming mainly copepods, rotifers, cirripeds, and free-living flatworms (Macrostomida). Their diet also include small quantities of shrimp nauplii, tintinnids, cladocerans, and larval bivalves, among other food sources. To evaluate ontogenetic changes in dietary composition, we split larvae into four size groups: 8-12 mm, 12-16 mm, 16-20 mm, and > 20 mm NL. Rotifers were the most important prey items for the smallest group, but all other groups predominantly consumed copepods. The largest group frequently preyed on rotifers, cirripeds and flatworms, in addition to copepods. Larvae also showed bi-modal feeding, with peaks in the late afternoon and at midnight, wherein the mean number of prey per individual peaked at 1,800-1,900 h.
Fish Species Collected by the Fish Collection Project from the Southern Sea of Korea during 2010-2012
Moon, Dae Yeon ; Jeong, Hyeon Gyeong ; Myoung, Jung-Goo ; Choi, Jung Hwa ; Kwun, Hyuck Joon ; Back, Jin Wook ; Hong, Sung Youl ; Kim, Seong Yong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 507~528
DOI : 10.5657/KFAS.2015.0507
The Fish Collection Project collected 356 fish species from the Southern Sea of Korea during 2010-2012, 55 more than previously collected. The fishes belonged to 3 classes, 29 orders and 128 families. The 5 dominant orders, Perciformes, Scorpaeniformes, Pleuronectiformes, Tetraodontiformes, and Clupeiformes, accounted for ~80% of the identified species. Additionally, 126 species were collected from the Southern Sea for the first time, while 85 species that had been found in previous collections were not seen. The species variety of fish in the Southern Sea may be influenced by its unique oceanographic conditions such as increased water temperatures in coastal areas, so regular surveys would assist our understanding of the fish community. We suggest that various collection methods, including diving, be used to collect fish species inhabiting rocky shore or deep-sea areas, where commercial fishing gear is difficult to deploy.
Species Composition and Community Structure of Demersal Fish Caught by a Danish Seine Fishery in the Coastal Waters of the Middle and Southern East Sea, Korea
Sohn, Myoung Ho ; Park, Jeong-Ho ; Yoon, Byoung Sun ; Choi, Young Min ; Kim, Jin-Koo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 529~541
DOI : 10.5657/KFAS.2015.0529
We examined the species composition and community structure of demersal fish in the middle and southern coastal waters of the East Sea of Korea by surveying a commercial Danish seine fishery from 2010 to 2013. We considered the waters north of
as middle and those south of
as southern waters. A total of 79 demersal fish species belonging to 18 families were collected. Of these, 59 species (77.6%) inhabited only the East Sea as opposed to the West and South Seas of Korea, and most were resident species. The species and biomass were similar between the two portions of the study area. The sandfish Arctoscopus japonicus (78.0%) and the blackfin flounder Glyptocephalus stelleri (65.1%) were the most common species and accounted for the most biomass in the middle and southern waters, respectively. Fish were most abundant at shallow depths (50-100 m) in the middle portion of the East Sea. Using a cluster analysis, we divided the species composition and community structure at the sampling stations into three groups: middle portion (group A), deep area of the southern portion (group B), and shallow areas of the southern portion (group C). A. japonicas and G. stelleri were dominant in groups A and B, while G. stelleri and Clupea pallasii were dominant in group C.
Evaluation of Pollution Level for Organic Matter and Trace Metals in Sediments around Taehwa River Estuary, Ulsan
Hwang, Dong-Woon ; Lee, In-Seok ; Choi, Minkyu ; Kim, Chung-Sook ; Kim, Hyung-Chul ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 542~554
DOI : 10.5657/KFAS.2015.0542
Grain size, the content of ignition loss (IL), and the concentrations of chemical oxygen demand (COD), acid volatile sulfide (AVS), and trace metals (Fe, Mn, Cu, Pb, Zn, Cd, Cr, As, and Hg) in surface sediments from the Taehwa River estuary, Ulsan, were measured to evaluate pollution levels and potential ecological risks of organic matter and trace metals in estuarine sediment. The mean grain size (Mz) of sediments in the study region ranged from
). Surface sediments in the upstream region of the Taehwa River were mainly composed of coarse sediments compared to the downstream region. The concentrations of IL, COD, AVS and trace metals in the sediment were much higher at downstream sites of Myeongchon Bridge in the vicinity of industrial complexes than at upstream sites of those in the vicinity of the residential areas due to the anthropogenic input of organic matter and trace metals by industrial activities. On the basis of several geochemical assessment techniques [sediment quality guidelines (SQGs), enrichment factor (EF), geoaccumulation index (
), pollution load index (PLI) and ecological risk index (ERI)], the surfaces sediments in the study region are not highly polluted for trace metals, except for As. However, the higher concentrations in downstream study regions of the Taehwa River could impact benthic organisms including shellfish (i.e. Manila clam) in sediments.
Distributions of Organic Matter and Trace Metals in Surface Sediments around a Manila Clam Ruditapes phillippinarum Farming Area in Gomso Bay, Korea
Choi, Minkyu ; Lee, In-Seok ; Kim, Chung-Sook ; Kim, Hyung-Chul ; Hwang, Dong-Woon ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 4, 2015, Pages 555~563
DOI : 10.5657/KFAS.2015.0555
Organic matter and trace metals were investigated in surface sediments of Gomso Bay, where there is dense Manila clam Ruditapes philippinarum farming activity, to evaluate contamination of sediments in intertidal shellfish farming area. We measured mean grain size (Mz), chemical oxygen demand (COD), ignition loss (IL), acid volatile sulfide (AVS), total organic carbon (TOC), and total nitrogen (TN), and trace metals (As, Cd, Cr, Cu, Fe, Hg, Mn, Pb and Zn) in intertidal and sublittoral sediments. The intertidal sediments were mainly composed of coarser sediments (sand, silty sand, and sandy silt), with Mz values ranging from 2.61 to 4.79 Ø. Mz and the content of organic matter in sediments were lower in the intertidal zone than in the sublittoral zone. The mean metal concentrations in surface sediments decreased in the order Fe > Mn > Zn > Cr > Pb > Cu > As > Cd > Hg. The metal concentrations in surface sediments showed a significant positive correlation with Mz and organic matter content, indicating that metal concentrations in the surface sediments of Gomso Bay are controlled by Mz and organic matter. The concentrations of organic matter and trace metals in the study region were lower than or similar to those in other intertidal zones in western coast and much lower than those reported in other shellfish farming areas in Korea. Our results suggest that intertidal Manila clam farming sediments from Gomso Bay are not contaminated by organic matter and trace metals.