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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 46, Issue 6 - Dec 2013
Volume 46, Issue 5 - Oct 2013
Volume 46, Issue 4 - Aug 2013
Volume 46, Issue 3 - Jun 2013
Volume 46, Issue 2 - Apr 2013
Volume 46, Issue 1 - Feb 2013
Selecting the target year
European Union System of Fisheries Management Based on Information and Communication Technology
Oh, Hyuntaik ; Lee, Wonchan ; Jung, Raehong ; Kim, Hyeonchul ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 513~519
DOI : 10.5657/KFAS.2013.0513
The fishing industry in Europe has faced environmental, economic, and social challenges. Since the early 2000s, a key tool in addressing these challenges has been information and communication technology (ICT), which has helped to modernize fishery systems in European Union (EU) countries. The ICT used in EU fisheries can be categorized broadly as 1) macro-technologies such as satellite and other remote sensing technologies in combination with geographical information systems, 2) micro-technologies adapted for fishing vessels such as echo sounders, ship navigation devices, and mobile communication devices to connect fishermen and consumers, and 3) onshore micro-technologies related to internet technology and mobile devices. The European Monitoring Center on Change has used ICT to effectively manage fisheries bio-resources. This use of ICT has contributed to the development of sustainable and competent fisheries in the 2000s, even though the knowledge-sharing practices involved are contrary to the long tradition of autonomy within the fishery industry.
Food Quality of Patties Prepared Using Antarctic Krill Euphausia superba Meat
Kim, Min-A ; Chae, Yeon-Joo ; Lee, Yang-Bong ; Chun, Byung-Soo ; Kim, Seon-Bong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 520~527
DOI : 10.5657/KFAS.2013.0520
This study developed patties using the Antarctic krill Euphausia superba and investigated the food quality of the patties. Three different types of krill patty were produced: krill patties with added 1) corn oil (CKP), 2) AA grade surimi (AKP), and FA grade surimi (FKP). Their proximate composition, Hunter color value, texture, sensory evaluation, and levels of astaxanthin, cholesterol, calories, total amino acids, fatty acids, and fluoride were investigated. The moisture and crude protein contents were highest in FKP. The calorie and astaxanthin contents were highest in CKP and lowest in AKP. The cholesterol content was highest in CKP and lowest in AKP. Measuring the Hunter color value of cross-sections of the patties, the L values were highest for FKP, and the a and b values highest for AKP. The total amino acids were highest in FKP and lowest in CKP. The major fatty acids were highest in FKP. The hardness and chewiness were highest in FKP and lowest in CKP. The fluoride content was highest in AKP and lowest in FKP. The sensory evaluation had the highest scores for FKP and lowest for CKP. Accordingly, FKP appears to have better food quality than the other two products.
Antimicrobial Resistance in Escherichia coli Isolated from the Shellfish Farms in the Southern Coast of Korea
Park, Kunbawui ; Park, Jun Yong ; Jo, Mi Ra ; Yu, Hong Sik ; Lee, Hee Jung ; Kim, Ji Hoe ; Oh, Eun Gyoung ; Shin, Soon Bum ; Kim, Yeon Kye ; Lee, Tae Seek ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 528~533
DOI : 10.5657/KFAS.2013.0528
This study evaluated the impact of antimicrobial resistant bacteria produced by inland pollution sources on coastal areas, and investigates antimicrobial resistance profiles of bacteria isolated from marine filter feeders. A total of 107 shellfish (short-necked clams Ruditapes philippinarum, ark shells Scapharca broughtonii, and oysters Crassostrea gigas) were collected from the southern coast of Korea, from which 204 Escherichia coli strains were isolated. The antimicrobial susceptibility patterns of isolated strains were analyzed for 15 antimicrobial agents used in Korea for clinical or veterinary therapy. Antimicrobial resistance was present in 44.6% of E. coli isolates against at least one antimicrobial agent. The rate of antimicrobial resistance in the Narodo area was higher than isolates from the Gangjinman area and Kamak Bay. E. coli isolates had a higher rate of resistance against: tetracycline (29.9%), streptomycin (25.5%), and trimethoprim (14.2%). Of 204 isolates, 29 (14.2%) were resistant to multiple antimicrobial agents.
Germicidal Effect of Electrolyzed Seawater on Live Fish and Shellfish
Lee, Hee-Jung ; Yu, Hongsik ; Oh, Eun-Gyoung ; Shin, Soon Bum ; Park, Kunbawui ; Kim, Ji Hoe ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 534~539
DOI : 10.5657/KFAS.2013.0534
To secure the biological safety of live fish and shellfish for raw consumption, the germicidal effects of electrolyzed seawater were evaluated. Upon direct exposure to electrolyzed seawater, coliform group bacteria were killed and decreased to undetectable levels after 1 day. The physicochemical characteristics of the seawater were stable during the test period. A byproduct of chlorine disinfection, trihalomethane, was not generated by the electrolysis of seawater. Vibrio parahaemolyticus infection in a live fish was effectively resolved by electrolyzed seawater and became undetectable after 12-36 h of treatment. Bioaccumulation of coliform group and fecal coliform bacteria in live oysters Crassostrea gigas was removed within 18 h of treatment. This study demonstrated that electrolyzed seawater is an effective and safe germicidal agent for the traditional retail market and can help to prevent outbreaks of foodborne disease associated with the consumption of raw fish and shellfish.
Body Composition of Black Rockfish Sebastes schlegeli Fed on Diets Containing Different Levels of Turmeric Curcuma longa L.
Hwang, Jae-Ho ; Rha, Sung-Ju ; Han, Kyeong-Ho ; Kim, Seon-Jae ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 540~545
DOI : 10.5657/KFAS.2013.0540
This study investigated the effect of diets supplemented with different levels (0, 1, 3, and 5 %) of turmeric Curcuma longa L. powder (TP) on the body composition of black rockfish Sebastes schlegeli. Fish weighing
g were fed to apparent satiation twice daily for 8 weeks. Adding TP decreased crude lipid levels and increased crude protein and ash levels. Abundant fatty acids in the TP-added group were C16:0, C18:1 n-9 (cis), and C22:6 n-3. The major amino acids in samples were glutamic acid, aspartic acid, glycine, leucine, alanine, lysine, and arginine.
Effects of the Dietary Inclusion of Porphyra and Sea Tangle Laminaria japonica on the Growth, Feed Utilization, Body Composition, and Plasma Chemistry of Juvenile Korean Rockfish Sebastes schlegeli
Jeon, Gyu Ho ; Cho, Sung Hwoan ; Lee, Sang Min ; Nam, Taek Jeong ; Kim, Dong Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 546~551
DOI : 10.5657/KFAS.2013.0546
This study examined the effects of the dietary inclusion of Porphyra and sea tangle Laminaria japonica on the growth, feed utilization, body composition, and plasma chemistry of juvenile Korean rockfish Sebastes schlegeli. Eight hundred and forty juvenile fish averaging 5.0 g were allocated 40 fish per tank to 21 180-L flow-through tanks. Seven experimental diets were prepared: control (Con) without additive, 0.5 and 1% Porphyra extract (PE), 3% Porphyra powder (PP), 0.5 and 1% sea tangle extract (STE) and 3% sea tangle powder (STP), referred to as PE-0.5, PE-1, PP-3, STE-0.5, STE-1, and STP-3, respectively. Each additive was included in the experimental diet at the expense of the same amount of wheat flour. Each experimental diet was fed to triplicate groups of fish. The experimental diets had no effect on the survival, weight gain or specific growth rate of the fish, feed consumption, feed efficiency ratio, protein efficiency ratio, protein retention, hepatosomatic index, condition factor, moisture or crude protein content of the entire body excluding the liver or moisture, crude protein or crude lipid content of the liver. None of the plasma parameters were affected by the experimental diets. Based on these results, the dietary inclusion of Porphyra and sea tangle did not affect the growth, feed utilization, body composition or plasma chemistry of juvenile Korean rockfish.
Effects of the Inclusion of Kimchi Lactic Acid Bacterial Culture in Extruded Pellets on the Growth, Body Composition and Immune Response of Juvenile Olive Flounder Paralichthys olivaceus
Jeon, Gyu Ho ; Cho, Sung Hwoan ; Kim, Hee Sung ; Myung, Sung Hyo ; Kim, Hyeon Jong ; Jung, Won-Gwan ; Park, Byum Hee ; Lee, Keum Joo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 552~558
DOI : 10.5657/KFAS.2013.0552
This study was performed to determine effects of the supplementation of Kimchi lactic acid bacterial culture in extruded pellets (EP) on the growth, body composition, blood chemistry and immune response of olive flounder Paralichthys olivaceus. Four hundred eighty individuals averaging 16.1 g were randomly distributed into 12, 180 L flow-through tanks (forty fish per tank). Four concentrations of Kimchi lactic acid bacterial culture (KL) were prepared: Control (0%), 0.1%, 0.2% and 0.5%. Three concentrations (0.1%, 0.2% and 0.5%) of Kimchi lactic acid bacterial culture were each diluted to 10% of EP weight and then fully absorbed by EP for 10 minutes. Each diet was fed to triplicate groups of fish. Fish were hand-fed to apparent satiation twice a day for 8 weeks. At the end of the 8-week feeding trial, the plasma lysozyme and bacterial activities of fish were determined. In addition, the cumulative mortality of fish was monitored for 8 days after their artificial infection with Edwardsiella tarda. The weight gain, specific growth rate, feed efficiency ratio, protein efficiency ratio, protein retention, hepatosomatic index and condition factor of fish were not affected by dietary supplementation with KL. None of the proximate composition, plasma parameters, lysozyme or bactericidal activities of fish was affected by dietary supplementation with KL. However, the cumulative mortalities of fish fed EP containing 0.1% and 0.5% Kimchi lactic acid bacterial culture were relatively low compared to that of fish fed the control diet. In conclusion, dietary supplementation with KL did not effectively improve growth, feed utilization, body composition, plasma chemistry, lysozyme, bactericidal activities or immune response of olive flounder after E. tarda infection under these experimental conditions.
Effects of Dietary Inclusion of Sea Tangle Laminaria japonica on Growth, Body Composition and Plasma Chemistry of Black Porgy Acanthopagrus schlegeli
Cho, Sung Hwoan ; Min, Byeong-Hee ; Lee, Jin Young ; Lee, Sang Yoon ; Kim, Ha-Na ; An, Shinhong ; Na, Kyoung-Suk ; Kim, Dong Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 559~564
DOI : 10.5657/KFAS.2013.0559
This study was performed to determine effects of dietary inclusion of various concentrations and sources of sea tangle Laminaria japonica on growth, body composition and plasma chemistry of juvenile black porgy Acanthopagrus schlegeli. Juvenile fish (N=810; average mass=8.9 g) were distributed among twenty-seven 200 L flow-through tanks (30 fish per tank). Nine experimental diets were prepared: control (Con) without additives; sea tangle powder at 0.1%, 0.5%, 1%, 2%, 3% and 5%, (P-0.1, P-0.5, P-1, P-3 and P-5 diets, respectively); and fresh sea tangle (F-1); and 1% sea tangle extract (E-1). Each powdered additive was substituted for an eqaul amount of wheat flour, and the extract was substituted for an equal amount of water in the respective experiemtnal diets. Each diet was fed to triplicate groups of fish. Weight gain and feed conversion ratio were not affected by the experimental diets. Feed consumption by fish fed the P-1 diet was higher than that of fish fed the P-3 and P-5 diets. Moisture, crude protein, crude lipid, whole-body ash content (excluding the liver), liver moisture, and crude protein and lipid contents of fish were not affected by the experimental diets. None of the fish plasma criteria were affected by the experimental diets, with the exception of plasma glucose. In conclusion, dietary inclusion of various concentrations and sources of sea tangle did not significantly affect the growth, feed efficiency, body composition or plasma chemistry of juvenile black porgy.
Survival Rate and Body Composition Changes in Juvenile Abalone Haliotis discus hannai by Temperature/Salinity Change
Jeong, Min Hwan ; Kim, Seong-Hee ; Park, Mi Seon ; Kim, Kang Woong ; Chang, Young Jin ; Myeong, Jeong-In ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 565~570
DOI : 10.5657/KFAS.2013.0565
Physiological studies on the salinity tolerance with respect to survival rate and body composition changes of the abalone Haliotis discus hannai were conducted by rapidly changing the salinity in an indoor rearing system. The survival rate of the control (35 psu), 30 and 25 psu groups at
was 100%. The survival rate of the 20 psu group was
. Survival rate of the 15 psu group was 0%. At
and 35, 30, 25, 20, 15 psu, the moisture contents of abalone muscle were
, respectively. Crude lipid contents were
, respectively and crude ash contents were
, respectively. At salinity below 20 psu, these values increased compared with the control. The general components of abalone muscles significantly increased below 20 psu, while amino acid composition showed no significant difference with salinity and water temperature.
Growth of Ulva pertusa Kjellman (Chlorophyta, Ulvophyceae) by a Light-Emitting Diode (LED) Light Source
Kwon, Chun Jung ; Choi, Chang Geun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 571~574
DOI : 10.5657/KFAS.2013.0571
To determine an efficient growth system for algal cultivation and to develop adequate culture system utilizing LED light, we investigated the effects of fluorescent and light emitting diode (LED) light source on the growth of Ulva pertusa. U. pertusa was cultured at
under a light intensity of 35
and a 10L:14D photoperiod using either fluorescent or LED lamps. After 1 week of incubation under the same environmental condition, the length and width of Ulva pertusa grown under LED light were 1.5- and 1.9-fold greater, respectively, than the length and width of algae grown under fluorescent light. After two weeks, length and width were 2.6- and 2.0-fold greater, respectively, in algae grown under LED light. Total length and width of Ulva pertusa after three weeks of incubation were 1.7- and 1.2-fold greater in algae grown under LED light than those grown under fluorescent light. Therefore, the LED light induced significantly higher growth of Ulva pertusa than fluorescent light.
Starvation Effects on Occurrence of Tunic Softness Syndrome in Sea Squirt Halocynthia roretzi
Kim, Dong Wook ; Park, Jung Jun ; Yang, Sung Jin ; Kim, Chang Hoon ; Shin, Yun Kyung ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 575~581
DOI : 10.5657/KFAS.2013.0575
We examined the effect of starvation on the occurrence of tunic softness to determine the cause of mass mortality of cultured Halocynthia roretzi (Drasche) in the Tongyeong region, Korea. In terms of the survival rate of H. roretzi and the occurrence rate of tunic softness, H. roretzi starved for 35 days at water temperatures of 8, 12, and
(room temperature of
) did not exhibit tunic softness at water temperatures of either
. for morphological changes, although the tunic of H. roretzi was shrunken and became visibly smaller with a darkening color in all experimental groups, as compared to the state prior to starvation, its tunics bulbs continuously. The ratio of RNA/DNA concentrations and protein contents for each of the tunic sections were lower in the starved group. Our results indicate that tunic softness is not related to feeding deficiency, as no histopathological symptoms were apparent in the digestive gland or tunic of H. roretzi due to starvation.
Changes in Fish Viral Disease Outbreaks in the Coastal Area of Korea Due to Increasing Water Temperature, an Impact of Climate Change
Kim, Wi-Sik ; Kim, Seok-Ryel ; Park, Myoung-Ae ; Lee, Joon-Soo ; Avunje, Satheesha ; Kim, Do-Hyung ; Oh, Myung-Joo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 582~588
DOI : 10.5657/KFAS.2013.0582
The impact of global warming on aquatic systems has been a priority research area in the past decade. However, the possibility that increased temperatures will cause shifts in viral disease outbreaks has not been well addressed. In the present study, with increasing water temperature (WT) in the coastal area of Korea, we estimated the possibility of changes in fish viral diseases. From the present time, WT may rise between 0.62 and
by 2050, and the effect on aquaculture could be more adverse than benefitial. Red seabream iridovirus disease (RSIVD) and viral nervous necrosis (VNN) cause high mortality above 22 and
, respectively, and outbreaks could commence earlier and persist for prolonged periods. Nevertheless, the period of occurrence of viral hemorrhagic septicemia (VHS), which outbreaks at a lower WT (<
), could be shorter than the current infectious period. Thermal stress in fish causes reductions in growth and immunocompetence; thus, increases in summer WT can lead to the development of new viral diseases. WT has a strong influence on fish population dynamics; therefore, entry of new viruses and changes in the prevalence of infection can be expected if carrier fishes are introduced or migrate to Korean waters.
First Description of the Adult Scolecenchelys aoki (Ophichthidae, Anguilliformes) Collected from the South Sea of Korea, with Comments on the Synonym Scolecenchelys borealis
Ji, Hwan-Sung ; Kim, Maeng Jin ; Kim, Jin-Koo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 589~593
DOI : 10.5657/KFAS.2013.0589
Scolecenchelys borealis was first added to the Korean fish fauna based on one leptocephalus specimen (total length (TL) 59.2 mm) collected from Dokdo, in the East Sea. Recently, however, Scolecenchelys borealis has been treated as a junior synonym of Scolecenchelys aoki, necessitating review of the scientific name S. borealis. This study describes the morphological characteristics of S. aoki based on an adult specimen (TL 230.0 mm) collected from the sea south of Korea and compares its mitochondrial DNA 12S rRNA sequence with that of the S. borealis leptocephalus. The adult S. aoki is characterized by several morphological features: vertebral formula 59-55-135; preanal lateral pores 55; infraorbital pores two; teeth on upper jaw visible externally when the mouth is closed; the dorsal fin originates just behind the anus; both jaws and vomerine teeth are conical, arranged in two rows. An analysis of an 886-base paire sequence of the 12S rRNA showed that adult S. aoki was concordant with the S. borealis leptocephalus (sensu Ji et al., 2012), indicating that both are the same species.
First Morphological Description of Ophichthus asakusae (Ophichthidae: Anguilliformes) Leptocephali Collected from the Waters South of Jeju Island
Ji, Hwan-Sung ; Choi, Jung Hwa ; Choi, Kwang Ho ; Lee, Dong Woo ; Kim, Jin-Koo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 594~597
DOI : 10.5657/KFAS.2013.0594
Two leptocephali [total length (TL) 68.2-80.5 mm] from the family Ophichthidae, collected from the waters south of Jeju Island, Korea, were identified using morphology. The two ophichthid leptocephali were identified as belonging to the genus Ophichthus based on morphological characters: 131-132 myomeres; nine gut swellings; dorsal fin origin above the middle of the body; five postanal pigments present from the anus to the caudal margin. Ultimately, both leptocephali were identified as Ophichthus asakusae, as the total number of myomeres was consistent with those of adult O. asakusae. Here, we first describe the morphological characteristics of the O. asakusae leptocephalus, and suggest diagnostic characters for leptocephali belonging to the genus Ophichthus.
Stock Assessment and Optimal Catch of Blackfin Flounder Glyptocephalus stelleri in the East Sea, Korea
Sohn, Myoung Ho ; Yang, Jae Hyeong ; Park, Jeong-Ho ; Lee, Haewon ; Choi, Young Min ; Lee, Jae Bong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 598~606
DOI : 10.5657/KFAS.2013.0598
The blackfin flounder Glyptocephalus stelleri is a commercially important species in the East Sea of Korea, but its catches and biomass have decreased gradually in recent years. This study estimated the optimal catch (acceptable biological catch, ABC) for the effective management of this species by estimating population ecology parameters and the stock biomass of blackfin flounder in the East Sea of Korea. The estimated instantaneous coefficient of total mortality (Z) of blackfin flounder was 1.0542/year, the survival rate (S) was 0.3485, and the instantaneous coefficient of natural mortality (M) was 0.3637/year. From the values of S and M, the instantaneous coefficient of fishing mortality (F) was calculated to be 0.6905/year. The age at first capture was 1.304 years, and the total length was 11.5 cm at that time. On the basis of these parameters, the annual biomass was estimated by a biomass-based cohort analysis using annual catch data in weight by year for 1991-2012 in the East Sea of Korea. The annual biomass peaked in 1997 at about 12,800 mt and then subsequently declined continuously to a level of 10,500 mt in 2004 and to 9,800 mt in 2011 and 2012. The maximum sustainable yield and
were estimated as 3,547 mt and 0.3595/year, respectively. Using these estimations, the ABC was estimated to be 3,571 mt in tier 5, 3,397 mt in tier 4, and 2,622 mt in tier 3.
Seasonal Variation in Community Structure of Subtidal Seaweeds in Jeju Island, Korea
Kim, Bo Yeon ; Ko, Jun-Cheol ; Ko, Hyuck Joon ; Park, Sung Eun ; Cha, Hyung Kee ; Choi, Han Gil ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 607~618
DOI : 10.5657/KFAS.2013.0607
Marine macroalgal community structures and characteristics of ocean environmental factors were examined seasonally at four sites in Jeju Island, Korea, from March to November 2012. A total of 71 macroalgal species were identified, including 9 green, 7 brown, and 55 red algae. Peyssonnelia capensis occurred at all study sites and in all seasons. The average annual biomass of seaweed was 991.84 g wet
, with seasonal variations from 543.80 g in autumn to 1,284.17
in summer. A green alga, Codium coactum, was the dominant species, occupying 21.31% (211.39
) of the total algal biomass in Jeju Island. Subdominant species were Ecklonia cava and Lithophyllum okamurae, comprising 20.85% (206.75
) and 19.64% (194.75
), respectively, of the total algal biomass in Jeju Island. The vertical distribution of subtidal seaweeds was represented by L. okamurae at 5 m depth, C. coactum at 10 m depth, E. cava at 5-10 m depth and P. capensis at the 20 m depth level. In the present study, crustose coralline algae, which predominated on barren ground, were subdominant species at all study sites. Community indices varied between 0.51-0.63 for dominance index (DI), 5.53-8.14 for richness index (R), 0.51-0.63 for evenness index (J'), and 2.04-2.32 for diversity index (H'). On the basis of seaweed biomass and community indices, Sinchang was the best preserved coastal area, showing maximal values in biomass, and evenness- and diversity-indices, and minimal value in the dominance index, representing stable environmental conditions. In contrast, the Onpyung and Topyeong sites, located near tourist venues such as Udo and Seogwipo were relatively poor habitats based on community indices and biomass. The present results could imply that climate changes alter seaweed community structure, and long-term monitoring of the study sites is required.
Yearly Fluctuation in the Fish Species Composition of Shrimp Beam Trawls off Maemuldo, Korea, during 2007-2009
Park, Jung-Youn ; Kang, Hyun-Sook ; Kang, Jung-Ha ; Kim, Jin-Koo ; Ryu, Jung-Hwa ; Kim, Dong-Sun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 619~625
DOI : 10.5657/KFAS.2013.0619
We investigated yearly fluctuation of the fish species composition of beam trawls off Maemuldo in the east southern sea of Korea, from March 2007 to November 2009. A total of 75 fish species were collected during the period. The number of fish species accumulated amounted to 54, 64 and 75 species in 2007, 2008 and 2009, respectively. The number of newly occurring species increased with time. The number of expected resident species in Maemuldo was estimated as 9 species including Conger myrister, Okamejei kenojei and Pholis nebulosa, each of which appeared more than 14 out of a total 27 times. Cluster analysis showed that the years 2007 and 2008 were closely clustered, while the year 2009 was distantly clustered with 2007 and 2008. This may be due to the high catch ratio of Clidoderma asperrimum in 2009 alone, when a low water temperature phenomenon was observed unlike the situation in 2007 and 2008.
Evaluation of Organic Matter and Trace Metal Contaminations of Intertidal Sediments from Coastal Islands in the Southern Region of Jeollanam Province
Hwang, Dong-Woon ; Kim, Pyoung-Joong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 626~637
DOI : 10.5657/KFAS.2013.0626
We measured the grain size, ignition loss (IL), chemical oxygen demand (COD), acid volatile sulfide (AVS) and trace metals (Al, Fe, Cu, Pb, Zn, Cd, Cr, Mn, Hg, and As) of intertidal surface sediment collected from 11 islands (62 stations) in the southern region of Jeollanam Province. The objective of this research was to evaluate the organic matter and trace metals contaminations of sediments from coastal island tidal flats. Surface sediment texture was characterized as follows: mud, sandy silt, muddy sand, and slightly gravelly sand facies. The finer sediments are mainly dominated in the northern part of each island. The concentrations of IL, COD, AVS and some trace metals (Al, Fe, Zn, Cr, Cu, and Hg) were higher in the northwestern part of Wan Island and the area between Gogeum and Sinji Islands, and were associated with relatively finer sediment, as compared to other locations. The concentrations of Mn, Pb, Cd, and As were higher in the northwestern and southeastern parts of Geoguem and Pyungil Islands, but were not correlated with mean grain size. Based on sediment quality guidelines (SQGs), the concentrations of trace metals were lower than the values of effect range low (ERL), used in United States, and threshold effects level (TEL), used in Korea, with exception of As. Similarly, the intertidal sediments were moderately contaminated with As, based on the the enrichment factor (EF) and the geoaccumulation index (
). The high concentration of As in intertidal sediments from this study region may be due to the input of naturally or artificially contaminated submarine groundwater, contaminated waste from seaweed aquaculture operations and/or land-based seaweed processing facilities. Further studies are needed to identify the sources of As in this study region, and to determine the effects of As contamination on coastal ecosystem.
Geochemical Characteristics of Intertidal Sediment in the Semi-enclosed Bays of the Southern Region of Jeollanam Province
Hwang, Dong-Woon ; Kim, Pyoung-Joong ; Jeon, Sang-Back ; Koh, Byoung-Seol ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 638~648
DOI : 10.5657/KFAS.2013.0638
To understand the geochemical characteristics of intertidal sediment in a semi-enclosed bay, we measured various geochemical parameters, including grain size, ignition loss (IL), chemical oxygen demand (COD), acid volatile sulfide (AVS), and trace metals (Al, Fe, Cu, Pb, Zn, Cd, Hg, and As), in intertidal sediment from three bays (Deukryang Bay, Yeoja Bay, and Gamak Bay) in the southern region of Jeollanam Province. The intertidal sediment in Deukryang Bay consisted of various sedimentary types, such as sand, gravelly muddy sand, mud, and silt, whereas the intertidal sediments in Yeoja and Gamak Bays were composed mainly of mud. The concentrations of IL, COD, AVS and trace metals in the intertidal sediments of the three study regions were relatively high near areas affected by input of stream waters and/or shellfish farming waste. The concentrations of organic matter and trace metals in Gamak Bay were much higher than those in Deukryang and Yeoja Bays, which appears to be due to the influence of anthropogenic pollutants, originating from the city and the industrial complex near Gamak Bay. The evaluation results of organic matter and metal pollution using the sediment quality guidelines showed that the intertidal sediments in the three study regions were not polluted in terms of organic matter and trace metals. In future, sustainable management for sources of organic matter and trace metal is necessary to conserve a healthy benthic ecosystem in intertidal sediments.
Distribution and Migration of Larval and Juvenile Sandfish Arctoscopus japonicus in the Coastal Waters off Gangwondo, Korea
Yang, Jae Hyeong ; Yoon, Sang Chul ; Park, Jeong-Ho ; Choi, Young Min ; Lee, Jae Bong ; Yoon, Byoung Sun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 46, issue 5, 2013, Pages 649~652
DOI : 10.5657/KFAS.2013.0649
Distribution and migration of larval and juvenile sandfish Arctoscopus japonicus in the coastal waters off Gangwondo were determined monthly from samples collected by a rectangular bottom net in the coastal waters off Gangwondo from March to July, 2011. Fish were collected in abundance from the northern waters from March to June. The average total length (
mm in March increased up to
mm in June. The size distribution of sandfish by depth suggested that the fish grew waters less than 50 m deep until June, before moving deeper waters of around 100 m.