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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
Editor in Chief :
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
Processings and Quality Characteristics of the Oyster Sauce from IQF Oyster Crassostrea gigas
Hwang, Young-Suk ; Kim, Sang-Hyun ; Kim, Byeong-Gyun ; Kim, Seon-Geun ; Cho, Jun-Hyun ; Oh, Kwang-Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 833~838
DOI : 10.5657/KFAS.2015.0833
To develop a value-added product from individually quick-frozen oyster Crassostrea gigas extract (IQFOE), we prepared two types of oyster sauce (OS): bottled OS (BOS) and retort pouched OS (ROS). We investigated processing conditions, quality metrics and flavor compounds in each type of sauce. We found that the most appropriate base formular for both BOS and ROS consisted of 40.0% IQFOE (Brix
), 15.0% sugar, 6.0% salt, 4.0% monosodium glutamate, 4.0% soy sauce, 3.5% starch, 3.0% yeast extract, 3.5% wheat flour and 21.0% water. The crude protein, salinity and amino-nitrogen contents of the BOS and ROS were 8.2 and 8.3%, 9.3 and 9.2%, and 539.2 and 535.2 mg/100 g, respectively. In commercial oyster sauces (COS), these values were 4.7-6.5%, 9.7-12.0%, and 244.7-504.2 mg/100 g, respectively. The total free amino acids content of ROS was 7,346.9 mg/100 g, and the main free amino acids were glutamic acid, taurine, proline, glycine and alanine. The inosinic monophosphate (IMP) content of the ROS was 131.6 mg/100 g, and the primary inorganic ions were Na, K, S and P. The present BOS and ROS have favorable organoleptic qualities and storage stability compared with COS, and are suitable for commercialization as high-flavor seasoning sauces.
Development of Salted Semi-dried Common Gray Mullet Mugil cephalus using Response Surface Methodology
Park, Kwon Hyun ; Heu, Min Soo ; Kim, Jin-Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 839~848
DOI : 10.5657/KFAS.2015.0839
This study examined the optimal salting drying method and processing conditions (salt concentration, curing time, dry temperature, and drying time) for preparing salted semi-dried common gray mullet (SSD-CGM) Mugil cephalus based on the moisture content, salinity, and overall acceptance using response surface methodology (RSM). The moisture content, salinity, and overall acceptance of SSD-CGM prepared with different salting methods revealed that dry salting was the optimal salting method for preparing high-quality SSD-CGM. The optimal drying method for preparing high-quality SSD-CGM based on the drying velocity and sensory color was hot air-blast drying. The results of the RSM program indicated that the optimal independent variables (
, salt concentration;
, curing time;
, dry temperature;
, drying time) based on the dependent variables (
, moisture content;
, overall acceptance) for high-quality SSD-CGM were 5.6% for
, 2.7 h for
, and 8.5 h for
for uncoded values. The predicted values of
for SSD-CGM prepared under optimal conditions were 54.4%, 4.2%, and 6.3, respectively, while the experimental values were
. The actual and predicted values did not differ.
Processing and Quality Properties of Olive Flounder Paralichthys olivaceus Steak Added with Pork Leg
Yoon, Moon-Joo ; Lee, Jae-Dong ; Kang, Kyung-Hun ; Park, Si-Young ; Joo, Jong-Chan ; Kim, Jeong-Gyun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 849~856
DOI : 10.5657/KFAS.2015.0849
This study was performed to obtain basic data regarding the development of fish steak products using olive flounder and pork leg. Olive flounder and pork leg were ground separately in a chopper. The methods used for processing were as follows. Chopped olive flounder (100 g) and other ingredients (bread crumbs, 13 g; onion, 12 g; garlic, 4 g; egg wash, 18 g; salt, 0.05 g; pepper, 0.05 g) were mixed in a chopper. The mixture was molded into a steak shape (
) and roasted in an oven at
for 12 min (OF). FP consisting of a mixture of olive flounder (70 g) and pork leg meat (30 g) and OP consisting of pork leg meat alone (100 g) were processed according to the same procedure as described for OF. Various factors (viable bacterial count, chemical composition, pH, salinity, hardness value, color value, total amino acid content, free amino acid content, fatty acid composition, mineral content) were measured, and sensory evaluation was conducted. Based on the results of the sensory evaluation and hardness value, OP was deemed to be the most desirable, followed in order by FP and OF. There was a slight but significant difference between OP and FP.
Nutritional and Taste Characterization of Commercial Salted Semi-dried Brown Croaker Miichthys miiuy
Park, Kwon Hyun ; Kang, Sang In ; Kim, Yong Jung ; Heu, Min Soo ; Kim, Jin-Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 857~863
DOI : 10.5657/KFAS.2015.0857
This study characterized the nutrition and taste of commercial salted semi-dried brown croaker Miichthys miiuy (SSD-BC). The mean crude protein content of the commercial SSD-BC was
(range, 17.7-23.2%), and the mean crude lipid content was
(range, 0.3-1.1%). The total amino acid content ranged from 17.08 to 18.56 g/100 g, except for sample code 5, which was 22.24 mg/100 g and differed significantly from the other samples. The major amino acids in the commercial SSD-BC were aspartic acid, glutamic acid, leucine, and lysine. In the commercial SSD-BC, the calcium ranged from 11.1-21.4 mg/100 g, phosphorus from 148.4-209.2 mg/100 g, and magnesium from 12.2-48.2 mg/100 g. Monoenoic acid (37.1-40.3%) was the most common fatty acid, followed by saturated acid (33.9-36.3%) and polyenoic acid (25.1-29.2%). The prominent fatty acids in the commercial SSD-BC were 16:0 (23.9-26.5%), 16:1n-7 (11.3-13.0%), 18:1n-9 (19.7-21.5%), and 22:6n-3 (6.9-10.7%). The mean trichloroacetic acidsoluble nitrogen content was 248.1 (range, 137.2-334.2) mg/100 g. The evaluation demonstrated that the commercial SSD-BC is rich in nutrition and taste.
Sanitary Quality of Commercial Salted-dried Convict Grouper Epinephelus septemfasciatus, and Longneck Croaker Pseudotolithus typus
Park, Kwon Hyun ; Kang, Sang In ; Kim, Min Joo ; Lee, Su Gwang ; Park, Sun Young ; Heu, Min-Soo ; Kim, Jin-Soo ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 864~875
DOI : 10.5657/KFAS.2015.0864
This study investigated the sanitary characteristics of commercial salted semi-dried convict grouper Epinephelus septemfasciatus (SSD-CG) and longneck croaker Pseudotolithus typus (SSD-LC) and suggested standards for salted semi-dried fish (SSD-F), based on the domestic standards for salted mackerel (Scomber japonicus or kwamegi) and salted dried yellow corvenia (Pseudosciaena manchurica), and sanitary characteristics of commercial SSD-F. For the commercial SSD-CG and SSD-LC, respectively, the moisture content ranged from 64.6-76.1 and 65.7-77.5%, salinity from 2.7-8.2 and 1.5-4.9%, volatile basic nitrogen (VBN) from 22.1-88.2 and 13.5-87.4 mg/100 g, peroxide value (POV) from 17.2-195.0 and 28.5-190.2 mEq/kg, and viable cell counts from 6.1-8.4 and 5.4-7.2 log (CFU/g). No Escherichia coli was detected in six kinds of SSD-CG or three kinds of SSD-LC. The standard for controlling the quality of SSD-F is the moisture content (>68%), salinity (>3%), VBN content (>50 mg/100 g), POV (>60 mEq/kg), viable cell counts (>
CFU/g), E. coli (>MPN/100 g), and others. Using the established standards, no commercial SSD-F passed. The chemical, microbial, and other results for commercial SSD-F suggest that provisions for controlling the quality of high-quality SSD-F should be established.
Effect of Heat Treatment on Biochemical Characteristics of Pacific Oyster Crassostrea gigas
Shim, Kil Bo ; Kim, Mina ; Park, Kunbawui ; Son, Kwangtae ; Lim, Chi Won ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 876~882
DOI : 10.5657/KFAS.2015.0876
The aim of this study was to investigate changes in the biochemical characteristics of the Pacific oyster Crassostrea gigas in response to boiling water bath (
) and autoclaving (
) heat treatments for 5, 10, 15, and 20 min. The weight loss (7.6-9.5%) of oysters exposed to a
boiling water bath for 15 min was lower compared to those receiving no treatment. Oysters exposed to the
boiling water bath for 20 min lost 27.8% of their total weight. The
autoclaving treatment resulted in weight loss of 13.0-26.1%, with the highest weight loss occurring after 10 min of treatment (26.1%). Heat-treated oysters had significantly higher levels of crude lipid and crude protein relative to untreated oysters (P<0.05). In the heat-treated oysters, total amino acids (including proline and glutamic acid) were increased, but they were decreased by the 20-min
boiling water bath and autoclaving treatments. The fatty acid composition of oysters was not significantly affected by the water bath heat treatment, but oysters treated with
autoclaving for 20 min had decreased polyunsaturated fatty acids. Oysters exposed to the water bath heat treatment had significantly increased vitamin A content, but
autoclaving for 20 min was associated with reduced vitamin A content, as compared to all of the other heat treatments. Therefore, oysters were affected by heat treatment, undergoing metamorphosis and weight loss, but nutrient quality did not change significantly compared to controls, except with the 20-min
boiling water bath and autoclaving treatments.
Biogenic Amine Contents of Commercial Salted and Fermented Sand Lance Ammodytes personatus Sauces
Um, In-Seon ; Park, Kwon-Sam ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 883~887
DOI : 10.5657/KFAS.2015.0883
This study investigated the quality of seven commercial salted and fermented sand lance Ammodytes personatus sauces by measuring their chemical compositions, bacteria concentrations, and biogenic amine contents. The sauces had a 63.97-67.32% (mean: 65.72%) moisture content, 23.16-24.03% (mean: 23.60%) salinity, 5.51-6.14 (mean: 5.81) pH, 164.76-217.98 mg/100 g (mean: 182.97 mg/100 g) volatile basic nitrogen, 0.94-1.42% (mean: 1.24%) total nitrogen, and 673.77-791.86 mg/100 g (mean: 720.76 mg/100 g) amino nitrogen content. Viable cell counts ranged from
, and number of biogenic amine-forming bacteria was very low or not detected. Overall, the tested samples had average levels of histamine of 301.02 mg/kg, cadaverine of 29.78 mg/kg, tyramine of 199.21 mg/kg, putrescine of 183.00 mg/kg, and tyramine of 13.01 mg/kg. This strongly suggests that it is necessary to monitor the biogenic amine contents of commercial salted and fermented sand lance sauces carefully to ensure consumer health.
Anti-Inflammatory Effect of Alginate Oligosaccharides Produced by an Alginate-Degrading Enzyme from Shewanella oneidensis PKA1008 on LPS-Induced RAW 264.7 Cells
Kim, Min-Ji ; Bae, Nan-Yong ; Bark, Si-Woo ; Kim, Koth-Bong-Woo-Ri ; Park, Ji-Hye ; Park, Sun-Hee ; Ahn, Dong-Hyun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 888~897
DOI : 10.5657/KFAS.2015.0888
The anti-inflammatory effect of alginate oligosaccharides on LPS-induced RAW 264.7 cells was investigated at different time points (0-60 h). The alginate oligosaccharides were produced by an alginate-degrading enzyme from Shewanella oneidensis PKA1008. The alginate oligosaccharides decreased the production of nitric oxide and proinflammatory cytokines [tumor necrosis factor-
, interleukin (IL)-
, and IL-6] in a dose-dependent manner. The alginate oligosaccharides showed peak anti-inflammatory activity after 36 h of incubation; at that time point, reduced protein expression of NF-
p65, iNOS, and COX-2 was detected. Furthermore, the alginate oligosaccharide treatment reduced the formation of ear edema at 36 h compared to samples examined at 0 h when the oligosaccharides were administered at 50 and 250 mg/kg body weight, as well as dermal thickness and mast cell numbers in a histological analysis. These results suggest that alginate oligosaccharides are a promising anti-inflammatory agent.
Effect of Heat Treatment on Male specific Coliphage and Norovirus Concentrations in Norovirus Contaminated Oyster Crassostrea gigas
Park, Kunbawui ; Park, Yong Su ; Kwon, Ji Young ; Yu, Hong Sik ; Lee, Hee Jung ; Kim, Ji Hoe ; Lee, Tae Seek ; Kim, Poong Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 898~903
DOI : 10.5657/KFAS.2015.0898
Noroviruses (NoV) are known to cause acute epidemic gastroenteritis worldwide. Outbreak strains are predominantly genogroup I (GI) and genogroup II (GII) in oysters Crassostrea gigas. We investigated the changes in concentration of male specific coliphage (MSC) and NoV under heat treatment of the naturally contaminated oyster, Crassostrea gigas. After heat treatment for 5 min in
, no viable MSC was detected. The concentrations of GI and GII NoV decreased by 1.65 log and 2.25 log, respectively, following heat treatment for 5 min at
. Moreover, both GI and GII NoV were completely deactivated by heat treatment for 10 min at
. Therefore, in order to reduce the risk of norovirus infection from contaminated oysters, immersion in boiling water for at least 10 min is recommended.
Antibacterial Activity of Bacteria Isolated from Rocks on the Seashore
Park, In-Suk ; Oh, Ryunkyoung ; Lee, Min Jeong ; Moon, Ji Young ; Kim, Young-Ok ; Nam, Bo-Hye ; Kong, Hee Jeong ; Kim, Woo-Jin ; An, Cheul Min ; Kim, Dong-Gyun ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 904~912
DOI : 10.5657/KFAS.2015.0904
There is a great deal of research interest regarding substitutes for antibiotics because of various obstacles to the efficacy and use of antibiotics. We isolated and analyzed diversity of microbiota which exhibited antibacterial activity against 23 pathogenic bacteria, to develop alternative agent of antibiotics. By investigating the microbiota from rocks on the seashore, we characterized and obtained various antibacterial material-producing bacteria. Thirty-one isolates belong to four genera and seven species, according to 16S rDNA sequence analysis, showed antibacterial activities against 23 pathogenic bacteria. The Identity of 16S rDNA sequences indicated three species of Bacillus, one species of Paenibacillus, one species of Pseudomonas and two species of Enterobacter. Two isolates were similar to Bacillus aerophilus, four isolates were similar to Bacillus pumilus, seven isolates were similar to Bacillus safensis, 15 isolates were similar to Paenibacillus polymyxa, respectively. In addition, one isolate was similar with Pseudomonas poae, one isolate was similar to Enterobacter asburiae, and one isolate was similar to Enterobacter ludwigii, respectively. Variations of antibacterial activity and level among the same species were indicated the diverse strains of isolates. Vibrio vulnificus showed the highest degree of growth inhibition by 29 isolates. Further studies regarding antibacterial materials and bacteria suggest that development of probiotic strains or alternative agents to antibiotics.
Characterization and Transcriptional Activity of a Vitamin D Receptor Ortholog in the Ascidian Halocynthia roretzi
Lee, Jung Hwan ; Sohn, Young Chang ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 913~919
DOI : 10.5657/KFAS.2015.0913
In vertebrates, the vitamin D receptor (VDR), a member of the nuclear receptor superfamily, binds the biologically active ligand
). Nearly all vertebrates, including Agnatha, possess a VDR with high ligand selectivity for 1,25
and related metabolites. Although a putative ancestral VDR gene is present in the genome of the chordate invertebrate Ciona intestinalis, the functional characteristics of marine invertebrate VDR are still obscure. To elucidate the ascidian Halocynthia roretzi VDR (HrVDR), we cloned full-length HrVDR cDNA and investigated the transcriptional activity of HrVDR in HEK293 cells. HrVDR consists of 1,680 nucleotides (559 amino acids [aa]), including a short N-terminal region (A/B domain; 26 aa), DNA-binding domain (C domain; 72 aa), hinge region (D domain; 272 aa), and C-terminal ligand-binding domain (E domain; 161 aa). The amino acid sequence identity of HrVDR was greatest to that of C. intestinalis VDR (56%). In the luciferase reporter assays, the transcriptional activity of HrVDR was not significantly increased by 1,25
, whereas the farnesoid X receptor agonist GW4064 increased the transactivation of HrVDR. These results suggest the presence of a novel ligand for and a distinct ligand-binding domain in ascidian VDR.
Growth of Young Sea Bass Lateolabrax japonicus in the Eelgrass Beds of Gamak and Yeoja Bays in Relation to Environmental Variables
Kim, Jin-Koo ; Ryu, Jung-Hwa ; Kim, Jeong Bae ; Lee, Won-Chan ; Kim, Hyung Chul ; Moon, Seong Yong ; Kim, Hee Yong ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 920~928
DOI : 10.5657/KFAS.2015.0920
This study aims to reveal the relationship between growth of young sea bass and environmental variables in two adjacent eelgrass beds. Fishes were collected from Gamak Bay (GB) and Yeoja Bay (YB) on the southern coast of Korea from February 2006 to February 2007 using a dragnet (15 m in length and 3 m in width). During the study period, a total of 367 individuals of young sea bass Lateolabrax japonicus were collected from GB (171 inds.) and YB (196 inds.). Significant differences were observed in the occurrence periods and growth patterns of young sea bass, as well as in environmental variables between GB and YB. Young sea bass were collected from April to December in GB, but from April to July in YB. These differences may be associated with differences in eelgrass density, leaf width, and zooplankton density between GB and YB.
Age and Growth of the Goldeyes Rockfish Sebasetes thompsoni in the Ulleungdo and Dokdo Areas
Heo, Yo Won ; Lee, Jae Bong ; Yang, Jae Hyeong ; Cha, Hyung Kee ; Kim, Jung Jin ; Zhang, Chang Ik ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 929~939
DOI : 10.5657/KFAS.2015.0929
We studied the characteristics of age and growth of the Goldeyes rockfish Sebasetes thompsoni in the Ulleungdo and Dokdo areas by using 730 otoliths from February 2013 to February 2014. The lowest value of the marginal index was found in June once a year. The spawning period was estimated as April. Therefore, the duration from fertilization to the complete formation of the first annual growth ring is fourteen months. From the parameters calculated using the weighted average length of the year ring formation, the growth of S. thompsoni was demonstrated by the von Bertalanffy growth equation as
for females and
for combined sex. Comparing with growth performance index(
) from these 4 offshore areas, parameter of S. thompsoni in Ulleungdo area was 2.4087, that of in Tong-yeong was 2.2835, that of in Aomori was 2.4077 and in Niigata was 2.3927. As a result, the value of Dokdo and Ulleungdo areas showed the highest.
Occurrence of Indo-Pacific Bottlenose Dolphins Tursiops aduncus off Jeju Island, Korea during the Early 2000s
Kim, Hyun Woo ; Sohn, Hawsun ; An, Yong-Rock ; Park, Kyum Joon ; Choi, Young-Min ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 940~946
DOI : 10.5657/KFAS.2015.0940
The Indo-Pacific bottlenose dolphin Tursiops aduncus commonly inhabits the coastal waters of Jeju Island, Korea. An investigation was conducted using data from vessel sightings and point sightings from land. During 40 days of vessel sighting surveys between 2007 and 2010, a total of 18 dolphin groups were encountered. The overall sighting rate was 0.01 group/n.m. Most Indo-Pacific bottlenose dolphins were sighted within 500 m of the northern coast of Jeju Island during surveys. Also, dolphin groups were observed 47 times during 109 days of shore-based surveys conducted between 2011 and 2015. The results of a dolphin distribution survey conducted in 2011 were generally similar to the results of previous surveys. However, there were no dolphin sightings from 2012 in Hanllim-eup, in the north-western part of the island, where dolphins were sighted frequently until 2011, whereas dolphin observations increased in the southern part of the island. The mean group size was 35.4 (SD=18.08) individuals. The most frequently sighted group size was 36-40 individuals. To conserve resident dolphins off Jeju Island, long term sighting surveys and environmental assessment are required to monitor their distribution patterns.
Seasonal Variations in the Species Composition of Fisheries Resources Caught by Trammel Net in the Uljin Marine Ranching Area, East Sea
Yoon, Byoung Sun ; Park, Jeong-Ho ; Yoon, Sang Chul ; Yang, Jae Hyeong ; Lee, Sung-Il ; Kim, Jong-Bin ; Choi, Young-Min ; Sohn, Myoung Ho ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 947~959
DOI : 10.5657/KFAS.2015.0947
Variations in the species composition, biomass and size distribution of fisheries resources in the Uljin marine ranching area were investigated using trammel nets at two stations (artificial reef and natural rocky area) from 2009 to 2010. During the survey, a total of 74 species were sampled with a mean density of 132 ind./net and mean biomass of 21.56 kg/net. In the natural rocky area, a total of 45 species were sampled at a mean density of 202 ind./net and mean biomass of 28.81 kg/net, while in the artificial reef area, samples included a total of 56 species, with means of 62 ind./net and 14.30 kg/net. The dominant species, comprising over 3% of the total number of individuals, were Suberites ficus (30.8%), Ovalipes punctatus (19.2%), Paralichthys olivaceus (11.7%), Pleuronectes herzensteini (4.7%), Kareius bicoloratus (3.5%), Pseudopleuronectes yokohamae (3.5%) and Eopsetta grigorjewi (3.0%). The dominant species, in terms of biomass, comprising over 5% of the total biomass, were P. olivaceus (22.1%), S. ficus (18.7%), O. punctatus (7.2%), Hexagrammos otakii (6.6%), P. yokohamae (5.7%), K. bicoloratus and P. herzensteini (5.3%). A cluster analysis and non-metric multidimensional scaling (nMDS) analysis based on the Bray-Curtis similarity of fourth root transformed data for number of species and individuals, was divided into two groups: the artificial reef area (group A) and the natural rocky area (group B).
Comparison of the Distribution of Demersal Fish Biomass Determined by Bottom Trawl and Hydroacoustic Surveys in the Northern East China Sea in Winter, 2014
Heo, Yusim ; Lee, Hyungbeen ; Choi, Jung Hwa ; Cha, Hyung Kee ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 960~968
DOI : 10.5657/KFAS.2015.0960
This study examined the spatiotemporal distribution of demersal fish aggregations in the Northern East China Sea by conducting a trawl survey with hydroacoustic devices. A bottom trawl was used for this survey and fish density was determined from the catch data. Acoustic data were collected at frequencies of 38 and 200 kHz from November to December 2014 and converted into the nautical area scattering coefficient (NASC,
). In the catch data analysis, the range of catch per unit area by station was
and for the acoustic data, that of the NASC was
. The values were significantly correlated. The combined results of both surveys found that the density was highest at St. 5 (
23.3') and lowest at St. 8 (
36.3'). The application of hydroacoustic methods offers a new approach for estimating the biomass of demersal fish aggregations.
A Study on Long-term Monitoring of Seaweed Flora and Community Structure at Hakampo, Western Coast of Korea
Heo, Jin Suk ; Han, Su Jin ; Choi, Han Gil ; Nam, Ki Wan ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 969~976
DOI : 10.5657/KFAS.2015.0969
Macroalgal community structure was seasonally examined at Hakampo (Taean) in western coast of Korea from February 2007 to October 2010. Also, the effects of "Hebei Spirit" oil spill on the seaweed community structure were evaluated. A total of 101 macroalgal species were identified, comprising 12 green, 18 brown and 71 red algae. Species richness ranged 58-65 species with maximal in 2008 and minimal in 2009. Seaweed biomass ranged
) with maximal in 2008 and minimal in 2010. Vertical distribution from the high to low intertidal zone was Neorhodomela aculeata and Polyopes affinis; Corallina pilulifera and Chondrus ocellatus; Sargassum thunbergii and Ulva australis. Coarsely-branched seaweeds comprised the highest proportion of biomass (
, or 41.86% of the total biomass) and ecological state group I (ESG I) seaweed biomass was between 81.67-85.44%. Also, ephemeral macroalgae including Ulva species sharply increased in species number and biomass within 1-2 year from the "Hebei Sprit" oil spill in the mid and low intertidal zone. Hakampo rocky shore is still good condition as evaluated based on macroalgal species number, biomass, and composition in functional form and ESG I seaweeds.
Proximate and Fatty Acid Compositions of Commercial Domestic and Imported Melania Snails Semisulscospira sp.
Moon, Soo-Kyung ; Kim, In-Soo ; Lim, Chi-Won ; Yoon, Na Young ; Jeong, Bo-Young ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 977~981
DOI : 10.5657/KFAS.2015.0977
The proximate, fatty acid and dimethyl acetal (DMA) compositions of domestic and imported melania snails Semisulcospira sp. being sold commercially were studied. The protein content ranged from 8.09% (China) to 11.3% (North Korea). The lipid content ranged from 0.84 (China) to 2.36% (North Korea). Domestic melania snail had protein (10.5%) and lipid (1.02%) contents intermediate between those of the two imported melania snails. The prominent fatty acids were 16:0 and 18:0 saturated fatty acids, 16:1n-7, 20:1n-11, 18:1n-9, 18:1n-7 and 16:1n-9 monounsaturated fatty acids, and 20:4n-6, 20:5n-3 (eicosapentaenoic acid, EPA), 22:2 non-methylene-interrupted diene (NMID), 18:3n-3, 18:2n-6 and 22:5n-3 (docosapentaenoic acid, DPA) polyunsaturated fatty acids (PUFA). The percentage of n-3 PUFA was higher in domestic (19.6%) and North Korean (imported, 19.5%) snails than in that from China (imported, 16.8%), while the n-6 PUFA level was higher in snails from China (21.2%) and domestic snails (14.7%) than in that from North Korea (9.87%). The total DMA, i.e., 18:0 DMA, 16:0 DMA and 18:1 DMA was 7.30, 7.27, and 4.86% domestic snail and those from China and North Korea, respectively. These results suggest that melania snail is a source of n-3 PUFA, and DMA derived from plasmalogen.
Feeding Habits of Javelin Goby Synechogobius hasta on Tide Flat in Sangnae-ri Suncheon, Korea
Park, Jong Hyeok ; Jeong, Jae Mook ; Kim, Hyeon Ji ; Ye, Sang Jin ; Baeck, Gun Wook ;
Korean Journal of Fisheries and Aquatic Sciences, volume 48, issue 6, 2015, Pages 982~987
DOI : 10.5657/KFAS.2015.0982
During the study period, a total of 158 individuals of Synechogobius hasta were collected. The range of body length (BL) was 15.4-44.5 cm. The stomachs of 26.6% of the individuals were empty. The most abundant prey was shrimp. Among shrimp, Exopalaemon orientis was the most abundant species, being present in 27% in %IRI (index of relative importance). Fishes and crabs were also abundant prey. Analysis of ontogenetic changes, suggested that shrimp were the main prey of S. hasta of two size classes (<20 and 20-25 cm). The proportion of shrimp decreased, but that of fishes and crabs increased, with increasing body length, beginning at the 25-30 cm size class. In spring, fishes were the dominant prey, while shrimps, and crabs and fishes dominated in autumn and winter, respectively.