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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Korean Journal of Malacology
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Journal DOI :
The Malacological Society of Korea
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Volume & Issues
Volume 31, Issue 4 - Dec 2015
Volume 31, Issue 3 - Sep 2015
Volume 31, Issue 2 - Jun 2015
Volume 31, Issue 1 - Mar 2015
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Predation of Neptunea cumingii Crosse on the Young Disk Abalone, Haliotis discus hannai (Ino) in the Eastern Coast of Korea
Byon, Ju-Young ; Moon, Hyung-Tae ; Son, Min Ho ; Hwang, Choul-Hee ; Lee, Jong-Wook ; Kim, Dae-Ik ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 165~170
DOI : 10.9710/kjm.2015.31.3.165
The presence of predators (excluding starfishes) of disk abalone, Haliotis discus hannai was directly investigated by nine SCUBA divings during February-December 2014 at the coastal areas of Yangjeong, Jukjin and Bongpyeong, Uljin, Korea, where the young disk abalone seedlings were artificially released. The results revealed that a total of six individuals of Neptunea cumingii that were feeding on the young disk abalone were observed within the water depth 10m at the coastal area of Jukjin, of which bottom substrate consists of the relatively high composition rate of rocks (60.3%). Though N. cumingii is well known as a carnivorous predator of diverse marine invertebrates such as live mussels (Mytilus spp.) it is the first report that this predator also feeds on the disk abalones. Thus, our results strongly suggest that the future artificial release projects around Korean coasts necessitate extermination works of predators including newly observed N. cumingii in this study as well as previously known starfishes prior to the releases of young Pacific abalone seedlings.
Reproductive Ecology of the Freshwater Bivalve, Unio douglasiae (Unionidae) in Lake Uiam
Song, Mi-Young ; Im, Jire ; Lee, Wan-Ok ; Kim, Sung Tae ; Kim, Dae-Hee ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 171~178
DOI : 10.9710/kjm.2015.31.3.171
The reproductive ecology of freshwater bivalve, Unio douglasiae in Lake Uiam were examined from March 2014 to February 2015. The gonads distributed in reticular connective tissue, the dioecious clams take an internal fertilization and fertilized eggs are stored in the foster-sack in the gills, then the hatched juveniles are released outside after an ovoviviparous process. The gonad index (GI) began to increase in April, reached the maximum value in July and to decrease in August. The reproductive cycle of U. douglasiae can be divided into five successive stages: multiplicative stage (November to January), growing stage (February to March), mature stage (February to May), spawning stage (April to September), recovery stage (August to December). The spawning periods were from April to September, and the main spawning occurred between April and July. The shell length at 50% group maturity was estimated to be 29.4 mm.
Effects of concentration and permeation time of cryoprotectants on fertilization and hatching rate in the unfertilized egg of the Pacific oyster Crassostrea gigas
Kim, Ki Tae ; Lim, Han Kyu ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 179~186
DOI : 10.9710/kjm.2015.31.3.179
The Pacific oyster Crassostrea gigas oocytes were exposed to 4 cryoprotectants, dimethyl sulfoxide (DMSO), ethylene glycol (EG), methanol, or polyethylene glycol (PEG), each with 4 four concentrations (5, 10, 15, and 20%) and for 10, 20, 30 or 40 minutes for permeation. The oocytes were then fertilized, using normal sperm of the species. Fertilization and hatching rates were clearly influenced by cryoprotectant species and their concentration and permeation time. Overall, they decreased as concentrations and permeation time of cryoprotectants increased with optimum results at concentrations of 5-10% and a permeation time of 10 minutes. Larval abnormalities, a sign of the chemical damage, were a representative phenotype which was higher at a higher concentration and longer duration of the chemicals. In conclusion, best result was from 5% DMSO exposure for 10-20 minute permeation.
Influence of elevated temperatures on the physiological response of hemolymph from two species of abalone, Haliotis gigantea and Haliotis discus discus (Reeve, 1846)
Min, Eun-Young ; Kim, Shin-Hu ; Hwang, In-Ki ; Kim, Kyeong-Wook ; Park, Bo-Mi ; Lee, Jung Sick ; Kang, Ju-Chan ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 187~194
DOI : 10.9710/kjm.2015.31.3.187
This study was conducted to examine the effects of alterations in water temperature (WT) on biochemical and immunological factors in the hemolymph of the abalones, Haliotis gigantea and H. discus discus. The abalone were exposed to various WT; 18, 20, 22, 24, 26 and
for 96 hours. In biochemical factors, total-protein (TP), glucose, magnesium (Mg), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were not significant changes in hemolymph of H. gigantea and H. discus discus. But calcium was significantly increased by high WT (
). In immunological factor, The phenoloxidase (PO) activity was decreased in hemolymph of H. gigantea and H. discus discus exposed to high temperature (
) compared to the control (P < 0.05). Whereas alkaline phosphatase (ALP) was not significantly changed. These results suggested that high temperature adversely affects the immunity of H. gigantea and H. discus discus.
Histological Indicator Change of the Abalone, Haliotis discus hannai Chronic Exposed to Zinc Chloride (ZnCl
Son, Maeng-Hyun ; Kim, Byeong-Hak ; Kim, Suji ; Lee, Jung Sick ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 195~201
DOI : 10.9710/kjm.2015.31.3.195
This study was conducted to find out concentration of trace metal, survival rate, falling rate and structural changes of abalone, Haliotis discus hannai exposed to zinc chloride. Experimental groups were composed of one control condition and four exposure conditions (0.3, 0.8, 1.3,
). The accumulation of trace metal (zinc) in abalone was significantly increased all exposure group. Though the exposure groups had lower survival rate than the control group, higher falling rate than the control group. Histopathological changes in the foot, gill and hepatopancreas of abalone revealed obvious with exposure group than control group.
The Influence of Water Temperature on Filtration Rates and Ingestion Rates of the Blue Mussel, Mytilus galloprovincialis (Bivalvia)
Lee, Seo E ; Shin, Hyun Chool ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 203~212
DOI : 10.9710/kjm.2015.31.3.203
This study was performed to describe the influence of temperature on the clearance rate and ingestion rate of the blue mussel, Mytilus galloprovincialis with three food organisms and habitat location (shell size) of mussel. Food organisms used in this experiments were Isochrysis galbana, Chaetoceros didymus and Prorocentrum dentatum. The size of mussels inhabiting higher midlittoral zone was smaller than those of lower midlittoral zone. Regardless of the kind of food organisms, filtration rates and ingestion rates of higher midlittoral mussels were higher than those of lower midlittoral mussels in experiment temperature conditions. The variation of filtration rate and ingestion rate showed same tendency with temperature. Filtration rates and ingestion rates increased with temperature, and recorded maximum values at
of temperature, and thereafter decreased gradually. Theoretical optimum temperatures showing maximum filtration rates and ingestion rates estimated from polynomial regression curves were also in the range of
. Blue mussels showed different variation of filtration rate and ingestion rate with the kind of food organisms. Filtration rates and ingestion rate based on cell number were similar regardless of habitat location(tidal elevation) and food organisms. Ingestion rates based on carbon content showed very high values in case of P. dentatum beside I. galbana and C. didymus as food organism.
Oil spill of Hebei spirit and Change of Manila Clam, Ruditapes philippinarum beds in the West coast of Korea
Park, Kwang-Jae ; Kim, Su-Kyoung ; Kang, Duk-Young ; Song, Jae-Hee ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 213~220
DOI : 10.9710/kjm.2015.31.3.213
After oil outlow accident of Hebei spirit in December 7, 2007, the motality of manila clam, Ruditapes philippinarum in the west coast of South Korea, was significantly increased from 9.2% in April, 2007 to 22.4% in April 2008. Although the mortality was about 10% in the tidal flat of Geunso Bay and Cheonsu Bay, Incheon and Gyeonggi-do, the values was significantly high about 30% in water coast of Taean, Boryeong and Seosan in where the spilled oil was getting into fishery zone. However, the mortality in water coast of Taean, Boryeong and Seosan was decreased from 22.4% in 2008 to 6.0% in 2009. Also, we found that the mortality in contaminated and non-contaminated water zones was both slightly increased from 6.0 in 2009 to 8.6% in 2010, Therefore, these results are indicating that the significant high mortality observed in water coast of Taean, Boryeong and Seosan at April, 2008 was due to the crude oil accident outflow from tanks of Hebei spirit. Although the mortality of manila clam was significantly decreased in middle west coast of South Korea after the accident of Hebei spirit in December, 2007, the annual production of manila clam in South Korea was sustainedly from 27,459 ton in 2007, 36,302 ton in 2008, 40,392 ton in 2009, to 36,248 ton in 2010. In the production of manila clam by regional groups, the amount in sea coast of Chungnam, where was damaged by crude oil, was significantly decreased from 10,598 ton in 2007 to 5,048 ton in 2008, but then was significantly increased to 7,065 ton in 2009, and to 12,921 ton in 2010. However, in sea coast of Jeonnam that was not damaged by crude oil, the amount was significantly increased from 1,252 ton in 2007 to 12,248 ton in 2008, but then was significantly decreased to 9,566 ton in 2009, and to 2,770 ton in 2010. Therefore the results are suggesting that a increasing of the total annual production of manila clam in South Korea in 2008 when was 1 year after the oil accident of Hebei spirit was due to increasing of clam production in a coast of Jeonnam in where was not damaged by crude oil.
Observations on seaweed attachment to bivalve shells in Peter the Great Bay (East Sea) and their taphonomic implications
Lutaenko, Konstantin A. ; Levenets, Irina R. ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 221~232
DOI : 10.9710/kjm.2015.31.3.221
Observations in beach, intertidal and upper subtidal environments in Peter the Great Bay (north-western East Sea) have shown that attached algae were found on empty shells of 13 species of epifaunal and infaunal bivalve mollusks. Thirteen algae species were identified on empty dislodged shells but more than 50 species are known to be epibiotic on living bivalves. The dislodgement of shells with attached algae takes place in semi-enclosed, low-energy areas, as well as those which are open and affected by strong wave action, indicating the large scale of this phenomenon. The significance of seaweed transportation of living mollusks and their empty shells in the coastal zone, involving both taphonomic and ecological processes, is stressed. Algae appear to be a taphonomic agent and play a similar role as compared to birds or hermit crabs, but they act passively and contribute to environmental mixing in death assemblages in coastal environments.
Molecular Characterization and Expression Analysis of a Toll-like receptor 2/6 gene from Abalone (Haliotis discus hannai)
Moon, Ji Young ; Park, Eun Hee ; Kong, Hee Jeong ; Kim, Young-Ok ; Kim, Dong-Gyun ; An, Cheul Min ; Nam, Bo-Hye ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 233~241
DOI : 10.9710/kjm.2015.31.3.233
Toll-like receptors (TLRs) are a major pattern recognition receptor that recognize the structure of invading pathogen and play key roles by triggering immune response. In this study, we identified a sequence of TLR homolog and characterized at molecular level from the abalone (Haliotis discus hannai). Multiple alignments and phylogenetic analysis of abalone TLR protein belongs to the TLR 2/6. Expression level of abalone TLR 2/6 in the tissue was comparatively high in the mantle, gill, digestive duct, and hemocytes, but lowest in the muscle. Expression level of abalone TLR 2/6 mRNA in the mantle, gill, digestive duct, and hemocytes was 20-fold, 60-fold, 115-fold, 112-fold higher than in the muscle, respectively. Expression level of abalone TLR 2/6 mRNA in the mantle was steadily increased until 12 h and decreased post-infection with Vibrio parahemolyticus. While the expression level of abalone TLR 2/6 mRNA in the gill and hemocytes was drastically increased at 6 and 9 h post-infection with Vibrio parahemolyticus, respectively. These results suggest that abalone TLR 2/6 is conserved through evolution and may play roles similar to its mammalian counterparts.
Construction of PANM Database (Protostome DB) for rapid annotation of NGS data in Mollusks
Kang, Se Won ; Park, So Young ; Patnaik, Bharat Bhusan ; Hwang, Hee Ju ; Kim, Changmu ; Kim, Soonok ; Lee, Jun Sang ; Han, Yeon Soo ; Lee, Yong Seok ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 243~247
DOI : 10.9710/kjm.2015.31.3.243
A stand-alone BLAST server is available that provides a convenient and amenable platform for the analysis of molluscan sequence information especially the EST sequences generated by traditional sequencing methods. However, it is found that the server has limitations in the annotation of molluscan sequences generated using next-generation sequencing (NGS) platforms due to inconsistencies in molluscan sequence available at NCBI. We constructed a web-based interface for a new stand-alone BLAST, called PANM-DB (Protostome DB) for the analysis of molluscan NGS data. The PANM-DB includes the amino acid sequences from the protostome groups-Arthropoda, Nematoda, and Mollusca downloaded from GenBank with the NCBI taxonomy Browser. The sequences were translated into multi-FASTA format and stored in the database by using the formatdb program at NCBI. PANM-DB contains 6% of NCBInr database sequences (as of 24-06-2015), and for an input of 10,000 RNA-seq sequences the processing speed was 15 times faster by using PANM-DB when compared with NCBInr DB. It was also noted that PANM-DB show two times more significant hits with diverse annotation profiles as compared with Mollusks DB. Hence, the construction of PANM-DB is a significant step in the annotation of molluscan sequence information obtained from NGS platforms. The PANM-DB is freely downloadable from the web-based interface (Malacological Society of Korea, http://malacol.or/kr/blast) as compressed file system and can run on any compatible operating system.
First report of an aeolid nudibranch Flabellina athadona and an identification key for the genus Flabellina from Korea
Jung, Daewui ; Park, Joong-Ki ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 249~252
DOI : 10.9710/kjm.2015.31.3.249
An aeolid nudibranch species Flabellina athadona (Bergh, 1875) is newly recorded from Korean waters. This species is distinguished from other congeneric species by the following characteristics: translucent white body, deep orange colored digestive glands, plenty of white specks, and a reversed Y-shaped marking on the head between rhinophores and oral tentacles. In this report, we also provide an identification key for the genus Flabellina in Korea, photographs, and diagnostic characteristics of F. athadona. Molecular identification using mtDNA cox1 partial sequences is also provided to help differentiate F. athadona from some of its closely related congeneric species.
A New Record of Amalda rubiginosa (Olividae: Gastropoda) from Korea
Lee, Sang-Hwa ; Park, Tae Seo ; Park, Joong-Ki ;
The Korean Journal of Malacology, volume 31, issue 3, 2015, Pages 253~255
DOI : 10.9710/kjm.2015.31.3.253
The family Olividae includes predatory species with medium-sized, glossy, elongated oval-shaped shell. As sand-dwellers, they are broadly distributed in tropical and subtropical oceans. They feed mostly on other mollusks and carrions including sea snails and bivalves. To date, two species in the genus Amalda (subfamily Ancillinae) have been reported in Korean waters. In this study, Amalda rubiginosa (Swainson, 1823) was collected from Korean waters and morphologically described in details as a first record.