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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Korean Journal of Malacology
Journal Basic Information
Journal DOI :
The Malacological Society of Korea
Editor in Chief :
Volume & Issues
Volume 25, Issue 3 - Dec 2009
Volume 25, Issue 2 - Aug 2009
Volume 25, Issue 1 - May 2009
Selecting the target year
Two Unrecorded Molluscan Species (Atrina teramachii and Liocranchia reinhardti) from Korean Waters
Son, Min-Ho ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 91~92
Two molluscan species belonging to Bivalvia (Atrina teramachii Habe) and Cephalopoda (Liocranchia reinhardti Steenstrup) were found new to the Korean malacofauna. The author report, consequently, two additional molluscan species new to the fauna with figures and remarks on slight morphological variation comparing to the original and previous descriptions.
A Report on the Mass Mortality of the Farmed Japanese Scallop, Patinopecten yessoensis on the Korean Coasts of the East Sea
Jo, Q-Tae ; Kim, Su-Kyoung ; Lee, Chu ; Rahman, Mohammad M. ; Lee, Chae-Sung ; Oh, Bong-Se ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 93~96
Unexpected mass mortality has been one of the drawbacks in front of the stable production of Japanese scallop (Patinopecten yessoensis) on the Gangwon coasts of the East Sea. The preliminary data from our routine observation revealed that the mortality appeared to be related to variation of water temperature in the farming site and the degree of the mortality was dependent on scallop strain. The present study performed to verify the preliminary findings exhibited that the mortality was closely related to daily temperature variation rather than monthly variation. Daily temperature variation was particularly damageable to the scallop during the temperature elevation period. Scallops from hatchery seeds (Chinese strain) were more tolerant against the temperature variation over those from wild seeds. The hatchery scallop gain of the temperature tolerance was probably due to their larval experience to higher temperature in the hatchery as well as their maternal genetic acclimation to upper temperature extreme of the Chinese environment which was recently found.
Fundamental Study about Bottom-Clinging Rate in Free Floating Larva by Infiltration Flow in Tidal
Back, Sang-Ho ; Park, Kwang-Jae ; Park, Young-Je ; Cheon, Jun-Je ; Cho, Kee-Chae ; Kim, Yi-Un ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 97~103
It is a research that free floating larva of Ruditapes philippinarum in compliance with infiltration flow of tidal accumulation and bottom-clinging system in high density also, It is a precondition this for the continuous augmentation of Ruditapes philippinarum resources. So in flow field of tidal the free floating larva produced the infiltration water tank that can possibly bottom-clinging and experiment the water tank which uses free floating larva, It evaluates that the acceleration effect of free floating larva by infiltration in objective. As a result, 1) The experiment on free floating larva's bottom sediment grain diameter came to be high recording as bottom-clinging rate at the static water field and even biologically it selects bottom-clinging substrate it will be able to confirm. 2) About occurrence of infiltration flow field is in case of that: the drift of a current 10cm/s, bottom sediment grain 1.21mm infiltration flow 0.3cm/s increase of 3~5 times was confirmed. 3) From free floating larva of Ruditapes philippinarum the choice of bottom sediment grain diameter depends in the biological factor and form the flow field the bottom-clinging acceleration effect was controled over physical stable condition. 4) In case of density of Ruditapes philippinarum free floating larva of sea area, bottom sediment grain diameter, flow condition which are very cleanly in the research that possibly could conjecture the free floating larva's bottom-clinging rate.
Induction of Sex Maturation and Growth in Comb Pen Shells, Atrina pectinata per Microalgae Classes
Moon, Tae-Seok ; Jo, Pil-Gue ; Kim, Byoung-Hak ; Park, Ki-Yeol ; Ku, Hag-Dong ; Shin, Yun-Kyung ; Lym, Young-Sub ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 105~112
We investigated the degree of obesity, histological development stages of gonads and sexual maturation induction rates of comb pen shell, Atrina pectinata, per the type of micro-algae supplied. Terms of maturation by singular or mixed supply of microalgae, it was found that maturation of the female was the quickest at 60.0% by the Tetraselmis tetrathele (Tet). experiment group followed by 57.1% by the Chlorella ellipsoidea (Chl). experiment group and 16.7% by the Phaeodactylum tricornutum (Pha). experiment group. However, there were no significant differences between Tet. experiment group and Chl. experiment group. As for the male, maturation was the quickest at 60.0% by the Tet. experiment group followed by 16.7% by the Chl. experiment group and 14.3% by the Pha. experiment group. In light of these results, Tet. is concluded to be a very useful feed organism in breeding the mother comb pen shells. Upon completion of the experiment, the sexual maturation induction rate for the female was found to be the highest at 82.0% in the Tet. experiment group followed by 72.0% by the Chl. experiment group, 64.0% by the Pha. experiment group and 58.0% by the mixed micro-algae experiment group. During the period of experiment, the survival rate was the highest at 94.4% by the mixed micro-algae experiment group followed by 90.0% by the Pha. experiment group, 83.1% by the Tet. experiment group and 78.8% by the Chl. experiment group.
Effect of Temperature on Induced Sexual Maturation of the Hard Clam, Meretrix petechiails (Lamarck) Broodstock
Kim, Byoung-Hak ; Moon, Tae-Seok ; Park, Ki-Yeol ; Jin, Young-Guk ; Shin, Yun-Kyung ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 113~119
Artificial induction of maturation by heating of the hard clam, Meretrix petechiails (Lamarck) broodstock was investigated from 25 May to 30 June in 2008. We experimented maturation by keeping the breeding water temperature at 20, 25 and
and as the natural water temperature and found the following results. In case of the female, maturation was the quickest in the experiment group of
and the maturation tended to be slower as the water temperature was lower. The similar trend was displayed among the male. At experiment completion, maturation induction rate was found to be the highest at 46.0% in the experiment group of
followed by 35.0% in the experiment group of
, 18.0% in the experiment group of natural water temperature and 12.0% in the experiment group of
. During the period of the experiment, the survival rate was of 90% or more in all groups.
Effect of Temperature Condition on Growth of Juvenile Abalone, Haliotis discus hannai with the Different Feeds
Cho, Sung-Hwoan ; Cho, Young-Jin ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 121~126
This study was performed to determine the effect of temperature condition on growth of juvenile abalone Haliotis discus hannai with the different feeds. Two types of feed (dry sea tangle and experimental diet) at water temperatures of 20 and
, and 23 and
were applied to experimental abalone twice. Forty-five juvenile abalone averaging 10.1 g in the first feeding trial and 11.5 g in the second feeding trial were randomly stocked into 6 of 50 L plastic rectangular containers each. Fishmeal, soybean meal and shrimp head meal was used as the primary protein source in the experimental diet. And dextrin and wheat flour, and soybean oil were used as the primary carbohydrate and lipid sources in the experimental diet, respectively. The dry sea tangle and experimental diet were fed to abalone once a day at the ratio of 1.5-2.0% total biomass of abalone with a little leftover in each experimental condition. Weight gain of abalone was significantly affected by feed type, but not by water temperature in the first feeding trial. Regardless of water temperature, weight gain of abalone fed the experimental diet was significantly higher than that of abalone fed the dry sea tangle. However, weight gain of abalone was significantly affected by water temperature, but not by feed type in the second feeding trial. Weight gain was highest in abalone fed the experimental diet at
, followed by abalone fed the dry sea tangle at
, abalone fed the experimental diet and dry sea tangle at
, which was lowest. Moisture and crude protein content of the edible portion of abalone was significantly affected by feed type, but not by water temperature in the second feeding trial. However, ash content of the edible portion of abalone was significantly affected by water temperature, but not by feed type. In considering these results, it can be concluded that the well formulated feed was superior to the dry sea tangle for growth of juvenile abalone, and water temperature conditions of 20 and
seemed to be better than
to improve weight gain of abalone.
Maturity and Spawning Period of the Common Octopus, Octopus vulgaris in the South Sea of Korea
Kang, Hyun-Jung ; Kim, Yeong-Hye ; Kim, Sung-Yeon ; Lee, Dong-Woo ; Choi, Young-Min ; Chang, Dae-Soo ; Gwak, Woo-Seok ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 127~133
The common octopus, Octopus vulgaris is commercially important species in Korea. Korean fishing vessels have actively caught it. However, the study of this species has been poorly known. Therefore, the purpose of this study is to provide information about maturation and spawning period of this species. Samplings have been monthly collected in Tongyoung and Sacheon of Gyeongsangnam-do, using traps. A total of 748 individuals were sampled from February 2007 to January 2008. We analyzed monthly changes in maturity stages, gonadosomatic index, total weight at 50% group maturity. The octopus total weight was between 128.6 and 3381.4 g. Females were distributed between 129.8 and 3381.4 g and males between 128.6 and 2378.4 g. The spawning periods were May to June and September. The total weight at 50% group maturity was estimated to be 919.6 g.
Cellular Immune Responses of the Manila Clam, Ruditapes philippinarum, Exposed to Cadmium Chloride
Park, Kyung-Il ; Choi, Min-Soon ; Park, Sung-Woo ; Park, Kwan-Ha ; Choi, Sang-Hoon ; Yoon, Jong-Man ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 135~143
The Manila clam, Ruditapes philippinarum, has been considered as a sentinel species due to dominant distribution along the coast of Korea and well developed regulatory system. In order to develop and understand immune responses of the Manila clams, clams were exposed to
of cadmium chloride (Cd) for 8 days and monitored the cellular immune parameters of the hemocytes including blast cell composition, DNA damage, necrosis, apoptosis and hemocyte mortality using a flow cytometer. The results showed that all immune parameters analyzed in the present study increased remarkably compared to the controls and the increases were statistically significant. Apoptosis rate was higher than necrosis rate in the clams exposed to Cd suggesting that apoptosis was preferably induced by the concentration of Cd used in the present study. Our study indicates that the measurement of cellular immune responses of the Manila clam using flow cytometer will be a useful technique for assessment of heavy metal contamination in marine environment.
Ultrastructural Description on Oogenesis of the Melania Snail, Semisulcospira libertina libertina (Gastropoda: Pleuroceridae)
Kim, Eun-Kyoung ; Lee, Jung-Sick ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 145~151
The ultrastructural changes in germ cells during oogenesis of the melania snail, Semisulcospira libertina libertina have been investigated by light and electron microscopy. The ovary is located on the surface of the hepatopancreas in the spiral posterior region. The ovary exhibited greenish color in the gonadal mature season. The ovary was composed of a number of oogenic follicles. Oogenesis was divided into five stages with histological features: (1) oogonia, (2) previtellogenic, (3) initial vitellogenic, (4) active vitellogenic, and (5) mature stages. Oogonia were oval in shape,
in diameter, and had a large nucleus. Previtellogenic oocytes were about
in diameter and the cytoplasm reacted with hematoxylin in H-E satin. Initial vitellogenic stage, oocytes were
in diameter, and small yolk granules of low electron density are scattered in the cytoplasm. Oocytes in the initial vitellogenic stage were connected with ovarian follicle by egg stalk. Active vitellogenic oocyte were
in diameter. Electron density, size and quantity of yolk granules that are distributed in the cytoplasm have increased from the previous stage. Result of TEM observations, the oocyte contains well-developed Golgi complex, endoplasmic reticula and tubular mitochondria in the cytoplasm. Cytoplasm of mature oocyte was filled with proteinaceous yolk globules of high electron density. In this stage, the length of microvilli in the egg envelope was approximately
Phylogenetic Analysis based on Metallothionein Gene Sequence of an Indigenous Species Pisidium (Neopisidium) coreanum in Korea
Baek, Moon-Ki ; Lee, Jun-Seo ; Kang, Se-Won ; Lee, Jae-Bong ; Kang, Hyun-Jung ; Jo, Yong-Hun ; Noh, Mi-Young ; Han, Yeon-Soo ; Choi, Sang-Haeng ; Chae, Sung-Hwa ; Park, Hong-Seog ; Lee, Jun-Sang ; Lee, Yong-Seok ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 153~160
Pisidium (Neopisidium) coreanum is a freshwater snail and lives in spring water near mountain areas. Interestingly, this snail has been traditionally regarded as medicinal food, and thus has been used as folk remedies for healing broken bones. Recently, alpha classification on Pisidium (Neopisidium) coreanum through redescription has been conducted. However, not much attention has been made in beta classification. In this study, we performed the beta classification based on metallothionein (MT) genes found from various organisms. To this end, the complete cDNA sequences were obtained from the Expressed Sequence Tag (EST) sequencing project of Pisidium (Neopisidium) coreanum. The coding region (315 bp) encoded an amino acid sequence of 105 residues. The combined results from BLAST analyses, multiple sequence alignment and molecular phylogenetic study of Pc-MT gene indicate that Pisidium (Neopisidium) coreanum has similarity to freshwater bivalve such as Dreissena polymorpha (zebra mussel), Unio tumidus (swollen river mussel) and Crassostrea ariakensis (suminoe oyster).
The Influence of Water Temperature and Salinity on Filtration Rates of the Hard Clam, Gomphina veneriformis (Bivalvia)
Shin, Hyun-Chool ; Lee, Jung-Ho ; Jeong, Hyo-Jin ; Lee, Jung-Sick ; Park, Jung-Jun ; Kim, Bae-Hoon ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 161~171
The present study was performed to describe the influence of water temperature and salinity on filtration rates of the venus clam, Gomphina veneriformis, a suspension-feeding (filter-feeding) bivalve species. The calmswere collected from the eastern coastal area of Sokcho, Gangneung and Jumunjin at Kangwon-do, Korea, during December 2006 and May 2007. Isochrysis galbana (KMCC H-002) cells as food organisms were indoor-cultured by f/2 medium, and were used to measure the filtration rate of clam. Filtration rates of clam were measured by indirect method. Cell concentration of food organisms were determined by direct counting cells used the hemacytometer under the light microscope. The filtration rates of clams by water temperature sharply increased with temperatures up to
as optimum temperature and above this temperature, the filtration rates decreased exponentially. Venus clams showed very low filtration rates at low salinity (10-15 psu) and maximum values at high salinity (30-35 psu). Regardless of water temperature and salt change, 2-year class clams showed high filtration rates, but low in 4-year-class. Polynomial regression curves with water temperature were shifted to the left in low temperature region. Thermal coefficient
values showed much higher values at low temperature range than at high temperature range, too. These results indicate that the venus clam is more sensitive in cold water. Polynomial regression curves with salinity were shifted to the right in high saline region. According to this study, the venus clam Gomphina veneriformis, subtidal filter-feeding bivalve, was the stenothermal organism, inhabited mainly in low temperature and the stenohaline, in high saline waters.
Fisheries Biology of Bigfin Reef Squid, Sepioteuthis lessoniana in Jeju Island, Korea
Kang, Hyun-Jung ; Kim, Yeong-Hye ; Lee, Eun-Hui ; Lee, Dong-Woo ; Chang, Dae-Soo ;
The Korean Journal of Malacology, volume 25, issue 2, 2009, Pages 173~178
The bigfin reef squid, Sepioteuthis lessoniana is commercially important species in Korea. Korean fishing vessels have actively caught it. However, the reproductive Biology of this species has been poorly known. Therefore, the purpose of this study is to provide information on the reproductive biology of Sepioteuthis lessoniana in Jeju Island, Korea. The bigfin reef squid caught by set net, from June to November 2006. Monthly changes in maturity stages, gonad weight, mantle length at 50% group maturity and sex ratio were investigated. The mantle length of the bigfin reef squid was between 10.6 and 32.1 cm. Maturation and spawning occur all year around, with more intensity from July to September, with peak July. The spawning period was June. The mantle length at 50% group maturity was estimated to be 18.01 cm. Sex ratio was 1:1.4 (male:female). The proportion of female was significantly higher than male (
-test, p > 0.01).