• 한국패류학회지
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• 제28권1호
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• pp.55-64
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• 2012

Ultrastructural studies of germ cell development during spermatogenesis and taxonomic values in mature sperm morphology of Argopecten irradians irradians were investigated by transmission electron microscopic observations. In the early stage of spermatid during spermiogenesis, a few granules and proacrosomal granules are formed by the Golgi complex. In the late stage of spermatid during spermiogenesis, a proacrosomal vesicle becomes an acrosomal vesicle in the acrosome through spermiogenesis. The sperm is approximately $ 45-48{\mu}m$ in length including a jar-shaped sperm nucleus (about $1.45{\mu}m$ long), an acrosome (about $0.34{\mu}m$ long) and tail flagellum. The axoneme of the sperm tail shows a 9+2 structure. As one of common characteristics of mature sperm morphologies in Pectinidae species in subclass Pteriomorphia, mature spermatozoon consists of the cone-shaped acrosomal vesicle and subacrosomal material on the invaginated jar-shaped nucleus. The acrosomal vesicle of this species is composed of electron high dense opaque part (material) from the base to the tip, as have seen in the species in the subclass Pteriomorphia. Exceptionally, five mitochondria are found in the sperm midpiece of this species, unlike four in most species of Pectinidae in subclass Pteriomorphia. However, the acrosomal vesicle of spermatozoa of A. irradians irradians resemble to those of other investigated Pectinidae species in subclass Pteriomorphia. Therefore, we can use sperm morphology as a tool in the resolution of taxonomic relationships within the Pectinidae species. These morphological charateristics of acrosomal vesicle belong to the family Pectinidae in the subclass Pteriomorphia.

• 한국패류학회지
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• 제26권1호
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• pp.45-49
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• 2010

Up until now, we have identified 17 exotic species of Mollusca in Korea. These include Achatina (Lissachatina) fulica, Limax flavus, Limax marginatus, Deroceras reticulatum, Hawaiia minuscula, Zonitoides yessoensis, Zonitoides arboreus, Physa acuta, Pomacea canaliculata, Pomacea insularus, Crepidula (Crepidula) onyx, Mytilus galloprovincialis, Xenotrobus securis, Perna viridis, Argopecten irradians irradians, Pinctada fucata, and Pinctada margaritifera. Among them Achatina (Lissachatina) fulica, Pomacea canaliculata, Pomacea insularus, Argopecten irradians irradians, Pinctada fucata, and Pinctada margaritifera were intentionally introduced, whereas remainings were unintentionally introduced into Korean fauna. These foreign species can be divided into three groups on the basis of their habitats: A. fulica, L. flavus, L. marginatus, D. reticulatum, H. minuscula, Z. yessoensis, and Z. arboreus in terrestrial habitat; P. acuta, P. canaliculata, and P. insularus in fresh water; and C. onyx, M. galloprovincialis, L. fortuneikikuchii, P. viridis, A. irradiansirradians, P. fucata, and P. margaritifera in sea water. Taxanomically, 11 species belong to Gastropoda, whereas 6 species are classified to Bivalvia.

• 한국수산과학회지
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• 제35권3호
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• pp.201-206
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• 2002

1996년 9월 16일에 중국산 해만가리비 (Argopecten irradians)를 전라남도 장홍군 득량만 해역에 이식한 후 1997년 8월까지 연승수하식으로 양성하면서 생식주기에 관한 조사를 하였다. 연체부 및 폐각근 중량지수의 월별 변화는 10월부터 증가되기 시작하여 11월에 각각 연중 최고치 (48.6 및 36.2)를 보인 후 12월부터 5월까지 점차 감소하였다. 생식소중량지수는 3월에 증가하기 시작하여 4월에 최대 (20.3)에 이른 후 5월부터 12월까지 점차 감소하였다. 우리나라 남해안에 이식된 해만가리비의 생식주기는 초기활성기 (10$\~$2월), 후기활성기 (11$\~$5월), 완숙기 (2$\~$5월), 산란기(5$\~$6월), 퇴화 및 비활성기 (6$\~$8월)의 연속적인 5단계로 구분할 수 있었으며, 산란성기는 수온 18^{\circ}C 내외인 5월이었다.

• 한국패류학회지
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• 제29권3호
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• pp.239-244
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• 2013

Mass mortalities of farmed shellfish, mostly in summer season, thus named mass summer mortalities, have been a global issue in shellfish aquaculture. The 2013 mass summer mortalities in the confined waters of Goseong Bay, Goseong, Korea were quite a unique and intensive for two farmed species, the Pacific oysters, Crassostrea gigas, and bay scallops, Argopecten irradians. The mortalities were progressive from the bottom of the suspended oysters and caged scallops in the waters, reaching up to 80% for the oyster and 95% for the scallop in about 20 days after the first occurrence, early August, 2013. We monitored a wide range of environmental factors, including water temperature, dissolved oxygen (DO), salinity, turbidity, acidity (pH), organic and inorganic matters, chemical oxygen demand (COD), suspected pathogenic agent, and phytoplankton composition throughout the water column where the two species were suspended or caged. Our survey concluded that the hypoxia or anoxia might be a major cause of the mortalities. Here, we detailed the mortalities and ways to arrive at the conclusion.

• 한국패류학회지
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• 제19권1호
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• pp.19-24
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• 2003

중국에서 이식하여 어미패로 양성한 해만가리비를 수온 17.1-23.2$^{\circ}C$로 44 일간 Isochrysis galbana 등 5종의 먹이생물을 혼합시켜 공급하면서 성숙을 유도하여, 1997 년 1월 29일 및 31일 2회에 걸쳐 간출과 수온 자극을 가하여 총 4,532만개의 수정란 (평균 52 ${\mu}m$) 을 채란하였다. 난 발생 단계를 조사한 결과, D형 유생의 크기는 평균 77.5 × 63.8 ${\mu}m$이었고, 부착기 유생은 191.8 × 181.2 ${\mu}m$의 크기였으며, 부착기 유생은 이 크기에서 파판에 부착하여 치패로 발달하였다. 이 치패는 2월 14일부터 5월 7일까지 수온 22.8-26.3$^{\circ}C$, 염분 31.0-34.4에서 실내 사육한 결과, 평균 각장 3.04 mm로 성장하였다. 비단가리비의 경우는, 부착기의 부착유생들은 채묘기(collector) 에서 떨어지면 폐사하게 되는데, 이것은 Argopecten balloti에서 나타나는 바와 같이, 족사에 의한 부착기간이 짧아서가 아니라 부착유생들이 각기 소수의 족사를 가지기 때문에 채묘기에 대한 부착력이 약하여 부착유생의 생존율이 비교적 낮았던 것으로 사료된다.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 1997년도 수산관련공동학술대회발표요지집
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• pp.165.2-166
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• 1997

• 한국수산과학회지
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• 제52권3호
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• pp.241-246
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• 2019

To understand the characteristics of paralytic shellfish poisoning in a major production area of the bay scallop Argopecten irradians in Korea, the seasonal variation and anatomical distribution of paralytic shellfish toxin (PST) were determined in bay scallops collected from the Gyeongnam coast of Korea from March to May 2018. PST levels in bay scallops in the survey area showed remarkable seasonal variation. PST was first detected at a level of 0.42 mg/kg on April 2, 2018, and the highest toxin level (3.15 mg/kg) was recorded on April 12. Among the tissues of bay scallops, the highest proportion of PST was found in the viscera ($54.9%{\pm}17.8%$), followed by the adductor ($22.8%{\pm}10.9%$), gonads ($8.9%{\pm}4.6%$), gills ($7.1%{\pm}3.7%$), and mantle ($6.3%{\pm}.8%$). In addition, with higher PST levels in the whole tissues of bay scallops, the proportion of PST in the viscera increased, whereas those in the mantle, gill, and gonad tissues decreased. In a high-toxicity group with more than 2.0 mg/kg PST in the whole tissues, the proportion of PST in the viscera was $71.8%{\pm}6.7%$.

• 한국수산과학회지
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• 제34권2호
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• pp.137-144
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• 2001

Sequences of partial 18S rDNA have been analyzed to elucidate genetic diversity of scallops collected around Korean sea, The scallops used in genetic comparison are Argopecten irradians concentricus, Amusium japonicum japonicum, Chlamys farreri farreri, Chlamys (Swiftopecten) swifti and Patinopecten yessoensis. The 18S rDNA sequences were aligned by Clustalx program. Phylogenetic tree was drawn by Treecon program, The scallops were divided into two groups-the Family Pectinidae containing A. japonicum japonicum and the Family Propeamussiidae containing Argopecten, Chlamys and Patinopecten genera. The Family Propeamussiidae was also divided into the Supergenera Aequipecten containing A. irradians concentricus and Supergenera Chlamys containing C. farreri farreri, C. swifti and P. yessoensis. The species of C. swifti was closer to the P. yessoensis rather than C. farreri farreri in respect to nuclear 18S rDNA sequence.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2003년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.382-383
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• 2003

해만가리비(Argopecten irradians)는 미국의 대서양 연안과 걸프만이 원산지로 중국에서는 1982년 미국에서 이식한 이래 많은 양식생산이 이루어지고 있으며, 우리나라에서는 1996년 국립수산과학원 남해수산연구소에서 새로운 양식품종으로 개발하고자 최초로 이식하여 실내에서 인공종묘생산으로 치패를 생산한 바 있다. 국내에서는 연구로는 동절기 성장(Oh and Jung, 1999), 밀도별 성장(Oh et al. 2000), 양식 생물학적연구(Oh, 2000), 수심별 성장(Oh et al., 2002) 생식주기(Oh et al., 2002), 선발효과(Oh et al., 2002)등에 관한 연구를 수행한 바 있으며, 외국에서는 산란 및 생식상태(Loosanoff and Davis, 1963; Taylor and Capuzzo, 1983; Hampson and Capuzzo. (중략)

• 한국패류학회지
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• 제15권2호
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• pp.71-79
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• 1999

To develop new products for aquaculture, which fishermen at South Sea can get high income, after bay scallop was transplanted from Sandong province in China from October 17, 1996 to March 18, 1997 at Duekrang Bay in Janghung gun and Kamak Bay in Y대녀 City on Chollanam province, Sumjin river estuary in Hadong gun and Gejae Bay in Keoje city on Kyongsangnam proince. Temperature was decreased from 20.5$^{\circ}C$ to 5.1$^{\circ}C$ in February and then it was increased to 12.0 in March. Ranges of salinity, DO and Chlorophyll-a were 22.40-34.70 psu, 5.24-9.77 mg/l and 1.27-22.28 $\mu\textrm{g}$/l, respectively, and low temperature, sudden changes of salinity and low concentration of chlorophyll-a influenced the growth of bay scallop. bay scallop in the rearing period showed the fastest growth from October 17 to November 18 through the every size rages, while it grew slowly or stopped growing from December 18 to March 18. Among 4 transplanted areas, young scallop at Duekrang Bay showed the fastest growth and then Kamak Bay, Gejae Bay, Sumjin estuary in order. The daily growth rate of young scallop in the middle size range (5.70%) was higher than those in large (2.07%) and small (5.49%) size range. The meat weight index showed the highest in December. Survival rates from October to December were high, not related to the size ranges, but survival rate of the small young scallop from January to March was higher than Those of the rest. As the Result, transplanted bay scallop at South Sea was shown to grow by the middle of December (around 1$0^{\circ}C$ temperature).