• 제목/요약/키워드: polychaeta

검색결과 102건 처리시간 0.025초

The First Record of the Marphysa victori (Polychaeta, Eunicida, Eunicidae) from Korea, with DNA Barcode Data

  • Kim, Hana;Kim, Keun-Yong;Phoo, War War;Kim, Chang-Hoon
    • Animal Systematics, Evolution and Diversity
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    • 제37권1호
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    • pp.1-8
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    • 2021
  • A eunicid polychaete, Marphysa victori Lavesque, Daffe, Bonifácio & Hutchings, 2017 is described for the first time from the intertidal zones of the Korean coasts. It is characterized by having three types of pectinate chaetae (INS, isodont-narrow-slender; AWS, anodont-wide-slender; and AWT, anodont-wide-thick), appearance of pectinate chaetae from chaetiger 2, the chaetae consisted of pectinate and compound spinigers, and pygidium with one pair of pygidial cirri. In genetic analysis based on cytochrome c oxidase subunit I (COI), intra-specific genetic distance between the specimens of M. victori from its type locality, France and Korea are in the range of 0.000-0.013. This paper includes the morphological description and photographs of M. victori new to Korean fauna, with partial sequences of the mitochondrial COI as DNA barcode data on this species.

cox1 분자마커를 이용한 한국산 패류 천공성 다모류 Polydora haswelli (Polychaeta, Spionidae) 유전자 다양성 발굴 (Genetic Diversity of Polydora haswelli (Polychaeta, Spionidae) in Korean Shellfish using cox1 Marker)

  • 이순정;김승민;권문경;이상래
    • 한국수산과학회지
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    • 제54권5호
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    • pp.685-690
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    • 2021
  • Harmful shell-boring species of the genus Polydora (Polychaeta: Spionidae) were frequently reported from commercially important mollusk species in Korea, Japan and China. The traditional approach based on the morphological characteristics showed limitations for species discrimination among shell-boring species. Therefore, DNA barcoding was adopted to identify Polydora species using molecular markers. Two Polydora species (P. haswelli and P. hoplura) in abalone shells were reported from our previous molecular phylogenetic study. In this study, we additionally reported the presence of shell-boring Polydora haswelli in commercially sold shellfish. The taxon-specific cox1 marker used in this study successfully allowed the isolation of P. haswelli from cockle Scapharca subcrenata, mussel Mytilus galloprovincialis, oyster Crassostrea gigas and scallop Argopecten irradians. Polydora hoplura was not found in these shellfish species. The genetic variations were found on the intraspecific level of P. haswelli and the same genotype was also detected in different shellfish species. This result can provide information on a new host and accurate parasitic Polydora species. Moreover, this report can be used as the biodiversity data of Polydora species on the invasion and transition of harmful Polydora species in mollusk aquaculture farms.

한국 남해에 출현하는 도다리(Pleuronichthys cornutus)의 식성 (Feeding habits of the ridged-eye flounder, Pleuronichthys cornutus in South Sea, Korea)

  • 김민서;정재묵;이정훈;백근욱
    • 수산해양기술연구
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    • 제60권3호
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    • pp.228-234
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    • 2024
  • To determine the diet of Ridged-eye flounder, Pleuronichthys cornutus in the South Sea of Korea, a total of 207 individuals were collected in 2022 (February, April, May, August, and November) and 2023 (January, February, April, July, and October) by the Fisheries science survey vessels of NIFS. The total length (TL) range of these specimens was from 14.1 to 33.9 cm, and the stomach contents of 100 individuals, not on an empty stomach, were analyzed. Polychaeta was the most important prey component in the diets of P. cornutus based on an Index of relative importance (%IRI) of 55.5%. Followed by amphipoda with a %IRI value of 21.3%. Polychaeta was an important component in diets across all size classes (< 20.0 cm, 20.0-25.0 cm, ≥ 25.0 cm) of P. cornutus; as they grew, the %IRI value of amphipoda decreased and the %IRI value of anthozoa and holothuroidea increased. There was also a significant increase in the mean weight of prey per stomach with growth. P. cornutus consumed polychaeta in all seasons, with spring and autumn being the most dominant seasons. In summer, gastropoda was the dominant prey, and in winter, holothuroidea was the dominant prey.

A New Record of the Genus Pista (Polychaeta: Terebellidae) from Korea: The Validity and Redescription of Pista shizugawaensis

  • Choi, Hyun Ki;Jung, Tae Won;Yoon, Seong Myeong
    • Animal Systematics, Evolution and Diversity
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    • 제31권3호
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    • pp.153-159
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    • 2015
  • A terebellid polychaete identified as Pista shizugawaensis Nishi and Tanaka, 2006, whose species validity has been doubted, is newly reported from the southwest coast of Korea. Korean materials of the present study have several characteristics that agree well with the original description of P. shizugawaensis as follows: two pairs of branchiae on the 2nd and 3rd segments have tufts composed of many dichotomously branched filaments; the nephridial papillae are present on the 6th and 7th segments; the uncini on the anterior and middle thoracic segments possess only long-handled shafts while those on the posterior ones have additional short-handled shafts or lacking shafts; the notosetae are broadly or narrowly winged capillary. The authors examined the taxonomic value of the presence of lateral lobes on the 5th and 6th segments, which has been known as a key characteristic feature of P. shizugawaensis in the classification of Pista species. In the present study, several characteristics such as the shape of notosetae, uncinial shafts in the thoracic segments, and the presence of thin narrow lateral lobes on the 4th segment are suggested as the specific characteristics that help to distinguish P. shizugawaensis from its congeners. A key to Pista species from Korean waters is also provided.

한국 미기록 중국민숭참갯지렁이 Nicon sinica WU and SUN, 1979 (New Record of Nicon Sinica (POLYCHAETA : NEREIDAE) in Yellow Sea, Korea)

  • 백의인
    • 한국수산과학회지
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    • 제30권1호
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    • pp.152-157
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    • 1997
  • 서해의 저층 회색 펄질로 쌓인 $35^{\circ}\;20.1'N.\; 124^{\circ}\;35.6'E.(84m,\;6.7^{\circ}C),\;35^{\circ}C\;51.3'N.,\;124^{\circ}C\;47.8'E.(85m,\;6.2^{\circ}C)$$36^{\circ}\;19.8'N.,\;125^{\circ}\;00.0'E.\;(74m,\;5.7^{\circ}C)$의 3개 지점에서 예인채니기에 의해 채집된 중국민숭참갯지렁이 Nicon sinica Wu and Sun, 1979가 한국 미기록종이었으므로 이종을 기재하고 민숭참갯지렁이 속 Nicon Kinberg, 1866도 우리 나라 다모환충류상에 처음으로 추가되므로 속이 가입되는 참갯지렁이 과 Nereidae의 속 검색표도 새로 작성하였다. 본 종이 추가되므로 한국산 참갯지렁이 과는 모두 13속 34종이 된다.

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