Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Molecular Identification and Morphological Development of Larvae of Psettina tosana Collected from Southern Sea of Korea

한국 남해에서 채집된 사량넙치 Psettina tosana 자어의 분자 동정 및 형태 발달

  • Ji, Jae-Min (Department of Marine Biology, Pukyong National University) ;
  • Yu, Hyo-Jae (Department of Marine Biology, Pukyong National University) ;
  • Hwang, Kang-Seok (Fisheries Resources Management Division, National Institute of Fisheries Science) ;
  • Park, Jeong-Ho (Fisheries Resources Management Division, National Institute of Fisheries Science) ;
  • Lee, Jeong-Hoon (Fisheries Resources Management Division, National Institute of Fisheries Science) ;
  • Kim, Jin-Koo (Department of Marine Biology, Pukyong National University)
  • 지재민 (부경대학교 자원생물학과) ;
  • 유효재 (부경대학교 자원생물학과) ;
  • 황강석 (국립수산과학원 연근해자원과) ;
  • 박정호 (국립수산과학원 연근해자원과) ;
  • 이정훈 (국립수산과학원 연근해자원과) ;
  • 김진구 (부경대학교 자원생물학과)
  • Received : 2017.11.23
  • Accepted : 2017.12.27
  • Published : 2017.12.31
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Abstract

A total of 15 larvae [3.53~19.49 mm standard length (SL)] belonging to the family Bothidae collected from the southern sea of Korea in 2016 were identified as Psettina tosana based on 434 base-pair sequences of mitochondrial DNA cytochrome c oxidase subunit I. Larvae of Psettina tosana have anterior-most two elongated dorsal fin rays. Uniserial melanophores present on the dorsal and anal fin base, whereas melanophores on the body absent. An inflection point in the relative growth of head length and head depth against SL was shown between 9.93 mm and 10.73 mm SL. The examined larvae of Psettina tosana are clearly distinguished from the most similar species, Psettina iijimae in having no melanophore patches in the proximity of dorsal and anal fin base.

본 연구는 2016년에 한국 남해에서 채집된 둥글넙치과 자어를 분자방법으로 동정하였으며, 자어의 크기별 외부 형태를 상세히 기술하였다. 채집된 자어 15개체 (3.53~19.49 mm 체장)의 mitochondrial DNA (mtDNA) cytochrome c oxidase subunit I gene (COI) 434 bp의 염기서열을 비교한 결과, 모두 사량넙치로 확인되었다. 사량넙치의 자어는 2개의 길게 연장된 등지느러미 기조를 가지며, 등지느러미와 뒷지느러미 기저에 흑색소포가 일렬로 나 있는 반면 체측에는 흑색소포가 없었다. 성장하면서 체장에 대한 두장 및 두고의 비율이 증가 추세에서 감소 추세로 바뀌는 변곡점이 체장 9.93 mm~10.73mm에서 확인되었다. 사량넙치 자어는 형태적으로 가장 유사한 동백가자미(Psettina iijimae)와 달리 등지느러미와 뒷지느러미의 기저 근처에 흑색소포군을 가지지 않는 점에서 잘 구분된다.

Keywords

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