The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Distributions of East Asia and Philippines ribotypes of Cochlodinium polykrikoides (Dinophyceae) in the South Sea, Korea

Cochlodinium polykrikoides (Dinophyceae)의 동아시아와 필리핀 유전형의 남해안 분포

  • PARK, TAE GYU (Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science (NIFS)) ;
  • KIM, JIN JOO (Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science (NIFS)) ;
  • SONG, SEON YOUNG (Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science (NIFS))
  • 박태규 (국립수산과학원 남동해수산연구소) ;
  • 김진주 (국립수산과학원 남동해수산연구소) ;
  • 송선영 (국립수산과학원 남동해수산연구소)
  • Received : 2019.06.24
  • Accepted : 2019.08.27
  • Published : 2019.08.31
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Abstract

Fish killing dinoflagellate Cochlodinium polykrikoides has been separated into four genetically differentiated subpopulations globally based on large-subunit (LSU) ribosomal RNA gene, and two subpopulations have been found in the South Sea, Korea. In this study, distributions of the East Asia and Philippines ribotypes were surveyed in the South Sea for 3 years (2014~2016) using quantitative real-time PCR (qPCR). The East Asia ribotype was detected in all sampling stations of the South Sea (Tongyeong~Wando) by 40~100% positives for 2014~2016, whereas the Philippines ribotype was detected in some areas of Tongyeong~Goheung by 1~2% positives for only 2016 when the Tsushima Warm Current (TWC) was particularly strengthened. These results indicate that the East Asia ribotype is the dominant subpopulation in the South Sea, also some of C. polykrikoides swimming cells might be transported from offshore to the South Sea via TWC.

어류폐사 와편모조류인 Cochlodinium polykrikoides는 large-subunit(LSU) ribosomal RNA gene을 기반으로 전 세계적으로 4가지 유전타입이 알려져 있으며, 남해안에는 2가지 유전타입이 출현한다고 보고되었다. 본 연구에서는 C. polykrikoides의 동아시아 타입과 필리핀 타입의 남해안 출현양상을 quantitative real-time PCR(qPCR)을 이용하여 3년간(2014~2016년) 조사하였다. 동아시아 타입의 경우 2014~2016년에 40~100% 비율로 남해안 전 정점(통영~완도)에서 검출이 된 반면, 필리핀타입은 대마난류 유입이 강했던 2016년에만 통영~고흥 일부 해역에서 1~2% 비율로 극미량 검출되었다. 위 결과는 동아시아타입이 남해안의 우점 C. polykrikoides 개체군임을 보여주고 있으며, 일부 유영세포는 대마난류를 따라 외해역으로 부터 유입될 수 있음을 시사한다.

Keywords

References

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