해양환경안전학회지 (Journal of the Korean Society of Marine Environment & Safety)

  • 제23권6호
  • /
  • Pages.684-689
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  • 2017
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  • 1229-3431(pISSN)
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  • 2287-3341(eISSN)
해양환경안전학회 (The Korean Society of Marine Environment and safety)
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저염수에서 이매패류 참굴(Crassostrea gigas)의 패각운동

Shell Valve Movement of Pacific Oysters, Crassostrea gigas, in Response to Low Salinity Water

  • Moon, Suyeon (Department of Oceanography, Pukyong National University) ;
  • Oh, Seok Jin (Department of Oceanography, Pukyong National University)
  • 투고 : 2017.09.14
  • 심사 : 2017.10.28
  • 발행 : 2017.10.31
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초록

본 연구는 참굴(Crassostrea gigas)의 패각운동을 이용하여, 연안역에서 발생하는 저염수에 대한 조기경보가능성을 살펴보았다. 30 psu와 20 psu에서 패각운동은 각각 $7.32{\pm}3.21$회/hr와 $7.11{\pm}3.90$회/hr였으며, 파형과 횟수는 차이가 없었다(t-test, p>0.001). 하지만 10 psu와 5 psu에서는 모든 개체가 폐각상태를 지속하였다. 수온과 염분의 복합실험결과, Group 1(수온 $15^{\circ}C$ ${\times}$ 염분 15 psu)은 20~30 psu에서 보인 패각운동 후(약 2~3시간), 장시간 폐각을 하였다. Group 2(수온 $30^{\circ}C$ ${\times}$ 염분 15 psu)에서는 Group 1의 패각 개폐운동보다 더 빠르고 자주 나타나, 참굴의 생리적인 위기상황에 대한 신호를 나타내었다. 따라서 이러한 파형은 하계 저염수 출현 시 나타낼 수 있는 조기경보 신호로 충분히 활용될 수 있을 것으로 보인다.

We examined the possibility of developing an early monitoring system using the shell valve movement activity of Pacific oyster (Crassostrea gigas) for early detection of low salinity water in coastal areas. At salinity levels of 30 psu and 20 psu, SVMs were detected $7.32{\pm}3.21times/hr$ and $7.11{\pm}3.90times/hr$, respectively, The patterns and times of SVMs were not significantly different between the two experiment phases. However, at 10 psu and 5 psu, shell valves were observed to be permanently closed in all experiments. Under combined condition (Group 1: temperature $15^{\circ}C$ ${\times}$ salinity 15 psu), SVMs were observed from 20 psu to 30 psu over a 2 - 3 hr period, and then remained closed. In Group 2 (temperature $30^{\circ}C$ ${\times}$ salinity 15 psu), SVMs were observed, which indicated that the physiological condition of the oysters reached a critical point. Thus, it may be possible to utilize SVMs as an early warning signal for low salinity water.

키워드

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