Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Toxic Effects of Arsenic and Chromium on the Fertilization and Embryo Development Rates in the Sea Urchin (Hemicentrotus pulcherrimus)

말똥성게(Hemicentrotus pulcherrimus)의 수정 및 배아 발생률에 대한 비소와 크롬의 독성영향

  • Hwang, Un-Ki (National Fisheries Research & Development Institute, West Sea Fisheries Research Institute, Marine Ecological Risk Assessment Center) ;
  • Ryu, Hyang-Mi (National Fisheries Research & Development Institute, West Sea Fisheries Research Institute, Marine Ecological Risk Assessment Center) ;
  • Yu, Jun (National Fisheries Research & Development Institute, West Sea Fisheries Research Institute, Marine Ecological Risk Assessment Center) ;
  • Kang, Han-Seung (National Fisheries Research & Development Institute, West Sea Fisheries Research Institute, Marine Ecological Risk Assessment Center)
  • 황운기 (국립수산과학원 서해수산연구소 해양생태위해평가센터) ;
  • 류향미 (국립수산과학원 서해수산연구소 해양생태위해평가센터) ;
  • 유준 (국립수산과학원 서해수산연구소 해양생태위해평가센터) ;
  • 강한승 (국립수산과학원 서해수산연구소 해양생태위해평가센터)
  • Received : 2013.02.18
  • Accepted : 2013.04.04
  • Published : 2013.06.30
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Abstract

Toxic effects of arsenic (As) and chromium (Cr) has been investigated using the sea urchin (Hemicentrotus pulcherrimus) germ cell and pluteus-larvae. The gametotoxic and embryotoxic effects of As and Cr on H. plucherrimus were each investigated at 6.25, 12.5, 25, 50, 100. Spawning was induced by 0.5 M KCl solution and the normal fertilization and embryogenesis rates were performed for 10 min and 64 hrs after fertilization, respectively. The normal fertilization and embryogenesis rates in the control condition (not including As and Cr) were greater than 94% and 93%, respectively. The fertilization rate was not significantly changed compared with control but embryogenesis rate was significantly decreased with concentration-dependent manner. As and Cr reduced normal embryogenesis rates and a significant reduction occurred at concentration greater than 6.25 ppb (P<0.01) and 25 ppb (P<0.05), respectively. The lowest-observedeffect- concentration (LOEC) of normal embryogenesis rate in As and Cr were each 6.25 and 25 ppb, respectively. From these results, normal embryogenesis rate of H. pulcherrimus have toxic effect at greater than the 6.25 ppb concentration of As and 25 ppb concentration of Cr in marine ecosystems. These results suggest that the normal embryogenesis rates of H. pulcherrimus are very useful test method for the toxicity assessment of heavy metal as As and Cr in marine ecosystems.

말똥성게 (Hemicentrotus pulcherrimus)의 생식세포 및 pluteus 유생을 이용하여 중금속인 Arsenic (As)와 Chromium (Cr)이 정상 수정률 및 배아 발생률에 미치는 독성 영향을 조사하였다. H. pulcherrimus의 수정률 및 배아 발생률에 미치는 As와 Cr의 독성은 6.25, 12.5, 25, 50, 100 ppb의 농도에서 조사하였다. 0.5 M KCl 용액을 이용하여 방란 및 방정을 유도하였고, 정상 수정률 및 배아발생률은 수정 후 각각 10분 및 64시간째 관찰하였다. As와 Cr을 첨가하지 않은 대조구에서 정상 수정률과 배아 발생률은 각각 94%와 93% 이상을 나타냈다. 이들 중금속 첨가에 의해 수정률은 아무런 변화가 나타나지 않았지만 배아 발생률은 농도 의존적 감소하는 것으로 나타났으며, As의 첨가에 의해 배아 발생률은 6.25 ppb에서 유의적으로 감소하였으며 (P<0.01), Cr의 경우는 25 ppb에서 유의적인 감소를 나타냈다 (P<0.05). H. pulcherrimus의 정상 배아 발생률에 대한 LOEC는 As의 경우는 6.25 ppb를 Cr은 25 ppb를 나타냈다. 이들 연구결과로 해양생태계 내에서 As가 6.25 ppb, Cr이 25 ppb를 초과하는 농도일 때는 H. pulcherrimus와 같은 무척추동물의 정상 부화율은 급격히 감소할 것으로 판단된다. 본 연구결과를 바탕으로, H. pulcherrimus의 정상 배아 발생률을 이용한 생물학적 평가방법은 중금속과 같은 유해물질에 대한 해양생태계의 영향을 판단하기 위한 시험방법으로 유용하게 이용될 수 있을 것으로 판단된다.

Keywords

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