Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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The Survival Rate and the Rate of Attached Egg Sac for Female Tigriopus japonicus Exposure to 4-nonylphenol

4-Nonylphenol에 노출된 Tigriopus japonicus 암컷의 생존율과 포란율

  • 곽인실 (한양대학교 자연과학대학 생명과학과) ;
  • 박명옥 (한양대학교 자연과학대학 생명과학과) ;
  • 이원철 (한양대학교 자연과학대학 생명과학과)
  • Published : 2005.06.01
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Abstract

The aim of this study was to evaluate the attach rate and survival rate for the female harpacticoid Tigriopus japonicus response to 4-nonylphenol, known endocrine disrupter. The organisms were sampled by net sweeping on the Jeju Island in April, 2004 were reared in the laboratory condition. As the concentrations increased, the mortality was slowly increased. The first day for appearing dead individuals was clearly different between control conditions and treated conditions. When the female with egg sac was moved to experimental conditions for the adaptation, the female was dropped the egg sac from the body and then reproduced the egg sac into four to five days. Usually the female in control group recovered egg sac but that in the treated group made egg sac between $89\%\;and\;95\%$ on exposed individuals. The dead individuals for control conditions were showed on ten days after treating chemicals while those for treated conditions were appeared four to six day after exposure to chemicals.

포란한 성충 암컷 Tigriopus japonicus(요각류)를 내분비계 교란물질로 잘 알려져 있는 4-nonylphenol에 노출하여 생존율과 포란율의 변화를 살펴보았다. 실험생물은 2004년 4월 제주도 구안연안에서 플랑크톤망으로 쓸어 잡기로 채집한 후 실내순응을 한 달 동안 시켰다 치사율은 노출농도의 높아지면 증가하였으나 그 경향이 뚜렷하지 않았다. 반면, 노출 후 처음으로 치사한 개체가 발생하는 시기는 비처리군과 처리군에 따라 명백한 차이를 보였다. 포란한 암컷을 실험조건에 이동시키면 생리적인 변동으로 인해 알이 떨어졌다가 $4\~5$일 후 비처리군은 $100\%$ 포란을 회복하지만 처리 군에서는 $89\~95\%$가 회복되어 약제노출에 따른 영향을 보였다. 치사가 발생하는 시기는 비처리 시에는 10일 후부터이지만 노출 시에는 4에서 6일 후부터 발생하였다.

Keywords

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