The oxicity assesment of Phenanthrene (PHE) has been investigated by using the rate (r) of survival and population growth in rotifer Brachionus plicatilis. The survival rate was determined after 24 h of exposure to PHE. The survival rate of PHE had no effect at a maximum of 300 mg L-1. The r was determined after 72 h of exposure to PHE. It was observed that r in the controls (absence PHE) was greater than 0.5, but that it suddenly decreased with an increased concentration of PHE. PHE reduced r in a dose-dependent manner and a significant reduction occurred at a concentration of greater than 37.5 mg L-1. The EC50 value of r in PHE exposure was 63.7 mg L-1. The no-observed-effect-concentration (NOEC) of r in PHE exposure was 18.8 mg L-1. The lowest-observed-effect-concentration (LOEC) of r in the PHE exposure was 37.5 mg L-1. From the results, the concentration of PHE (greater than 37.5 mg L-1) has a toxic effect on the r of B. plicatilis in natural ecosystems. These results (including NOEC, LOEC and EC50) might be useful for the Polycyclic aromatic hydrocarbons (PAHs) toxicity assessment in marine ecosystems.

서 론
 재료 및 방 법
  1. 시험생물
  2. Phenanthrene 농도 조성
  3. 생존율
  4. 개체군 성장률
  5. 통계분석
 결 과
  1. 생존율 변동
  2. 개체군 성장률 변동
  3. 생존 및 개체군 성장률을 이용한 독성평가
 고 찰
 적 요
 REFERENCES

• 황운기(국립수산과학원 서해수산연구소 해양생태위해평가센터, Marine Ecological Risk Assessment Center, West Sea Fisheries Research Institute, NIFS) | Un-Ki Hwang
• 최훈(국립수산과학원 서해수산연구소 해양생태위해평가센터, Marine Ecological Risk Assessment Center, West Sea Fisheries Research Institute, NIFS) | Hoon Choi
• 장수정(국립수산과학원 서해수산연구소 해양생태위해평가센터, Marine Ecological Risk Assessment Center, West Sea Fisheries Research Institute, NIFS) | Soo-Jung Jang
• 허승(국립수산과학원 서해수산연구소 해양생태위해평가센터, Marine Ecological Risk Assessment Center, West Sea Fisheries Research Institute, NIFS) | Seung Heo
• 이주욱(국립수산과학원 서해수산연구소 해양생태위해평가센터, Marine Ecological Risk Assessment Center, West Sea Fisheries Research Institute, NIFS) | Ju-Wook Lee Corresponding author