Behavioral response is commonly affected by heavy metal toxicity, and behavioral reaction can be measured as sensitive endpoint for sublethal toxicity test and obtained easily and quickly. Also behavioral endpoints may serve as an insightful evaluation tool of the ecological effects of toxic chemicals.
In this study, Heterocypris incongruens (Crustacea: Ostracoda) was selected, which is usually used as an indicater species for water quality. H. incongruens was exposed to copper and arsenic for 5 minute and total distance, velocity, turn angle, and angle velocity were measured for 30 minute using video analysis system in laboratory condition.
Each endpoints reflected the effects of copper and Arsenic toxicity appropriately. These endpoint have possibility that can be used to identify characteristic behavioral responses to metal toxicity.

• Yoon-Hwa Jeong(Division of Environmental Science & Ecological Engineering, Korea University)
• Hyoung-ho Mo(Division of Environmental Science & Ecological Engineering, Korea University)
• Yongeun Kim(Division of Environmental Science & Ecological Engineering, Korea University)
• Yun-Sik Lee(Division of Environmental Science & Ecological Engineering, Korea University)
• Kijong Cho(Division of Environmental Science & Ecological Engineering, Korea University) Corresponding Author