Authors: Zongming Ren Jinmiao Zha Mei Ma Zijian Wang Almut Gerhardt
Publish Date: 2007/02/10
Volume: 134, Issue: 1-3, Pages: 373-
Abstract
In this paper the movement behavior of Daphnia magna was studied as a bioindicator of organophosphorous pesticide OP contamination using an online biomonitoring method the Multispecies Freshwater Biomonitor® A static test of acute toxicity test revealed the 24h and 48h LC50 values 95 confidence limit for Daphnia magna to be respectively 045 μg/l and 021 μg/l for dipterex 380 μg/l and 090 μg/l for malathion and 125 μg/l and 038 μg/l for parathion The behavior strength of Daphnia magna was a sensitive indicator of sublethal OP stress and resulted in significant concentration–response relationships for the three OPs Increasing OP concentration will result in more intensive behavioral responses of Daphnia magna and shorter response time which could be described by the Stepwise Stress Model SSM Therefore movement behavior can be effectively applied in early warning of environment quality by online biomonitoring The intensive changes in behavior strength of Daphnia magna over a short time follow the SSM concept and can be used as an indicator of early stress response to OP accidental contamination
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