The Use of Zebrafish ( Danio rerio ) Behavioral Responses in Identifying Sublethal Exposures to Deltamethrin

Yi Huang, Jinsong Zhang, Xiaobo Han and Tinglin Huang
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Yi Huang: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710043, China
Jinsong Zhang: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710043, China
Xiaobo Han: Shenzhen Water (Group) Co., Ltd., Shenzhen 518031, China
Tinglin Huang: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710043, China

IJERPH, 2014, vol. 11, issue 4, 1-11

Abstract: Alterations of fish behavioral responses are sensitive indicators to identify accidental chemical pollution. In this research, a series of exposure tests were conducted to investigate behavioral changes of adult zebrafish ( Danio rerio ) exposed to deltamethrin (DM) in six concentrations of 0, 0.15, 1.5, 3.75, 7.5 and 15 ?g/L. Swimming changes in zebrafish were detected at a concentration as low as 1% of the LC 50-24h within five hours. Hyperactivity was the first response, followed by a second response of fish surfacing. The change patterns of swimming speed in zebrafish were similar in all exposure groups, but the degree increased with increasing concentrations. Swimming speed and depth were altered within the first two hours after exposure, which was regarded as the most vital phase for water quality monitoring. The duration of hyperactivity and the time of zebrafish surfacing were both logarithmically correlated with exposure concentrations, which was helpful to distinguish the level of pollution.

Keywords: behavioral response; bio-monitoring; zebrafish; hyperactivity; surfacing (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2014
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