The use of zebrafish (Danio rerio) behavioral responses in identifying sublethal exposures to deltamethrin.
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 μg/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.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710043, China. huangyiwater@163.com.
Yi
Y
Huang
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710043, China. zhangjinsong@waterchina.com.
Jinsong
J
Zhang
Shenzhen Water (Group) Co., Ltd., Shenzhen 518031, China. xiaobohan7@gmail.com.
Xiaobo
X
Han
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710043, China. huangtinglin@xauat.edu.cn.
Tinglin
T
Huang
D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring; D007928:Lethal Dose 50; D009570:Nitriles / Q000633:toxicity*; D011722:Pyrethrins / Q000633:toxicity*; D013550:Swimming; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D015027:Zebrafish / Q000502:physiology*
D009570:Nitriles; D011722:Pyrethrins; D014874:Water Pollutants, Chemical; C017180:decamethrin