|
KMID : 0613820160260020181
|
|
Journal of Life Science
2016 Volume.26 No. 2 p.181 ~ p.189
|
|
|
Exposure to Dithiopyr Alters Swimming Performance Parameters in Zebrafish
|
|
Oh Jun-Young
Park Eun-Jin
Kang Seong-Eun
Lee Seung-Heon
|
|
|
Abstract
|
|
|
|
The aim of this study was to identify the effects of dithiopyr (DTP), a herbicide, on behavior in zebrafish. The toxicity of DTP has rarely been investigated in fish. In the present study, zebrafish were exposed to different concentrations of DTP in the range of 10-20 μM for 48 h in a test container, in order to measure the value of median lethal concentrations (LC50). Behavioral experiments were performed, including the novel tank test (NTT) and the open field test (OFT), to assess stress responses or locomotion. After exposure to the DTP solution at a sublethal concentration of 2.5?10 μM for 6 min, the behavior of the zebrafish was observed for 6 min. In the acute toxicity test, the LC50 value of DTP showed as 14.49 μM in the zebrafish. The NTT showed that the duration of immobility and the velocity were significantly increased by exposure at a concentration of 5 μM of DTP, compared with a control group (p<0.05). However, compared with the control group, DTP significantly decreased the distance moved and the frequency at the top of the tank, and significantly increased the turn angle and duration at the bottom, in a concentration-dependent manner (p<0.05). In addition, in the OFT, exposure to DTP significantly decreased the distance moved and velocity compared with the control group (p<0.05). Exposure to DTP also significantly increased the duration of immobility, the turn angle, and the meandering movement, in a concentration-dependent manner (p<0.05). Further, exposure to DTP at a low concentration elevated whole-body cortisol levels in the zebrafish. The results of this study thus suggest that DTP induces a toxic response and negative effects on behavior and the endocrine system in zebrafish.
|
|
|
KEYWORD
|
|
|
Behavioral study, dithiopyr, median lethal concentration, whole-body cortisol, zebrafish
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|