Agrichemicals chronically inhibit the cortisol response to stress in fish
•We studied the stress response of Rhamdia quelen following exposure to agrichemicals.•Acute exposure of fingerling-aged fish to agrichemicals chronic inhibits stress response.•The stress axis of fish exposed to MPBI and to TBF were fully recovered after a 180d.•The acute exposure to the tested agri...
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Published in | Chemosphere (Oxford) Vol. 112; pp. 85 - 91 |
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Main Authors | , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier Ltd
01.10.2014
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | •We studied the stress response of Rhamdia quelen following exposure to agrichemicals.•Acute exposure of fingerling-aged fish to agrichemicals chronic inhibits stress response.•The stress axis of fish exposed to MPBI and to TBF were fully recovered after a 180d.•The acute exposure to the tested agrichemicals impairs fish growth and survival.
We studied the stress response of Rhamdia quelen fingerlings at 45, 90, 135 and 180d following acute exposure to agrichemicals. Herein, we report the novel observation that acute exposure of fingerling-aged fish to a methyl parathion-based insecticide (MPBI) and to a tebuconazole-based fungicide (TBF) induced chronic inhibition of the stress response. In contrast, fish exposed to an atrazine–simazine-based herbicide (ASBH) recovered the stress response on day 45, and fish exposed to a glyphosate-based herbicide (GBH) did not present stress response inhibition. Additionally, fish exposed to MPBI, GBH and ASBH showed lower survival rates and attained lower final weights. In the case of TBF, the presence of the stressful stimulus more strongly influenced the changes in the performance parameters than did the agrichemical exposure itself. An impairment of the cortisol response may seriously hamper the adaptive response and the ability to promote the necessary metabolic and ionic adjustments to respond to environmental stress. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0045-6535 1879-1298 |
DOI: | 10.1016/j.chemosphere.2014.02.083 |