Lethal and sub-lethal effects of the insecticide fipronil on juvenile brown shrimp Farfantepenaeus aztecus

Scientific Reports
Ali Abdulameer Al-BadranMiguel A Mora

Abstract

Chemical pesticides are widely used around the world, but at the same time, they may cause direct or indirect risks to many non-target organisms. Recent increased use of insecticides in coastal areas, for example to control invasive tawny crazy ants, raises concern that insecticides may affect ecologically and/or commercially important species found in estuaries. Here, we investigated the lethal and sub-lethal effects of fipronil on juvenile brown shrimp Farfantepenaeus aztecus over 29 days at five different nominal concentrations (0.1, 1.0, 3.0, 6.4, and 10.0 µg/L) in a laboratory experiment. Exposure to all of the fipronil treatments resulted in all individuals dying before the end of the experiment; whereas, no individual died in the control (0.0 µg/L). The 96-hour LC50 was determined to be 1.3 µg/L. Shrimp also experienced weight loss under all of the fipronil treatments. Inter-moult interval was increased from 12.2 ± 1.64 day in the control group to 15.5 ± 0.53 day in the 1.0 μg/L treatment. Lipid content of shrimp increased significantly in a concentration-dependent manner. Finally, behavioral and body color changes were also observed under the fipronil treatments. We conclude F. aztecus is very sensitive to fipronil and ...Continue Reading

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Citations

Aug 10, 2020·Pest Management Science·Daiana V PerriPatricia C Fernández
Feb 28, 2021·Environmental Science and Pollution Research International·Adam Bownik, Aleksandra Szabelak
Apr 12, 2021·Environmental Science and Pollution Research International·Antonela Santillán DeiúFernando R de la Torre
Jun 14, 2021·Environmental Science and Pollution Research International·Ali Abdulameer Al-BadranDelbert M Gatlin

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