Lethal and sublethal effects of the pyrethroid, bifenthrin, on grass shrimp (Palaemonetes pugio) and sheepshead minnow (Cyprinodon variegatus)

• Published in: Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes Pesticides, food contaminants, and agricultural wastes, 2008-08, Vol.43 (6), p.476-483
• Main Authors: Harper, Heather E, Pennington, Paul L, Hoguet, Jennifer, Fulton, Michael H
• Format: Article
• Language: English
• Subjects: Agnatha. Pisces; Animal, plant and microbial ecology; Animals; Applied ecology; Bifenthrin; bioassays; Biological and medical sciences; Biological Assay; Biomarkers - analysis; Biomarkers - metabolism; catalase; Catalase - analysis; Catalase - metabolism; Cyprinodon variegatus; Decapoda (Crustacea) - drug effects; Decapoda (Crustacea) - growth & development; Dose-Response Relationship, Drug; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on protozoa and invertebrates; Effects of pollution and side effects of pesticides on vertebrates; enzyme activity; Freshwater; Fundamental and applied biological sciences. Psychology; glutathione; Glutathione - analysis; Glutathione - metabolism; Insecticides - toxicity; Larva - drug effects; Larva - growth & development; lethal concentration 50; Lethal Dose 50; Lipid Peroxidation; minnows; Oxidative Stress; Palaemonetes pugio; Palaemonidae - drug effects; Palaemonidae - growth & development; Pyrethrins - toxicity; pyrethroid; shrimp; sublethal; Time Factors; toxicity testing; Water Pollutants, Chemical - toxicity
• ISSN: 0360-1234; 1532-4109
• DOI: 10.1080/03601230802174599

This study investigated the lethal and sublethal effects of the pyrethroid insecticide bifenthrin on adult and larval grass shrimp, Palaemonetes pugio, and adult sheepshead minnows, Cyprinodon variegatus. The effects were determined by conducting 96-h aqueous static renewal tests and 24-h static tests with sediment. Oxidative stress biomarkers, lipid peroxidation, glutathione, and catalase were also assessed. The 96-h aqueous LC 50 value for adult shrimp was 0.020 μ g/L (95% CI: 0.015-0.025 μ g/L) and for larval shrimp was 0.013 μ g/L (95% CI: 0.011-0.016 μ g/L). The 96-h aqueous LC 50 for adult sheepshead minnow was 19.806 μ g/L (95% CI: 11.886-47.250 μ g/L). The 24-h sediment LC 50 for adult shrimp was 0.339 μ g/L (95% CI: 0.291-0.381 μ g/L) and for larval shrimp was 0.210 μ g/L (95% CI: 0.096-0.393 μ g/L). The oxidative stress assays showed some increasing trends toward physiological stress with increased bifenthrin concentrations but they were largely inconclusive. Given the sensitivity of grass shrimp to this compound in laboratory bioassays, additional work will be needed to determine if these exposure levels are environmentally relevant.