Toxicity of carbaryl,diquat dibromide,and fluoranthene,individually and in mixture,to larval grass shrimp,Palaemonetes pugio |
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| Authors: | Katy W Chung Allison R Chandler Peter B Key |
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| Institution: | 1. JHT Incorporated Contractor to National Oceanic and Atmospheric Administration/National Ocean Service/National Centers for Coastal Ocean Service/Center for Coastal Environmental Health and Biomolecular Research (NOAA/NOS/NCCOS/ CCEHBR) , Orlando, Florida, USA;2. College of Charleston , Charleston, South Carolina, USA;3. National Oceanic and Atmospheric Administration/National Ocean Service/National Centers for Coastal Ocean Service/Center for Coastal Environmental Health and Biomolecular Research (NOAA /NOS/NCCOS/CCEHBR) , Charleston, South Carolina, USA |
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| Abstract: | This study examined the toxicity of two pesticides (carbaryl and diquat dibromide) and one polycyclic aromatic hydrocarbon (fluoranthene), both singly and in mixture, to grass shrimp larvae (Palaemonetes pugio). These three chemicals are all present in coastal environments and can easily enter estuarine ecosystems. Fluoranthene was the most toxic chemical with a 96-h LC50 value of 32.45 μ g/L, followed by carbaryl (43.02 μ g/L) and diquat dibromide (1624 μ g/L). In the chemical mixture tests, the binary carbaryl/diquat dibromide mixture and the ternary carbaryl/diquat dibromide/fluoranthene mixture had additive results. |
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| Keywords: | Palaemonetes pugio carbaryl diquat dibromide fluoranthene mixture toxicity pesticides polycyclic aromatic hydrocarbon (PAH) |
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