TY - JOUR
T1 - Pesticide resistance from historical agricultural chemical exposure in Thamnocephalus platyurus (Crustacea
T2 - Anostraca)
AU - Brausch, John M.
AU - Smith, Philip N.
PY - 2009/2/1
Y1 - 2009/2/1
N2 - Extensive pesticide usage in modern agriculture represents a considerable anthropogenic stressor to freshwater ecosystems throughout the United States. Acute toxicity of three of the most commonly used agricultural pesticides (Methyl Parathion® 4ec, Tempo® SC Ultra, Karmex® DF, and DDT) was determined in two different wild-caught strains of the fairy shrimp Thamnocephalus platyurus. Fairy shrimp collected from playas surrounded by native grasslands were between 200% and 400% more sensitive than fairy shrimp derived from playas in agricultural watersheds for Methyl Parathion® 4ec, Tempo® SC Ultra, and Karmex® DF, likely due to the development of resistance. Additionally, reduced sensitivity to DDT was observed among fairy shrimp from agriculturally-impacted playas as compared to those from native grassland-dominated playas. These data suggest that fairy shrimp inhabiting playas in agricultural regions have developed some degree of resistance to a variety of agrochemicals in response to historical usage.
AB - Extensive pesticide usage in modern agriculture represents a considerable anthropogenic stressor to freshwater ecosystems throughout the United States. Acute toxicity of three of the most commonly used agricultural pesticides (Methyl Parathion® 4ec, Tempo® SC Ultra, Karmex® DF, and DDT) was determined in two different wild-caught strains of the fairy shrimp Thamnocephalus platyurus. Fairy shrimp collected from playas surrounded by native grasslands were between 200% and 400% more sensitive than fairy shrimp derived from playas in agricultural watersheds for Methyl Parathion® 4ec, Tempo® SC Ultra, and Karmex® DF, likely due to the development of resistance. Additionally, reduced sensitivity to DDT was observed among fairy shrimp from agriculturally-impacted playas as compared to those from native grassland-dominated playas. These data suggest that fairy shrimp inhabiting playas in agricultural regions have developed some degree of resistance to a variety of agrochemicals in response to historical usage.
KW - Agrochemicals
KW - Fairy shrimp
KW - Pesticides
KW - Resistance
KW - Thamnocephalus platyurus
UR - http://www.scopus.com/inward/record.url?scp=57049132600&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2008.09.010
DO - 10.1016/j.envpol.2008.09.010
M3 - Article
C2 - 18977573
AN - SCOPUS:57049132600
VL - 157
SP - 481
EP - 487
JO - Environmental Pollution
JF - Environmental Pollution
SN - 0269-7491
IS - 2
ER -