Survival, growth, and body residues of hyalella azteca (Saussure) exposed to fipronil contaminated sediments from non-vegetated and vegetated microcosms.
We assessed chronic effects of fipronil and metabolite contaminated sediments from non-vegetated and Thallia dealbata vegetated wetland microcosms on Hyalella azteca during wet and dry exposures. Mean sediment concentrations (ng g(-1)) ranged from 0.72-1.26, 0.01-0.69, 0.07-0.23, and 0.49-7.87 for fipronil, fipronil-sulfide, fipronil-sulfone, and fipronil-desulfinyl, respectively. No significant differences in animal survival or growth were observed between non-vegetated and vegetated microcosms during wet or dry exposures. Mean animal body residue concentrations (ng g(-1)) ranged from 28.4-77.6, 0-30.7, and 8.3-43.8 for fipronil, fipronil-sulfide, and fipronil-sulfone. Fipronil-desulfinyl was not detected in any animal samples.
Department of Wildlife and Fisheries, Mississippi State University, Box 9690, Mississippi State, MS 39762, USA. rkroger@cfr.msstate.edu
Robert
R
Kröger
Richard E
RE
Lizotte
Matthew T
MT
Moore
D033304:Amphipoda / Q000737:chemistry / Q000254:growth & development / Q000502:physiology*; D000818:Animals; D001673:Biodegradation, Environmental; D019015:Geologic Sediments / Q000032:analysis; D007306:Insecticides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis; D010944:Plants / Q000737:chemistry / Q000378:metabolism; D011720:Pyrazoles / Q000032:analysis*; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis; D013534:Survival; D032401:Typhaceae / Q000737:chemistry / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis
D007306:Insecticides; D010573:Pesticide Residues; D011720:Pyrazoles; D012987:Soil; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; C082360:fipronil