Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 133, Issue -, Pages 489-500Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2016.07.025
Keywords
Synthetic pyrethroid; Chironomidae; Toxicity; Pesticide; Emergence; Chaoberidae
Categories
Ask authors/readers for more resources
We conducted two laboratory bioassays and two field microcosm exposures with bifenthrin (a synthetic pyrethroid) in order to evaluate the capacity of single-species laboratory bioassays to predict lethal and sublethal impacts on aquatic invertebrates in microcosms. For the laboratory species, Chironomus tepperi, larval survival was reduced by 24% at 53.66 mu g/g OC, while adult emergence was reduced at concentrations of 33.33 mu g/g OC and higher, with a 61% decrease at 77.78 mu g/g OC and no emergence at 126.67 mu g/g OC. The abundance of several other microcosm taxa was reduced in the microcosms at a similar concentration range (33.33 mu g/g OC and above), however there was no impact on the abundance of the congeneric species, Chironomus opposites. The differences in impacts between test systems were potentially due to both differing species sensitivity and the interaction of ambient temperature with bifenthrin toxicity. Bifenthrin also was associated with early emergence of Chironomus sp. in both test systems, at concentrations of 10 mu g/g OC and higher (laboratory) and 43.90 mu g/g OC (microcosm), and with a significant decrease in the proportion of C opposites males in a microcosm. These findings indicate that while laboratory bioassays accurately predict many impacts in the field, there are some limitations to the predictive capacity of these tests. (C) 2016 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available