USGS-NAWQA: PTI
|
Title
| Pesticide Toxicity Index (PTI) for Freshwater Aquatic Organisms |
|---|---|
|
Author
| Munn, M.D., Gilliom, R.J., Moran, P.W., and Nowell, L.H. |
|
Abstract/Summary Statement
| A Pesticide Toxicity Index (PTI) was developed that combines pesticide exposure of aquatic biota (measured concentrations of pesticides in stream water) with acute toxicity estimates (standard endpoints from laboratory bioassays) to produce a single index value for a sample or site. The development of the PTI was limited to pesticide compounds routinely measured in NAWQA studies and to toxicity data readily available from existing databases. Qualifying toxicity data were found for one or more types of test organisms for 124 of the 185 pesticide compounds measured in NAWQA samples, but with a wide range of available bioassays per compound (1 to 232). The PTI can be calculated for specific groups of pesticides and for specific taxonomic groups. Although the PTI does not determine whether water in a sample is toxic to aquatic organisms, its values can be used to rank or compare the toxicity of samples or sites on a relative basis for use in further analysis or additional assessments. The PTI approach may be useful as a basis for comparing the potential significance of pesticides in different streams on a common basis, for evaluating relations between pesticide exposure and observed biological conditions, and for prioritizing where further studies are most needed. |
|
Table of Contents
| Sections include: Abstract Introduction Development of the Pesticide Toxicity Index Applications of the Pesticide Toxicity Index Example Application Limitations of the Pesticide Toxicity Index Summary and Conclusions References Cited |
|
Citation
| Munn, M.D., Gilliom, R.J., Moran, P.W., and Nowell, L.H., 2006, Pesticide toxicity index for freshwater aquatic organisms, 2nd Edition: U.S. Geological Survey Scientific Investigations Report 2006-5148, 81 p. |
|
Method Source
| USGS-NAWQA |
|
Source Organization Country
| USA |
|
Publication Year
| 2006 |
|
Special Notes
| 2nd edition (2006) |
|
Item Type
| Report / Guidance Document |
|
Publication Source Type
|
Government Agency (Federal, USA) |
|
Purpose
|
Data analysis |
|
Design or Data Analysis Objectives
|
Bioassays & toxicity tests Communities & populations Revisit |
|
Complexity
| Medium |
|
Media Emphasized
|
Biological |
|
Media Subcategory
| |
|
Special Topics
|
