| Abstract: | Combinations of the herbicides atrazine and metolachlor and the insecticide chlorpyrifos were tested under both laboratory and field conditions to determine their individual and combined effects on amphibian populations. In the lab Hyla versicolor tadpoles experienced 100% mortality when exposed to a high combination of the pesticides (2.0 mg/L atrazine, 2.54 mg/L metolachlor, 1.0 mg/L chlorpyrifos) whereas low concentrations of the pesticides (0.2 mg/L atrazine, 0.25 mg/L metolachlor, 0.1 mg/L chlorpyrifos) or high concentrations of either herbicides or insecticide alone caused lethargy, reduced growth and delayed metamorphosis but no significant mortality. In the field high herbicide, low insecticide and low herbicide, low insecticide mixtures significantly reduced amphibian populations compared to controls but in the low herbicide, low insecticide wetlands amphibian populations were able to recover through recruitment by the end of the season. |
| Genre: | Conference Paper |
| ProdID: | 70025596 |
| Citation Author: | Mazanti, L.; Sparling, D. W.; Rice, C.; Bialek, K.; Stevenson, C.; Teels, B. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | Linder G.L.Krest S.Sparling D.Little E.E. |
| Citation End Page: | 129 |
| Citation Issue: | 1443 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | ASTM Special Technical Publication |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 19 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Synergistic effects of a combined exposure to herbicides and an insecticide in Hyla versicolor; 2003; Conference Paper; ASTM Special Technical Publication; Mazanti, L.; Sparling, D. W.; Rice, C.; Bialek, K.; Stevenson, C.; Teels, B. |
| Citation Start Page: | 111 |
| Citation Volume: | |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Synergistic effects of a combined exposure to herbicides and an insecticide in Hyla versicolor; 2003; Conference Paper; ASTM Special Technical Publication; Mazanti, L.; Sparling, D. W.; Rice, C.; Bialek, K.; Stevenson, C.; Teels, B. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
| Publisher: | |
