Effects of Phos-Chek® G75-F and Silv-Ex® on red-winged blackbird (Agelaius phoeniceus) embryos
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Abstract
Effects of field application levels of wildfire control chemicals, Phos-Chek® G75-F (PC) and Silv-Ex® (SE), were examined on red-winged blackbird (Agelaius phoeniceus) embryos. Embryos were more sensitive to PC and SE when eggs were immersed for 10 s at an early developmental stage (days 3–5 of incubation) than at a later stage (days 6–9 of incubation). The LC50 (concentration causing 50% mortality) for early stage embryos exposed to PC was 213.3 g/L (slope = 1.6; 95% confidence interval [CI] = 129.1–326.1). The no observed effect concentration (NOEC) was below 135 g PC/L, which caused a significant increase in embryonic mortality and represents the lowest field coverage level of 1 gal/100 feet2. The LC50 for early stage embryos exposed to SE was 19.8 g/L (slope = 1.5; 95% CI = 11.7–52.2). Significant mortality was observed at 10 g SE/L and marginal at 7.5 g SE/L with an apparent NOEC around 5 g SE/L. Neither chemical resulted in apparent developmental malformations.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Effects of Phos-Chek® G75-F and Silv-Ex® on red-winged blackbird (Agelaius phoeniceus) embryos |
| Series title | Environmental Pollution |
| DOI | 10.1016/j.envpol.2006.10.015 |
| Volume | 148 |
| Issue | 1 |
| Year Published | 2007 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 4 p. |
| First page | 312 |
| Last page | 315 |
| Google Analytic Metrics | Metrics page |