| 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. Embryos of songbirds are potentially at risk from the wildfire control chemicals, Phos-Chek? G75-F and Silv-Ex?. |
| Genre: | Article |
| ProdID: | 5224786 |
| Citation Author: | Buscemi, D.M.; Hoffman, D.J.; Vyas, N.B.; Spann, J.W.; Kuenzel, W.J. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 315 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental Pollution |
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| Citation Number Of Pages: | 4 |
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| Citation Phsyical Description: | 312-315 |
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| Citation Public Comments: | 6766_Buscemi.pdf |
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| Citation Search Results Text: | Effects of Phos-Chek? G75-F and Silv-Ex? on red-winged blackbird (Agelaius phoeniceus) embryos; 2007; Article; Journal; Environmental Pollution; Buscemi, D.M.; Hoffman, D.J.; Vyas, N.B.; Spann, J.W.; Kuenzel, W.J. |
| Citation Start Page: | 312 |
| Citation Volume: | 148 |
| Citation Year: | 2007 |
| Type: | citation/reference |
| Text: | Effects of Phos-Chek? G75-F and Silv-Ex? on red-winged blackbird (Agelaius phoeniceus) embryos; 2007; Article; Journal; Environmental Pollution; Buscemi, D.M.; Hoffman, D.J.; Vyas, N.B.; Spann, J.W.; Kuenzel, W.J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6VB5-4MV1B26-2&_user=696292&_coverDate=07%2F31%2F2007&_rdoc=35&_fmt=summary&_orig=browse&_srch=doc-info(%23toc%235917%232007%23998519998%23652854%23FLA%23display%23Volume)&_cdi=5917&_sort=d&_docanchor=&view=c&_ct=44&_acct=C000038819&_version=1&_urlVersion=0&_userid=696292&md5=dba953a7a3b059ab25e3d2d18162dbf8 |
| Date Other: | Wed, 16 Jun 2010 12:18 -0500 |
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