| Abstract: | Ambient temperature and season have been observed to influence the toxicity of several environmental pollutants in homeotherms. The circannual toxicity of ethyl parathion (EP) was examined in adult European starlings (Sturnus vulgaris). Groups of birds housed in outdoor pens received oral doses of EP (20-150 mg/kg body weight) in fall, winter, spring and summer (temperature range -3.3 to 36.7?C). The median lethal dosage (LD50), and brain and plasma cholinesterase inhibition, were found to be quite similar among seasons. There was some suggestion that EP may have been more toxic during hot weather (winter versus summer LD50 estimate [95% confidence interval]:160 [114-225] vs. 118 [102-136] mg/kg; P<0.10). In view of previous reports in which ambient temperature extremes and harsh weather have enhanced organophosphorus insecticide toxicity to birds, it is concluded that circannual toxicity studies should include measures of sensitivity (acute oral exposure) and vulnerability (dietary exposure) to better predict responses of free-ranging birds |
| Genre: | Article |
| ProdID: | 5223998 |
| Citation Author: | Rattner, B.A.; Grue, C.E. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation Language: | English |
| Citation Larger Work Title: | Society of Environmental Toxicology and Chemistry, Annual Meeting Abstract Book |
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| Citation Phsyical Description: | 205 (abstract no. P359) |
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| Citation Search Results Text: | Absence of circannual toxicity of parathion to starlings; 1990; Article; Journal; Society of Environmental Toxicology and Chemistry, Annual Meeting Abstract Book; Rattner, B.A.; Grue, C.E. |
| Citation Start Page: | 205 (abstr |
| Citation Volume: | 11 |
| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Absence of circannual toxicity of parathion to starlings; 1990; Article; Journal; Society of Environmental Toxicology and Chemistry, Annual Meeting Abstract Book; Rattner, B.A.; Grue, C.E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 16 Jun 2010 12:19 -0500 |
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