| Abstract: | Laughing Gulls (Larus atricilla) were studied along the south Texas coast during 1978-1981 to determine productivity and to evaluate the effects of environmental pollutants on reproduction. The average clutch-size was 2.6, ranging from 2.3-2.8. Sixty-six percent of the eggs hatched and 82% of the pairs hatched at least one egg. Productivity (fledglings/total nests) averaged 1.0 fledgling per nest. DDE and other organochlorine residues were low in eggs (usually <3 ppm wet weight) and were not suspected of causing reproductive problems. However, organophosphate pesticides sprayed on crops near the study areas reduced productivity by as much as 33% during 3 of 4 years, implying that certain of these chemicals may pose serious threats to the population. |
| Genre: | Article |
| ProdID: | 5221806 |
| Citation Author: | White, D.H.; Mitchell, C.A.; Prouty, R.M. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 551 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Wilson Bulletin |
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| Citation Number Of Pages: | 12 |
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| Citation Phsyical Description: | 540-551 |
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| Citation Search Results Text: | Nesting biology of laughing gulls in relation to agricultural chemicals in south Texas, 1978-81; 1983; Article; Journal; Wilson Bulletin; White, D.H.; Mitchell, C.A.; Prouty, R.M. |
| Citation Start Page: | 540 |
| Citation Volume: | 95 |
| Citation Year: | 1983 |
| Type: | citation/reference |
| Text: | Nesting biology of laughing gulls in relation to agricultural chemicals in south Texas, 1978-81; 1983; Article; Journal; Wilson Bulletin; White, D.H.; Mitchell, C.A.; Prouty, R.M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://elibrary.unm.edu/sora/Wilson/v095n04/p0540-p0551.pdf |
| Date Other: | Wed, 16 Jun 2010 12:19 -0500 |
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