| Abstract: | Organochlorine contamination was studied in 8 black-crowned night heron (N. nycticorax) populations nesting in Washington, Oregon and Nevada [USA] in 1978-1980. DDE was detected in 220 eggs sampled; eggshell thickness was negatively correlated with residues of DDE and polychlorinated biphenyls (PCB). Other contaminants were detected in .ltoreq. 35% of the eggs. Except for the 2 Columbia River colonies in which local DDE contamination was a probable compounding factor, a strong north-south clinal pattern of DDE residues among colonies existed. Southern colonies were most contaminated, and productivity was below population maintenance in 1 colony (Ruby Lake). At DDE levels in eggs > 8 ppm, clutch size and productivity decreased, and the incidence of cracked eggs increased. No evidence of breeding-ground DDE-DDT contamination was found except along the Columbia River. |
| Genre: | Article |
| ProdID: | 5221957 |
| Citation Author: | Henny, C.J.; Blus, L.J.; Krynitsky, A.J.; Bunck, C.M. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 13 |
| Citation Issue: | 1 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Journal of Wildlife Management |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 13 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 1-13 |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Current impact of DDE on black-crowned night-herons in the intermountain west; 1984; Article; Journal; Journal of Wildlife Management; Henny, C.J.; Blus, L.J.; Krynitsky, A.J.; Bunck, C.M. |
| Citation Start Page: | 1 |
| Citation Volume: | 48 |
| Citation Year: | 1984 |
| Type: | citation/reference |
| Text: | Current impact of DDE on black-crowned night-herons in the intermountain west; 1984; Article; Journal; Journal of Wildlife Management; Henny, C.J.; Blus, L.J.; Krynitsky, A.J.; Bunck, C.M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://www.jstor.org/stable/3808448 |
| Date Other: | Wed, 16 Jun 2010 12:19 -0500 |
| Publisher: | |
