| Abstract: | In San Franciso Bay, California, USA, concentrations of DDE and mercury in eggs differed among Caspian Tern, Forster‘s Tern, Black-crowned Night-Heron, and Snowy Egret in 1982. Geometric mean DDE concentrations were higher (P < 0.05) in Caspian Tern eggs (6.93 ppm, wet weight) than in eggs of other species (1.92-2.84 ppm). Mean mercury concentrations were significantly greater in Caspian Tern (1.25 ppm) and forster‘s Tern (0.90 ppm) eggs than in night-herons (0.41 ppm), but night-heron eggs contained higher concentrations of mercury than did the eggs of Snowy Egrets (0.21 ppm). There were no significant differences among species for mean concentrations of trans-nonachlor or PCBs; other organochlorines occurred in fewer than half of the samples, so means were not compared. Caspian Tern eggs from San Francisco Bay had higher PCB concentrations (4.85 ppm) than did eggs of this species from San Diego Bay, California (1.70 ppm) or Elkhorn Slough, California (1.83 ppm), but we detected no significant differences in mean concentrations of other organochlorines. DDE concentrations in 5 of 47 (10.6%) night-heron eggs from San Francisco Bay exceeded 8 ppm, a level associated with impaired reproduction in this species. DDE concentrations were negatively correlated with eggshell thickness in night-herons and egrets. |
| Genre: | Article |
| ProdID: | 5220777 |
| Citation Author: | Ohlendorf, H.M.; Custer, T.W.; Lowe, R.W.; Rigney, M.; Cromartie, E. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 94 |
| Citation Issue: | 1 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Colonial Waterbirds |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 10 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 85-94 |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Organochlorines and mercury in eggs of coastal terns and herons in California, USA; 1988; Article; Journal; Colonial Waterbirds; Ohlendorf, H.M.; Custer, T.W.; Lowe, R.W.; Rigney, M.; Cromartie, E. |
| Citation Start Page: | 85 |
| Citation Volume: | 11 |
| Citation Year: | 1988 |
| Type: | citation/reference |
| Text: | Organochlorines and mercury in eggs of coastal terns and herons in California, USA; 1988; Article; Journal; Colonial Waterbirds; Ohlendorf, H.M.; Custer, T.W.; Lowe, R.W.; Rigney, M.; Cromartie, E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://www.jstor.org/stable/1521173 |
| Date Other: | Wed, 16 Jun 2010 12:19 -0500 |
| Publisher: | |
