| Abstract: | DNA sequence analysis of a 215 base-pair region of the mitochondrial cytochrome b gene was used to examine genetic variation and search for evidence of an increased mutation rate in black-crowned night-herons. We examined five populations exposed to environmental contamination (primarily PAHs and PCBs) and one reference population from the eastern U.S. There was no evidence of a high mutation rate even within populations previously shown to exhibit increased variation in DNA content among somatic cells as a result of petroleum exposure. Three haplotypes were observed among 99 individuals. The low level of variability could be evidence for a genetic bottleneck, or that cytochrome b is too conservative for use in population genetic studies of this species. With the exception of one population from Louisiana, pair-wise Phist estimates were very low, indicative of little population structure and potentially high rates of effective migration among populations. |
| Genre: | Article |
| ProdID: | 70006801 |
| Citation Author: | Dahl, Christopher R.; Bickham, John W.; Wickliffe, Jeffery K.; Custer, Thomas W. |
| Citation Contributing Office: | Upper Midwest Environmental Sciences Center |
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| Citation End Page: | 296 |
| Citation Issue: | 5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Ecotoxicology |
| Citation LatN: | 71.4 |
| Citation LatS: | 18.9 |
| Citation LonE: | -66.9 |
| Citation LonW: | 172.5 |
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| Citation Online Only Flag: | |
| Citation Phsyical Description: | 6 p. |
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| Citation Publisher: | Springer |
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| Citation Search Results Text: | Cytochrome b sequences in black-crowned night-herons (Nycticorax nycticorax) from heronries exposed to genotoxic contaminants; 2001; Article; Journal; Ecotoxicology; Dahl, Christopher R.; Bickham, John W.; Wickliffe, Jeffery K.; Custer, Thomas W. |
| Citation Start Page: | 291 |
| Citation Volume: | 10 |
| Citation Year: | 2001 |
| Type: | citation/reference |
| Text: | Cytochrome b sequences in black-crowned night-herons (Nycticorax nycticorax) from heronries exposed to genotoxic contaminants; 2001; Article; Journal; Ecotoxicology; Dahl, Christopher R.; Bickham, John W.; Wickliffe, Jeffery K.; Custer, Thomas W. |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1023/A:1016711401809 |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sun, 1 Jan 2012 00:00 -0600 |
| Publisher: | Springer |
