Cytochrome b sequences in black-crowned night-herons (Nycticorax nycticorax) from heronries exposed to genotoxic contaminants

Ecotoxicology
By: , and 

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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.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Cytochrome b sequences in black-crowned night-herons (Nycticorax nycticorax) from heronries exposed to genotoxic contaminants
Series title Ecotoxicology
DOI 10.1023/A:1016711401809
Volume 10
Issue 5
Year Published 2001
Language English
Publisher Springer
Publisher location Amsterdam, Netherlands
Contributing office(s) Upper Midwest Environmental Sciences Center
Description 6 p.
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Ecotoxicology
First page 291
Last page 296
Country United States