Conservation genetics and demographic history of the endangered Cape Fear shiner (Notropis mekistocholas)

Molecular Ecology
E SaillantJ R Gold

Abstract

We examined allelic variation at 22 nuclear-encoded markers (21 microsatellites and one anonymous locus) and mitochondrial (mt)DNA in two geographical samples of the endangered cyprinid fish Notropis mekistocholas (Cape Fear shiner). Genetic diversity was relatively high in comparison to other endangered vertebrates, and there was no evidence of small population effects despite the low abundance reported for the species. Significant heterogeneity (following Bonferroni correction) in allele distribution at three microsatellites and in haplotype distribution in mtDNA was detected between the two localities. This heterogeneity may be due to reduced gene flow caused by a dam built in the early 1900 s. Bayesian coalescent analysis of microsatellite variation indicated that effective population size of Cape Fear shiners has declined in recent times (11-25 435 years ago, with highest posterior probabilities between 126 and 2007 years ago) by one-two orders of magnitude, consistent with the observed decline in abundance of the species. A decline in effective size was not indicated by analysis of mtDNA, where sequence polymorphism appeared to carry the signature of an older expansion phase that dated to the Pleistocene ( approximately 1...Continue Reading

References

Apr 1, 1975·Theoretical Population Biology·G A Watterson
Jan 1, 1985·Journal of Molecular Evolution·M HasegawaT Yano
Jan 28, 1994·Science·T M Caro, M K Laurenson
Mar 1, 1993·Genetics·Y X Fu, W H Li
Jan 27, 1999·Bioinformatics·D Posada, K A Crandall
Apr 12, 2001·Molecular Ecology·J C Garza, E G Williamson
Nov 13, 2001·Proceedings. Biological Sciences·H A LessiosB D Kessing
Aug 20, 2002·Proceedings of the National Academy of Sciences of the United States of America·Lorenz HauserGary R Carvalho
Dec 12, 2003·Bioinformatics·Julio RozasRicardo Rozas
Nov 1, 1984·Evolution; International Journal of Organic Evolution·B S Weir, C Clark Cockerham
Jan 1, 1989·Evolution; International Journal of Organic Evolution·William R Rice
Oct 1, 1997·Evolution; International Journal of Organic Evolution·Stewart T Schultz, Michael Lynch

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