Evolution of rough sculpin (Cottus asperrimus) genetic divergence and late Quaternary displacement on the Hat Creek fault, California, USA

Autor: Steven R. Fong, Damon H. Goodman, Michael Hellmair, Andrew P. Kinziger, Harvey M. Kelsey
Rok vydání: 2016
Předmět:
Zdroj: Conservation Genetics. 17:1257-1267
ISSN: 1572-9737
1566-0621
DOI: 10.1007/s10592-016-0859-9
Popis: The rough sculpin (Cottus asperrimus) is a threatened species whose geographic range in northwestern California, USA is disrupted by Hat Creek fault. We tested whether the fluvial barriers (rapids and waterfalls) produced by this fault have generated significant phylogeographic structure among rough sculpin populations by analyzing variation in microsatellites and mitochondrial DNA. Rough sculpin isolated on either side of Hat Creek fault exhibited significant genetic divergence (microsatellite F ST = 0.36; mitochondrial uncorrected p distance = 1 %). Independently derived estimates for the date of divergence, based upon a molecular clock and upon the age of slip on the Hat Creek fault are concordant and indicate divergence was initiated about 0.5–1 million years ago. Based upon the findings of our genetic analysis and the Pleistocene geologic history of midsections of the Pit River, we present a model of evolution of rough sculpin genetic divergence and late Quaternary displacement on Hat Creek fault. Our findings reveal that rough sculpin exhibit significant population structure and that two management units should be recognized within the species for future conservation planning.
Databáze: OpenAIRE
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