Faculty Publications

Phylogeography Of The Bigeye Chub Hybopsis Amblops (Teleostei: Cypriniformes): Early Pleistocene Diversification And Post-Glacial Range Expansion

Document Type

Article

Keywords

Central Highlands, Cyprinidae, Mitochondrial DNA, Phylogeography, Post-glacial expansion, Pre-Pleistocene diversification

Journal/Book/Conference Title

Journal of Fish Biology

Volume

73

Issue

8

First Page

2021

Last Page

2039

Abstract

The bigeye chub, Hybopsis amblops, is a member of the Central Highlands ichthyofauna of eastern North America. Phylogenetic analyses of the H. amblops species group based on a 1059 bp fragment of the mitochondrial DNA cytochrome b gene did not recover a monophyletic group. The inclusion of Hybopsis hypsinotus in the species complex is questionable. Within H. amblops, five strongly supported clades were identified; two clades containing haplotypes from the Ozark Highlands and three clades containing haplotypes from the Eastern Highlands and previously glaciated regions of the Ohio and Wabash River drainages. Estimates of the timing of divergence indicated that prior to the onset of glaciation, vicariant events separated populations east and west of the Mississippi River. East of the Mississippi River glacial cycles associated with the blocking and rerouting of the Teays River system caused populations to be pushed southward into refugia of the upper Ohio River. Following the most recent Wisconsinan glaciation, populations expanded northward into previously glaciated regions and southward into the Cumberland River drainage. In the Ozarks, west of the Mississippi River, isolation of clades appears to be maintained by the lack of stream capture events between the upper Arkansas and the White River systems and a barrier formed by the Arkansas River. © 2008 The Authors.

Department

Department of Biology

Original Publication Date

12-1-2008

DOI of published version

10.1111/j.1095-8649.2008.02046.x

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