Title

An invasion history for Cercopagis pengoi based on mitochondrial gene sequences

Document Type

Article

Publication Date

2001

Publication Title

Limnology and Oceanography

Volume

46

Issue

2

First Page

224

Last Page

229

DOI

10.4319/lo.2001.46.2.0224

Abstract

The predatory cladoceran Cercopagis pengoi has extended its range over the past decade from the Ponto-Caspian basin into the Baltic Sea and the Laurentian Great Lakes. This study employs mitochondrial DNA (mtDNA) sequence analysis to elucidate the invasion corridors exploited during this range expansion. The Caspian and Black Sea populations of C. pengoi exhibit marked genetic divergence, enabling their discrimination as potential sources of the Baltic and Great Lakes populations. The limited mtDNA haplotype diversity detected in the Baltic populations suggests they were founded by a small number of colonists from the Black Sea. The colonization of North America was apparently a result of the transfer of animals from the Baltic Sea in ballast water.

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