Phylogeographic insights into the invasion history and secondary spread of the signal crayfish in Japan.

ABSTRACT: Successful invasion by nonindigenous species is often attributed to high propagule pressure, yet some foreign species become widespread despite showing reduced genetic variation due to founder effects. The signal crayfish (Pacifastacus leniusculus) is one such example, where rapid spread across Japan in recent decades is believed to be the result of only three founding populations. To infer the history and explore the success of this remarkable crayfish invasion, we combined detailed phylogeographical and morphological analyses conducted in both the introduced and native ranges. We sequenced 16S mitochondrial DNA of signal crayfish from across the introduced range in Japan (537 samples, 20 sites) and the native range in western North America (700 samples, 50 sites). Because chela size is o

SUBMITTER: Usio N 

PROVIDER: S-EPMC4984510 | biostudies-literature | 2016 Aug

REPOSITORIES: biostudies-literature