Discussions aimed at resolution of the Tree of Life are most often focused on the
interrelationships of major organismal lineages. In this study, we focus on the resolution of …

The phylogenetic or evolutionary relationships of species of Cypriniformes, as well as their
classification, is in a era offlux. For the first time ever, the Order, and constituent Families are …

Nonnative fishes have been increasingly implicated in the decline of native fishes in the
Pacific Northwest. Smallmouth Bass Micropterus dolomieu were introduced into the Umpqua …

Body size is one of the most important traits influencing an organism's ecology and a major
axis of evolutionary change. We examined body size disparification in the highly speciose …

Whether active or passive, dispersal accompanied by gene flow shapes the genetic makeup
of populations and ultimately the evolutionary divergence of species. Our objective was to …

Historical events have had a great impact on the biogeography of fishes of western North
America. We examined the genetic variation of the speckled dace (Rhinichthys osculus) to …

Abstract Colorado Pikeminnow Ptychocheilus lucius, the Colorado River's top native
predatory fish, was historically distributed from the Gulf of California delta to the upper …

Western North America is not rich in crayfish species relative to high diversity regions like
the southeastern United States or eastern Australia. Only five species, three subspecies, and …

Background Biogeographers seek to understand the influences of global climate shifts and
geologic changes to the landscape on the ecology and evolution of organisms. Across both …

Abstract In Oregon and Washington coastal streams, there are relatively diverse faunas on
the Olympic Peninsula of Washington (Chehalis fauna), in the lower Columbia River, and on …