A Noninvasive Tool to Assess the Distribution of Pacific Lamprey (Entosphenus tridentatus) in the Columbia River Basin
Summary
The Pacific lamprey (Entosphenus tridentatus) is an anadromous fish once abundant throughout coastal basins of western North America that has suffered dramatic declines in the last century due primarily to human activities. Here, we describe the development of an environmental DNA (eDNA) assay to detect Pacific lamprey in the Columbia River basin. The eDNA assay successfully amplified tissue derived DNA of Pacific lamprey collected from 12 locations throughout the Columbia River basin. The assay amplifies DNA from other Entosphenus species found outside of the Columbia River basin, but is species-specific within this basin. As a result, the assay presented here may be useful for detecting Entosphenus spp. in geographic range beyond [...]
Summary
The Pacific lamprey (Entosphenus tridentatus) is an anadromous fish once abundant
throughout coastal basins of western North America that has suffered dramatic declines in
the last century due primarily to human activities. Here, we describe the development of an
environmental DNA (eDNA) assay to detect Pacific lamprey in the Columbia River basin.
The eDNA assay successfully amplified tissue derived DNA of Pacific lamprey collected
from 12 locations throughout the Columbia River basin. The assay amplifies DNA from
other Entosphenus species found outside of the Columbia River basin, but is species-specific
within this basin. As a result, the assay presented here may be useful for detecting
Entosphenus spp. in geographic range beyond the Columbia River Basin. The assay did not
amplify tissue or synthetically derived DNA of 14 commonly sympatric non-target species,
including lampreys of the genus Lampetra, which are morphologically similar to Pacific lamprey
in the freshwater larval stage.
