loading page

“Life histories” is a more appropriate term than “ecotypes” to describe ocean- and stream-maturing Pacific lamprey Entosphenus tridentatus
  • Benjamin Clemens,
  • Carl Schreck
Benjamin Clemens
Oregon Department of Fish and Wildlife, Oregon State University
Author Profile
Carl Schreck
US Geological Survey, Oregon Cooperative Fish and Wildlife Research Unit, USGS
Author Profile


The scientific literature includes a plethora of terms to denote within-species phenotypic diversity (e.g., morphotypes; ecotypes; ecomorphotypes; ecophenotypes; polymorphisms; and life histories). Here we discuss a particular situation in which different terms (ecotypes and life histories) have been used to describe the same within-species diversity of adult Pacific lamprey Entosphenus tridentatus, note an important challenge in using “ecotypes”, and conclude with a recommendation to use “life histories” to describe the ocean- and stream-maturing forms of Pacific lamprey.

Peer review status:UNDER REVIEW

25 Aug 2020Submitted to Ecology and Evolution
27 Aug 2020Assigned to Editor
27 Aug 2020Submission Checks Completed
02 Sep 2020Reviewer(s) Assigned
18 Sep 2020Review(s) Completed, Editorial Evaluation Pending