Evaluate Habitat Use and Population Dynamics of Lampreys in Cedar Creek
Citation
Stone, Jennifer, Jodi Pirtle, Scott Barndt, ''Evaluate Habitat Use and Population
Dynamics of Lampreys in Cedar Creek'', Project No. 2000-01400, 44 electronic pages,
(BPA Report DOE/BP-00004672-1)
Summary
Abstract Pacific lamprey (Lampetra tridentata) in the Columbia River Basin have declined to a remnant of their pre-1940s populations and the status of the western brook lamprey (L. richardsoni) is unknown. Identifying the biological and ecological factors limiting lamprey populations is critical to their recovery, but little research has been conducted on these species within the Columbia River Basin. This ongoing, multi-year study examines lamprey populations in Cedar Creek, Washington, a third-order tributary to the Lewis River. This annual report describes the activities and results of the second year of this project. Adult (n = 24), metamorphosed (n = 247), transforming (n =4), and ammocoete (n = 387) stages from both species were [...]
Summary
Abstract
Pacific lamprey (Lampetra tridentata) in the Columbia River Basin have
declined to a remnant of their pre-1940s populations and the status of the
western brook lamprey (L. richardsoni) is unknown. Identifying the biological and
ecological factors limiting lamprey populations is critical to their recovery, but little
research has been conducted on these species within the Columbia River Basin.
This ongoing, multi-year study examines lamprey populations in Cedar Creek,
Washington, a third-order tributary to the Lewis River. This annual report
describes the activities and results of the second year of this project. Adult (n =
24), metamorphosed (n = 247), transforming (n =4), and ammocoete (n = 387)
stages from both species were examined in 2001. Lamprey were captured using
adult fish ladders, lamprey pots, rotary screw traps, and lamprey electrofishers.
Twenty-nine spawning ground surveys were conducted. Nine strategic pointspecific
habitat surveys were performed to assess habitat requirements of
juvenile lamprey.
