Population Genetics of Lamprey in California
Continuing the genetic investigation of understudied lamprey in California
Baby lamprey being measured
Project Summary
Lampreys, a group of jawless, eel-like fishes, are extant representatives of the first known vertebrates. Survival to modern times depended on lampreys’ parasitic strategy; however, multiple non-parasitic species have evolved. One current complication to lamprey population genetic research is the difficulty in determining an accurate species identification based on morphological features at the larval and juvenile life stages. At least six species of lamprey (Entosphenus spp. and Lampetra spp.) occur in California watersheds, and multiple species’ ranges overlap. All are listed as California Species of Special Concern; yet, little is known about the interspecific and intraspecific genetic structure of lamprey populations throughout the state.
In our pilot study, we applied restriction-site associated DNA sequencing (RADseq) to lamprey samples (N=480) collected opportunistically through several ongoing salmon surveys. Our dataset captures individuals from various species, life stages, and geographic locations. This study (in progress) aims to capture a snapshot of the genetic composition and relationships of California’s central valley lamprey at both the species and population level. Future work includes the development of SNP markers to distinguish between all lamprey species in California. This will improve our ability to assess population structure and estimate genetic differentiation among parasitic and non-parasitic lampreys.
Project Team
Grace M. Auringer, Department of Animal Science, University of California, Davis, One Shields Ave, Davis, CA, USA
Pascale Goertler, Delta Stewardship Council - Delta Science Program, 980 Ninth Street, Suite 1500, Sacramento, CA, USA
Amanda J. Finger, Department of Animal Science, University of California, Davis, One Shields Ave, Davis, CA, USA
Sample collection for this project is made possible by the following collaborators:
CDFW: Fresno - Ken Johnson
CDFW: North Central Region (Region 2) - Jason Julienne
CDFW - Dave Contreras
CDFW - Michael Dege
DWR - Chris Cook
DWR - Elizabeth Wells
EBMUD - Ed Rible
FISHBIO - Jason Guignard
Napa County RCD - Jonathan Koehler
Normandeau Associates - Tim Salamunovich
PSMFC Rotary Screw Trap - Kassie Hickey
SFPUC: Natural Resources and Lands Management Division - Brian Sak