Item – Theses Canada

​
OCLC number
440084862
Link(s) to full text
LAC copy
LAC copy
Author
Halbisen, Michael A.,1974-
Title
Historic and anthropogenic influences on the genetic variation of lake trout, Salvelinus namaycush, populations in the Great Lakes region.
Degree
Ph. D. -- Trent University, 2008
Publisher
Ottawa : Library and Archives Canada = Bibliothèque et Archives Canada, [2009]
Description
4 microfiches
Notes
Includes bibliographical references.
Abstract
The practice of supplementing wild populations with captive-raised individuals is often intended to rebuild reduced populations, but has many unintended negative outcomes, including the loss of native genetic variation that may be essential for long-term survival. The lake trout ('Salvelinus namaycush') populations of the Great Lakes region have been stocked with hatchery strains since the mid-1800s, and provided an ideal system for studying the influence of supplemental stocking on natural genetic variation. Parallel mitochondrial (PCR-RFLP) and microsatellite (11-12 loci) DNA analyses were used to measure the genetic attributes of study populations, and evaluate the genetic impact from stocking. Overall, supplemental stocking had a variable influence on genetic variation relative to influences from postglacial processes and modern-day landscape attributes. Together, the results obtained by these studies provide essential information for refining genetics-based lake trout conservation strategies, and they build a solid foundation for future analyses of adaptive characteristics among populations.
ISBN
9780494432068
0494432063