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DEVELOPMENT OF STABLE ISOTOPE MARKING TECHNIQUES FOR EARLY LIFE STAGES OF LAKE STURGEON

Lake sturgeon were historically abundant in the Great Lakes, but are   currently listed as endangered, threatened, or as a species of   conservation concern by multiple agencies.  Rehabilitation plans   have been developed for Great Lakes lake sturgeon; stocking is a   significant component of these plans.  Assessments of habitat use   and dispersal for early life stages, evaluation of the most suitable   life stages for stocking and methods for differentiating stocked   from wild fish have been identified as important research needs to   support lake sturgeon rehabilitation.  Tracking fish dispersal and   evaluating stocking success require appropriate tagging methods, but   previously applied tags are limited in their applicability to early   life stages or do not provide the possibility for multiple   differentiating marks.  The goals of this project are to   develop a technique for marking age-  lake sturgeon pectoral fin   rays with stable strontium isotopes (86Sr/88Sr) and to evaluate   retention of stable isotopic marks.  The ability to impart multiple   differentiating batch marks to lake sturgeon fry that can be   recovered non-lethally will facilitate future assessments of   stocking success and stocked fish dispersal and habitat use.

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Laboratory Investigation
Scale of Phenomena
Organism
Resource Management
Fisheries
Annex Numbers
Surveillance and Monitoring

The Great Lakes - St. Lawrence Research Inventory is an
interactive, Internet-based, searchable database created as a tool to collect and disseminate
up-to-date information about research projects in the
Great Lakes - St. Lawrence Region.