2. Coasters in the news

3. Distribution of coaster brook trout

4. Lake Superior Canada United States

6. What Are Coaster Brook Trout? Life history variant? part of natal river population part of natal river population straying between rivers straying between rivers long range movement between populations long range movement between populations Unique stock? Evolutionary Significant Unit Evolutionary Significant Unit

7. Methods

8. Resolving the genetic identify of coasters microsatellite DNA microsatellite DNA high resolution high resolution identify individuals and populations identify individuals and populations

9. Single populations?

10. JP CY LC SW DB PL HC 0.01 Genetic distances among sampled populations

11. Cypress R. Jackpine R. Pearl R. Little Cypress R. Dublin Cr. Relatedness of Individual River Resident Brook Trout

12. coasterhatchery Relatedness of Individual Brook Trout

14. Results coaster brook trout  genetically distinct strain coaster brook trout  genetically distinct strain coasters produced by river populations (life history variant) coasters produced by river populations (life history variant) vectors of gene flow between rivers vectors of gene flow between rivers

15. Unanswered Questions how do we bring them back? how do we bring them back? what makes a coaster? (habitat / life history)what makes a coaster? (habitat / life history) optimal vs. potential habitat optimal vs. potential habitat competition with exotics? competition with exotics? genetic structure of coasters throughout Lake Superior genetic structure of coasters throughout Lake Superior

16. Implications coasters come from river populations coasters come from river populations interdependence of lake and river populations interdependence of lake and river populations making a “coaster brood stock” won’t guarantee success making a “coaster brood stock” won’t guarantee success management of source rivers is necessary for recovery management of source rivers is necessary for recovery