Genetic Comparison of Naturalized Rainbow Trout Populations among Lake Superior Tributaries: Differentiation Based on Allozyme Data

January 1, 1987 - Charles C. Krueger; Bernie May

Journal or Book Title: Transactions of the American Fisheries Society

Volume/Issue: 116

Page Number(s): 795-806

Year Published: 1987

Allelic frequencies at 27 polymorphic allozyme loci were compared among 15 collections of naturalized migratory rainbow trout Salmo gairdneri sampled from 10 stream drainages leading to Lake Superior. Multiple collections were made within the Brule River drainage in Wisconsin: one of spring-run spawning adults, one of fall-run adults, and four from Brule River tributaries. Significant allele frequency differences were observed among the 15 collections for 13 out of 21 loci examined (P < 0.05). Statistically significant differences occurred among rainbow trout from differentd rainagesa nd amongt he four site-specifics amplesf rom Brule River tributaries. No significant differences in allelic frequencies occurred between fall-run and spring-run adult fish. Genetic fixation values F•t indicated that about 2.6% of the total genetic variation occurred among the 10 drainages and that about 2.1% occurred among the six Brule River samples. Groups of collections identified by cluster analysis of genetic distances usually contained samples that were geographicallyp roximate, exceptw here the number of adult spawnersw as believed to be less than 50. The level of population differentiation reported here for Lake Superior was less than that previously reported for native rainbow trout populations from Pacific coastal drainages or that observed for introduced brown trout resident along the south shore of Lake Superior. The spatial units of focus for management of rainbow trout in Lake Superior should be groups of geographically proximate small streams, and possibly individual large drainage systems.

Type of Publication: Journal Article

Publisher: American Fisheries Society

Authors

You Might Also Be Interested In

Accessibility Questions:

For questions about accessibility and/or if you need additional accommodations for a specific document, please send an email to ANR Communications & Marketing at anrcommunications@anr.msu.edu.

Tag List
  • center for systems integration and sustainability
Michigan State University
  • Spartans Will.
  • © Michigan State University

MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential.

Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Quentin Tyler, Director, MSU Extension, East Lansing, MI 48824. This information is for educational purposes only. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.

The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707.

We comply with the Federal Trade Commission 1998 Children’s Online Privacy Protection Act (COPPA).