Home

Using morphological and microsatellite analysis to investigate postglacial diversity in an isolated population of threespine stickleback, Gasterosteus aculeatus, in Nueltin Lake, Manitoba.

Show simple item record

dc.contributor.supervisor Mooi, Randall D. (Biological Sciences) en_US
dc.contributor.author Schroeder, Bethany Sarah
dc.date.accessioned 2012-04-12T16:11:28Z
dc.date.available 2012-04-12T16:11:28Z
dc.date.issued 2012-04-12
dc.identifier.uri http://hdl.handle.net/1993/5302
dc.description.abstract Gasterosteus aculeatus (threespine stickleback) is a well-known model for behavioral and evolutionary studies. Rapid evolutionary radiations in postglacial timeframes have promoted distinct local populations with remarkable variation in biological characteristics. This study examines genetic and morphological variation among populations from the Thlewiaza watershed, specifically an isolated freshwater population in Nueltin Lake. Statistically significant genetic differences were observed using 11 microsatellite loci; FST values ranged from 0.29 (within watershed) to 0.48 (between watersheds) in comparison with the Nueltin Lake population. Gene flow between populations was likely inhibited due to isostatic rebound following the recent deglaciation of North America, 8.5 kya. In comparison with similar freshwater populations, the retention of defensive structures in G. aculeatus from Nueltin Lake was unexpected, and may reflect strong piscivorous predation pressures. Levels of differentiation, both genetic and morphological, observed in the Nueltin Lake population are highly significant, and should be recognised as a Designatable Unit (DU). en_US
dc.rights info:eu-repo/semantics/openAccess
dc.subject Gasterosteus aculeatus en_US
dc.subject Genetics en_US
dc.subject Morphology en_US
dc.subject Evolution en_US
dc.subject Manitoba en_US
dc.subject Nueltin Lake en_US
dc.title Using morphological and microsatellite analysis to investigate postglacial diversity in an isolated population of threespine stickleback, Gasterosteus aculeatus, in Nueltin Lake, Manitoba. en_US
dc.type info:eu-repo/semantics/masterThesis
dc.type master thesis en_US
dc.degree.discipline Biological Sciences en_US
dc.contributor.examiningcommittee Anderson, Gary (Biological Sciences) Docker, Margaret (Biological Sciences) Ford, Bruce (Biological Sciences) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note May 2012 en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

View Statistics