We are interested in documenting hybridization and introgression in fishes and understanding the fate of hybrids (formation of hybrid swarms versus bimodal hybrid zones) and the processes that determine the extent of hybridization (historical factors, waterscapes, environmental features, life history features) and the structure of hybrid zones (roles of pre-mating and post-mating processes).

Dr. Armando Geraldes and I work together on understanding historical and contemporary hybridization in Dolly Varden and Arctic char using genomic approaches (principally genotyping-by-sequencing, GBS).

Matt Siegle completed a PhD (2017 )on the role of thermal history on tolerance to heat waves in an intertidal copepod (Tigriopus californicus).

Amy Liu (MSc) is conducting a genomic analysis of hybridization in o-existing lineages of Northern and Southern Dolly Varden.

Shuang Liu (PhD) is working on adaptive radiation in freshwater sculpins (Cottus spp.) and, in particular, divergence in ion regulation performance and mechanisms during colonization of fresh water.

Jon Mee (PhD, 2011) completed a PhD that investigated historical, physiological, and ecological factors that may explain the origin and persistence of asexual lineages within the genus Chrosomus. He is now a faculty member at Mount Royal University in Calgary. Click HERE.

Shannan May-McNally (MSc 2014) worked on hybridization between Arctic char (Salvelinus alpinus) and Dolly Varden (S. malma) that occur sympatrically in lake and stream systems in western Alaska (photo courtesy of Alaska fish and Game).

Jennifer Ruskey (MSc 2014) examined morphological and genetic structure of sympatric populations of Nooksack and longnose dace (Rhinichthys) to test whether or not the two dace represent distinct biological species.

Monica Yau completed an MSc (2013) that examined patterns of hybridization between native westslope cutthroat trout (Oncorhynchus clarkii lewisi) and introduced rainbow trout (O. mykiss) and if differences in tolerance to low water temperature influence the extent and geographic distribution of hybridization.

Past and open projects

We completed a study of growth rate of free-ranging hybrids of benthic and limnetic sticklebacks inferred from otoliths. Results suggested little detectable difference in growth rates (see Taylor et al. 2012, Evolution 66: 240-251 under "Publications") and we would like to next explore if this is dependent on age-specific differentiation in trophic morphology. Interested?



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