Blar i forfatter "Häkli, Katja"
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Allochrony as a potential driver for reproductive isolation in adaptive radiations of European whitefish ecomorphs
Bitz-Thorsen, Julie; Häkli, Katja; Bhat, Shripathi; Præbel, Kim (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-29)In northern Fennoscandian lakes, monophylogenetic lineages of postglacial fishes are radiating into several adaptive forms, but the speciation process is still at an incipient stage. The speciation process has received increased attention over the years, but the underlying mechanisms and drivers are still debated and poorly understood. European whitefish (<i>Coregonus lavaretus</i> [L.]) is the most ... -
Diversifying selection drives parallel evolution of gill raker number and body size along the speciation continuum of European whitefish
Häkli, Katja; Østbye, Kjartan; Kahilainen, Kimmo Kalevi; Amundsen, Per-Arne; Præbel, Kim (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-05)Adaptive radiation is the evolution of ecological and phenotypical diversity. It arises via ecological opportunity that promotes the exploration of underutilized or novel niches mediating specialization and reproductive isolation. The assumed precondition for rapid local adaptation is diversifying natural selection, but random genetic drift could also be a major driver of this process. We used 27 ... -
The speciation landscape of European whitefish in Northern Fennoscandia – the importance of deglaciation history, standing genetic variation and natural selection
Häkli, Katja (Doctoral thesis; Doktorgradsavhandling, 2019-12-10)<p>During the last deglaciation, one clade of European whitefish (<i>Coregonus lavaretus</i> L.) colonized the lakes in the three contemporary watercourses of northern Fennoscandia (Pasvik, Tana and Alta) and diverged thereafter in sympatry. This thesis investigates the interplay between evolutionary processes and standing genetic variation in shaping phenotypic and genetic divergence, and how ...