Overview of research projects
Salmonids are important in icelandic freshwater ecosystems, and have been studied extensively for decades. Particular focus has been on diversity in Arctic charr (Salvelinus alpinus) and Brown trout (Salmo trutta), with emphasis on ecological and evolutionary questions. Researchers at the University of Iceland, under the supervision of Sigurdur S. Snorrason have focused a great deal on the Arctic charr in Lake Thingvallavatn, but in collaboration with colleagues at Holar University, the Marine and Freshwater Institute and other researchers also on other locales, populations of brown trout and other salmonids.
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Pictured are large benthic charr in Ólafsdráttur. They gather in the shallows, where the cold water from underground streams generates ideal conditions for spawning. Link to something cool here.
Several projects using population genomics have addressed questions about subdivision of charr and trout populations.
External head morphology differs quite dramatically between charr populations and in some cases between morphs in the same lake. Guðbjörg Ósk Jónsdóttir, in collaboration with Finnur Ingimarsson, Sarah E. Steele and Kenedy A. Williams has studied this.
Geolocator technology has made it possible to track the spatial – temporal usage of individuals and morphs of lake habitat. Lieke Ponsioen explores this in her Ph.D. project, supervised by Kalina Kapralova and Ben Hennig
Sympatric morphs are an interesting system to study the evolution of reproductive barriers. QHL studied the barriers between the smaller two morphs of Arctic charr in Lake Þingvallavatn.
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