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Parallel and non-parallel morphological divergence among foraging specialists in European whitefish (Coregonus lavaretus)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
Parallel phenotypic evolution occurs when independent populations evolve similar traits in response to similar selective regimes. However, populations inhabiting similar environments also frequently show some phenotypic differences
that result from non-parallel evolution. In this study, we quantified the relative importance of parallel evolution to similar foraging regimes and nonparallel lake-specific ...
Ecological speciation in postglacial European whitefish: rapid adaptive radiations into the littoral, pelagic, and profundal lake habitats
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
Understanding how a monophyletic lineage of a species diverges into several adaptive forms has received increased attention in recent years, but the underlying mechanisms in this process are still under debate. Postglacial fishes are
excellent model organisms for exploring this process, especially the initial stages of ecological speciation, as postglacial lakes represent replicated discrete ...
Contrasting Population and Life History Responses of a Young Morph-Pair of European Whitefish to the Invasion of a Specialised Coregonid Competitor, Vendace
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
Invasions of non-native species represent a global problem of great scientific interest. Here we study in detail the response in population and life history characteristics of closely related native species, with divergent habitat preferences, that are impacted by an invading species over a sufficient time period to allow a new stable state to become established. A time series of 20 years starting ...
Diversity and abundance of water birds in a subarctic lake during three decades
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
The numbers of divers, ducks, gulls, terns and waders in the 15 km2 oligotrophic lake Takvatn, North
Norway, were estimated six times during 1983-2012. Systematic mapping surveys were done by boat
within the first week after the ice-break in June. Twenty-one species were observed over the years and
12 were regarded as breeding on the lake. Red-breasted merganser Mergus serrator was the dominant
diving ...