Per-Arne Amundsen

TL;DR: Various aspects of phenotypic and life-history variation of Atlantic salmon Salmo salar L., brown trout Salmo trutta L., and Arctic charr Salvelinus alpinus are reviewed.

TL;DR: A modification of the graphical Costello method is proposed for the analysis of stomach contents data that may be particularly well-suited for the examination of predictions made from optimal foraging, competition and niche theories.

TL;DR: Hg was the only metal where these species differences were possibly related to biomagnification, and the concentrations generally appeared to be inversely related to the trophic level of the fish species.

TL;DR: In this paper, the authors studied nine Norwegian lakes in three watercourses, which each harboured pairs of divergent whitefish morphs and compared the morphology and life history of these morphs, documented the extent of genetic differentiation between them and contrasted the niche use of sympatric morphs along both the habitat and resource axes.

TL;DR: It is shown, for predators feeding on prey that exhibit food-dependent growth, that culling of fish prey may promote predator recovery and represents an experimental demonstration of an alternative stable state in a large-scale field system.