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Article

The influence of sexual size dimorphism on the dietary shifts of Capercaillie Tetrao urogallus during spring

M. Odden, Auteur ; P. Wegge, Auteur ; S. Eliassen, Auteur ; M. H. Finne, Auteur

Dans Ornis Fennica (80(3) 2003)

In boreal forests during spring, the highly size-dimorphic Capercaillie Tetrao urogallus changes its diet from pine needles to more nutritious ground forage. At Varaldskogen in southeast Norway, we compared the dietary shift of males and females[...]

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Article

Multiple predators in the pelagic: modelling behavioural cascades

O. Fiksen, Auteur ; S. Eliassen, Auteur ; J. Titelman, Auteur

Dans Journal of Animal Ecology (74(3) MAY 2005)

1. The behaviour of predators is rarely considered in models of predator-prey interactions, nor is it common to include multiple predators in models of animal behaviour. 2. We introduce a model of optimal diel vertical migration in zooplankton p[...]

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Article

Social interactions among Capercaillie Tetrao urogallus males outside the lek during spring

P. Wegge, Auteur ; S. Eliassen, Auteur ; M. H. Finne, Auteur ; M. Odden, Auteur

Dans Ornis Fennica (82(4) 2005)

Capercaillies have a lek-like mating system, with partly overlapping male daytime ranges extending radially out from smaller display territories at the lek. With VHF telemetry, we studied the spatial interactions among neighbouring adult males ([...]

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