Publications by authors named "Jostein Skurdal"
Article Synopsis
- A study used a mixed model to analyze how climate affects the timing of spawning migrations for two newt species, T. cristatus and L. vulgaris, in southern Norway, showing that amphibians are significantly influenced by environmental conditions like temperature and rainfall.
- Migration for L. vulgaris occurs at lower temperatures than for T. cristatus, but requires higher rainfall, suggesting that climate impacts their migratory behaviors differently.
- While warmer climates may benefit northern populations by improving juvenile survival, shifts in migration timing due to climate change could have mixed effects, highlighting the need for increased conservation efforts for newts.
Cannibalism in whitefish (Coregonus lavaretus) is studied on the basis of an evolutionary model. The model predicts that individuals may be cannibalistic if they gain sufficiently in terms of fitness relative to the reduction in survival caused by this behaviour. If cannibalistic forms mainly increase survival it is predicted that cannibalism is particularly likely to be an evolutionarily optimal strategy if only a few age classes are being cannibalized and if, simultaneously, many age classes are cannibalistic.
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