Avancerad sökning
Hittade 2 avhandlingar som matchar ovanstående sökkriterier.
1. Cycles of voles, predators, and alternative prey in boreal Sweden
Sammanfattning : Bank voles, grey-sided voles, and field voles had synchronous 3-4 year density cycles with variable amplitudes which averaged about 200-fold in each species. Cycles of vole predators (red fox and Tengmalm's owl), and their (foxes') alternative prey (mountain hare and forest grouse) lagged behind the vole cycles. LÄS MER
2. Reproductive behaviour in tetraonidae with special reference to males
Sammanfattning : .... LÄS MER
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