Sökning: "anti-predator behaviour"
Visar resultat 1 - 5 av 13 avhandlingar innehållade orden anti-predator behaviour.
1. Early life stages of brown trout - Anti-predator responses under warming winters
Sammanfattning : During winter, juvenile salmonids in boreal streams are vulnerable to predation, mainly from mammals and birds. Encounters with terrestrial predators can be reduced or avoided if fish limit activity to the darker periods of the day or to periods with surface ice. LÄS MER
2. From behaviour to genes: anti-predator responses of brown trout (Salmo trutta) under winter conditions
Sammanfattning : Temperature has major effects on the performance of poikilotherms. In encounters with predators, low winter temperatures constrain predator detection and escape capabilities in prey fishes. LÄS MER
3. Individual variation in behaviour: personality and performance of brown trout in the wild
Sammanfattning : Individuals from the same population often show very different behaviour. These differences, when consistent across time, are referred to as animal personality or behavioural syndromes. Explaining the occurrence of animal personality from an evolutionary perspective has however proven a difficult issue to tackle. LÄS MER
4. Causes and consequences of individual variation in anti-predator traits
Sammanfattning : Predation imposes a potent evolutionary force on prey, moulding the evolution of traits and diversification of species, and can furthermore have powerful ecological consequences. We know that different species vary in how they cope with their natural enemies, and, consequently, a huge range of anti-predator defences are displayed in nature. LÄS MER
5. Predator effects on behaviour and life-history of prey
Sammanfattning : In this thesis I investigate predator-induced effects on behavioural and life-history characteristics of prey. At any moment a given predator is capable of attacking a small number of prey. LÄS MER