Sökning: "vigilance"
Visar resultat 6 - 10 av 46 avhandlingar innehållade ordet vigilance.
6. Getting informed in a risky world : risk assessment, predator information & parental decisions
Sammanfattning : Predation ultimately affects the fitness of individuals. In nest building species like birds, the predation of dependent offspring is the most important source of reproductive failure, favouring the selection of parental adaptations to enhance offspring survival. LÄS MER
7. Attacking predators and fleeing prey : detection, escape and targeting behaviour in birds
Sammanfattning : The aim of this thesis is to further our understanding of predator and prey behaviour and decision making in different attack situations. The thesis deals with escape strategies, predator detection ability and prey targeting behaviour. LÄS MER
8. 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
9. Cross-functional brain imaging of attention, memory, and executive functions : Unity and diversity of neurocognitive component processes
Sammanfattning : The central theme of the present thesis revolves around the exploration of similarities and differences in brain activity patterns invoked by the component processes underlying mnemonic, executive and attentional functions. The primary aim was to identify and functionally characterize commonly recruited brain regions in terms of shared component processes, which has been a largely neglected area of research in cognitive neuroscience. LÄS MER
10. Risk assessment and contest behaviour in the Cichlid fish Nannacara anomala
Sammanfattning : The risk of predation is an important factor for our understanding of animal behaviour in general. This thesis investigates the influence of predation risk on fighting behaviour in the cichlid fish Nannacara anomala. LÄS MER