Sökning: "visual foraging"
Visar resultat 1 - 5 av 12 avhandlingar innehållade orden visual foraging.
1. Fish foraging under visual constraints
Sammanfattning : Visual conditions are changing in several different ways. Some lakes are getting turbid due to eutrophication or erosion while others are getting browner due to brownification. These two types of visual degradation results in completely different optical properties of lakes. LÄS MER
2. Odour-mediated nectar foraging in the silver Y moth, Autographa gamma
Sammanfattning : It is well established that floral odours play a significant role in the nectar foraging behaviour in Lepidoptera and other insect orders. Floral odour may elicit searching, alighting and feeding behaviours alone or in concert with visual stimuli. LÄS MER
3. Bird Vision: Spatial acuity and colour discrimination in bright and dim light
Sammanfattning : Birds use vision to guide navigation, foraging and mate choice, and studies of the limitations in bird visual perception are most helpful for the understanding of bird ecology. Here, I present four studies of bird vision in bright and dim light. LÄS MER
4. Contours of Cognition
Sammanfattning : This thesis concerns the nature of cognition. It posits that cognitive processes primarily are means to maintain allostasis in organisms whose ecological niches require movement to approach food-resources and avoid predation. LÄS MER
5. Spatial Vision in Birds: Anatomical investigation of spatial resolving power
Sammanfattning : Avian eyes are big both in relative and absolute terms, thus the importance of vision to birds is obvious. Even though the general eye plan is rather conservative throughout the group, there is a great variation in visual capabilities. LÄS MER