Search for dissertations about: "Visual ecology"
Showing result 6 - 10 of 41 swedish dissertations containing the words Visual ecology.
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6. Evolutionary Ecology of Floral Traits in Fragrant Orchids
Abstract : Why are flowers so diverse? Much of floral evolution is thought to be driven by pollinator-mediated selection. However, the connection between macroevolutionary patterns of floral diversity and microevolutionary processes remains poorly understood. In this thesis, I have used the fragrant orchids Gymnadenia conopsea s.s. READ MORE
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7. Mechanistic aspects of host plant preference in butterflies
Abstract : Searching and locating resources is essential for survival. In herbivorous insects search behavior is conducted on several scales, requiring input and integration of information from different sensory modalities. READ MORE
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8. Causes and consequences of niche differentiation between color morphs of pygmy grasshoppers
Abstract : In this thesis, I used the color polymorphic pygmy grasshopper, Tetrix subulata, as a model system in order to investigate the degree of niche differentiation between alternative color morphs that are present within a single population. First, I hypothesized that individuals belonging to different color morphs differ in their innate food preference due to somewhat dissimilar physiology, and in their actual food consumption due in part to differential habitat use. READ MORE
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9. Trophic interactions and behaviour : Studies relevant to a Baltic Sea biomanipulation
Abstract : The main theme of this thesis is the interactions of animals with the environment and each other. The thesis was written within the framework of a biomanipulation project “Pikeperch in Himmerfjärden”. READ MORE
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10. Living in a predation matrix : Studies on fish and their prey in a Baltic Sea coastal area
Abstract : This thesis was written within the framework of a biomanipulation project where young-of-the-year (YOY) pikeperch (Sander lucioperca) were stocked to a Baltic Sea bay to improve water quality through a top-down trophic cascade. The aim of my doctorial studies was however focused on a broader ecological question, namely predation (the main driving force in a biomanipulation). READ MORE