Search for dissertations about: "predators"
Showing result 11 - 15 of 179 swedish dissertations containing the word predators.
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11. The prey perspective - behaviour and appearance in a world of predators
Abstract : The varieties of prey phenotypes that have been revealed in nature are vast and many of these phenotypes are the result of the selective force that predators have had on prey traits in the past. Even within species and populations we see variations due to both differences in the selection forces they live under but also due to individual trait variation. READ MORE
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12. Biological control of diamondback moth : the roles of predators, parasitoids and insecticides
Abstract : The diamondback moth Plutella xylostella L. (Lepidoptera: Plutellidae) is a serious pest of economically important crucifer crops such as cabbage. The moth has developed resistance to all tested insecticides and further studies on the potential role of factors affecting P. xylostella survival, including natural enemies, are urgently needed. READ MORE
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13. Predators in low arctic tundra and their impact on community structure and dynamics
Abstract : The abundance of predators and their impact on ecosystem dynamics is a vividly discussed topic in current ecology. In my studies, incorporating field observations, field experiments and theoretical modeling, I explored the importance of predators and predation in a low arctic tundra ecosystem in northern Norway. READ MORE
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14. Odours attracting Medetera (Diptera) predators to spruce bark beetles in a multitrophic system
Abstract : Tree-killing bark beetles cause great economic and ecological damage worldwide. Several long-legged fly species of the genus Medetera are natural enemies of tree-killing bark beetles and are of interest as potential biological control agents. READ MORE
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15. Beachcombers, landclubbers and able seemen : effects of marine subsidies on the roles of arthropod predators in coastal food webs
Abstract : .... READ MORE