Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Kleptoparasitism"”.
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An empirical and theoretical investigation of kleptoparasitic foraging behaviour in mixed-species aggregations of gulls (Laridae)
This thesis investigated kleptoparasitism in mixed-species foraging aggregations of gulls (Laridae). Kleptoparasitism, or food stealing, is a strategy used frequently by gulls. Gull populations are increasing in urban areas despite declining overall. Understanding the role of kleptoparasitism in …
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Mutualism benefits and the evolution of an interspecific sentry call in associations between Sociable Weavers and Fork-tailed Drongos
… and aggression to steal food from other species (kleptoparasitism), and their most frequent host, the Sociable Weaver (Philetairus socius). While drongos apparently gain and weavers lose from this association, we investigated whether weavers derive foraging and predator protection benefits, and …
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Investigating the foraging ecology and energy requirements of a seabird population increasing in an intensely exploited marine environment
… by investigating the costs induced by kleptoparasitism between mixed colonies of greater crested terns and Hartlaub's gulls Chroicocephalus hartlaubii and colonies with greater crested terns alone. Video-recordings coupled with focal observations showed that terns suffer direct costs to …
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Are there self-imposed group foraging costs in the nutmeg mannikin (Lonchura punctulata)?
… different forms of competition and interference (kleptoparasitism, aggression). Recent work with starlings ( Sturnus vulgaris ) shows that social foragers may also experience self-imposed costs to their feeding rates in order to remain in the presence of group members, despite a lack of physical …
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The effect of individual variability and larger carnivores on the functional response of cheetahs
… and can eat quickly to minimize the risk of kleptoparasitism. My results show how the pressures of cub rearing and coexisting with larger carnivores differentially shape the hunting behavior of cheetahs, and suggest that intensity of mesopredator suppression may depend on individual …
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Evolutionary models in structured populations
… survival. A basic game-theoretical model of kleptoparasitism in an infinite homogeneous well-mixed population is extended to structured populations represented by different graphs. The features of the population structure that might favour the appearance of kleptoparasitic behaviour among …
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Ecological Interactions Between Spiders and the Purple Pitcher Plant, <i>Sarracenia purpurea</i>
<p>Spiders and harvestmen are commonly captured by or reside upon the carnivorous purple pitcher plant, <em>Sarracenia purpurea</em>. Although spiders and harvestmen are often known to be prey of <em>S. purpurea</em>, other ecological interactions between these arthropods and the plant are poorly …