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 20 of 53 for “"foraging strategies"”.
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Spatial Ecology of Entomopathogenic Nematodes with Contrasting Foraging Strategies
Laboratory studies have identified a dichotomy in foraging behavior of entomopathogenic nematodes (EPNs) but little is known about their dispersal patterns in the field. Overall goal of this dissertation research was to examine the dispersal behavior of two EPN species with contrasting foraging …
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Sexually Dimorphic Foraging Strategies of a Salticid Spider (Phidippus Audax)
Made available in DSpace on 2014-12-14T16:11:10Z (GMT). No. of bitstreams: 1 7709000.pdf: 2554171 bytes, checksum: 9b299cbacfb854df11f911b1eedf0f8a (MD5) Previous issue date: 1976
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Drivers of variation in the migration and foraging strategies of pelagic seabirds
… among populations and the ontogeny of migration strategies. In this thesis, I utilise multi-species and longitudinal datasets from albatrosses and petrels, some of the most mobile species on Earth, to explore the drivers of variation in movements, habitat use and foraging behaviour, and the …
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Social, ecological, and developmental influences on fruit and invertebrate foraging strategies and gut microbial communities in white-faced capuchins (Cebus capucinus)
… variation in food resources by adjusting their foraging strategies. How primates respond to variation in invertebrate availability has rarely been the focus of studies of primate foraging ecology. This dissertation examines the role of insectivory in shaping foraging strategies, elucidates …
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Primate nutritional ecology: the role of food selection, energy intake, and nutrient balancing in Mexican black howler monkey (Alouatta pigra) foraging strategies
… support the idea that howler monkey feeding strategies enable them to translate energy into rapid growth rates and high reproductive output compared to other atelines. Finally, this research supports the increasing recognition of nutrient balancing as a dietary strategy used by nonhuman …
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Behavioral Flexibility and Foraging Strategies in Cassin's and Western Kingbirds (Tyrannus Vociferans and T. Verticalis) Breeding Sympatrically in Riparian Habitats in Central Arizona
Made available in DSpace on 2015-05-14T15:10:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7915355.PDF: 2810714 bytes, checksum: 2eba21307acf751e7f0cb284244d2b44 (MD5) Previous issue date: 1979
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Sensory and Neuromodulatory Entrainment of Foraging States in C. Elegans
<p>Foraging animals dynamically adjust their behavioral patterns over time to optimize feeding in their environment. In the nematode Caenorhabditis. elegans, foraging animals alternate between states of locomotory arousal. I observed that animals in low activity states remain nearby food patches, …
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The ethology of the Malayan false vampire bat (Megaderma spasma), with special emphasis on auditory cues used in foraging
… studies have revealed the use of two distinct foraging strategies by the echolocating Malayan false vampire bat, Megaderma spasma. When gleaning, bats retrieve prey located upon surfaces. Because both the prey and the surface reflect sound, bats may have difficulty distinguishing echo …
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Cichlids as a model for the evolution of visual sensitivity
… have evolved to exploit an astounding array of foraging strategies. The combination of phenotypic diversity and varied environmental conditions makes the cichlid system ideal for the examination of the relationship between ecology and the evolution of visual sensitivity. In this dissertation, I …
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Flamingo foraging plasticity: ecological drivers and impacts
… is the fact that predators display multiple foraging behaviours, thereby allowing them to overcome problems associated with unpredictability of food resources in space and time. The primary goal of this dissertation is to contribute to growing understanding of the ecological causes and …
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THE BROWN BEAR GUT MICROBIOME: A NOVEL TOOL FOR CONSERVATION & MANAGEMENT
… variation and GMB composition reflects diverse foraging strategies while allowing brown bears to achieve similar body condition outcomes. Monitoring brown bear GMBs could enable managers to quickly detect and assess the impact of environmental perturbations on brown bear health.</p>
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Flamingo foraging activity as a driver of spatial heterogeneity in Langebaan Lagoon, South Africa
… been paid to the possible impacts of different foraging methods used by flamingos on benthic communities. Multivariate and univariate analyses were carried out in order to determine the effects of two different flamingo feeding strategies (pit and channel foraging) on sediment penetrability and …
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The foraging ecology and conservation of the Great Black-backed Gull Larus marinus
… species and advancing our knowledge of their foraging ecology is therefore fundamental to assess the health of populations, identify research priorities, and guide conservation efforts. Within this thesis, I use a range of analytical and practical approaches to garner information about a …
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Simulating the evolution of recruitment behavior in foraging Ants
… is an important determinant of species' optimal foraging strategies, and of the dynamics of populations and communities. In order to explore the interaction of food heterogeneity and colony size in their effects on the behavior of foraging ant colonies, we built agent-based models of the foraging …
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Electrophysiology, agent-based modeling and inverse optimal control applications in neuroethology
… outcomes and optimal action selection emerge. In foraging, animals tend to make decisions that reconcile two core goals: energy maximization and time minimization. The predatory sea-slug Pleurobranchaea californica has a simple, accessible nervous system and exhibits a repertory of simple …
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Recovery of cached food by captive blue jays (Cyanocitta cristata)
… birds with noncaching birds and with a random foraging model. Blue Jays do return to their own caches with success rates higher than predicted by random searching and they also probe fewer sites than predicted by random. They also recover caches at success rates higher than non-caching birds …
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Differences in the Communicative Behavior and Neurobiology of Chimpanzees (Pan troglodytes) and Bonobos (Pan paniscus)
… that observed differences in the communicative strategies and neuroanatomy of the two Pan species were driven by differences in foraging strategies since they diverged from a common ancestor approximately one million years ago.</p>
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