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 28 for “"Optimal Foraging"”.
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Time-Memory Behavior Yields Energetically Optimal Foraging Strategy in Honey Bees.
… high (0.4-0.9). Agent-based simulation of foraging behavior indicated these high levels of persistence represent an energetically optimal strategy, which is likely a compromise solution to an ever-changing environment. Time-memory, with its accompanying anticipation, enables foragers to …
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Spectrum decision making in distributed cognitive radio networks using an optimal foraging approach
… is important specifically for the realisation of optimal spectrum utilisation in a distributed CR network (CRN). Dynamic spectrum reconfiguration has previously been reported to improve the spectrum utilisation in CRNs. In exploiting spectrum reconfiguration of frequency and channel bandwidth to …
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The effects of structured variation in nectar standing crop on currency choice and optimal foraging by bumble bees
… structured resource variation and how it impacts foraging animals are unclear. A survey of nectar abundance in five plant species revealed the spectrum from only within- to solely among-plant variation. Captive bumble bees (Bombus impatiens) confronted with an increasing component of …
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Examining financial puzzles from an evolutionary perspective
… hypothesis, applications from risk-sensitive optimal foraging theory, and the cheater detection hypothesis. Next we introduce some of the most-researched puzzles in the finance literature. Examples include overreaction, loss aversion, and the equity premium puzzle. Following this, we discuss …
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Simulating the evolution of recruitment behavior in foraging Ants
… of food 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 …
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Fine-Scale Foraging Behavior of Humpback Whales Megaptera novaeangliae in the Near-Shore Waters of the Western Antarctic Peninsula
… tools were used to examine the fine-scale foraging behaviors of humpback whales (Megaptera novaeangliae) in the coastal waters of the Western Antarctic Peninsula during the austral autumn of 2009 and 2010. Discrete feeding events (i.e., lunges) were inferred from the biologging records of …
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Linking foraging behaviour of post-breeding adult female elephant seals from Marion Island to physical dynamics and productivity at the South-West Indian Ridge
… data loggers (CTD-SRDL's) and their foraging behaviour was examined in relation to different chlorophyII-a concentrations. Optimal foraging and area restricted search theories predict that travelling speed and turning frequency would be quantifiably affected by prey density, which is …
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Oystercatchers and cockles : a predatory-prey study
… cockles increased with their size. According to optimal foraging theory, these larger ones should therefore have been preferred, and this proved to be so. The rate at which oystercatchers ate cockles followed a type II functional response. The plateau was not caused solely by handling time, nor …
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Optimally Navigating a Piecewise-deterministic World
We consider various problems arising in optimal control of piecewise-deterministic Markov processes (PDMPs), with an emphasis on path planning problems where a randomly switching mode impacts the dynamics and optimization objective. We introduce two application-driven modeling frameworks, each …
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The Cost of Capturing Prey: Measuring Largemouth Bass Foraging Activity Using Glycolytic Enzymes (Lactate Dehydrogenase)
<p>Optimal foraging theory predicts that predators choose prey based on size, morphology, and behavior that maximizes the net energy gained per time spent foraging. For prey choice to be optimal, the ratio of energy gained to energy expended should be maximized. Activity costs associated with …
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A RATE COMPARISON MODEL OF CONCURRENT SCHEDULE PERFORMANCE
… model of concurrent schedule performance and foraging is proposed. The model is a molecular equalizing theory of matching, based on results from optimal foraging theory and corresponding data from behavioral ecology. It state that animals leave one concurrent alternative for another whenever …
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The role of stochastic resonance and physical constraints in the evolution of foraging strategy
… study of the optimization of this process: foraging within a single, finite food patch for a limited amount of time. The work is an example of the computational algorithms of statistical physics being applied to the ecological field of foraging behavior. The analysis begins with an …
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The effects of individual-level differences in metabolic rate on foraging behavior and life history traits in honeybees
… rate and life history is primarily mediated via foraging, which shapes the energy acquisition patterns of an individual. This predicts that individuals with different metabolic rates likely vary in their foraging strategies, although such links have rarely been empirically investigated in the …
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Investigations of the Trophic Relationships, Feeding Ecology and Feeding Behavior of Larval Spot, <i>Leiostomus Xanthurus</i> Lacepede, and Atlantic Croaker, <i>Micropogonias Undulatus</i> (Linnaeus) (Pisces:Sciaenidae)
… were in accordance with predictions made by optimal foraging theory and two other food selection models.</p> <p>The feeding incidence of three age classes of Leiostomus xanthurus, on the rotifer Brachionus plicatilis, was investigated under six different spectral regimes (red, yellow, green, …
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Pollination ecology of the simultaneously flowering Impatiens capensis and I. pallida
… contradicts certain models proposed for foraging behavior in simultaneously flowering species and those dealing with optimal foraging. Such foraging behavior could have potentially devastating effects on the nonpreferred species, especially if the plant is an annual. Both Impatiens …
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The importance of predator behaviour on risk to prey
… own perceived risk of predation. This shows that optimal foraging decisions under the threat of predation, as well as perceptual constraints, can mediate the effect of predator behaviour on prey risk.
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Zooming in on human-wildlife coexistence: primate community responses in a shared agroforest landscape in Guinea-Bissau
… avoidance was temporally overruled in favour of optimal foraging. Interview data with local people corroborated biological data and provided additional information on chimpanzee behaviour within villages. Based on local narratives, when foraging at the villages chimpanzees used different social …
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Temporal dynamics of choice behaviour: an examination of pre- and post-choice latencies in rats and humans
… to investigate how closely rats approximated optimal foraging. We found that rats approximated the optimal strategy across the two environments that differed in the average probability of reward as well as the dynamics of the depletion-renewal cycle. In Chapter 3, we presented rats with reward …
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How animal movement defines behaviour: new insights into the ecology of seabirds at sea
… from seabirds to explore the mechanisms behind foraging and how these are underpinned by the movement of individual animals. In chapter 1, I provide an introductory overview of the literature and introduce my study species. In chapter 2, I examine the methods available to interpreting behaviour …
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