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 14 of 14 for “"Predator-prey model"”.
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Scavenger-Predator-Prey Model with Finite Resources
… works, each delving into the dynamics of predator-prey-scavenger interactions. The first segment of the thesis investigates the role of predator-taxis in pattern formation within predator-prey systems, as documented in the paper ”Generalized Holling III Functional Response: role of …
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A Comparison of Deterministic and Stochastic Population Models
… the author considers the exponential and the predator-prey population models. A comparison of the deterministic and stochastic versions of each is made. The author shows that on average a stochastic model is precisely its corresponding deterministic model. The first model considered is the …
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Model Reference Adaptive Backstepping Control of an Autonomous Ground Vehicle
… In this thesis, the behavior of a bio-inspired predator prey model is considered to stimulate a more organic response to obstacles and a moving target than existing algorithms. However, the current predator prey model has a disconnect between the desired velocities commanded and the torque …
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Effects of fractional time derivatives in predator-prey models
… with the effects of fractional derivatives in predator-prey like systems, including models of plant water interaction. In Chapter 3, a fractional order predator-prey model is introduced, and we show how fractional derivative order can change the system from monostable to bistable. The …
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Sir epidemic and predator - prey models of fractional-order
Recently, many deterministic mathematical models such as ordinary differential equations have been extended to fractional models, which are transformed using fractional differential equations. It was believed that these fractional models are more realistic to represent the daily life phenomena. The …
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Particles methods for kinetic equations in plasma physics, collective behaviors and optimization.
… 3 we will formulate a follower-leader kinetic model to simulate the collective motion of birds. We will show how it is possible to improve the efficiency of classical stochastic algorithms in presence of non locality. In Chapter 4 we will consider a similar setting in the context of …
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Relaxation and Spontaneous Ordering in Systems with Competition
… two studies: 1) The response of a multi-species predator-prey system to perturbation. 2) The features of a rich attractor space in a system of repulsively coupled Kuramoto oscillators. In the first part, we address this question: how does a complex coarsening system with non-trivial in-domain …
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Stochastic effects on extinction and pattern formation in the three-species cyclic May–Leonard model
… the fluctuation effects in the seminal cyclic predator-prey model in population dynamics due to Robert May and Warren Leonard both in the zero-dimensional and two-dimensional spatial version. We compute the mean time to extinction of a stable set of coexisting populations driven by large …
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Spatial-temporal patterns in evolutionary ecology and fluid turbulence
… where the ecosystem is composed of a predator and its prey. However, a sub-population of mutant prey arises from strong environmental pressure, and the trade-off between selection from reproduction and predation is manifested in the patterns of eco-evolutionary dynamics. We discuss how …
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Stochastic modelling of nutrient and predator-prey populations
… a stochastic differential equation (SDE) model of a fjord nutrient, based on the hydrographic and chemical data collected from the 1991 field campaign implemented in Loch Linnhe. Stochastic modelling approach is able to account for the process noise in the nutrient data. The SDE model is …
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Population dynamics of stochastic lattice Lotka-Volterra models
In a stochastic Lotka-Volterra model on a two-dimensional square lattice with periodic boundary conditions and subject to occupation restrictions, there exists an extinction threshold for the predator population that separates a stable active two-species coexistence phase from an inactive state …
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Predator-prey dynamics under the influence of exogenous and endogenous regulation : a data-based modeling study on spring plankton with respect to climate change
Understanding the interactions of predators and their prey and their responses to environmental changes is one of the striking features of ecological research. In this thesis, spring dynamics of phytoplankton and its consumers, zooplankton, were considered in dependence on the environmental …
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Aspects of population dynamics
… dynamical behavior. Ecological systems can be modeled through relatively simple population dynamics models. There is a plethora of models describing deterministic models of ecological systems evolving in a constant environment. However, stochasticity can lead to extinction or fixation events, …
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Epistasis in Predator-Prey Relationships
… or more genes to control a single phenotype. We model epistasis of the prey in a two-locus two-allele problem in a basic predator- prey relationship. The resulting model allows us to examine both population sizes as well as genotypic and phenotypic frequencies. In the context of several numerical …