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1

Bolohan, Noah. "Seasonal Variation in a Predator-Predator-Prey Model." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40899.

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Seasonal shifts in predation habits, from a generalist in the summer to a specialist in the winter, have been documented for the great horned owl (Bulbo virginialis) in the boreal forest. This shift occurs largely due to varying prey availability. There is little study of this switching behaviour in the current literature. Since season length is predicted to change under future climate scenarios, it is important to understand resulting effects on species dynamics. Previous work has been done on a two-species seasonal model for the great horned owl and its focal prey, the snowshoe hare (Lepus a
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2

Martin, Annik. "Predator-prey models with delays and prey harvesting." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0016/MQ49407.pdf.

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3

Lindström, Torsten. "Predator-prey systems and applications." Licentiate thesis, Luleå tekniska universitet, 1991. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25928.

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4

Liu, Shouzong. "AGE-STRUCTURED PREDATOR-PREY MODELS." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1577.

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In this thesis, we study the population dynamics of predator-prey interactions described by mathematical models with age/stage structures. We first consider fixed development times for predators and prey and develop a stage-structured predator-prey model with Holling type II functional response. The analysis shows that the threshold dynamics holds. That is, the predator-extinction equilibrium is globally stable if the net reproductive number of the predator $\mathcal{R}_0$ is less than $1$, while the predator population persists if $\mathcal{R}_0$ is greater than $1$. Numerical simulations are
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5

Bodey, T. W. "Impacts of predator manipulations on island predator and prey populations." Thesis, Queen's University Belfast, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515898.

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6

Gourley, Stephen Alexander. "Nonlocal effects in predator prey systems." Thesis, University of Bath, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332378.

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7

Chrobok, Viktor. "Harvesting in the Predator - Prey Model." Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-10510.

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The paper is focused on the Predator-Prey model modified in the case of harvesting one or both populations. Firstly there is given a short description of the basic model and the sensitivity analysis. The first essential modification is percentage harvesting. This model could be easily converted to the basic one using a substitution. The next modification is constant harvesting. Solving this system requires linearization, which was properly done and brought valuable results applicable even for the basic or the percentage harvesting model. The next chapter describes regulation models, which coul
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8

Johannesen, Asa. "Predator-prey interactions in aquatic environments." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/7556/.

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In the first half of this thesis, I have focused on predator ability to locate prey using olfaction and how prey aggregation and turbulence affect prey detection. In chapter 2 I investigate the ability of three spined sticklebacks to compensate for loss of visual cues by using olfaction and find that they can use olfactory cues but that these most likely help the fish detect prey rather than locate prey. In chapter 3 I explore the effect of prey aggregation as an anti-predator strategy when avoiding an olfactory predator and find that aggregated prey survive longer than do dispersed prey. In o
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9

Miner, Jeffrey G. "Turbidity-mediated predator-prey interactions among piscivores, prey fishes, and zooplankton /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487685204970099.

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10

Supriatna, Asep K. "Optimal harvesting theory for predator-prey metapopulations /." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phs959.pdf.

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11

Van, Leeuwen Edwin. "Mathmatical Modelling of Predator-Multiple Prey Interactions." Thesis, Royal Holloway, University of London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499202.

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12

Siekmann, Ivo. "Mathematical modelling of pathogen-prey-predator interactions." München Verl. Dr. Hut, 2009. http://d-nb.info/99326039X/04.

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13

Lewis, Danny. "Effects of abiotic stress and predator refuge on terrestrial predator-prey interactions." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9125.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2009.<br>Thesis research directed by: Dept of Entomology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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14

Rosner, Tammy Dee. "Spatial predator-prey dynamics, the effect of prey movement and environmental heterogeneity." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ38608.pdf.

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15

Kato, Motomi. "Effects of enrichment on one-predator-two-prey systems with different prey profitability." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/86465.

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16

Garza, Mark Isaac. "Predator induced defenses in prey with diverse predators." Texas A&M University, 2005. http://hdl.handle.net/1969.1/3309.

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Phenotypic plasticity is an environmentally based change in phenotype and can be adaptive. Often, the change in an organism's phenotype is induced by the presence of a predator and serves as a defense against that predator. Defensive phenotypes are induced in freshwater physid snails in response to both crayfish and molluscivorous fish. Alternative morphologies are produced depending on which of these two predators snails are raised with, thus protecting them from each of these predators' unique mode of predation. Snails and other mollusks have been shown to produce thicker, differently shaped
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17

Pupovac-Velikonja, Ankica. "Environmental factors affecting predator-prey relationships among yeasts." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ39869.pdf.

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18

Jurcak, Ana M. "Defining the reaction space of predator-prey interactions." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1521461052087018.

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19

Sogoni, Msimelelo. "The paradox of enrichment in predator-prey systems." University of Western Cape, 2020. http://hdl.handle.net/11394/7737.

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>Magister Scientiae - MSc<br>In principle, an enrichment of resources in predator-prey systems show prompts destabilisation of a framework, accordingly, falling trophic communication, a phenomenon known to as the \Paradox of Enrichment" [54]. After it was rst genius postured by Rosenzweig [48], various resulting examines, including recently those of Mougi-Nishimura [43] as well as that of Bohannan-Lenski [8], were completed on this problem over numerous decades. Nonetheless, there has been a universal none acceptance of the \paradox" word within an ecological eld due to diverse interpr
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20

Halstead, Brian J. "Predator behavior and prey demography in patchy habitats." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002414.

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21

Topham, Eric. "Biodiversity and ecosystem functioning in predator-prey communities." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:c51b2a47-39bc-4b00-a749-5846ed75675d.

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Once regarded as little more than simple model systems, microbial communities are now understood to drive major earth processes and patterns of biodiversity. In order to more fully understand them, there is a need to investigate the mechanisms that determine the structure and function of microbial systems. Predator-prey interactions have been studied for a long time in macroecological systems and are known for their role in determining community structure and dynamics. Functional diversity has come to the fore of ecology to take a central role in understanding what links species to biodiversit
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22

Lemos, Felipe de. "Spider mite web protects prey and predator alike." Universidade Federal de Viçosa, 2011. http://locus.ufv.br/handle/123456789/3958.

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Made available in DSpace on 2015-03-26T13:30:42Z (GMT). No. of bitstreams: 1 texto completo.pdf: 484977 bytes, checksum: 368d0f7fd7c2f8a96df8c45cef7c69bf (MD5) Previous issue date: 2011-02-22<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Em todo o mundo lavouras de tomate sofrem o ataque de pragas. Uma das principais pragas do tomate é o ácaro vermelho Tetranychus evansi Baker & Pritchard (Acari: Tetranychidae). Uma característica marcante de T. evansi é a sua alta produção de teia sobre suas plantas hospedeiras. Essa teia pode afetar diretamente os inimigos naturais, r
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23

Glaspie, Cassandra N. "Marine benthic predator-prey interactions and global change." W&M ScholarWorks, 2016. https://scholarworks.wm.edu/etd/1539616667.

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Anthropogenic stressors such as habitat loss, extreme weather events, and acidification can change predator-prey interactions. An understanding of the mechanisms by which these stressors impact predator-prey interactions may elucidate the fate of bivalves in the face of global change. My dissertation research informs management of marine resources in Chesapeake Bay, which has experienced substantial seagrass and oyster reef loss, increased storm activity, and combined estuarine and atmospheric CO2 acidification. In my dissertation, I used field survey data, field caging experiments, laboratory
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24

Go, Dong-Hun. "Three Essays in Economics of Prey-Predator Relation." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7031.

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This dissertation explores how natural ecosystem can be integrated with economic system through two case studies of multiple species interactions, or predator-prey relations. By the inclusion of biological, ecological and economic aspects, the integrated approaches aim at more clearly understanding of how regional ecosystem and economy interact with each other, given threats of resource extinction and environmental shock. I also explain strategies and policy regimes that can be considered to achieve efficient and sustainable ecosystem management in those circumstances. The first case study foc
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25

Nyström, Jesper. "Predator-prey interactions of raptors in an arctic environment." Doctoral thesis, Stockholm University, Department of Zoology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-259.

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<p>This thesis concerns the predator-prey interactions of three raptor species in a Swedish arctic community: the gyrfalcon (<i>Falco rusticolus</i>), the rough-legged buzzard (<i>Buteo lagopus</i>) and the golden eagle (<i>Aquila chrysaetos</i>).</p><p>The gyrfalcon behaved like a highly specialised ptarmigan (<i>Lagopus spp.</i>) predator. Gyrfalcon’s functional response to ptarmigan was close to density independent, and ptarmigan remained the dominating prey even in areas with the lowest ptarmigan density. The gyrfalcon did not respond functionally to microtine rodents (i.e. lemmings and vo
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26

Jonsson, Peter, and Lucas Ljungberg. "Flocking as a Hunting Mechanic: Predator vs. Prey Simulations." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-208375.

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Creating models for simulating real-life situations can be a difficult task because of all the small factors that can impact the outcome of an event. One model aimed to accurately predict flocking behaviour for animals is Boids flocking model. In this study, we aim to answer if the model is adequate for modeling a predator vs. prey situation. And if it is not, we aim to conclude what factors is needed to increase the accuracy of the model. The conclusion is that flocking is mainly a defensive tool, and that the Boids flocking model does not model predator actions accurately. To adequately mode
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27

Brodin, Tomas. "Predator effects on behaviour and life-history of prey." Doctoral thesis, Umeå : Dept. of Ecology and Environmental Science, Univ, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-629.

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28

Nyström, Jesper. "Predator-prey interactions of raptors in an arctic community /." Stockholm : Zoologiska institutionen, Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-259.

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29

Tjahjadi, Ir Nur. "Studies on predator - prey interactions in a grassland soil." Thesis, Bangor University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320412.

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30

Ioannou, Christos. "The importance of predator behaviour on risk to prey." Thesis, University of Leeds, 2008. http://etheses.whiterose.ac.uk/275/.

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Both predator and prey have evolved to maximise reproductive success by balancing food intake with risk. There has been a bias in predator-prey studies, where prey behaviour has been examined in detail, yet predators are assumed to follow simplistic rules. I use three-spined sticklebacks predating upon invertebrate prey to test a range of ways in which prey risk was hypothesised to be affected by predator behaviour. The relationship between encounter rate and prey density has been recently shown not to be directly proportional, and theoretical arguments have been made that predator search beha
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31

Hooks, Alexandra. "Prey Plasticity Responses to a Native and Nonnative Predator." Thesis, State University of New York at Stony Brook, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1553894.

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<p>Phenotypic plasticity in response to environmental stimuli is exceedingly common across systems and taxa. For instance, predation risk in many gastropods can induce a variety of defenses including growing thicker shells, growing shells of different shapes, and developing apertural teeth. However, the role of coevolution between species that produce these defense responses and their consumers is not well known. This thesis examines the responses of an ovoviviparous gastropod (<i>Littorina saxatilis</i>) with low dispersal from three different habitats (marsh habitat, rocky habitat, and cobbl
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32

Reid, Keith. "Predator-prey interactions in the South Georgia marine ecosystem." Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250244.

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33

Egilmez, Halil Ibrahim. "Mathematical modelling of predator-prey dynamics in complex environments." Thesis, University of Leicester, 2018. http://hdl.handle.net/2381/42495.

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The main aim of mathematical ecology is to explore interactions among organisms and the environment where they live, and predator-prey interaction is one of the major type of interactions observed in nature. Models of predator-prey systems - mathematically described by ODEs, PDEs or integro-differential equations - have a long and illustrious history starting from the seminal works by Lotka and Volterra. However, despite a large number of existing publications in the literature, some fundamental questions related to this type of systems still remain open. For example, the spatial heterogeneity
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34

Mullan, Rory. "The computational modelling of large scale predator-prey ecosystems." Thesis, Ulster University, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.665505.

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Predator-prey modelling involves computationally simulating predator-prey relationships which are observable in nature. Predator species hunt and consume prey species, forming an ecosystem where the population sizes of the various species are interdependent. The models take the form of mathematical equations, where a set of coupled equations model the effect that predator and prey species have upon each other, with the modelling either taking place on a continuous or discrete time basis. Generally to date, the majority of research into the modelling of predator-prey ecosystems has concentrated
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35

May, Cassandra J. "Habitat Mapping and Predator-Prey Dynamics in Ohio Resevoirs." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1364461349.

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36

Wood, Tyler C. "Ecological Effects of Predator Information Mediated by Prey Behavior." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu158592647245611.

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37

Snyder, Gretchen Beth. "Mechanisms driving increased prey consumption with increasing predator diversity." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Dissertations/Summer2009/G_Snyder_051509.pdf.

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38

Hoso, Masaki. "Handedness coevolution : predator-prey interaction drives speciation in snails." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136933.

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39

Arancibia-Ibarra, Claudio Andres. "Temporal and spatio-temporal dynamics in predator-prey models." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/204160/1/Claudio_Arancibia%20Ibarra_Thesis.pdf.

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This thesis analyses temporal and spatio-temporal modified Holling-Tanner predator-prey models with alternative food for predators. Different types of functional responses and a density-dependent phenomenon called Allee effect(s) on the prey were considered. By using analytical and numerical analysis, the stability of the equilibrium points for the different combinations of modifications were proven. The necessary conditions for the models to undergo a different type of bifurcation were illustrated. Additionally, this thesis has provided numerical evidence where the Turing instability leads to
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40

Soresina, C. "PREDATOR-PREY MODELS: BIFURCATIONS, CROSS-DIFFUSION AND TURING INSTABILITY." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/489546.

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Questa tesi riguarda modelli differenziali preda-predatore, trattati inizialmente nel caso spazialmente omogeneo e successivamente considerando la diffusione spaziale. Dal punto di vista matematico pertanto vengono considerati sistemi di equazioni differenziali ordinarie e di equazioni differenziali alle derivate parziali di tipo parabolico. In particolare, nella prima parte viene studiato un modello preda-predatore spazialmente omogeneo, retto da due equazioni differenziali ordinarie, in cui sono presi in considerazione un effetto Allee forte nella crescita delle prede e una risposta funzi
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41

Chakraborty, Aspriha, and achakraborty@swin edu au. "Numerical study of biological problems in a predator-prey system." Swinburne University of Technology, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20060608.151547.

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The logistic Lotka-Volterra predator-prey equations with diffusion based on Luckinbill's experiment with Didinium nasutum as predator and Paramecium aurelia as prey, have been solved numerically along with a third equation to include prey taxis in the system. The effect of taxis on the dynamics of the population has been examined under three different non-uniform initial conditions and four different response functions of predators. The four response functions are Holling Type 2 Response, Beddington Type Response or Holling Type 3 Response, a response function involving predator interference a
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42

Russell, Benjamin Gallard School of Biological Earth &amp Environmental Sciences UNSW. "The role of odour in Australian mammalian predator/prey interactions." Awarded by:University of New South Wales. School of Biological, Earth and Environmental Sciences, 2005. http://handle.unsw.edu.au/1959.4/25144.

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Odour plays an important role in many predator/prey interactions. In the northern hemisphere, many mammalian prey species have been shown to respond to predator odours. It is also widely assumed that mammalian predators utilise odours to locate their prey. This thesis explores the importance of odour in Australian mammalian predator/prey interactions. Responses of native Australian species to the faecal odour of two predators; the native tiger quoll Dasyurus maculatus and the introduced red fox Vulpes vulpes, were evaluated through live-trapping and focussed behavioural studies of captive anim
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43

Paltridge, Rachel M. "Predator-prey interactions in the spinifex grasslands of central Australia." School of Biological Sciences - Faculty of Science, 2005. http://ro.uow.edu.au/theses/255.

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Predation by exotic predators (cats Felis catus and foxes Vulpes vulpes) is believed to be one of the factors that has contributed to the decline of medium-sized mammals in arid Australia. Other factors include habitat degradation by introduced herbivores (rabbits Oryctolagus cuniculus and grazing stock) and altered fire regimes after Aboriginal people moved into permanent settlements. In general, the impact of exotic predators on arid zone mammals is believed to be significant only when predator numbers have been elevated by increased food availability from exotic prey species (rabbits, house
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44

Ptak, Marcianna. "Effects of small-scale turbulence on microzooplankton predator-prey interactions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ36167.pdf.

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45

Rijn, Paul Cornelis Jacobus van. "The impact of supplementary food on a prey-predator interaction." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2002. http://dare.uva.nl/document/65999.

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46

Lambert, Carey. "A genetic approach to predator-prey interactions in Bdellovibrio bacteriovorus." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394919.

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Xavier, Jose Carlos Caetano. "Predator-prey interactions between albatrosses and cephalopods at South Georgia." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619590.

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48

Hentley, William Thomas. "Global change and predator-prey interactions on a woody perennial." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/73054/.

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The impacts of global change on ecosystems from climate change and invasive species are likely to be complex. Rising atmospheric CO2 concentrations, the associated climate forcing and greater frequency of extreme weather are serious challenges to natural ecosystems. In tandem with climate change, globalisation has led to the spread of invasive alien species around the globe that threaten to interrupt food web dynamics. Advancing understanding of the effects of global change on trophic interactions therefore requires study of interspecific and multi-trophic interactions. The aim of this thesis
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49

Blackledge, Todd A. "Stabilimenta in spider webs : predator-prey conflict and sensory drive /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488193665233812.

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50

Wright, John Matthew. "Impacts of ocean acidification on predator – prey interactions of molluscs." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/18004.

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Elevations in atmospheric carbon dioxide (CO2) are anticipated to lead to the acidification of the world’s oceans over the next century. This thesis sought to understand the fate of the predator-prey interactions between the endemic predator, the Mulberry whelk Tenguella marginalba (Blainville, 1832) and their prey the native Sydney rock oyster Saccostrea glomerata (Gould, 1850) and the recently introduced Pacific oyster Crassostrea gigas (Thunberg, 1793) in a marine environment increasingly affected by elevated pCO2. It was predicted that predator-prey relationships will be altered by exposu
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