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 29 for “"predator-prey dynamics"”.
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Habitat Mapping and Predator-Prey Dynamics in Ohio Resevoirs
… explicit information about temperature, prey availability, depth, slope, and substrate to predict saugeye habitat use. Using telemetry we mapped saugeye locations to assess factors that influence saugeye habitat use. Saugeye were tagged with a radio tag for location. Hydroacoustics were …
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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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Dynamics of marine zooplankton : social behavior ecological interactions, and physically-induced variability
… krill often assemble in swarms and schools, the dynamics of which have important ecological consequences. Mathematical and numerical models are employed to study the interplay of biological and physical processes that contribute to the observed patchiness. The evolution of social behavior is …
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DYNAMICS OF MICROCYSTIS-INFECTING CYANOPHAGES IN TROPICAL FRESHWATERS THROUGH QPCR AND NEXT GENERATION SEQUENCING
… of environmental variables (monsoon seasons) on predator-prey dynamics and leveraged on NGS to circumvent the lack of established molecular assays for the quantification of cyanophages to gain an overview on the diversity and dynamics of the viral community in tropical freshwaters.
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Interacting populations : hosts and pathogens, prey and predators
… the interaction at the expense of the other. Predators kill their prey instantly and use it only for food, whereas parasites use their hosts both as their habitat and their food. I am particularly interested in microbial parasites (including bacteria, fungi, viri, and some protozoans) since …
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Interacting populations : hosts and pathogens, prey and predators
… the interaction at the expense of the other. Predators kill their prey instantly and use it only for food, whereas parasites use their hosts both as their habitat and their food. I am particularly interested in microbial parasites (including bacteria, fungi, viri, and some protozoans) since …
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Drivers of Productivity of Montane and Boreal Breeding Ducks
… weather; (iii) density dependence; and (iv) predator-prey dynamics. To test these hypotheses, I used long-term datasets from two distinct breeding areas: a montane site at Red Rock Lakes (RRL) Montana, USA, and a boreal site, the Yellowknife Study Area (YKSA) near Yellowknife, Northwest …
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Land use influence on biodiversity and activity patterns of predators and prey in the semi-arid drylands of South Africa
… compared to protected areas and 3) how prey species adjust their activity with and without apex predators and 4) whether lunar illumination influences the activity of heavily persecuted species on farmland and predator-prey interactions in protected areas. I used camera trap surveys …
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Wolf Selection of Human-Modified Linear Features and Cover Types When Hunting and Killing White-Tailed Deer Fawns
<p>Predators must optimize and adapt foraging behavior for multiple spatial scales to take advantage of abundant and vulnerable prey. Wolves (<em>Canis lupus</em>) live in human-modified landscapes where anthropogenic disturbances and landscape alterations can influence predator-prey dynamics. In …
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Dynamics of marine zooplankton : social behavior, ecological interactions, and physically-induced variability
… krill often assemble in swarms and schools, the dynamics of which have important ecological consequences. Mathematical and numerical models are employed to study the interplay of biological and physical processes that contribute to the observed patchiness. The evolution of social behavior is …
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Behavioural Ecology of Large Tuna
… (Thunnus thynnus, ABT), large migratory apex predators with exceptional physiological capacity, as a model system to examine behavioural responses to stressors operating across contrasting temporal scales. Chapter 3 documents an opportunistic 19-minute predation event by an orca, revealing …
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Hide and seek : a multidisciplinary study on the ecological success of an estuarine dweller
… relies on comprehensive information on anti-predator adaptations and trophic relationships among species. The present study focuses on two key traits of the brown shrimp Crangon crangon L. (Decapoda: Caridea), a key component of European sandy shores, namely i) its ability to conceal from …
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The influence of rainfall on the Verreaux's eagle and its prey species in the Matobo hills, Zimbabwe
… Eagle (Aquila verreauxii) and its primary prey species the Rock Hyrax (Procavia capensis) and Yellow-spotted Hyrax (Heterohyrax brucei) have been monitored by a long-term citizen science project in the Matobo Hills, Zimbabwe. A previous study associated rainfall patterns with the …
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Ecological consequences of genetic variation in foraging behaviors of a predatory mite
Foraging traits such as prey consumption rate and the efficiency with which predators convert their prey into offspring are important determinants of local predator-prey dynamics. However, in environments with patchy prey distribution, predator dispersal and aggregation in response to prey-induced …
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Resource selection and abundance estimation of moose: Implications for caribou recovery in a human altered landscape
… across Canada due to human disturbance altering predator-prey dynamics. The niche specialization of caribou enables them to survive in nutrient-poor habitats spatially separated from other ungulates and their shared predators. The conversion of old-growth forests to young seral stands is …
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Resource selection, predation risk, and population dynamics of woodland caribou
… through changes to apparent competition dynamics within the predator-prey community. Apparent competition occurs as a negative indirect interaction between prey species, mediated by their direct interactions with a shared predator. I first review apparent competition, and show that across …
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Resource selection and abundance estimation of moose: Implications for caribou recovery in a human altered landscape
… across Canada due to human disturbance altering predator-prey dynamics. The niche specialization of caribou enables them to survive in nutrient-poor habitats spatially separated from other ungulates and their shared predators. The conversion of old-growth forests to young seral stands is …
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Resource selection, predation risk, and population dynamics of woodland caribou
… through changes to apparent competition dynamics within the predator-prey community. Apparent competition occurs as a negative indirect interaction between prey species, mediated by their direct interactions with a shared predator. I first review apparent competition, and show that across …
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An investigation of the growth and feeding responses of oligotrich ciliates to food types and concentrations : an approach to assessing the potential of marine planktonic ciliate blooms
… ciliates and were used in a model to examine predator-prey dynamics of ciliates and 8 Am algae. The ciliates Strombidinopsis acuminatum, Strobilidium spiralis, Strobilidium sp., Strombiclium acuminatum, and Strombiclium capitatum were isolated from British Columbian waters and maintained in …
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