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 32 for “"Foraging patterns"”.
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Are foraging patterns of aerial predators influencing diurnal activity of their prey?
… predators (raptors) influence diurnal activity patterns of their prey (mice). Sampling of both raptors and mice was done simultaneously during autumn, winter and spring at two different study sites in three different habitats on South Africa's arid west coast. Sixty PVC mouse traps were checked …
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Foraging ecology and parental care of common terns (Sterna hirundo) nesting in Windermere Basin, Lake Ontario
… chick feeding, size and type of prey item, and foraging time away from the brood have not been well studied in seabirds. This study investigated spatial and temporal patterns of foraging and chick-provisioning among 23 radio-tagged male common terns nesting at Hamilton Harbour, Lake Ontario …
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The Influence of Reproductive Condition and Roost Type on Thermoregulation and Foraging in Big Brown Bats (Eptesicus Fuscus)
… time constraints, such as thermoregulatory and foraging flexibility, but typically at a cost. However, foraging and thermoregulation are often studied separately, which leads to limited knowledge about what, if any, relationship exists between these two factors. The purpose of my research was to …
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Dynamics of Self -Organization of Ramified Patterns in an Electromechanical System
… in how the detailed structure of ramified patterns affects the properties of systems that use them for transportation. Therefore, in collaboration with researchers at the Santa Fe Institute, we theoretically explore a biological system: ant foraging colonies. These are commonly known to …
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Modeling Size Dependent Interactions of a Juvenile Piscivore: Implications for Growth and Survival
The influence of size-specific interactions on foraging and mortality has consequences for growth and recruitment of juvenile fish. Many juvenile piscivores, such as walleye (Stizostedion vitreum), undergo ontogenetic diet shifts switching from zooplanktivory to benthivory and, finally, piscivory. …
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Polar Bear (Ursus Maritimus) Foraging Ecology in the Western Canadian Arctic
… top of the Arctic marine food web, polar bear foraging patterns can provide insights on ecosystem structure and function both spatially and temporally. This thesis used quantitative fatty acid signature analysis (QFASA) to estimate the diets, and adipose tissue lipid content to estimate the …
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Environmental constraints on human memory
During foraging, animal travel appears to be periodic, smooth and regular. However, a closer examination of animal search patterns suggests that foraging displays a fractal pattern known as Lévy flights. Lévy flights or Lévy distributions are positively skewed; heavy-tailed distributions that …
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A multi-indicator approach to dietary assessments within Lake Michigan's nearshore area
… the 2010 intensive sampling year, I: 1) examined foraging patterns of juvenile yellow perch (Perca flavescens) using stomach content, fatty acid signature, and stable isotope analyses; 2) employed stomach content, fatty acid signature, and stable isotope analyses to examine how dietary overlap …
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Foraging ecology and population structuring of baleen whales in the western South Atlantic and eastern South Pacific
… gaps in our understanding of the migration, foraging localities, prey choice and population connectivity of whales in the Southern Hemisphere as they recover, the impact of these populations on marine ecosystems, and how they are likely to respond to the ongoing climate crisis. Historic …
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The diet and foraging ecology of chick-rearing gannets on the Namibian islands in relation to environmental features : a study using telemetry
… showed significant differences in their foraging patterns. Birds from Ichaboe had shorter foraging trips (24.3 hrs vs 29.4 hrs),traveled shorter distances away from their island (130 km vs 197 km) and had shorter foraging path lengths (422 km vs 673 km). Birds from Ichaboe foraged in two …
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Black howler monkey (Alouatta pigra) nutrition: Integrating the study of behavior, feeding ecology, and the gut microbial community.
… examine shifts in primate activity budgets and foraging patterns across seasons and life history stages. However, few studies establish a direct relationship between activity and diet composition and energy and nutrient intake. Additionally, the mechanisms that primates use to digest and …
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Neural Mechanisms that Control an Innate Foraging Behavior in Caenorhabditis Elegans
… for survival. Thus, animals modify their foraging patterns based on recent experience and current conditions to increase their likelihood of finding food. One highly conserved foraging strategy is local search, an intensive exploration over several minutes of the region where food …
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Determining Critical Internesting and Foraging Habitats for the Conservation of Sea Turtles in Gabon, Africa Using Satellite Tracking and Stable Isotope Analysis
… currently underway. Additionally, post-nesting foraging sites are not well defined for this population. δ13C and δ15N stable isotope analysis of 149 epidermis samples from female nesting olive ridley turtles in Gabon, 38 of which also had satellite transmitters, was used to determine if distinct …
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Diet overlap and habitat segregation between redbreast sunfish and age-o smallmouth bass in the North Anna River, Virginia
… but were never scarce. Bass and sunfish foraging behaviors were different, particularly in late summer. Microhabitat used by bass and sunfish was assessed by snorkeling and measuring eight variables in early and late summer. Multivariate analyses revealed that distance from shore was the …
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A Hybrid CUSUM approach to identify residency and transition periods for animal movement with an application to housed dairy cows
… data and gather information such as bouts of foraging behaviour in wild animals, understanding how an animal’s movements relate to the resources within an environment or to provide potential indicators of animal welfare. The aim of this report is to develop an automated behavioural …
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Tracking African penguins (Spheniscus demersus) outside of the breeding season: Regional effects and fishing pressure during the pre-moult period
… these species. A lack of knowledge regarding foraging areas when not breeding has been identified as a deficiency in management planning for African penguins. Satellite transmitters were deployed on 20 adults during the pre-moult foraging period from colonies on the west coast (Dassen Island, …
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Understanding and mitigating vulnerable bycatch in southern African longline and trawl fisheries
… Albatrosses reveal striking differences in their foraging patterns and presents evidence that Black-browed Albatrosses, in particular, forage to a large extent on natural prey, despite the availability of discards from fishing vessels in the Benguela. Therefore, given the high albatross mortality …
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Integrative perspectives of wild and captive sifaka conservation
… and anthropogenic factors on movement and foraging patterns. I found that movement rates and core area use were greater in the rainy season than in the dry season. My findings also indicated that roads and human villages influenced the locations where sifakas choose to forage, demonstrating …
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Anomalous transport through porous and fractured media
… and fractured geologic media, animal and human foraging patterns, tracer diffusion in biological systems, and transport in complex networks. Understanding the origin of anomalous transport is essential, because it determines the likelihood of high-impact, low-probability events and therefore …
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Echolocation in wild killer whales (Orcinus orca)
… populations with different feeding habits and foraging patterns. The study provides new insight into the functional role of odontocete echolocation, and into the relative contributions of vision and passive listening to spatial perception and prey detection. Underwater recordings were made …
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