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 37 for “"prey capture"”.
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Detection and Isolation of Prey Capture Events in Animal-Borne Images
Understanding the foraging habits and prey availability for a species is crucial. Prey availability is crucial to a species' survival and sustainability of the food pyramid. Identifying the type of prey consumed also allows ecologists to determine the energy received, while the duration and extent …
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The effect of habitat structure on reproduction and prey capture of a rare carnivorous plant, Pinguicula lutea
… of habitat structure on reproduction and prey capture of carnivorous plant species in this region. The studies described in this thesis aim to address this deficit. Chapter 1 provides a general introduction to carnivorous plants, focusing primarily on Pinguicula species. In this chapter, I …
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The effect of prey availability on metabolism and activity in the tarantula <i>phormictopus cancerides</i> (araneae: theraphosidae)
… differences between the two groups in (1) prey capture rates, (2) time to prey capture, (3) locomotory activity, and (4) the predator’s prey detection distance. RMRs increased for the well-fed group but remained consistent for individuals, fed only once a month. Time to prey capture …
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How animal movement defines behaviour: new insights into the ecology of seabirds at sea
… practice when defining periods of search and prey capture behaviour. In chapter 3, I show how environmental features may ultimately disrupt the expected movement of optimal foraging, and show that Atlantic puffins, Fratercula arctica, in southeast Ireland have departed from classic Area …
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Modulation of Intraoral Subambient Pressure and Feeding Behavior Relative to Prey Type in the Largemouth Bass, Micropterus Salmoides Floridanus
… of suction feeding performance across two prey location treatments, as measured by peak subambient pressure generation, was studied in the Florida largemouth bass, <em>Micropterus salmoides floridanus. </em>Previous studies of suction feeding in centrarchids have excluded possible sources …
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The Effect of Acute Low pH on Feeding and Locomotor Activity of Larval Fathead Minnows, Pimephales promelas
… conditions: (1) light conditions with live prey (LL), (2) light conditions with dead prey (LD), (3) dark conditions with live prey (DL) and (4) dark conditions with dead prey (DD). Each treatment regime was designed to isolate different sensory modalities available for prey capture. Temporal …
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An investigation of the stickinness mechanism and the role of nodes in cribellar spider capture thread
Sticky prey capture threads are produced by many members of the spider Infraorder Araneomorphae. Cribellar threads are plesiomorphic for this clade, and adhesive threads are apomorphic. The surface of cribellar thread is formed of thousands of fine fibrils. Basal araneomorphs produce cylindrical …
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Echolocation-based foraging by harbor porpoises and sperm whales, including effects of noise and acoustic propagation
… and level of their echolocation clicks during prey capture events; detail the differences in echolocation behavior between different animals and in response to differences in prey fish; and show that, unlike bats, porpoises continue their echolocation buzz after the moment of prey capture. …
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The Computational Neuroethology of Weakly Electric Fish: Body Modeling, Motion Analysis, and Sensory Signal Estimation
… stream (≈14,000 afferents) over the course of prey capture trials. Analysis of the tracking data showed how Apteronotus modified the position of its electrosensory array during predatory behavior and demonstrated that the fish use a closed-loop adaptive tracking strategy to intercept prey. In …
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Echolocation-based foraging by harbor porpoises and sperm whales, including effects of noise and acoustic propagation
… and level of their echolocation clicks during prey capture events; detail the differences in echolocation behavior between different animals and in response to differences in prey fish; and show that, unlike bats, porpoises continue their echolocation buzz after the moment of prey capture. …
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Studies on the mode of CRF action in the optic tectum of the African Clawed Frog, Xenopus laevis
… to decision making on predator avoidance/prey capture tradeoffs. The neuropeptide corticotropin releasing factor (CRF) modulates discrete aspects of prey capture and predator avoidance, but the mechanisms underlying this modulation are unknown. This dissertation consists of my research …
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Accelerated cooperative co-evolution on multi-core architectures
… the benchmark tasks; double pole balancing and prey-capture, for single and multi-agent systems respectively, in tasks of increasing complexity. We observe a maximum speed-up of 20x for the parallel Multi-Agent ESP implementation over our single core optimized version in the prey-capture task …
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Steering Laws for Pursuit
… parallel to a fixed line. In observations of prey pursuit trajectories of echolocating bats, it has been noted that the same geometrical condition of eventual parallelism holds. We hypothesize that a steering law of the same form as discussed here for motion camouflage with respect to …
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Characterication of aggregate gland silk factor 1
… that these proteins play an important role in prey capture in cobweavers.</p>
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Moths fight back: arms race in the cloud forest
… by moths reduce the cues that bats use for prey capture including the amplitude modulation of echoes from wingbeats. Moths produce the biggest returning echoes for frequencies between 20 to 35 kHz, which coincides with the frequencies used by most insectivorous bats in the location. The …
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The evolution of coordinated cooperative behaviors
… of animals. Predators may team up to hunt large prey that they cannot catch on their own, while prey can herd together for defense. This dissertation focuses on understanding the environmental factors and cognitive architectures underlying the evolution of coordinated cooperation. An agent-based …
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Home range and activity in a Virginia population of Sceloporus undulatus
… males. The frequencies of other behaviors (e. g. prey capture) did not differ between the sexes. Only one activity, substrate licking by males, seemed to decrease significantly as a function of date. Male home range owners interacted socially with females during the post-reproductive period. This …
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Effects of Turbidity on Anti-Predator Response and Foraging Behavior in the Fountain Darter, Etheostoma fonticola
… impact anti-predator response. I also found that prey consumption and time spent searching for prey were significantly altered across three levels of low to medium turbidity compared to clear water. Prey-capture success was not affected by increased turbidity. Thus, foraging behavior is …
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Sound use, sequential behavior and ecology of foraging bottlenose dolphins, Tursiops truncatus
… and timing of clicks as they progress towards prey capture. For odontocetes, however, we do not know enough about their foraging behavior to describe such sequences. To conduct detailed behavioral observations of any subject animal, the observer must be able to maintain continuous visual …
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Sound use, sequential behavior and ecology of foraging bottlenose dolphins, Tursiops truncatus
… and timing of clicks as they progress towards prey capture. For odontocetes, however, we do not know enough about their foraging behavior to describe such sequences. To conduct detailed behavioral observations of any subject animal, the observer must be able to maintain continuous visual …
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