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 38 for “"host seeking"”.
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Multimodal Strategies of Host-Seeking Mosquitoes
… thermosensation, and vision, to hunt human hosts and obtain a blood-meal for egg production. Any individual sensory cue is an incomplete signal of a human host, and so a mosquito must integrate multimodal sensory information before committing to approaching and biting a person. Mosquito …
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Host-seeking behaviour in the malaria vector Anopheles Gambiae
… The aim of this project was to examine the host-seeking behaviour of female An. gambiae to identify behavioural attributes that could be exploited in the design of novel trapping systems. To facilitate this, a wind tunnel arena with three-dimensional video-tracking was developed to quantify …
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Insect Host Seeking: Investigations into the Molecular Mechanisms of Chemosensation
… chemosensory systems play a crucial role in the host-seeking behaviors of insects that allow them to find their preferred food sources. Quite often, however, these host-seeking behaviors have a negative impact on either human health or livelihood. The following details investigations into the …
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The Neuropeptide Regulation of Host-Seeking Behavior in Aedes Aegypti Mosquitoes
… with the ability of a mosquito to locate a human host for a blood meal. Currently, the mechanistic basis of host-seeking and its regulation remain incompletely understood. Although it is known that mosquitoes require human odor cues to locate a human host, the critical odor components and …
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The Ecology Of Host-Seeking Mosquitoes Within The Red River Valley Of Central North Dakota
<p>Host-seeking mosquitoes are taxing for people and wildlife alike in the Red River Valley (RRV). During the summer massive numbers of mosquitoes swarm the RRV, yet little is known about the ecology and biology of the mosquito species that inhabit this area. This research will help to fill some of …
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Landing behaviour of the host seeking malaria vector anopheles coluzzii in response to host associated cues
… Although much research has focussed on host-seeking behaviour, less is known about the close-range phase, including landing and post-landing behaviour. Thus, this research aimed to 1) quantify the relative effect that host-associated stimuli have on landing response, 2) quantify the …
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Exploring Mosquito Thermal Biology and Chemical Ecology in the Context of Host-Seeking and Climate Change
… cues of three Culex species which vary in host preference and climate of origin. The second project explores the effects of different rearing temperatures and regions of origin on the thermal performance, life-history traits, and nutrient reserves of Ae. albopictus mosquitoes. The third …
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Studies on Host-Seeking Behavior and Differential Chemosensory Gene Expression in Above- and Below-ground Culex Pipiens
… tests, four above-ground populations were avian-seeking, while the fifth showed no clear preference. All three belowground populations predominately sought the human host. Genetic ancestry was not correlated with host preference. Chemosensation drives host-seeking behaviors in female mosquitoes, …
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Effects of habitat and plant volatiles on mosquito spatial, seasonal, and chemical ecology
… nectar, required for metabolic processes, and host odors, which will help them navigate towards hosts, source of the blood required for producing eggs. Mosquitoes interpret and respond to chemical volatiles very differently depending on their environment (temperature, humidity, time of day, …
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Dynamics of La Crosse virus: Surveillance, Control and Effect on Vector Behavior
… the effect of virus infection on mosquito host-seeking and neurotransmitter levels, and 3) to determine the effectiveness of barrier sprays to control infected mosquito vectors. Our surveillance study demonstrated the involvement of an invasive species, Aedes japonicus, in the transmission …
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From Microarrays to Behavior: Genes Controlled by Feeding State in Mosquitoes and Flies
… were previously shown to display reduced host-seeking behavior for forty-eight hours after taking a bloodmeal (Takken et al., 2001). We used whole genome microarrays to look for genes that are regulated in olfactory tissue by blood-feeding, and that therefore might function to modify …
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A deeper look into the morphology and receptors found in the tick (Acari: Ixodidae) chemoperception structure, the Haller's organ
… structure unique to ixodid ticks that assists in host seeking behaviors. Presented here are the results of a detailed comparative study of the morphology and the chemoperception gene expression of the Haller’s organ. The morphometrics study focuses on the three important North American tick …
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Variations in Time-Dependent Mosquito-Host Interactions Across Aedes Species
… circadian clocks like their vision, olfaction, host-seeking, mating, oviposition, metabolism, locomotion, and more. However, how the circadian clock regulates mosquito-host interactions and adapts to specific environmental conditions remains largely unknown, despite its importance to vector …
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Response to visual threats in Aedes aegypti mosquitoes
… by transmitting parasites and viruses to their hosts, kill several hundred thousand people every year. Mosquito populations are currently developing raising levels of insecticide resistance, and there is a need for a better understanding of their behavior so that new control solutions can be …
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Two Odorant-Binding Protein Genes in Mosquitoes: Comparative Genomics, Expression, and Function
… to understand the molecular basis of mosquito host-seeking behavior. However, no direct evidence has been found for specific functions of any mosquito OBPs. In this study, I describe the comparative genomics and expression analyses on two mosquito Obp genes (Obp1 and Obp7) as well as efforts to …
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Non-Canonical Odor Coding Ensures Robust Mosquito Attraction to Humans
… reproduction. Aedes aegypti prefer to bite human hosts, which contributes to their effectiveness as a deadly disease vector. Mosquitoes rely heavily on chemosensory cues, including carbon dioxide (CO2) emitted from breath and human body odor, which is a mixture of more than 200 different …
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The Genetic and Neural Basis of Sexual Dimorphism in Mosquito Behavior
… contrast, male mosquitoes have no drive to seek hosts or drink their blood. Through the act of blood-feeding, only female mosquitoes can transmit pathogens that cause deadly diseases like dengue, chikungunya, and Zika. The genetic and neural circuit basis of this striking sex difference in …
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An investigative study on the effects of black fly (diptera: simuliidae) sugar meals on reproductive success and parasite transmission /
… distilled water. Results demonstrated that: (1) host-seeking female Prosimulimfuscum/mixtum and Simulium venustum maintained on artificial honeydew did not survive longer than those maintained on artificial nectar when fed ad libitum; (2) fiiUy engorged S. venustum and Simulium rugglesi …
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Factors Influencing Sugar Feeding in Invasive Mosquitoes
… as most research effort has been concentrated on host-seeking behavior and pathogen transmission. As mosquitoes are the deadliest animals on earth and because challenges, such as the rise of insecticide resistance, arise, there is an urgent need for developing effective and ecologically friendly …
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Exploiting Sugar Feeding Behaviors For Mosquito Control
… research has been conducted on hematophagy and host-seeking behaviors, but relatively little is known about phytophagy. Sugar feeding is an essential aspect of mosquito biology. Both male and female mosquitoes must consume sugar as a primary fuel source. Mosquitoes use olfactory and visual cues …
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