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 15 of 15 for “"host-seeking behavior"”.
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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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Studies on Host-Seeking Behavior and Differential Chemosensory Gene Expression in Above- and Below-ground Culex Pipiens
… can hybridize in nature. I characterized the behavioral and genetic variation across eight populations collected from above- and below-ground habitats. Three of the five above-ground populations had hybrid ancestry in our single locus assay, whereas the below-ground populations did not. In …
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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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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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From Microarrays to Behavior: Genes Controlled by Feeding State in Mosquitoes and Flies
… the release of peptides that modulate feeding behavior (Benarroch, 2010; Berthoud, 2008). Although many of these neuronal populations have been identified in rodent models, the neural circuitry behind behavioral modification of food intake remains largely unknown. Insects like the blowfly and …
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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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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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Behavioral Ecology and Associated Virology of Mosquito-Host Interactions in Southern California
<p>Elucidating characteristics of mosquito-host interactions are critical for understanding the ecology and epidemiology of mosquito-borne diseases. In this dissertation, I conducted three studies to explore potential mosquito-host interactions and associated virus infection rates. I first …
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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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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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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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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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Mosquito odor receptor gene targets to alter vector host choice
Olfaction plays an important role in mosquito behaviors, including foraging for nectar and identifying potential hosts for a blood meal. Mosquitoes detect semiochemicals through odorant receptors, each of which interact with specific odorants. Differences in feeding behaviors have significant …
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Mosquito Odorant Receptors: C-terminal Motifs, Subfamily Expansion, and Function
… best examples of this is the olfactory driven host-seeking behavior displayed by female mosquitoes. Although mosquitoes are capable of extracting blood from a variety of hosts many mosquito species show marked preferences for particular host species. Mosquitoes displaying preference for humans …