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 26 for “"proboscis"”.
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Comparative Morphology of Sensilla Styloconica on the Proboscis of North American Nymphalidae and Other Selected Taxa: Systematic and Ecological Considerations.
Sensilla styloconica on the proboscis of 107 species of North American and tropical butterflies were comparatively studied using the scanning electron microscope. Focus was on 76 species of North American Nymphalidae representing 45 genera and 11 subfamilies. Nomenclature for generalized and …
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Structure, function, and functional morphology of Mitra idae Melvill 1893 and M. catalinae Dall 1920
<p>The morphology of the proboscis--particularly the epiproboscis, the feeding behavior, the function(s) of the epiproboscis, and the functional morphology of the epiproboscis, were studied in Mitra idea Melville and fi. catalinae Dall (Gastropoda: Neogastropoda; Mitridae.</p> <p>In M. idae, the …
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Floral evolution of long-tubed Erica species
… by a tabanid which has a fixed forward-pointing proboscis, while the vertical flowers of E. ampullacea are pollinated by a nemestrinid which can swivel its proboscis downwards. The nemestrinid in turn has a shorter proboscis which prevents it from accessing nectar in the long-tubed E. shannonea. …
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Why do mosquitoes use two modes of drinking? An analytical test of a blockage clearing hypothesis
… food through a long drinking channel termed as proboscis. Experimental investigations of mosquito drinking using synchrotron x-ray indicate two modes of drinking, a predominantly occurring continuous mode in which the anterior cibarial and posterior pharyngeal pumps expand cyclically at a …
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Behavior-Genetic Analysis of the Black Blow Fly, Phormia Regina, Using the Central Excitatory State (Ces)
… (CES) has identified two more components of the proboscis-extension response. Now four are known: Conditioning and sucrose-induced CES (s-CES) were described in previous studies, and here evidence is presented for the existence of water-induced CES (w-CES) and base-level water responsiveness. …
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Conditioning and retention, as studied in a behavior-genetic analysis of the blowfly Phormia regina: A search for relationships between learning and memory
Using proboscis extension (unconditioned response) to sucrose (unconditioned stimulus), individual blowflies (Phormia regina) were classically conditioned to saline (conditioned stimulus). Directional and stabilizing selection for retention and conditioning, respectively, have bred two strains of …
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The functional morphology of Axiothella rubrocinta (Johnson)
… the peristomium and has an extrusible sacciform proboscis. The pygidium may be plate-shaped, funnel shaped with an internal cone, or simply cone-shaped. All maldanids inhabit tubes of sand or mud, and subject to the limitations and advantages of this habjtat.</p>
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The Behavior-Genetic Analysis of Drosophila Melanogaster Using The Central Excitatory State
… characterized by an increased probability of proboscis extension to a water stimulus following sucrose stimulation, has been the focus of a behavior-genetic analysis of the fruit fly, Drosophila melanogaster. The interest CES has received is due to the positive correlation it has with …
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Multi-Modal Effects of the Repellent Deet Across Protostomia
… can sense DEET with their tarsi as well as their proboscis. The tarsi are required for mosquitoes to be repelled after contact with a DEET-treated arm. The proboscis is required for the rejection of DEET-laced liquid food. These results suggest that DEET acts on multiple sensory modalities to …
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Certain syndrome or complex conundrum? : the pollination of Erica lanuginosa
… by a robust insect with a medium length proboscis is considered unlikely due to phenology and morphology of the flower. Omothiphily is a possibility as stem thickness correlates with previous studies investigating the correlation between stem thickness and pollination syndromes. The …
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Conditioned Discrimination in the Behavior-Genetic Analysis of the Blow Fly, Phormia Regina
… that an aspect of its feeding behavior, the proboscis extension reflex (PER), can be modified by both associative ("learned") and non-associative factors such as the central excitatory state (CES). Data are presented indicating that a procedure previously used to demonstrate classical …
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Evaluation of the Functional Roles of TRPA1 Homologs, Painless and dTRPA1, in Chemical Nociception in Drosophila
… and <italic>dTRPA1</italic> mutants using the proboscis extension reflex (PER) and two-choice capillary feeding assays, both of which indicated the requirement for each channel in the aversion to AITC. Expression patterns of these two channels were evaluated to determine if there was any …
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Exploring winner effects in queens of the western honey bee
… led to observation of novel behaviors including proboscis pairing between opponents. Finally, this study provides novel insight into the behavioral displays (antagonistic and non-antagonistic) produced by virgin queens whose outcomes determine the genetic composition of their entire colony.
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Two Odorant-Binding Protein Genes in Mosquitoes: Comparative Genomics, Expression, and Function
… significantly reduced in the maxillary palp and proboscis, referred to as secondary olfactory organs of mosquitoes. These findings collectively indicate that Obp1 and Obp7 genes in An. stephensi likely function in female olfactory response and may be involved in behaviors related to …
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GENETIC DISSECTION OF AVERSION TO ALLYL ISOTHIOCYANATE IN Drosophila melanogaster
… double mutant using four behavioral assays: the proboscis extension reflex (PER), two-choice capillary feeding assay (CAFE), oviposition assay, and the locomotion assay. Results from studies using these assays all demonstrated the necessity of both receptors in the behavioral aversion to AITC. …
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A NOVEL ROLE FOR CYTOCHROME P450 G 35 (CYP4G35) IN ODOR PROCESSING IN AEDES AEGYPTI MOSQUITOES
… in mosquitoes: antennae, maxillary palps, and proboscis. These appendages have sensilla hairs covering their exterior structure. The sensilla hair houses many chemoreceptors, including odorant, ionotropic, and gustatory receptors. The volatile odorants enter the sensilla lymph through pores to …
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Olfactory learning, its development and changing role in Honeybee (Apis Mellifera) behaviour
… odours, paired with a sucrose reward, using the proboscis extension reflex (PER) learning paradigm. This thesis aims to establish any differences in the behavioural parameters of this olfactory learning. A strong, repeatable methodology is developed, and this specificity of the learning, tested …
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Neural processing of chemosensory information from the locust legs
… of the tarsi of Phormia regina led to proboscis extension, which was necessary to allow subsequent stimulation of additional chemoreceptors on the labellum and oral papillae, which finally led to drinking. This work was conducted in order to investigate the reflex of the pro and …
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Brain-behavioural olfactory asymmetries in Apoidea
… recall tests, conditioning bees to extend their proboscis (in the so-called PER paradigm) in association with those odours that more strongly activated functional responses in the selected glomerular subset. The behavioural tests showed an odour dependency in the capacity of bees to recall …
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