Global ETD Search
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Showing 1 to 20 of 33 for “"octopamine"”.
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Ocelli and octopamine and their effects on cabbage looper moth flight activity
The roles of ocelli and octopamine in regulating the onset, intensity, and duration of cabbage looper moth flight activity were examined. This was achieved by studying the flight activity of control, sham, and anocellate moths with and without octopamine treatment. Sham and anocellate moths were …
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Effects of imidacloprid and octopamine on the honey bee (Apis mellifera) trophallaxis social network
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms
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The Role of Octopamine in the Regulation of Division of Labor in Honey Bee Colonies
Finally, in Chapter 4 I investigated how octopamine in antennal lobes may be regulated. Because juvenile hormone acts over developmental time scales to affect foraging while octopamine acts over short-term scales, I investigated whether octopamine is downstream of juvenile hormone in the regulation …
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Influence of flight activity and octopamine on hemolymph trehalose titers in Heliothis zea (Boddie) (Lepidoptera: Noctuidae)
… day and related to flight activity. Effects of octopamine injection or stress on trehalose levels were also quantified. Flight activity was measured with a 32-channel computerized actograph that simulated sunrise at 0300 EST (Eastern Standard Time) and sunset at 1700. Males exhibited greater …
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Biogenic Amines and Division of Labor in the Honey Bee Society
… of biogenic amines, dopamine, serotonin, and octopamine, were measured in relation to both age-related division of labor and differences in task specialization, independent of age, in honey bee colonies. There were distinct differences associated with age-related division of labor. Older bees, …
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Neurochemical Levels Correlate with Population Level Differences in Social Structure and Individual Behavior in the Polyphenic Spider, <em>Anelosimus studiosus</em>.
… implications for the evolution of sociality. Octopamine is a neurotransmitter that has been found to elevate aggression in invertebrates. Serotonin has been shown, in some cases, to interact antagonistically with octopamine. We used High Pressure Liquid Chromatography with Electrochemical …
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Molecular bases of scouting behavior in honey bees
… with differences in brain dopaminergic, octopaminergic and glutamatergic systems. I found significant brain down- regulation of the D1-type dopamine receptor genes and upregulation of the octopamine receptor genes in scouts compared to non-scouts. Microarray analysis confirmed these …
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Cellular signalling pathways involved in thermoprotection of neural ciruit function in the locust.
… stress was removed. I investigated the octopaminergic (OA/cAMP/PKA) and nitrergic (NO/cGMP/PKG) signalling pathways and tested their involvement in conferring thermotolerance to the vCPG during heat stress. I found that long applications of octopamine, or increased adenylate cyclase …
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The role of intensity, temporal synchrony, and biogenic amines for unimodal and multimodal integration during learning and memory of honey bees and bumble bees
… bumble bees expanding our understanding of how octopamine (OA) and dopamine (DA) work in tandem to modulate appetitive learning and memory. My results suggest that the influence of octopamine (OA) and dopamine (DA) administration on learning and memory processes is concentration-dependent and …
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Localizing engrams of olfactory memories in Drosophila
… memories, dopamine in case of electric shock and octopamine in case of sugar memory, respectively. Taking the representation of the olfactory cue within the mushroom bodies into account, the data suggest that the two memory traces are located in the same Kenyon cells, but in separate subcellular …
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Functional characterisation of aphid, Myzus persicae, nicotinic acetylcholine receptors and identification of a novel biogenic amine-gated ion channel from the honeybee, Apis mellifera
… 3.37 μM), 5-hydroxytryptamine (EC50 122 μM), octopamine (EC50 378 μM), tyramine (EC50 91.1 μM) and histamine (EC50 3.36 mM) but not to GABA, glycine or glutamate. Dopamine, 5-hydroxytryptamine, octopamine and tyramine all acted as superagonists relative to acetylcholine and had higher …
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Biogenic Amine Levels Correlate with Time of Day, Age, Light Cycle, and Aggressive State in the Flesh Fly, Sarcophaga crassipalpis
… amines serotonin (5HT), dopamine (DA), and octopamine (OA) have been indicated in the regulation of behaviors, including aggression. The flesh fly, <em>Sarcophaga crassipalpis</em>, was used to investigate ontogenetic and circadian changes in amines and aggression. Heads of male flies were …
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INFLUENCE OF BIOGENIC AMINES ON BOVINE LUTEAL STEROIDOGENESIS
… The alternative pathway catecholamines octopamine, synephrine and deoxyepinephrine enhanced basal progesterone production, and this response was mediated by $\beta$-adrenergic receptors. Analysis of luteal tissue using high performance liquid chromatography showed nondetectable levels of …
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Neuronal Regulation of the Innate Immune Response in Caenorhabditis elegans
… infection. Previous studies showed that an octopamine receptor, OCTR-1, functions in chemosensory neurons to inhibit innate immunity. We found that OCTR-1-expressing neurons, ASH, and interneurons, AIA, are involved in controlling the resistance to pathogen infection. This work provides …
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C. elegans integrates food, stress, and hunger signals to coordinate motor activity
… locomotion and found that serotonin, dopamine, octopamine, and tyramine regulate the actions of one another. We also found that dopamine is required to set and maintain a precise rate of locomotion by C. elegans.
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Expression of tyramine β – hydroxylase and tyrosine hydroxylase genes in response to odor valence in the brain of the honey bee, Apis mellifera
… and aversion. Invertebrate research suggests octopamine (OA) signaling mediates the positive reinforcement of food rewards (Hammer 1993, 1997; Menzel and Muller 1996; Schwärzel et al., 2003) and dopamine (DA) modulates aversive learning (Schwärzel et al. 2003; Reimensperger et al., 2005; …
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The structure and function of Gene's organ and its associated glands in ticks
… of a range of drugs on oviposition was tested; octopamine and certain adrenergic agonists were found to stop oviposition in engorged females in a similar manner to sublethal doses of formamidine acaricides. Tick muscle has received few previous investigations, so the present study also concerns …
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A TALE OF TWO NEUREXINS: NRX-1 AND NLR-1 FACILITATE FUNCTION OF MONOAMINE CIRCUITS AND FORAGING BEHAVIORS
… responses to food deprivation in part via octopamine signaling. Meanwhile the long α-isoform controls the maintenance response to food deprivation with an epistatic genetic interaction with nlg-1/neuroligin, a canonical binding partner of neurexins. I also find that nlr-1 controls responses …
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Cell-selective modulation of the neuromuscular system in Drosophila
… Using three different modulatory substances, i) octopamine - a biogenic amine released from motor neuron terminals, ii) DPKQDFMRFa - a neuropeptide secreted into circulation, and iii) Proctolin - a pentapeptide released both from motor neuron terminals and into circulation, I was able to …
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Physiological bases of parental care in the burying beetles, Nicrophorus orbicollis
… gonadotropin. Chapter V explores the role of octopamine, dopamine and serotonin during brood care by combining direct treatments and individual measurements of amine brain levels. Preliminary findings suggest that studies of neuromodulation by biogenic amines could be an important tool to …
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