Global ETD Search
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Showing 1 to 13 of 13 for “"Bombus impatiens"”.
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Foraging in a Complex World: From Individual Flight Performance to Collective Behavior in Bumblebees (Bombus Impatiens)
Foraging is a crucial and remarkably complex behavior that is key to survival. For social insects such as bumblebees, successful foraging depends on a combination of individual traits (e.g. physiological and biomechanical performance of individual workers) and collective behavioral strategies for …
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Developmental timing of pupation and analysis of color pattern response to thermal stress in Bombus impatiens (Hymenoptera: Apidae)
… a species that is monomorphic in color pattern, Bombus impatiens, and demonstrated that individuals are able to withstand a wide range of temperatures and retain their characteristic adult color pattern. In performing this experiment, I found that the developmental staging of bumble bee pupation …
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The effects of structured variation in nectar standing crop on currency choice and optimal foraging by bumble bees
… among-plant variation. Captive bumble bees (Bombus impatiens) confronted with an increasing component of among-inflorescence nectar variation departed inflorescences in manners that diverged increasingly from expectations of the Marginal Value Theorem (MVT). Bees apparently assess …
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Landscape effects on bumble bee (Hymenoptera: Apidae) colony performance and fitness in New York State
… performance of the common eastern bumble bee, Bombus impatiens (Cresson), in four common landscapes (natural, suburban, conventional agriculture, and organic agriculture). In the summers of 2016 and 2017, 64 commercial bumble bee colonies were deployed across 16 sites (4 in each landscape) and …
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Plant-pollinator relationships of culturally significant food and medicine plants in the Great Lakes Region
… squash) garden. The common eastern bumble bee (Bombus impatiens) and hoary squash bee (Xenoglossa pruinosa) were important pollinators in this system. A breeding experiment including diurnal and nocturnal video recording was conducted to determine the most frequent visitors of sacred Tobacco …
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The Effects of Temporal Cold Exposure and Caste Differences on Gene Expression and Epigenetics of Common Bumble Bee Species
… expression changes in a common eastern species, Bombus impatiens. Findings suggest that differential gene expression of thoracic muscles peaked 10 minutes after chill coma recovery and was primarily characterized by metabolic shifts favoring the production and use of glucose for energy. Gene …
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Multi-faceted analyses of plant-pollinator interactions: From ecological communities to individual foraging decisions
… a flower was freely visited by P. fuscatus and Bombus impatiens. Lastly, I used a matched field and individual-based model to determine how bees use past experiences to alter foraging behavior. I found the foraging behavior of the bumble bee B. impatiens consistently lagged behind shifts in …
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Exploring the evolution of social behaviour using genomic data
… whole genome sequence data for two of the bees, Bombus impatiens and Megachile rotundata using Illumina sequencing technology. The reads generated were assembled using a de Bruijn graph based assembly algorithm into scaffolds having a N50 of 1.12 Mb and 31 Kb respectively.
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An Assessment of Non-Apis Bees as Fruit and Vegetable Crop Pollinators in Southwest Virginia
… and non-Apis bees in the genera Andrena, Bombus, and Osmia were as constant as honey bees when foraging on apple. Non-Apis, primarily native, bees made up between 68% (in caneberries) and 83% (in cucurbits) of bees observed visiting crop flowers. While 37–59 species visited crop flowers, …
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The Characterisation Of Bee Nicotinic Acetylcholine Receptors
… between three species of bees (Apis mellifera, Bombus terrestris and Bombus impatiens) causes a significant change in the efficacious properties of clothianidin, without effecting the pharmacology of the endogenous agonist acetylcholine. In addition species-specific variation in the α1 subunits …
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Unraveling The Genetic Mechanisms Involved In The Evolution And Development Of The Thoracic Appendages In Insects
… in the same region in another bee species, Bombus impatiens. These results indicate that this gene likely has a conserved role in the formation of the pollen basket, a unique structure common to all social bees. Therefore, Ubx may not only responsible for the enlargement, but also for the …
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THERE IS NO PLANET B(EE): AN INTEGRATED APPROACH TO UNDERSTANDING DRIVERS OF POTENTIAL DECLINES IN BUMBLEBEE COMMUNITIES
… ecosystems. Bumblebees (Hymenoptera: Apidae: Bombus) represent important agricultural and urban pollinator species as they are tolerant of the high disturbance rates that characterize agricultural and urban systems. Over the past four decades, declines in the range, diversity, and biomass of …
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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
This PhD thesis investigates the interplay between bimodal signal integration, multisensory processing, and the role of biogenic amines in learning and memory tasks of honey bees and bumble bees. The three chapters provide valuable insights into these interconnected concepts and on the mechanisms …