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Showing 1 to 20 of 58 for “"bombus"”.
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Mathematical quantification and statistical analysis of bombus (hymenoptera:apidae) dorsal color patterns
… Chauliognathus beetles and bees. In bumble bees (Bombus), Müllerian mimicry has been hypothesized to occur in the form of color pattern complexes composed of often distantly related species. Understanding how these color patterns are developmentally and genetically regulated would contribute to an …
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Colony Life History in the Bumble Bee Bombus terrestris: Interactions, Timing and Control.
… I use laboratory experiments with the bumble bee Bombus terrestris to investigate the control of eusocial insect colony life history, with a focus on the interactions that bring about control over timing. Specifically, I reveal queen control over the onset of male production; show that colonies do …
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PATTERNS OF AMERICAN BUMBLE BEE (BOMBUS PENSYLVANICUS) ABUNDANCE ACROSS RESTORED HABITATS IN EAST TEXAS ECOSYSTEMS
<p>Many bumble bee species (<em>Bombus</em> spp.), are declining, yet drivers of their abundance remain partially understood. In the southeastern United States, historically open habitats have shifted towards closed-canopy conditions via fire suppression, deforestation and afforestation, altering …
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Bumble Bees (Apidae: Bombus) Through the Ages: Historical Biogeography and the Evolution of Color Diversity
… chapter, I add the rare obligate social parasite Bombus inexspectatus to the phylogeny to assess the evolution of social parasitism. B. inexspectatus is not the sister taxon to its host B. ruderarius, but a close relative, and therefore adheres to the loose version of Emery's rule.
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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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The role of small RNAs in caste determination and differentiation in the bumble bee, Bombus terrestris
… and differentiation in the bumble bee Bombus terrestris. In Chapter 2, I used deep sequencing (miRNA-seq) and bioinformatics to annotate miRNAs in B. terrestris and a second Bombus species, B. impatiens. I found that B. terrestris yielded 131 miRNAs and B. impatiens yielded 114 miRNAs …
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Phylogeny and color pattern evolution in a New World bumble bee (Hymenoptera: Apidae: Bombus: Pyrobombus) species complex
Bombus ephippiatus is one of the most common and widespread bumble bee species throughout Mexico and Central America. This robust and charismatic species possesses a highly variable color pattern throughout its wide distribution across montane and lowland regions, which raises the question of …
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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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A proteomic and cytological characterisation of the buff-tailed bumblebee (Bombus terrestris) fat body and haemolymph -An immune perspective
… that provide essential ecosystem services. Bombus terrestris (Linnaeus) is a widespread and important bumblebee pollinator of wild and cultivated crops and although found commonly across Europe, is available commercially to supplement pollination requirements. Due to their activity, B. …
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The pollination biology of Haskap (Lonicera caerulea L.: Caprifoliaceae): floral traits and pollinator performance of a new Saskatchewan fruit crop.
… Apis mellifera and Osmia lignaria, and wild Bombus spp. I found that Bombus queens had the highest levels of single visit pollen deposition (SVD), the highest visitation rate, and were observed to be active even during cooler temperatures experienced during Haskap flowering. Apis mellifera …
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Competitive Effects of Honey Bee (Apis melifera) Hives on Morphology and Morphology-Based Abundance of Bumble Bees (Apidae: Bombus) in an Urban Prairie Landscape (City of Red Deer, Alberta)
… honey bees (Apis melifera) on bumble bee (Bombus) populations in the City of Red Deer, with an intent to aid wild bee conservation in the area as well as decision-making regarding possible legislation of honey bee keeping within the city. A growing body of research has documented the …
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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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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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Population ecology and parasitism in bumble bees (Hymenoptera: apidae)
The development of three colonies of Bombus fervidus (Fabricius) and two of Bombus pennsylvanicus (Degeer) was studied. Population levels and the production of males and young queens varied among colonies and between years. Mean longevity of worker bees decreased significantly toward the end of the …
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Genomic studies of social evolution in bees
… in maternal traits in queens of the bumble bee Bombus terrestris are regulated by workers during the nest initiation phase of the Bombus life cycle. Here, I provide evidence that workers socially regulate both brood-feeding and egg-laying behavior in queens, and may also influence patterns of …
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Hiding in plain sight: unveiling cryptic diversity and patterns in bumble bees
… One I explore the population genetics of the Bombus ephippiatus-Bombus wilmattae species group. The color pattern diversity within this group across a variety of habitats in Mexico and Central America has brought their taxonomic status into question for over 150 years. To resolve the uncertain …
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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 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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