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 332 for “"Bees"”.
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HONEY BEES, BIODIVERSITY AND CLIMATE CHANGE
Honey bees (Apis mellifera) are vital pollinators for both natural ecosystems and agricultural productivity. However, their populations are threatened by factors such as habitat loss, pathogens, climate change, and the genetic risks associated with selective breeding. This thesis explores the …
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Engineering the gut microbiome of honey bees
Honey bees are critically important commercial pollinators and model systems for insect physiology and behavior. Honey bees are also suffering dramatic declines worldwide due to many factors, including agricultural practices, parasites, and pesticide use. These bees house a simple, conserved gut …
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Mechanisms involved in eusocial evolution in bees
… processes through which sociality arises. Bees are a valuable group for studying social evolution because the common ancestor of all bees was solitary and the most extreme form of group living, eusociality, has evolved multiple independent times within the bees. Recent advances in genome …
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Genomic studies of social evolution in bees
The eusocial insects (ants, termites, and some bees and wasps) are paragons of social complexity, with their highly organized societies comprised of primarily sterile workers, headed by one or a few reproductives. Despite a rich body of theoretical, empirical, and natural history research on social …
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A Hive Mind: Bounded Rationality and Bees
Bees (Anthophila) are experiencing global decline as part of what is being called the Anthropocene extinction. In addition to the drivers of this event, such as climate change, bees are experiencing synergistic challenges from pesticides, poor nutrition, pathogens, and parasites. Bees play a …
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Molecular bases of scouting behavior in honey bees
… or nest sites independently and recruit other bees in the hive to the locations of good food or nest sites instead of exploiting the resources themselves. In this dissertation, I hypothesize that scouting behavior in honey bees is analogous to novelty- seeking behavior in vertebrates, and is …
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Genomic regulation of social behavior in eusocial bees
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Bionomy and host plant finding in oil collecting bees
… between oil offering flowers and oil collecting bees is one of the most specialised mutualistic interactions between insects and their host plants. It occurs in four floristic regions with about 1800 plant species and 400 bee species involved. The bees collect the fatty oils to provide their …
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Foraging Behavior of Spring Bees and Their Agricultural Implications
… honey bee populations in the last decade. Native bees have been largely neglected in research, and their floral preferences may have agricultural implications because native bees ameliorate the demand to rely solely on non-native bees. In this work, pollinator visitation to flowers with …
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Native Bees and Pollen Collection: How Flexible Are They?
… reproduction of crops and wild plants. Native bees may be a free source of pollination services and act as ‘insurance’ against potential honey bee losses in Australia. This study aims is to determine whether native bees collect pollen mainly from native plants, with which they have a shared …
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Native Bees and Pollen Collection: How Flexible Are They?
… reproduction of crops and wild plants. Native bees may be a free source of pollination services and act as ‘insurance’ against potential honey bee losses in Australia. This study aims is to determine whether native bees collect pollen mainly from native plants, with which they have a shared …
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The Effects of Allatecomy on Flight in Honey Bees
Bees were assayed in the lab for flight and metabolic capacity. The CA- group had significantly fewer flightworthy bees and significantly lower metabolic capacity than control groups. MCA- bees were intermediate and not significantly different than the CA- or control groups. These results are …
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Genetic Variation and Differentiation in Honey Bees (Apis) (Electrophoresis)
The natural distribution of the genus Apis is limited to Europe, Africa and Asia. Therefore, New World populations of A. mellifera, the familiar honey bee of commerce, are descended from importations that began with early European colonization in the Americas. In the Old World, at least two dozen …
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Population ecology and parasitism in bumble bees (Hymenoptera: apidae)
… and between years. Mean longevity of worker bees decreased significantly toward the end of the season. Mean size of emerging worker bees increased significantly with time. The decreased survivorship may be related to the seasonal size increase of the workers, which would result in an …
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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
… 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 underlying bee’s behaviour. The first chapter focuses on the dependency of intensity, for the integration of bimodal signals …
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Patterns of Resource Utilization by Spring Bees Visiting Salix With Emphasis on Use of Pollen by Bees in the Genus Andrena (Hymenoptera: Apoidea) (Competition, Resource Partitioning)
Made available in DSpace on 2014-12-16T05:57:04Z (GMT). No. of bitstreams: 1 8511645.pdf: 6457485 bytes, checksum: 19a929f537af2cef7833289a3aa4bd26 (MD5) Previous issue date: 1985
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Potential for probiotics to mitigate environmental stress in Western honey bees
The use of probiotics, particularly strains of lactobacilli, presents a promising strategy for addressing key threats to Apis mellifera, such as Varroa mites and Paenibacillus larvae. Lactobacilli are part of the honey bee hindgut microbiota, and some probiotic strains have been shown to enhance …
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