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17 results for “bee health”
Data for: Consequences of microsporidian prior exposure for virus infection outcomes and bumble bee host health
<p>Host-parasite interactions do not occur in a vacuum but in connected multi-parasite networks. Resulting co-exposures and coinfections during an individual host's lifetime can affect host health and infectious disease ecology, including disease outbreaks. However, many host-parasite studies examine pairwise interactions, meaning we still lack a general understanding of the influence of co-exposures and coinfections. Using the bumble bee <em>Bombus</em> <em>impatiens</em>, we study the effects of larval exposure to a microsporidian, <em>Nosema</em> <em>bombi</em>, implicated in bumble bee declines, and adult exposure to Israeli Acute Paralysis Virus (IAPV), an emerging infectious disease from honey bee parasite spillover. We hypothesize that infection outcomes will be modified by co-exposure or coinfection depending on relevant temporal interactions, due to changes in host immune allocation or condition. <em>Nosema</em> <em>bombi</em> is a potentially severe, larval-infecting parasite, and we predict that prior exposure will result in decreased host resistance to adult IAPV infection. We predict a double exposure will also reduce host tolerance, as measured by host survival. Although our larval <em>Nosema</em> exposure mostly did not result in viable infections, it reduced resistance to adult IAPV infection. Exposure to <em>Nosema</em> also negatively affected survival, potentially due to a cost of immunity in resisting the exposure. There was also a significant negative effect of IAPV exposure on survivorship, but in contrast to resistance, prior <em>Nosema</em> exposure did not alter this survival outcome. These results again demonstrate that infection outcomes within multi-parasite host networks can be non-independent, even when exposure to one parasite does not result in a substantial infection. </p>
Data for: Consequences of microsporidian prior exposure for virus infection outcomes and bumble bee host health
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Survey questionnaire and data of health management strategies of resilient honey bee stock throughout Southern California
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Data from: Innovative airborne DNA approach for monitoring honey bee foraging and health
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Interaction of field realistic doses of clothianidin and Varroa destructor parasitism on adult honey bee (Apis mellifera L.) health and neural gene expression, and antagonistic effects on differentially expressed genes
<p>While many studies have examined the effects of neonicotinoid insecticides and the parasitic mite <em>Varroa destructor</em> on honey bees (<em>Apis mellifera</em>), more information on the combined effects of such stressors on gene expression, including neural related genes, and their impact on biological pathways is needed. This study analyzed the effects of field realistic concentrations of the neonicotinoid clothianidin on adult bees infested and not infested with <em>V</em>. <em>destructor</em> over 21 consecutive days and then determined bee survivorship, weight, deformed wing virus (DWV) levels and gene expression. <em>V</em>. <em>destructor</em> parasitism with or without clothianidin exposure was significantly associated with decreased survivorship, weight loss and higher DWV levels, while clothianidin exposure was only associated with higher levels of DWV. Expression analysis of the neural genes <em>AmNlg-1</em>, <em>BlCh</em> and <em>AmAChE-2</em> showed that <em>V</em>. <em>destructor</em> caused a significant down-regulation of all of them, whereas clothianidin caused a significant down-regulation of only <em>AmNrx-1</em> and <em>BlCh</em>. An interaction was only detected for <em>AmNrx-1</em> expression. RNAseq analysis showed that clothianidin exposure resulted in 6.5 times more up-regulated differentially expressed genes (DEGs) than <em>V</em>. <em>destructor</em> alone and 123 times more than clothianidin combined with <em>V</em>. <em>destructor</em>. Similar results were obtained with down-regulated DEGs, except for a higher number of DEGs shared between <em>V</em>. <em>destructor</em> and the combined stressors. KEGG (Kyoto Encyclopedia of Genes and Genomes) biological pathway analysis of the DEGs showed that the stressor linked to the highest number of KEGG pathways was clothianidin, followed by <em>V</em>. <em>destructor</em>, and then considerably fewer number of KEGG pathways with the combined stressors. The reduced numbers of DEGs and KEGG pathways associated with the DEGs for the combined stressors compared to the stressors alone indicates that the interaction of the stressors is not additive or synergistic, but antagonistic. The possible implications of the antagonistic effect on the number of DEGs are discussed.</p>
Data from: Interacting stressors matter: diet quality and virus infection in honey bee health
Honey bee population declines have been linked to multiple stressors, including reduced diet diversity and increased exposure to understudied viral pathogens. Despite interest in these factors, few experimental studies explored the interaction between diet diversity and viral infection in honey bees. Here, we used a mixture of laboratory cage and small semi-field nucleus hive experiments to determine how these factors interact. We found that high quality diets (polyfloral pollen and high quality single-source pollen) have the potential to reduce mortality in the face of infection with Israeli acute paralysis virus (IAPV).). There was a significant interaction between diet and virus infection on mortality, even in the presence of high virus titers, suggesting that good diets can help bees tolerate virus infection. Further, we found that extreme stress in the form of pollen starvation in conjunction with IAPV infection increase exiting behavior from small experimental hives. Finally, we showed that higher quality pollen diets have significantly higher iron and calcium content, suggesting micronutrient deficiencies could be an under explored area of bee nutrition.
Data from: Chronic exposure to neonicotinoids reduces honey bee health near corn crops
Experiments linking neonicotinoids and declining bee health have been criticized for not simulating realistic exposure. Here we quantified the duration and magnitude of neonicotinoid exposure in Canada's corn-growing regions and used these data to design realistic experiments to investigate the effect of such insecticides on honey bees. Colonies near corn were naturally exposed to neonicotinoids for up to 4 months—the majority of the honey bee's active season. Realistic experiments showed that neonicotinoids increased worker mortality and were associated with declines in social immunity and increased queenlessness over time. We also discovered that the acute toxicity of neonicotinoids to honey bees doubles in the presence of a commonly encountered fungicide. Our work demonstrates that field-realistic exposure to neonicotinoids can reduce honey bee health in corn-growing regions.
Interaction of field realistic doses of clothianidin and Varroa destructor parasitism on adult honey bee (Apis mellifera L.) health and neural gene expression, and antagonistic effects on differentially expressed genes
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Data from: Chronic exposure to neonicotinoids reduces honey bee health near corn crops
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Data from: Interacting stressors matter: diet quality and virus infection in honey bee health
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The direct and indirect effects of environmental toxicants on the health of bumble bees and their microbiomes
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Nutrigenomics in honey bees: the impact of pollen nutrients on bee health
GEO Series GSE25161. Apis mellifera. 4 samples. Type: Expression profiling by high throughput sequencing.
Mediating a host cell signaling pathway linked to the overwinter mortality offers a promising therapeutic approach for improving bee health
GEO Series GSE196998. Apis mellifera. 6 samples. Type: Expression profiling by high throughput sequencing.
Data from: A large-scale field study examining effects of exposure to clothianidin seed-treated canola on honey bee colony health, development, and overwintering success
In summer 2012, we initiated a large-scale field experiment in southern Ontario, Canada, to determine whether exposure to clothianidin seed-treated canola (oil seed rape) has any adverse impacts on honey bees. Colonies were placed in clothianidin seed-treated or control canola fields during bloom, and thereafter were moved to an apiary with no surrounding crops grown from seeds treated with neonicotinoids. Colony weight gain, honey production, pest incidence, bee mortality, number of adults, and amount of sealed brood were assessed in each colony throughout summer and autumn. Samples of honey, beeswax, pollen, and nectar were regularly collected, and samples were analyzed for clothianidin residues. Several of these endpoints were also measured in spring 2013. Overall, colonies were vigorous during and after the exposure period, and we found no effects of exposure to clothianidin seed-treated canola on any endpoint measures. Bees foraged heavily on the test fields during peak bloom and residue analysis indicated that honey bees were exposed to low levels (0.5–2 ppb) of clothianidin in pollen. Low levels of clothianidin were detected in a few pollen samples collected toward the end of the bloom from control hives, illustrating the difficulty of conducting a perfectly controlled field study with free-ranging honey bees in agricultural landscapes. Overwintering success did not differ significantly between treatment and control hives, and was similar to overwintering colony loss rates reported for the winter of 2012–2013 for beekeepers in Ontario and Canada. Our results suggest that exposure to canola grown from seed treated with clothianidin poses low risk to honey bees.
An Investigation of the Effects of a Royal Jelly and Bee Venom-Derived Skin Serum on Skin Health and Signs of Aging
ClinicalTrials.gov study NCT06148753. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
An Investigation of the Effects of a Royal Jelly and Bee Venom-Derived Skin Cream on Skin Health and Signs of Aging
ClinicalTrials.gov study NCT06148766. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Data from: A large-scale field study examining effects of exposure to clothianidin seed-treated canola on honey bee colony health, development, and overwintering success
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.