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  • Modeling Honey Bee Populations - Home - PLOS

    2015-7-6 · Eusocial honey bee populations (Apis mellifera) employ an age stratification organization of egg, larvae, pupae, hive bees and foraging bees. Understanding the recent decline in honey bee colonies hinges on understanding the factors that impact each of these different age castes. We first perform an analysis of steady state bee populations given mortality rates within each bee caste and find ...

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  • Modeling Honey Bee Populations - Home - PLOS

    2015-7-6 · Daily consumption rates of bee class in grams d i Larvae deaths per day D Food deficit quantity E Number of eggs E 0 Daily egg laying rate of queen bee f Food reserves in the colony (grams) f d Daily food requirement of colony (grams) f a, f i Available food (grams), Inaccessible food (grams) f L, f …

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  • (PDF) Modeling Honey Bee Populations

    2013-5-7 · Honey bees (Apis mellifera) are increasingly in demand as pollinators for various key agricultural food crops, but globally honey bee populations are in decline, and honey bee colony failure rates have increased. This scenario highlights a need to understand the conditions in which colonies flourish and in which colonies fail. To aid this investigation we present a compartment model of bee ...

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  • Modelling Food and Population Dynamics in Honey

    2014-10-16 · Introduction. The widespread collapse of honey bee colonies has been the subject of much discussion and research in recent years –.Aside from their ecological importance , honey bee populations have a large economical impact on agriculture in North America, Europe, the Middle East, and Japan –.. The focus of research has been largely on environmental factors outside the hive, such as ...

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  • Effects of Infection on Honey Bee Population ... -

    2011-4-18 · Since 2006 the rate of honey bee colony failure has increased significantly. As an aid to testing hypotheses for the causes of colony failure we have developed a compartment model of honey bee colony population dynamics to explore the impact of different death rates of forager bees on colony growth and development. The model predicts a critical threshold forager death rate beneath which ...

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  • A Quantitative Model of Honey Bee Colony ... - Home

    2015-7-1 · adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

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  • Modeling Honey Bee Populations - NASA/ADS

    Honey bee ( Apis mellifera) exposomes and dysregulated metabolic pathways associated with Nosema ceranae infection. Robert L. Broadrup, Christopher Mayack, [ ... ], Anthony Macherone.

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  • PLOS ONE: Honey bees - Home - PLOS

    2021-4-27 · PLOS publishes a suite of influential Open Access journals across all areas of science and medicine. Rigorously reported, peer reviewed and immediately available without restrictions, promoting the widest readership and impact possible.

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  • Home - PLOS

    2019-9-26 · Worldwide, the ecto-parasitic mite Varroa destructor has been assigned as an important driver of honey bee (Apis mellifera) colony losses. Unlike the subspecies of European origin, the honey bees in some African countries such as Uganda and Ethiopia may not be as threatened or suffer less from mite-infestations. However, only little is known about the factors or traits that enable them to co ...

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  • Honey bee survival mechanisms against the parasite

    2020-6-1 · In addition to selective breeding, natural selection has yielded honey bee populations in Europe, North America, South America and Africa that survive varroa without parasite management (Locke, 2016; Fig. 1A).The underlying mechanisms are not all well understood, and seem to vary between different naturally selected populations despite experiencing similar selection pressures …

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  • Mite-surviving populations - Home - Springer

    2015-12-22 · The Varroa destructor mite is the largest threat to apiculture worldwide and has been responsible for devastating losses of wild honeybee populations in Europe and North America. However, Varroa mite-resistant populations of A. mellifera honeybees have been reported and documented around the world with a variety of explanations for their long-term survival with uncontrolled mite infestation.

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  • Utility rate equations of group population dynamics in ...

    2013-12-30 · As follows from the above analysis, there can exist societies with no defectors. A good example of this is a bee colony. A honey bee colony typically consists of three kinds of adult bees: workers, drones, and a queen . Several thousand worker bees cooperate in nest building, food collection, and brood rearing.

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  • Effects of decreases of animal pollinators on human ...

    2015-7-15 · Few studies have assessed the potential effect of pollinator decreases on health. One analysis in four low-income countries showed that human vulnerability to animal pollinator decreases from micronutrient deficiencies requires that the population receive significant nutritional value from pollinator-dependent crops and that the population be near a threshold of dietary intake at which ...

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  • (PDF) Threats to an ecosystem service: multifactorial ...

    nates explanations of honey bee decline in the developed Managed honey bees are thus chronically exposed to a cock- world. The Varroa destructor mite is the primary vector of tail of different chemicals that can subtly interact, some- many viruses (Picornavirales) implicated in honey bee times synergistically, with detrimental effects on bee ...

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  • Evaluating Spatiotemporal Resolution of Trace

    2020-6-12 · Honey, bee, and bee pollen results have similar TE and isotopic trends; samples collected in urban and industrialized areas exhibit elevated concentrations of anthropogenically influenced TE (e.g., Pb, Zn, V, and Ti) and a less radiogenic Pb isotopic composition (i.e., lower 206 Pb 207 Pb and elevated 208 Pb 206 Pb) relative to their suburban ...

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  • PeerJ

    2021-6-14 · Advisors and Academic Editors at PeerJ are experienced researchers who are experts in their respective fields. As a general rule, Academic Editors must be at Principal Investigator level or above and have published 25 or more peer-reviewed journal articles.

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  • Honey Bee Health - USDA Pages 1 - 50 - Flip PDF

    2015-7-6 · Check Pages 1 - 50 of Honey Bee Health - USDA in the flip PDF version. Honey Bee Health - USDA was published by on 2015-07-06. Find more similar flip PDFs like Honey Bee Health - USDA. Download Honey Bee Health - USDA PDF for free.

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  • Abrupt Change in Ecological Systems ... - Home: Cell

    Abrupt ecological changes are, by definition, those that occur over short periods of time relative to typical rates of change for a given ecosystem. The potential for such changes is growing due to anthropogenic pressures, which challenges the resilience of societies and ecosystems. Abrupt ecological changes are difficult to diagnose because they can arise from a variety of circumstances ...

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  • Conservation Genomics in a Changing ... - Home: Cell

    Although logistically challenging to study, the Arctic is a bellwether for global change and is becoming a model for questions pertinent to the persistence of biodiversity. Disruption of Arctic ecosystems is accelerating, with impacts ranging from mixing of biotic communities to individual behavioral responses. Understanding these changes is crucial for conservation and sustainable economic ...

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  • Frontiers - The Saskatraz Honey Bee Breeding Project

    2015-2-17 · The resulting colony superseded and a daughter was mated at the RP30 apiary again, resulting in two back crosses at the RP30 apiary. Extensive screening of Varroa present on adult bee populations in both breeding populations and commercial colonies identified G4, a susceptible colony phenotype established in the summer of 2009.

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  • Utility rate equations of group population dynamics in ...

    2013-12-30 · As follows from the above analysis, there can exist societies with no defectors. A good example of this is a bee colony. A honey bee colony typically consists of three kinds of adult bees: workers, drones, and a queen . Several thousand worker bees cooperate in nest building, food collection, and brood rearing.

    Get Price
  • Viruses | An Open Access Journal from MDPI

    2021-2-19 · Viruses is a peer-reviewed, open access journal of virology, published monthly online by MDPI.The American Society for Virology (ASV), the Spanish Society for Virology (SEV), the Canadian Society for Virology (CSV), the Italian Society for Virology (SIV-ISV), the Australasian Virology Society (AVS) and more societies are affiliated with Viruses and their members receive a discount on the ...

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  • PeerJ

    2021-6-14 · Advisors and Academic Editors at PeerJ are experienced researchers who are experts in their respective fields. As a general rule, Academic Editors must be at Principal Investigator level or above and have published 25 or more peer-reviewed journal articles.

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  • Monitoring of SARS‐CoV‐2 infection in mustelids - -

    As from December 2020, following the SARS-CoV-2 epidemics, the number of mink farms in Europe was around 700 farms, mostly located in Finland, Poland, Lithuania and Greece. In the EU, mustelids can be also kept as pets, mainly ferrets. Farmed mink are generally farmed in open housing systems and in contiguous cages.

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  • EconPapers: PLOS ONE

    2021-6-10 · Volume 11, issue 12, 2016 Migratory Connectivity at High Latitudes: Sabine’s Gulls (Xema sabini) from a Colony in the Canadian High Arctic Migrate to Different Oceans pp. 1-12 Shanti E Davis, Mark Maftei and Mark L Mallory Assessing Agreement between Radiomic Features Computed for Multiple CT Imaging Settings pp. 1-12 Lin Lu, Ross C Ehmke, Lawrence H Schwartz and Binsheng Zhao

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  • The Varroa Problem: Part 5- Striking a Deal with

    Contents selective breeding. 1 There’s no free lunch. 2 The good news. 2 What needs to change. 2 Striking a Deal with Varroa. 3 Other mechanisms and traits. 4 Progress can be fast. 5 knowing your enemy. 6 The strategy for subduing varroa. 6 The bees’ tactics. 7 Using models. 9 wrap up. 11 aknowledgements. […]

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  • Looks like 'global warming' is off the hook for

    2012-1-7 · Populations of honey bees and other pollinators have declined worldwide in recent years. A variety of stressors have been implicated as potential causes, including agricultural pesticides. Neonicotinoid insecticides, which are widely used and highly toxic to honey bees, have been found in previous analyses of honey bee pollen and comb material.

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  • (PDF) Vanbergen IPI FEE | Mark Greco - Academia.edu

    Multiple coinfections over time and space, interacting in complex, non-linear ways, are likely the root cause of pathogeninduced honey bee losses. Many pests and pathogens also spread within and between populations of wild and managed bee species, and perhaps other pollinating insects as well Cameron et al. 2011;Core et al. 2012).

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  • Hybridization and introgression between Helicoverpa ...

    2020-5-25 · Invasion of organisms into new ecosystems is increasingly common, due to the global trade in commodities. One of the most complex post-invasion scenarios occurs when an invasive species is related to a native pest, and even more so when they can hybridize and produce fertile progeny. The global pest Helicoverpa armigera was first detected in Brazil in 2013 and generated a wave of …

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  • Medscape | PLoS One - Publication Information

    2021-5-31 · A fluorescent plasmonic biochip assay for multiplex screening of diagnostic serum antibody targets in human Lyme disease. February 10, 2020. [ MEDLINE Abstract ] Temporal and …

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  • Beekeepers move ONE MILLION of the insects to

    2019-8-12 · Beekeepers in Girona, Spain have transferred almost one million Iberian black bees and their hives 1200 metres above sea level to protect the insects from increasing heat and pesticides.

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  • Diabrotica virgifera virgifera (western ... - Home -

    Modeling the spread of western corn rootworm (Coleoptera: Chrysomelidae) populations adapting to soybean-corn rotation. Environmental Entomology, 28(2):188-194; 17 ref. Onstad DW, Meinke LJ, 2010. Modeling evolution of Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae) to transgenic corn with two insecticidal traits.

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  • Urbanization Current Events | Page 2

    2015-8-25 · A new study of native bumblebee populations in southeastern Michigan cities found, surprisingly, that Detroit has more of the large-bodied bees than some surrounding, less urbanized locations. (2017-05-17) CO2 emissions in Russia go up in line with economic growth up …

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  • Multiscale modeling of nerve agent hydrolysis

    2014-10-1 · The theoretical description and modeling of complex processes is very challenging because there is no single theoretical or modeling approach that is suitable for examining the full range of length and time scales. If subatomic processes are excluded, then quantum mechanics (QM) is the appropriate physical theory to employ for atomic systems.

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  • Minimal Organizational Requirements for the

    2020-1-1 · Abstract. Recently, psychological phenomena have been expanded to new domains, crisscrossing boundaries of organizational levels, with the emergence of areas such as social personality and ecosystem learning. In this contribution, we analyze the ascription of an individual-based concept (personality) to the social level.

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  • Neural versus alternative integrative systems:

    2021-2-8 · Transmitter signalling is the universal chemical language of any nervous system, but little is known about its early evolution. Here, we summarize data about the distribution and functions of neurotransmitter systems in basal metazoans as well as outline hypotheses of their origins.

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  • Global Warming not to blame for toad extinction –

    2010-3-7 · The Monteverde golden toad disappeared from Costa Rica Pacific coastal forest in the late 1980s. Credit: U.S. Fish and Wildlife Service. Scientists broadly agree that global warming may threaten the survival of many plant and animal species; but global warming did not kill the Monteverde golden toad, an often cited example of climate-triggered extinction, says a new study.

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  • Heroin type, injecting behavior, and HIV transmission.

    Zhong L, Zhang Q, Li X. Modeling the intervention of HIV transmission across intertwined key populations. Sci Rep. 2018 Feb 5;8(1): 2432. doi: 10.1038/s41598-018-20864-6 29402964 47.

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  • Modulation of Non-Templated ... - Future Science |

    2018-8-2 · Spatio-temporal genetic structuring of brown trout (Salmo trutta L.) populations within the River Luga, northwest Russia 30 March 2008 | Conservation Genetics, Vol. 10, No. 2 Analyses of microbial consortia in the starter of Fen Liquor

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  • Non-Violent Techniques for Human-Wildlife Conflict

    For many centuries, humans and wildlife species have co-existed through domestication and protection of habitats. However, because of competition due to a perception of limited natural resources, the Human-Wildlife Conflict (‘HWC’) has become a serious global issue, including in Bhutan, posing a grave concern to the conservationist, agriculturist, public and policy makers worldwide.

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  • Medscape | PLoS One - Publication Information

    Table of Contents 2016 - 11 (5) Faunal Communities Are Invariant to Fragmentation in Experimental Seagrass Landscapes. May 31, 2016 [ MEDLINE Abstract] Crown …

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  • Diabrotica virgifera virgifera (western ... - Home -

    Modeling the spread of western corn rootworm (Coleoptera: Chrysomelidae) populations adapting to soybean-corn rotation. Environmental Entomology, 28(2):188-194; 17 ref. Onstad DW, Meinke LJ, 2010. Modeling evolution of Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae) to transgenic corn with two insecticidal traits.

    Get Price
  • Evolution of Insect Color Vision: From Spectral ...

    2021-3-6 · Color vision is widespread among insects but varies among species, depending on the spectral sensitivities and interplay of the participating photoreceptors. The spectral sensitivity of a photoreceptor is principally determined by the absorption spectrum of the expressed visual pigment, but it can be modified by various optical and electrophysiological factors. For example, screening and ...

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  • Comparing Asian Gypsy Moth [Lymantria dispar

    2020-2-11 · Abstract. Management of the European gypsy moth [Lymantria dispar dispar (Linnaeus)] in North America has benefited from more than a century of research.The East Asian strains of the gypsy moth, however, bring new challenges including multiple subspecies (Lymantria dispar asiatica Vnukovskij and Lymantria dispar japonica Motschulsky), broad distributions across heterogeneous habitats, and a ...

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  • International Union of Biological Sciences (IUBS)

    Therefore, in 2008, the International Society of Zoological Sciences (ISZS) initiated an international research program called Biological Consequences of Global Change (BCGC). In 2009, BCGC was adopted by the International Union of Biological Sciences (IUBS) as a new international research program. In 2012, BCGC was reviewed as the core of IUBS ...

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  • Why so many unknown genes? Partitioning orphans

    2013-2-27 · Genomic resources within the phylum Arthropoda are largely limited to the true insects but are beginning to include unexplored subphyla, such as the Crustacea and Chelicerata. Investigations of these understudied taxa uncover high frequencies of orphan genes, which lack detectable sequence homology to genes in pre-existing databases. The ticks (Acari: Chelicerata) are one such understudied ...

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  • Transcriptomic changes triggered by ouabain in rat ...

    Souhrn. It was shown previously that inhibition of the ubiquitous α1 isoform of Na +,K +-ATPase by ouabain sharply affects gene expression profile via elevation of intracellular [Na +] i /[K +] i ratio. Unlike other cells, neurons are abundant in the α3 isoform of Na +,K +-ATPase, whose affinity in rodents to ouabain is 10 4-fold higher compared to the α1 isoform.

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  • Frontiers | Risks to Health and Well-Being From Radio ...

    2019-8-13 · Radiation exposure has long been a concern for the public, policy makers, and health researchers. Beginning with radar during World War II, human exposure to radio-frequency radiation1 (RFR) technologies has grown substantially over time. In 2011, the International Agency for Research on Cancer (IARC) reviewed the published literature and categorized RFR as a “possible” (Group 2B) …

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