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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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  • Modelling Food and Population Dynamics in Honey

    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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  • Modeling Honey Bee Populations - NASA/ADS

    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 - Europe PMC

    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.

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

    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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  • Modelling Food and Population Dynamics in Honey Bee

    2014-3-26 · 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.

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  • Modeling the Influence of Mites on Honey Bee

    The Varroa destructor mite has been associated with the recent decline in honey bee populations. While experimental data are crucial in understanding declines, insights can be gained from models of honey bee populations. We add the influence of the V. destructor mite to our existing honey bee model in order to better understand the impact of mites on honey bee colonies.

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  • 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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  • Evaluating competition for forage plants between

    2021-4-28 · A recurrent concern in nature conservation is the potential competition for forage plants between wild bees and managed honey bees. Specifically, that the highly sophisticated system of recruitment and large perennial colonies of honey bees quickly exhaust forage resources leading to the local extirpation of wild bees. However, different species of bees show different preferences for forage ...

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  • Honey bee and native solitary bee foraging behavior

    Authors: María Cecilia Estravis Barcala aff001; Florencia Palottini aff001; Walter Marcelo Farina aff001 Authors place of work: Universidad de Buenos Aires, Facultad de Ciencias

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  • Honey bee and native solitary bee foraging behavior

    The foraging activity of honey bees Apis mellifera and non—Apis bees on hybrid sunflowers (Helianthus annuus) and its influence on cross—pollination and seed set. J Apicult Res. 2000; 39(1–2): 37–45. doi: 10.1080/00218839.2000.11101019. 11. Greenleaf SS, Kremen C. Wild bees enhance honey bees’ pollination of hybrid sunflower. P. Natl ...

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  • mBio Journal Homepage - Home | mBio

    2012-2-23 · mBio covers the enormity of the interconnected microbial world: from symbiosis to pathogenesis, energy acquisition and conversion, climate change, geologic change, food and drug production, and even animal behavioral change.

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  • Putative determinants of virulence in Melissococcus ...

    2020-12-1 · Melissococcus plutonius is a bacterial pathogen that causes epidemic outbreaks of European foulbrood (EFB) in honey bee populations. The pathogenicity of a bacterium depends on its virulence, and understanding the mechanisms influencing virulence may …

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  • Firm Efficiency and Returns-to-Scale in the Honey Bee ...

    Where Y i is a (k × 1) vector of outputs produced by the i th DMU using X i, an (r × 1) vector of inputs. Y is the (k × n) matrix of the outputs and X is the (r × n) vector of inputs for all n DMUs in the sample. λ is the (n × 1) vector of weights attached to each of the n DMUs (λ i).N1 is an (n × 1) vector of unit values. The value, 1− θ ^ i ⁠, represents the proportional ...

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  • Decline of native bees (Apidae: Euglossa ... - Home -

    2020-6-19 · We measured abundance, diversity, and richness of Euglossa bees (Euglossini, Apidae) in lowland semi-deciduous forest in Darién National Park, Panamá, during the wet and dry seasons in the canopy and understory for five consecutive years (2013 to 2017) using McPhail traps baited with eucalyptus oil. We found a precipitous decline in abundance and richness throughout the 5 years of …

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  • Nutrition affects survival in African honeybees

    2013-11-27 · 2011), and managed populations of honeybees have recently suffered heavy overwintering losses (e.g. vanEngelsdorp et al. 2008). This decline in wild and managed pollinators threatens agricultural output (Steffan‐Dewenter, Potts & Packer 2005) and …

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  • Honeybee-Specific Lactic Acid Bacterium

    2019-6-17 · Paenibacillus larvae, the causative agent of American foulbrood (AFB), is the primary bacterial pathogen affecting honeybees and beekeeping. The main methods for controlling AFB are incineration of diseased colonies or prophylactic antibiotic treatment (e.g., with tylosin), neither of which is fully satisfactory. The search for superior means for controlling AFB has led to an increased ...

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  • Landscape diversity moderates the effects of bee ...

    2014-5-16 · Conceptual models of (a) the independent linear regressions that have been conducted in the past that qualitatively assess the relative relationships between the three variables: landscape, bees and yield, and (b) conditional process modelling to quantitatively determine whether bees mediate the effects of landscape on pumpkin yield and whether the landscape moderates or changes the effects of ...

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  • Insecticides: Impact on the Environment ... - Home -

    2013-12-8 · Insecticides have saved millions of human and animal lives since the date of their synthesis and use. They have played an important role that brought revolution in the field of agriculture and human health on control of insect pests of crops and vector-borne diseases. More than 80,000 chemical substances are now commercially available in ...

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  • Diet quantity influences caste determination in

    2020-5-27 · In many bee species, environmental cues drive female larvae into irreversible queen or worker developmental pathways . These cues vary by species among eusocial Hymenoptera; however, only a few studies have fully characterized the cues that drive this divergence [ 25 , 26 , 28 , 29 ].

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  • Promoting Data Collection in Pollinator Citizen

    2020-1-20 · If the floral visitor was a bee, in the second and third steps the trainee would then identify the bee to five morphological groups (honey bee, bumble bee, other large bee, green bee, and small bee) and take a photograph of the bee and the plant (flower, leaf, and leaf attachment to the stem) from which the bee was collecting resources.

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  • Firm Efficiency and Returns-to-Scale in the Honey Bee ...

    Where Y i is a (k × 1) vector of outputs produced by the i th DMU using X i, an (r × 1) vector of inputs. Y is the (k × n) matrix of the outputs and X is the (r × n) vector of inputs for all n DMUs in the sample. λ is the (n × 1) vector of weights attached to each of the n DMUs (λ i).N1 is an (n × 1) vector of unit values. The value, 1− θ ^ i ⁠, represents the proportional ...

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  • Preliminary Assessment of Bumble Bee (Hymenoptera:

    2018-11-29 · Abstract. The Philippines is a biodiversity hotspot and is home to thousands of endemic species, including at least two understudied bumble bee species: Bombus flavescens Smith, 1952 and Bombus irisanensis Cockerell, 1910. Since the 1990s, there have been virtually no studies published on the biology, ecology, and taxonomy of Philippine bumble bees—evidence of the dearth of basic ...

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  • Do the Quality and Quantity of Honey Bee-Collected

    Pollen is the source of protein for most bee species, yet the quality and quantity of pollen is variable across landscapes and growing seasons. Understanding the role of landscapes in providing nutritious forage to bees is important for pollinator health, particularly in areas undergoing significant land-use change such as in the Northern Great Plains (NGP) region of the United States where ...

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  • Adaptive evolution of honeybee dance dialects. -

    2020-3-4 · Europe PMC is an archive of life sciences journal literature. Please help EMBL-EBI keep the data flowing to the scientific community! Take part in our Impact Survey (15 minutes).

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  • Browse by Author or creator - Strathprints

    2021-4-3 · Gray, Alison and Peterson, Magnus Investigating honey bee colony losses from surveys of beekeepers. In: Royal Statistical Society Conference, 4–7 September 2017, Glasgow, 2017-09-04 - 2017-09-07. Alghamdi, Abdulaziz Saleh H and Gray, Alison Multivariate statistics for analysis of honey bee …

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  • EconPapers: PLOS ONE

    2020-3-7 · Volume 14, issue 12, 2019 The technological, organizational and environmental determinants of adoption of mobile health applications (m-health) by hospitals in Kenya pp. 1-25 Bahati Prince Ngongo, Phares Ochola, Joyce Ndegwa and Paul Katuse Interactions of pharmaceutical companies with world countries, cancers and rare diseases from Wikipedia network analysis pp. 1-25

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  • Landscape diversity moderates the effects of bee ...

    2014-5-16 · Conceptual models of (a) the independent linear regressions that have been conducted in the past that qualitatively assess the relative relationships between the three variables: landscape, bees and yield, and (b) conditional process modelling to quantitatively determine whether bees mediate the effects of landscape on pumpkin yield and whether the landscape moderates or changes the effects of ...

    Get Price
  • Ultrastructural Characterization of Olfactory Sensilla

    2011-7-17 · Scanning electron microscopic studies of antennal receptors of the worker honey bee, including sensilla campaniformia. Ann Entomol Soc Am. 1971;64:919-925 66. Gramacho KP, Gonçalves LS, Stort AC. et al. Is the number of antennal plate organs (sensilla placodea) greater in hygienic than in non-hygienic Africanized honey bees?.

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  • Browse by Author or creator - Strathprints

    2021-4-3 · Gray, Alison and Peterson, Magnus Investigating honey bee colony losses from surveys of beekeepers. In: Royal Statistical Society Conference, 4–7 September 2017, Glasgow, 2017-09-04 - 2017-09-07. Alghamdi, Abdulaziz Saleh H and Gray, Alison Multivariate statistics for analysis of honey bee …

    Get Price
  • Preliminary Assessment of Bumble Bee (Hymenoptera:

    2018-11-29 · Abstract. The Philippines is a biodiversity hotspot and is home to thousands of endemic species, including at least two understudied bumble bee species: Bombus flavescens Smith, 1952 and Bombus irisanensis Cockerell, 1910. Since the 1990s, there have been virtually no studies published on the biology, ecology, and taxonomy of Philippine bumble bees—evidence of the dearth of basic ...

    Get Price
  • Adaptive evolution of honeybee dance dialects. -

    2020-3-4 · Europe PMC is an archive of life sciences journal literature. Please help EMBL-EBI keep the data flowing to the scientific community! Take part in our Impact Survey (15 minutes).

    Get Price
  • Variation in Pollen-Donor Composition among

    2015-3-20 · In plants, reproductive success is largely determined by the composition of pollen (i.e., self-pollen and outcross-pollen from near and distant pollen-donors) transported as a result of pollinator foraging behavior (e.g., pollen carryover). However, little ...

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  • Impacts of Climate Change on the Distributions of ...

    Africanized honey bees in urban environments: ... Different climatic envelopes among invasive populations may lead to underestimations of current and future biological invasions. ... Modeling potential climate change impacts on the trees of the northeastern United States.

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  • Publications - Home - TissueGnostics

    2021-6-16 · TissueGnostics is the expert in microscope automation, image analysis, cell analysis, tissue analysis and blood analysis and automated digital cell morphology. Our list of products ranges from microscopy workstations to stand alone software for image analysis, cell analysis, tissue analysis and systems that can identify and pre-classify white blood cells for the hematology field.

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  • EconPapers: PLOS ONE

    2021-6-12 · Volume 12, issue 12, 2017 Reinforcement learning account of network reciprocity pp. 1-8 Takahiro Ezaki and Naoki Masuda Chinese version of the Perceived Stress Scale-10: A psychometric study in Chinese university students pp. 1-8 Wei Lu, Qian Bian, Wenzheng Wang, Xiaoling Wu, Zhen Wang and Min Zhao Size, skills, and suffrage: Motivated distortions in perceived formidability of …

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  • Pollination, Crop Productivity, and Arthropod and Bird ...

    DeVetter, L.W., Watkinson, S., Sagili, R. & Lawrence, T. 2016 Honey bee activity in northern highbush blueberry differs across growing regions in Washington State HortScience 51 1228 1232 doi: 10.21273/HORTSCI10934-16

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  • A. Townsend Peterson | Distinguished Professors

    2021-5-22 · A continental-scale perspective on the peopling of the Americas: Modeling geographic distributions and ecological niches of Pleistocene populations. Current Research in the Pleistocene , 24 , 19-22. Bonaccorso, E. & Peterson, A. T. (2007).

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  • A. Townsend Peterson | Department of Ecology ...

    2021-6-1 · My work focuses on aspects of the geography of biodiversity, with a focus on tropical ornithology and systematics, distributional ecology, and disease transmission risk mapping. My group of students and colleagues is diverse and global, including people interested in the three themes of my interests, from many countries and backgrounds. Research.

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  • On the Front Line: Quantitative Virus Dynamics in

    79. Neumann P , Ya nez O , Fries I , de Miranda JR ( 2012 ) Varroa invasion and virus adaptation . Trends in Parasitology 28 : 353 - 354 . 80. De Miranda JR , Gauthier L , Ribie`re M , Chen YP ( 2012 ) Honey bee viruses and their effect on bee and colony health . In: Press C, editor. Honey bee colony health: Challenges and Sustainable solutions .

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  • Department of Biological Sciences - Publications ...

    2020-9-3 · Home > Biological Sciences home > Research > Profile > Publications. Department of Biological Sciences. Show 5 research groupings ... Landscape effects on extremely fragmented populations of a rare solitary bee, Colletes floralis Davis, E. S., Murray ... Locally adapted fish populations maintain small-scale genetic differentiation despite ...

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  • Centre for Ecology, Evolution and Behaviour -

    Brood-cell size does not influence the susceptibility of honey bees (Apis mellifera) to infestation by tracheal mites (Acarapis woodi) McMullan, J. B. & Brown, M. J. F. , Aug 2006 , In: Experimental and Applied Acarology. 39 , 3-4 , p. 273-280 8 p.

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  • A Single Gene Causes Thelytokous ... - Home: Cell Press

    2020-5-7 · Reversions from sexual to asexual reproduction are rare. Yagound et al. identify a genetic variant that is consistently associated with asexual reproduction in the honeybee at individual and population scales. The gene likely orchestrates the fusion of maternal pronuclei in the egg to restore diploidy without need of a sperm.

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  • Crithidia bombi can infect two solitary bee species

    Similarly, access to pollen can increase honey bee survival, while simultaneously increasing pathogen loads of the microsporidians Nosema apis (Rinderer and Dell Elliott, Reference Rinderer and Dell Elliott 1977) and Nosema ceranae (Zheng et al., Reference Zheng, Lin, Huang, Sohr, Wu and Chen 2014; Jack et al., Reference Jack, Uppala, Lucas and ...

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  • Polarized Skylight Navigation in Insects: Model and ...

    2008-2-1 · INTRODUCTION. As a result of sunlight scattering in the atmosphere, skylight is partially plane-polarized, i.e., in any point of the sky a particular orientation of the electric vector (e-vector) of light dominates (Strutt 1871; for graphical representations of the celestial polarization pattern, see Fig. 1 in Wehner 1997).Many insects exploit skylight polarization for visual compass orientation.

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  • Quantitative assessment of fish larvae community ...

    2021-1-8 · Introduction. Assessing larval community composition is needed to provide accurate information about spawning areas for fisheries management and conservation, but the location and dispersal of larval stages are largely unknown aspects of many fish life cycles (Legrand et al. 2019).Early life stages of organisms are particularly sensitive to abiotic stressors (Radchuk et al. 2013) and, for …

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  • Archives 2010 - 2019: Seminars and Events -

    Honey bee gut microbiota - a versatile model for microbial symbiosis: PV 8.12: Martha Clokie, Department of Infection, Immunity and Inflammation, University of Leicester: The ecology, evolution and applications of Clostridium difficile bacteriophages: PL 15.12

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  • Sustainability by design : motivating pro

    Engaging the public in sustainable actions is essential for reaching local and global sustainability goals. The first two research questions of this dissertation focus on strategies to reduce contamination of waste in private and public areas through active and passive prompts, and immediate feedback on errors. The third research question expands the behavioural analysis to examine willingness ...

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  • Travel fosters tool use in wild chimpanzees | eLife

    2016-7-19 · The Sonso chimpanzees are opportunists in relation to honey consumption, acquiring honey from natural bee nests (Xylocopa and Apis genus). Honey acquisition does not involve any tool use and is carried out with limited success only (T. Gruber, personal observation). In our honey-trap experiment, we provided subjects with the opportunity to ...

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