Gloria DeGrandi-Hoffman
United States Department of Agriculture
EcologyHoney beePopulationBotanyBiology
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Publications 101
#2Komi MessanH-Index: 2
Last. Yun KangH-Index: 15
view all 6 authors...
#1Komi MessanH-Index: 2
#2Marisabel Rodriguez Messan (ASU: Arizona State University)
Last. Yun Kang (ASU: Arizona State University)H-Index: 15
view all 5 authors...
Honeybees play an important role in sustaining the ecosystem. The rapid decline of their population have sparked a great concern worldwide. Field and theoretical studies have shown that the infestation of the parasitic Varroa mite could be one of the main reasons that lead to colony collapsing. In order to understand how mites affect population dynamics of honeybees and the healthy status of colony, we propose and study a brood-adultbee-mite model with time lag from brood to adult bee. Noting th...
#1Stephanie L. Gage (USDA: United States Department of Agriculture)
#1Stephanie L. Gage (USDA: United States Department of Agriculture)H-Index: 5
Last. Gloria DeGrandi-Hoffman (USDA: United States Department of Agriculture)H-Index: 26
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Pollen nutrition is necessary for proper growth and development of adult honey bees. Yet, it is unclear how pollen affects the honey bee brain and behavior. We investigated whether pollen affects amino acids in the brains of caged, nurse-aged bees, and what the behavioral consequences might be. We also tested whether parasitic stress altered this relationship by analyzing bees infected with prevalent stressor, Nosema ceranae. Levels of 18 amino acids in individual honey bee brains were measured ...
#1Jun Chen (ASU: Arizona State University)
#2Komi Messan (ASU: Arizona State University)H-Index: 2
Last. Yun Kang (ASU: Arizona State University)H-Index: 15
view all 6 authors...
Western honeybees (Apis Mellifera) serve extremely important roles in our ecosystem and economics as they are responsible for pollinating $ 215 billion dollars annually over the world. Unfortunately, honeybee population and their colonies have been declined dramatically. The purpose of this article is to explore how we should model honeybee population with age structure and validate the model using empirical data so that we can identify different factors that lead to the survival and healthy of ...
#1Gloria DeGrandi-Hoffman (ARS: Agricultural Research Service)H-Index: 26
#2Henry Graham (ARS: Agricultural Research Service)H-Index: 2
Last. Nick Ziolkowski (ARS: Agricultural Research Service)H-Index: 1
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: Commercial honey bee (Apis mellifera L.) colonies significantly contribute to agricultural productivity through crop pollination. Almond production requires the most colonies because there are more than a million acres of orchards that require cross-pollination for nut set. With the rising costs of managing and transporting colonies to almond orchards combined with the high colony losses beekeepers routinely experience, we asked if renting colonies for almond pollination was profitable. We con...
1 CitationsSource
#1Emily Watkins de Jong (ARS: Agricultural Research Service)H-Index: 1
#2Gloria DeGrandi-Hoffman (ARS: Agricultural Research Service)H-Index: 26
Last. Nick Ziolkowski (ARS: Agricultural Research Service)H-Index: 1
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Colonies of Apis mellifera provided with natural forage show decreased pathogen loads and increased overwintering success when compared with colonies provisioned with supplemental protein diets. Despite the potential benefits of a pollen-based diet, protein supplements are commonly used in colonies throughout the spring and increasingly through the fall and winter as the cost of pollen is greater than that of supplements and concerns exist over the potential for pollen to vector viruses to bee c...
1 CitationsSource
#1Jianghong Li (Fujian Agriculture and Forestry University)H-Index: 5
#2Matthew C. Heerman (ARS: Agricultural Research Service)H-Index: 5
Last. Yanping Chen (ARS: Agricultural Research Service)H-Index: 38
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Nutrition is involved in regulating multiple aspects of honeybee biology such as caste, immunity, lifespan, growth and behavioral development. Deformed wing virus (DWV) is a major pathogenic factor which threatens honeybee populations, and its replication is regulated by nutrition status and immune responses of honeybees. The alimentary canal of the honeybee is home to a diverse microbial community that provides essential nutrients and serves to bolster immune responses. However, to what extent ...
5 CitationsSource
#1Yazhou Zhao (ARS: Agricultural Research Service)H-Index: 4
#2Matthew C. Heerman (ARS: Agricultural Research Service)H-Index: 5
Last. Yanping ChenH-Index: 38
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The synergistic interactions between the ectoparasitic mite Varroa destructor and Deformed wing virus (DWV) lead to the reduction in lifespan of the European honey bee Apis mellifera and often have been implicated in colony losses worldwide. However, to date, the underlying processes and mechanisms that form the multipartite interaction between the bee, mite, and virus have not been fully explained. To gain a better understanding of honey bees’ defense response to Varroa mite infestation and DWV...
6 CitationsSource
#2Julia H. BowsherH-Index: 12
Last. Ashley L. St. ClairH-Index: 2
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5 CitationsSource
#1Farida Azzouz-Olden (Kentucky State University)H-Index: 2
#2Arthur G. Hunt (UK: University of Kentucky)H-Index: 36
Last. Gloria DeGrandi-Hoffman (ARS: Agricultural Research Service)H-Index: 26
view all 3 authors...
Bees are confronting several environmental challenges, including the intermingled effects of malnutrition and disease. Intuitively, pollen is the healthiest nutritional choice, however, commercial substitutes, such as Bee-Pro and MegaBee, are widely used. Herein we examined how feeding natural and artificial diets shapes transcription in the abdomen of the honey bee, and how transcription shifts in combination with Nosema parasitism. Gene ontology enrichment revealed that, compared with poor die...
2 CitationsSource