Genotypic differences in brood rearing in honey bee colonies: context-specific?

1994 ◽  
Vol 34 (2) ◽  
pp. 125-137 ◽  
Author(s):  
Gene E. Robinson ◽  
Robert E. Page ◽  
Naomi Arensen
Keyword(s):  
Honey Bee ◽  
Genotypic Differences ◽  
Brood Rearing ◽  
Context Specific ◽  
Bee Colonies

Genotypic differences in brood rearing in honey bee colonies: context-specific?

1994 ◽  
Vol 34 (2) ◽  
pp. 125-137 ◽  
Author(s):  
Gene?E. Robinson ◽  
Robert?E. Page?Jr. ◽  
Naomi Arensen
Keyword(s):  
Honey Bee ◽  
Genotypic Differences ◽  
Brood Rearing ◽  
Context Specific ◽  
Bee Colonies

scholarly journals The acaricidal effect of flumethrin, oxalic acid and amitraz against Varroa destructor in honey bee (Apis mellifera carnica) colonies

2011 ◽  
Vol 80 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Maja Ivana Smodiš Škerl ◽  
Mitja Nakrst ◽  
Lucija Žvokelj ◽  
Aleš Gregorc
Keyword(s):  
Apis Mellifera ◽  
Oxalic Acid ◽  
Honey Bee ◽  
Varroa Destructor ◽  
Colony Development ◽  
Apis Mellifera Carnica ◽  
Brood Rearing ◽  
Mite Control ◽  
Bee Colonies ◽  
Mite Mortality

During 2007 and 2008, natural mite mortality was recorded in honey bee colonies. These colonies were then treated with various acaricides against Varroa destructor and acaricide efficacies were evaluated. In 2007, experimental colonies were treated with flumethrin and/or oxalic acid and in 2008 the same colonies were treated with flumethrin, oxalic acid or amitraz. The efficacy of flumethrin in 2007 averaged 73.62% compared to 70.12% for three oxalic acid treatments. In 2008, a reduction of 12.52% in mite numbers was found 4 weeks after flumethrin application, while 4 oxalic acid applications produced significantly higher (P < 0.05) mite mortality, an average of 24.13%. Four consecutive amitraz fumigations produced a 93.82% reduction on average in final mite numbers and thus ensure normal colony development and overwintering. The study is important in order to demonstrate that synthetic acaricides should be constantly re-evaluated and the use of flumethrin at low efficacies need to be superseded by appropriate organic treatments to increase the efficacy of mite control in highly-infested colonies during the period of brood rearing.

scholarly journals The Importance of Time and Place: Nutrient Composition and Utilization of Seasonal Pollens by European Honey Bees (Apis mellifera L.)

Insects ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 235
Author(s):  
Gloria DeGrandi-Hoffman ◽  
Vanessa Corby-Harris ◽  
Mark Carroll ◽  
Amy L. Toth ◽  
Stephanie Gage ◽  
...  
Keyword(s):  
Gene Expression ◽  
Honey Bee ◽  
Nutrient Content ◽  
Seasonal Effects ◽  
Hypopharyngeal Gland ◽  
Yearly Cycle ◽  
Expression Levels ◽  
Brood Rearing ◽  
Bee Colonies ◽  
Gene Expression Levels

Honey bee colonies have a yearly cycle that is supported nutritionally by the seasonal progression of flowering plants. In the spring, colonies grow by rearing brood, but in the fall, brood rearing declines in preparation for overwintering. Depending on where colonies are located, the yearly cycle can differ especially in overwintering activities. In temperate climates of Europe and North America, colonies reduce or end brood rearing in the fall while in warmer climates bees can rear brood and forage throughout the year. To test the hypothesis that nutrients available in seasonal pollens and honey bee responses to them can differ we analyzed pollen in the spring and fall collected by colonies in environments where brood rearing either stops in the fall (Iowa) or continues through the winter (Arizona). We fed both types of pollen to worker offspring of queens that emerged and open mated in each type of environment. We measured physiological responses to test if they differed depending on the location and season when the pollen was collected and the queen line of the workers that consumed it. Specifically, we measured pollen and protein consumption, gene expression levels (hex 70, hex 110, and vg) and hypopharyngeal gland (HPG) development. We found differences in macronutrient content and amino and fatty acids between spring and fall pollens from the same location and differences in nutrient content between locations during the same season. We also detected queen type and seasonal effects in HPG size and differences in gene expression between bees consuming spring vs. fall pollen with larger HPG and higher gene expression levels in those consuming spring pollen. The effects might have emerged from the seasonal differences in nutritional content of the pollens and genetic factors associated with the queen lines we used.

scholarly journals Honey Bee Colonies Headed by Hyperpolyandrous Queens Have Improved Brood Rearing Efficiency and Lower Infestation Rates of Parasitic Varroa Mites

PLoS ONE ◽  
2015 ◽  
Vol 10 (12) ◽  
pp. e0142985 ◽  
Author(s):  
Keith S. Delaplane ◽  
Stéphane Pietravalle ◽  
Mike A. Brown ◽  
Giles E. Budge
Keyword(s):  
Honey Bee ◽  
Brood Rearing ◽  
Varroa Mites ◽  
Bee Colonies

Manipulating pollen supply in honey bee colonies during the fall does not affect the performance of winter bees

2007 ◽  
Vol 139 (4) ◽  
pp. 554-563 ◽  
Author(s):  
Heather R. Mattila ◽  
Gard W. Otis
Keyword(s):  
Apis Mellifera ◽  
Protein Content ◽  
Honey Bee ◽  
Colony Growth ◽  
Early Spring ◽  
Brood Rearing ◽  
Before And After ◽  
Bee Colonies

AbstractEach fall, honey bee (Apis mellifera L. (Hymenoptera: Apidae)) colonies in northern temperate regions rear a population of long-lived winter bees that maintains a broodless nest throughout the winter and resumes brood-rearing activities in the spring. Pollen supply in colonies is closely tied to this phenomenon; winter bees sequester large reservoirs of pollen-derived nutrients in their bodies and the brood-rearing capacity of colonies is dictated by the availability of pollen. We determined the effects of manipulating pollen supply during the fall on the number of winter bees present in colonies by spring, their mass and protein content before and after winter, and their capacity to rear brood during the spring. Colonies were either supplemented with or partially deprived of pollen during the fall, while a third group of colonies was not manipulated (control). We found that the performance of winter bees was not enhanced by supplementing colonies with pollen in the fall, nor did worker function suffer if pollen supply was restricted. Similar numbers of winter bees survived to spring in colonies and workers had similar physiology and brood-rearing efficiencies. These results suggest that beekeepers would not benefit by investing in fall pollen supplements to maximize colony growth in early spring.

scholarly journals The influence of temperature and photoperiod on the timing of brood onset in hibernating honey bee colonies

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4801 ◽  
Author(s):  
Fabian Nürnberger ◽  
Stephan Härtel ◽  
Ingolf Steffan-Dewenter
Keyword(s):  
Ambient Temperature ◽  
Honey Bee ◽  
Internal Clock ◽  
Floral Resources ◽  
Late Winter ◽  
Brood Rearing ◽  
Potential Risks ◽  
The Individual ◽  
The Impact ◽  
Bee Colonies

In order to save resources, honey bee (Apis mellifera) colonies in the temperate zones stop brood rearing during winter. Brood rearing is resumed in late winter to build up a sufficient worker force that allows to exploit floral resources in upcoming spring. The timing of brood onset in hibernating colonies is crucial and a premature brood onset could lead to an early depletion of energy reservoirs. However, the mechanisms underlying the timing of brood onset and potential risks of mistiming in the course of ongoing climate change are not well understood. To assess the relative importance of ambient temperature and photoperiod as potential regulating factors for brood rearing activity in hibernating colonies, we overwintered 24 honey bee colonies within environmental chambers. The colonies were assigned to two different temperature treatments and three different photoperiod treatments to disentangle the individual and interacting effects of temperature and photoperiod. Tracking in-hive temperature as indicator for brood rearing activity revealed that increasing ambient temperature triggered brood onset. Under cold conditions, photoperiod alone did not affect brood onset, but the light regime altered the impact of higher ambient temperature on brood rearing activity. Further the number of brood rearing colonies increased with elapsed time which suggests the involvement of an internal clock. We conclude that timing of brood onset in late winter is mainly driven by temperature but modulated by photoperiod. Climate warming might change the interplay of these factors and result in mismatches of brood phenology and environmental conditions.

EVALUATION OF RAPESEED FLOUR AND PEA PROTEIN CONCENTRATE AS PROTEIN SUPPLEMENTS FOR HONEY BEES (HYMENOPTERA: APIDAE)

1976 ◽  
Vol 108 (8) ◽  
pp. 845-848 ◽  
Author(s):  
Donald L. Nelson
Keyword(s):  
Honey Bee ◽  
Honey Bees ◽  
Protein Concentrate ◽  
Soya Flour ◽  
Pea Protein ◽  
Protein Supplements ◽  
Brood Rearing ◽  
Bee Colonies

AbstractRapeseed flour fed to package honey bee colonies was preferred to soya flour, wheast, and pea protein concentrate. Rapeseed flour was equal to wheast and fresh mixed pollen for longevity when fed in small cages. Rapeseed flour was equal to wheast but both were inferior to fresh mixed pollen for brood rearing. Pea protein concentrate was the poorest diet in longevity and brood rearing tests.

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