نتایج جستجو برای: worker bees

تعداد نتایج: 30225  

رحیم عبادی, , علیرضا عباسیان, ,

In order to study the effects of different protein feeds on honey bees (Apis mellifera L), experiments were conducted in a completely randomized block design with 15 treatments and 4 replicates. The nutritional effects of different treatments on caged bees were studied through recording half-life time (50% mortality). Pollen substitutes were soybean flour, soybean meal, bread yeast, wheat glute...

Journal: :The Journal of experimental biology 2012
Ying Wang Sarah D Kocher Timothy A Linksvayer Christina M Grozinger Robert E Page Gro V Amdam

Several lines of evidence support genetic links between ovary size and division of labor in worker honey bees. However, it is largely unknown how ovaries influence behavior. To address this question, we first performed transcriptional profiling on worker ovaries from two genotypes that differ in social behavior and ovary size. Then, we contrasted the differentially expressed ovarian genes with ...

Journal: :Molecular ecology 2002
Eva Tóth Joan E Strassmann Paulo Nogueira-Neto Vera L Imperatriz-Fonseca David C Queller

The genetic structure of social insect colonies is predicted to affect the balance between cooperation and conflict. Stingless bees are of special interest in this respect because they are singly mated relatives of the multiply mated honeybees. Multiple mating is predicted to lead to workers policing each others' male production with the result that virtually all males are produced by the queen...

2010
James H. Hunt Florian Wolschin Michael T. Henshaw Thomas C. Newman Amy L. Toth Gro V. Amdam

Polistes paper wasps are models for understanding conditions that may have characterized the origin of worker and queen castes and, therefore, the origin of paper wasp sociality. Polistes is "primitively eusocial" by virtue of having context-dependent caste determination and no morphological differences between castes. Even so, Polistes colonies have a temporal pattern in which most female larv...

2007
Siri-Christine Seehuus Kari Norberg Trygve Krekling Kim Fondrk Gro V. Amdam

Vitellogenin is a yolk precursor protein in most oviparous females. In the advanced eusocial honeybee, Apis mellifera (Hymenoptera: Apidae), vitellogenin has recently attracted much interest as this protein, in addition to a classical function in oocyte development in the reproductive queen caste, has evolved functions in the facultatively sterile female worker caste not documented in other spe...

2015
David A. Galbraith Xingyu Yang Elina Lastro Niño Soojin Yi Christina Grozinger

Populations of honey bees are declining throughout the world, with US beekeepers losing 30% of their colonies each winter. Though multiple factors are driving these colony losses, it is increasingly clear that viruses play a major role. However, information about the molecular mechanisms mediating antiviral immunity in honey bees is surprisingly limited. Here, we examined the transcriptional an...

2007
Siri-Christine Seehuus Kari Norberg Trygve Krekling Kim Fondrk Gro V. Amdam

Vitellogenin is a yolk precursor protein in most oviparous females. In the advanced eusocial honeybee, Apis mellifera (Hymenoptera: Apidae), vitellogenin has recently attracted much interest as this protein, in addition to a classical function in oocyte development in the reproductive queen caste, has evolved functions in the facultatively sterile female worker caste not documented in other spe...

2010
Gabriela P. Ramírez Andrés S. Martínez Vanesa M. Fernández Gonzalo Corti Bielsa Walter M. Farina

BACKGROUND Honeybees (Apis mellifera) exhibit an extraordinarily tuned division of labor that depends on age polyethism. This adjustment is generally associated with the fact that individuals of different ages display different response thresholds to given stimuli, which determine specific behaviors. For instance, the sucrose-response threshold (SRT) which largely depends on genetic factors may...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2004
Christian W W Pirk Peter Neumann Randall Hepburn Robin F A Moritz Jürgen Tautz

In many species of social Hymenoptera, unmated workers can lay eggs that will produce males by parthenogenesis. Nevertheless, in queenright honey bee colonies (Apis mellifera), worker reproduction is low. One possible mechanism for this difference is worker policing, the removal of worker-laid eggs by other workers. This behavior can evolve in species in which queens are multiply mated, where w...

2017
A. D. Vaudo D. Stabler H. M. Patch J. F. Tooker C. M. Grozinger G. A. Wright

Bee population declines are linked to the reduction of nutritional resources due to land-use intensification, yet we know little about the specific nutritional needs of many bee species. Pollen provides bees with their primary source of protein and lipids, but nutritional quality varies widely among host-plant species. Therefore, bees might have adapted to assess resource quality and adjust the...

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