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Showing 1 to 20 of 167 for “"Apis mellifera"”.
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Toxicogenomics of Apis Mellifera
Collectively, the studies reported in this dissertation demonstrate that honey bee P450s associated with detoxification are few in number, that these P450s appear to have evolved to respond specifically to natural compounds encountered in the hive environment, and that honey bees have a limited …
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Wachse der Honigbiene Apis mellifera carnica Pollm.
Um einen Beitrag zum besseren Verständnis der Rolle der Bienenwachse in der Kommunikation der Honigbienen leisten zu können, wurden Wabenwachse unterschiedlichen Alters und Kutikulawachse unterschiedlicher Kasten,Geschlechter und Berufsgruppen mit Hilfe von Gaschromatographie, Massenspektroskopie …
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Biogene Aminrezeptoren bei der Honigbiene Apis mellifera
Die Honigbiene Apis mellifera zeigt innerhalb einer Kolonie eine an das Alter gekoppelte Arbeitsteilung. Junge Honigbienen versorgen die Brut (Ammenbienen), während ältere Honigbienen (Sammlerinnen) außerhalb des Stocks Pollen und Nektar eintragen. Die biogenen Amine Octopamin und Tyramin sind an …
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Thermoregulation im Brutbereich der Honigbiene Apis mellifera carnica
Honigbienen (Apis mellifera carnica) regulieren die Temperatur ihrer Brut in einem sehr engen Temperaturfenster, da vor allem die gedeckelte Brut sehr temperaturempfindlich reagiert (Groh et al. 2004). Die Thermoregulation ist nicht – wie lange angenommen – Beiprodukt von alltäglichen Arbeiten der …
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The effect of neonicotinoids on Apis mellifera: A revisit
… colony mortality rates in the European honeybee (Apis mellifera), is a pressing economical and ecological problem. I revisited Woodcock et al.'s (2017a) paper, "Country-specic Effects of Neonicotinoid Pesticides on Honey Bees and Wild Bees", in light of unsound statistical methods used in the …
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Toward a Holobiont Urbanism : microbial sampling scalability through Apis mellifera
… material from cities by using honeybees (Apis mellifera) as a proxy to swab-based sampling methods.
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Molecular Characterization of Stress Response in Western Honey Bee (Apis mellifera)
<p>Honey bees are incredibly important for the reproduction of flowering plants and the sustainability of agricultural ecosystems. However, they face various stressors such as pesticides, pathogens, habitat loss, and climate change. Extensive research has been conducted to understand how bees …
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Molekulare und pharmakologische Charakterisierung von Serotonin-Rezeptoren der Honigbiene Apis mellifera
Die Honigbiene Apis mellifera gilt seit langem als Modell-Organismus zur Untersuchung von Lern- und Gedächtnisvorgängen sowie zum Studium des Sozialverhaltens und der Arbeitsteilung. Bei der Steuerung und Regulation dieser Verhaltensweisen spielt das Indolalkylamin Serotonin eine wesentliche Rolle. …
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Herdabilidades, correlações e análise de trilha em abelhas africanizadas (Apis mellifera)
Foram estudadas, em abelhas africanizadas, as correlações entre os caracteres produção de mel, peso pupal, largura e comprimento da tíbia do terceiro par de patas, área corbicular e comprimento da glossa. Todas as correlações foram significativas (P < 0,01 e/ou P < 0,05), exceto a entre o peso …
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Environmental influences on the development of the female honeybee brain Apis mellifera
Für die Honigbiene spielt der Geruchssinn eine entscheidende Rolle bei der Kommunikation innerhalb des Sozialstaates. Kastenspezifische, auf uweltbedingten Einflüssen basierende sowie altersbedingte Unterschiede im olfaktorisch gesteuerten Verhalten liefern ein hervorragendes Modellsystem für diese …
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Dynamics and Communication Structures of Nectar Foraging in Honey Bees (Apis mellifera)
In this thesis, I examined honey bee nectar foraging with emphasis on the communication system. To document how a honey bee colony adjusts its daily nectar foraging effort, I observed a random sample of individually marked workers during the entire day, and then estimated the number and activity of …
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Antioxidant Genes in <i>Apis mellifera</i>, Their Implication in Pesticide Detoxification
<p>The effect of pesticides on <em>Apis mellifera </em>mortality as well as their effect on the transcriptional regulation of antioxidant genes was the aim of this study. Unlike previous studies, the work here shows the combined effects of pesticides imidacloprid and coumaphos on worker bees at …
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Olfactory learning, its development and changing role in Honeybee (Apis Mellifera) behaviour
The honeybee (Apis mellifera) is capable of showing a wide variety of cognitive tasks, and can be readily conditioned in the laboratory to specific odours, paired with a sucrose reward, using the proboscis extension reflex (PER) learning paradigm. This thesis aims to establish any differences in …
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Neuroanatomical plasticity and division of labor in the honey bee (Apis mellifera)
"There is an aged-based division of labor in the honey bee colony. Adult workers spend the first several weeks performing tasks within the hive, including caring for brood (""nursing""). They then make a dramatic behavioral transition and begin foraging outdoors. Within the dark hive, tasks are …
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Sublethal dosage effects of carbaryl on honey bee (Apis mellifera (L.)) colonies
… effects of carbaryl were studied in honey bee (Apis mellifera L.) colonies. Carbaryl was fed to colonies during a 14-day period in a 0.95 M sucrose solution. Carbaryl dosages were based on 0.0036, 0.0178, and 0.0356 ug/bee/day, and concentrations approximated 0.09, 0.44, and 0.86 ppm, …
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IMPACT OF PESTICIDES ON THE NEURAL STRUCTURE OF THE HONEY BEE, APIS MELLIFERA
… and impair learning and memory in the honey bee, Apis mellifera. The mushroom bodies, insect brain regions required for learning and memory, receive GABAergic inputs that may be sensitive to fipronil. The synaptic organization of the mushroom bodies was investigated in adult worker honey bees …
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The Neurogenomic State Underlying Selfish and Altruistic Aggression in Honey Bees (Apis mellifera)
… aggression using the eusocial Western honey bee, Apis mellifera, as it displays aggression in altruistic and selfish contexts, allowing comparisons that improve our understanding regarding the molecular biology and neurogenomics underlying this ecologically important behaviour. Workers exhibit …
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Behavioral and molecular mechanisms of pheromone transmission in the honey bee (Apis mellifera)
The European honey bee (Apis mellifera) has a sophisticated system of pheromonal signals that mediate a wide range of behaviors important for their fitness, including reproductive dominance, nest defense, and cooperative brood care. In honey bees, there are two distinct pheromones emitted by …
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Naturally occurring resistance to Varroa destructor in the Western honey bee (Apis mellifera)
The honey bee is an important social insect; it along with other bee species can be regarded as a keystone organism. The pollination services bees provide are invaluable not only in terms of human health and food security, with an estimated worth of €153 billion to food production (Gallai et al., …
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