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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Zimování včelstva
 Babica, Ondřej
In the breeding of honeybees (Apis mellifera L.), the good health of the bee colony is an important prerequisite for successful overwintering. The condition of the colonies is affected by environmental influences, the influence of genetics or the health status of the bees. Well-developed pharyngeal glands allow bee feeders to provide developing larvae with quality royal jelly. The longevity of the winter generation of bees is influenced by a many of physiological factors, which distinguish them from summer short-lived bees. The main factors of longevity appear to be the level of proteins in the hemolymph, especially vitellogenin, the level of juvenile hormone or the pheromone ethyl oleate. The natural immune system or the effects of oxidative stress also play an important role in the overwintering of colonies. Recently, overwintering is threatened by viral infections transmitted by varroa mite.
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