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Females of Osmia rufa, as most species in this genus, enter an obligatory diapause, overwintering as an imago inside a cocoon until the ensuing spring when after emergence – mating, egg development and oviposition occur. Diapause in this species is initiated in November, undergoes 2months of a pre-wintering period that is terminated at the end of January, after 1month of maintenance. In this study,...
Winter months are supposed to be a crucial period for the development of the reproductive system, especially ovaries, in Osmia rufa females. During 7 months of the wintering period (from September till March), the length and width of terminal oocytes and protein concentrations in ovary and fat body tissue extracts of red mason bee females, O. rufa, were studied. Our observations indicate statistically...
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