The study of circadian activity of bumblebees (Hymenoptera: Apidae, Bombus Latreille) of the Middle Ob lowlands
Тюмасева, Зоя Ивановна
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Using the example of two mass species of bumblebees in the Middle Ob lowland, it is shown that the change in bumblebees activity during the day is a species-specific indicator. B. distinguendus in the conditions of the Middle Ob lowlands are characterized by the morning-evening rhythm of activity, in B. lucorum, the activity is relatively uniform throughout the day. The optimal temperature for active foraging of both species varies within 19–25°С. The total duration of bumblebees diurnal activity at the beginning of the flight is 11–12 hours. In the period of the mass bumblebees flight, the duration increases to 18–19 hours.