Seasonal patterns of life cycle of ground beetle carabus nitens (Coleoptera, carabidae) in southern tundra

Seasonal dynamics of activity and demographic structure of Carabus nitens in the forest-tundra and southern tundra of the Kanin Peninsula was studied. In the northernmost range, the species has a one-year life cycle with reproduction in the early season and summer larvae. C nitens demonstrated elongated period of development from egg to imago compared to the temperate zone in the polar region. At the same time, over-wintered beetles rapidly matured and the reproduction period was reduced to three decades. This synchronizes larval development and the young generation emergence. The northern populations have increased life span of imago, which leads to repeated postwinter reproduction during several seasons. As a result, the abundance of the northern C nitens populations remains high.