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Ichneumon flies of the genus Cratichneumon (Hymenoptera, Ichneumonidae) in the forest zone. 2. Peculiarities of ecology. Use of ecological indices for specification of species status

, : Ichneumon flies of the genus Cratichneumon (Hymenoptera, Ichneumonidae) in the forest zone. 2. Peculiarities of ecology. Use of ecological indices for specification of species status. Zoologicheskii Zhurnal 82(6): 677-686

The 20-year investigations showed that in the forest zone, the share of the genus Cratichneumon was more than 10% of the total abundance of Ichneumonidae. The data on the abundance, seasonal dynamics, and biotopic distribution for each of 18 species are given. The majority of the species (15) with an abundance of 95% is characteristic of forest ecosystems, coniferous stands in particular. Most of the representatives of the genus has long periods of seasonal activity; their maximum abundance is recorded in June. The biotopic distribution, multiyear and seasonal dynamics of activity in Cratichneumon nigritarius (Grav.) and C. pratincola Heinrich is an evidence of belonging these species to the species C. viator (Scopoli) (sensu Rasnitsyn, 1981).


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