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Trends in the distribution occurrence and abundance of two carabids coleoptera carabidae in slovakia czechoslovakia

, : Trends in the distribution occurrence and abundance of two carabids coleoptera carabidae in slovakia czechoslovakia. Biologia (Bratislava) 41(6): 549-556

A regressive trend in distribution and abundance is observed during recent years in the case of Carabus cancellatus Illiger, 1798, which was known formerly as widely distributed and common in Europe. Now it became very scarce in Slovakia at least. Survival of it's populations is now actual in extensively managed and undestroyed habitats free of chemical treatment. A very similar Carabus ullrichii Germar. 1824, is still less known than the former one, regarding the data published. But this second one is met now rather commonly and is even numerous, frequent locally. It seems, the second species replaces that first one continuously in suitable habitats through central Europe. The key factor, causing this trend is not simple, nor single probably and would be determined by carabidologists in near future.

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