Frequency distribution of uropodine mites on four bark beetle species in mountain spruce forest | Frekvenčná distribúcia foretických uropodných rozpočtov na štyroch druhoch podkôrnikovitých v horskom smrekovom lese
2010
Kršiak, B., Slovak Academy of Sciences, Zvolen (Slovak Republic). Institute of Forest Ecology | Zach, P. | Kulfan, J.
The study is aimed to characterise frequency distribution of uropodid mites phoretic on the bark beetle Hylurgops palliatus, Hylastes cunicularius, Ips typographus and Pityogenes chalcographus (Coleoptera: Scolytidae), and to clarify the role of these scolytids in the transfer of uropodids in a mountain spruce forest. A total of 1,095 individuals of bark beetles caught in flight interception traps with no bait in Tatra Mountains, West Carpathians, Central Europe, yielded a total of 2,077 individuals and four species of uropodids. They were the following: Trichouropoda obscura, Trichouropoda pecinai, Trichouropoda polytricha, Uroobovella vinicalora. Frequency distribution of these uropodids (all mite species considered together) on the studied scolytid species, typically, was L-shaped. Transfers of a single uropodid specimen on the bark beetle vector were most frequent, approximately one third of all uropodids being vectored this way. Maximum number of uropodids collected from a single bark beetle individual: Hylastes cunicularius - 13, Hylurgops palliatus - 14, Ips typographus - 15, Pityagenes chalcographus - 8 uropodids. Frequent cases of low abundance of uropodis (one, two or three mite individuals) on their phoronts contribute to the entire mite transfer much more than those few cases where high number of uropodids is found attached to the phoront.
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