Abstract
During a study 20 hydrophilid beetle species and 2,457 individuals of beetles belonging to 4 genera: Cercyon, Cryptopleurum, Megasternum and Sphaeridium were collected. On the surface of the bodies of 59 beetles (2.40% of the beetles collected) belonging to six species, 174 cases of phoresy [55 deutonymphs of Uropoda orbicularis (MĂźller, 1776) and 119 pedicels without deutonymphs] were observed. New hydrophilid beetle carriers of phoretic deutonymphs of U. orbicularis are given. Most mites were carried by Sphaeridium species. The population dynamics of both groups of arthropods was also studied. Most cases of phoresy were recorded in May and in the second half of July. However, phoretic deutonymphs were not present on the body surface of hydrophilid beetles throughout the whole period of this study.
Highlights
There are many papers on phoresy of uropodid mites on scarabaeid beetles (e.g. Costa, 1963; Stewart & Davis, 1967; Chmielewski, 1977; Hunter & Rosario, 1988; Mašán, 1994; 2001; Gwiazdowicz, 2000; Kofler & Schmölzer, 2000; Báoszyk et al, 2002; Bajerlein & Báoszyk, 2004; Haitlinger, 2004)
We found phoretic deutonymphs of U. orbicularis on beetles belonging to the families Staphylinidae, Histeridae, Aphodiidae, Geotrupidae and Scarabaeidae
Uropoda orbicularis is known to be phoretic on a wide range of dung beetles (e.g. Faash, 1967; Makarova, 1995; Haitlinger, 1999; Gwiazdowicz, 2000; Mašán, 2001; Bajerlein & Báoszyk, 2004)
Summary
There are many papers on phoresy of uropodid mites on scarabaeid beetles (e.g. Costa, 1963; Stewart & Davis, 1967; Chmielewski, 1977; Hunter & Rosario, 1988; Mašán, 1994; 2001; Gwiazdowicz, 2000; Kofler & Schmölzer, 2000; Báoszyk et al, 2002; Bajerlein & Báoszyk, 2004; Haitlinger, 2004). There are many papers on phoresy of uropodid mites on scarabaeid beetles Costa, 1963; Stewart & Davis, 1967; Chmielewski, 1977; Hunter & Rosario, 1988; Mašán, 1994; 2001; Gwiazdowicz, 2000; Kofler & Schmölzer, 2000; Báoszyk et al, 2002; Bajerlein & Báoszyk, 2004; Haitlinger, 2004). Phoresy of uropodid mites on hydrophilid beetles is poorly known. Kofler & Schmölzer (2000) give only Cercyon impressus as the carrier of deutonymphs of U. orbicularis and Uroobovella obovata (Canestrini, Berlese 1884) in Austria. The main purpose of this study was to determine the species of hydrophilid beetles that carry phoretic deutonymphs of U. orbicularis and determine whether phoretic deutonymphs show a preference for a particular species of carrier. The infestation rates of beetles by phoretic deutonymphs and the population dynamices of both groups of arthropods were recorded
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