Dr. Kassai Tibor - Dr. Murai Éva szerk.: Parasitologia Hungarica 6. (Budapest, 1973)
TENORA have shown the occurrence of larvae in numerous small mammalian species, namely in: 5 % of Apodemus flavicollis, 2 % of A. sylvaticus, 5 % of Microtus arvalis, 0 % of M . agrestis, 6 % of Mus musculus spicilegus, 1 % of albino laboratory breeds Of Mus musculus and Rattus rattus , 2 % of Clethrionomys glareolus and 1 % of Pitymys subterraneus. Since 1969, the Centr. Plant Prot, and Quarantine Lab., Rodent Laboratory Min. of Ag. Fd., has been continuing population-dynamic investigations on small rodents in agricultural fields. During this work we have also studied and estimated larval infections (strobilocercosis ) of Hydatigera taeniaeformis in the common vole, hypothesizing that it has an effect on the vole population . Material and Methods Half the examined material representing one population"*" came from permanent collections near the village Bük (West Hungary, Com. Vas, see Pig. l) in 1969-72. (Trapping in lines and 2 snap-traps taken in areas of 1000 m in perennial cultures alfalfa, clover, italian meadow-grass or a mixture of these two latter and in corn - autumn wheat and barley.) The other half of our material came from collections made in other parts of the comitats (Békés, Csongrád, Győr, Fejér, Heves, Nógrád, Tolna and Vas, see Fig. 1.) in two regions of each comitat and twice in the same locality for three days consecutively in leguminous and corn cultures during spring (March-April ) and autumn (October-December ) in 1971-72. In these areas the method of collection was always line-trapping(independent of abundance and hole sites, with 100 snap-traps/meter). On the basis of the home range of the common voles and their migration from one culture to another increased particularly owing to human activity (e.g. rotation of crops, harvesting, ploughing and harvesting of perennial cultures, pest control etc.) and resulting in sudden changes of the environment, the specimens living in open areas (at the border territories of one agricultural cooperative) have to be considered as one population . 120
