| [changes in the number of deer louse-flies lipoptena cervi (hippoboscidae) in the forests of northwestern russia]. | long term observations of the abundance fluctuations of the deer louse-fly lipoptena cervi were carried out in forest areas of the leningrad, novgorod and pskov provinces in 1988-1995. the registration of the winged individuals was held in the period of the mass flight in august by the number of deer louse-flies attacking a collector man during 1 km of the pathway. the abundance of deer louse-flies was being high everywhere up to 1993, while it decreased by 8-29 times in 1994-1995. the reason of ... | 1996 | 8984438 |