Kleszcz bydlęcy Boophilus microplus [Canestrini, 1888] [Acarina, Ixodidae]

The external morphology and life cycle of Boophilus microplus - a cattle tick - were given. The control of ticks as well as host resistance to ticks were also mentioned

Popytka opredelenija parazitofauny nematodov pishhebaritel'nogo trakta ovec na osnovanii issledovanija fekalijj

The authors gives a comparative schedule of characteristic ova features collected from 13 kinds of threadworms, parasites found in the digestive duet of sheep and illustrates it with drawings and photos. On base of faeces examination she detected ova belonging to Oesophagostomum columbianum Curtice, a parasite which was not quoted in the Polish fauna up to now

THE INFLUENCE OF DIFFERENT MANAGEMENT SYSTEMS ON THE INFECTION LEVEL OF SOME GASTROINTESTINAL PARASITES IN SHEEP IN SOUTHERN POLAND

On the basis of the fecal egg counts, larval cultures and necropsies the infection of coccidia, tapeworms and gastrointestinal nematodes in dams and lambs under extensive and intensive management systems were estimated. During 1994 and 1995 total of 1740 coproscopic analyses were done. It was state, that in extensive farms the prevalence and EPG of gastrointestinal nematodes was higher in comparison with intensive management system (38.2-86% and 13.9-71.9% and 105-355 EPG and 33-131 EPG respectively). Similarly prevalence of tapeworms 0-18.2% and 1.3-8.3% respectively. Prevalence and intensity of coccidia was lower in extensive farms (20-78,5% and 83-482 OPG) comparing with intensive management system (38.2-88% and 139-2846 OPG). Predominant nematode species in both management systems were those from genes Haemonchus, Teladorsagia, Trichostrongylus, Cooperia and Nematodirus. One species - Nematodirus battus was found new for Poland

Behavioral response to antennal tactile stimulation in the field cricket Gryllus bimaculatus

We examined behavioral responses of the field cricket Gryllus bimaculatus to tactile stimuli to the antennae. Three stimulants of similar shape and size but different textures were used: a tibia from the hunting spider Heteropoda venatoria (potential predator), a tibia from the orb-web spider Argiope bruennichi (less likely predator), and a glass rod. Each stimulus session comprised a first gentle contact and a second strong contact. The evoked behavioral responses were classified into four categories: aversion, aggression, antennal search, and no response. Regardless of the stimulants, the crickets exhibited antennal search and aversion most frequently in response to the first and second stimuli, respectively. The frequency of aversion was significantly higher to the tibia of H. venatoria than to other stimulants. The most striking observation was that aggressive responses were exclusive to the H. venatoria tibia. To specify the hair type that induced aggression, we manipulated two types of common hairs (bristle and fine) on the tibia of the predatory spider. When bristle hairs were removed from the H. venatoria tibia, aggression was significantly reduced. These results suggest that antennae can discriminate the tactile texture of external objects and elicit adaptive behavioral responses