Relation between parasites, reproductive index and habitat change in Rock Partridge (Alectoris graeca) populations in the central Southern Alps.

Relation between parasites, reproductive index and habitat change in Rock Partridge (Alectoris graeca) populations in the central southern alps. FABRO C.1, VISINTIN A.1, FILACORDA S.1, FRANGIPANE DI REGALBONO A.2, ARTUSO I.3 1Department of Agriculture and Environmental Sciences \u2013 University of Udine 2Department of Experimental Veterinary Science- University of Padua 3Comprensorio Alpino N\ub01 Val Brembana Hunting district Within the hunting district of Val Brembana the presence of parasites along the intestinal tract in 60 individuals (32 adults and 22 juveniles, 6 indeterminate) has been studied and correlated to the reproductive indexes (R.I, measured on 3 and 6 years) of Rock Partridges Alectoris graeca saxatilis in 6 different sectors and the habitat change. Within these sectors the coverage (%) of several environmental classes in different sample areas has been identified through photo interpretation over a time interval of 25 years. In the whole area a high spread of the nematode Ascaridia was observed and high values of prevalence (P = 69.49%) and mean abundance (MA = 15.21) have been found, while the presence of genus Capillaria was low with MA = 0.17 and P = 13.56%. Heterakis was isolated in 33.90% of the Rock Partridges, with MA = 1.45. For Ascaridia and Heterakis the relationship between variance and mean abundance (s2/MA) was significantly greater than one (Ascarids = 48.94; Heterakis: 7.90) and the aggregation index k (s2 / (s2-MA) ) was very close to zero, proving that these parasites show a highly aggregated distribution within host populations. When analyzing separately the 2 age classes there seemed to be no significant difference in parasitic infection susceptibility between juveniles (P = 95.45%) and adults (P = 84.95%). Only MA and P of Heterakis in different sectors was negatively correlated to a change in reproductive success, both in short and medium term, while the sectors with the greatest MA of Ascaridia, both in short and medium term, showed the highest mean reproductive rates and the sectors with the highest k of Capillaria had the highest R.I. The presence of parasites and particularly the value of MA of Capillaria and the average total number of parasites seemed to increase with the decreasing of open areas (coverage) in the different sectors of the study area, as well as with the decreasing of this observed coverage throughout the 25 year period. A negative correlation between open areas and the s2/AM ratio was discovered to be very clear. The presence of open areas seemed to affect significantly the abundance of parasites that in turn seemed to only partially drive R.I changes. The research was supported by Comprensorio Alpino N\ub0 1 Val Brembana Hunting district

Coelomomyces psorophorae var. psorophorae (Phycomycetes: Blastocladiales) in Aedes caspius (Diptera: Culicidae) in north eastern Italy

Il s'agit de la premiere observation en Italie de Coelomomyces psorophorae var. psorophorae observe dans neuf exemplaires parmi 2207 Aedes caspius examines. L'abdomen des moustiques parasites etait rempli de sporanges jaune-brunâtres ovoides dont les traits morphologiques, voir les mesures, la forme, les ornementations de la paroi et la ligne de dehiscence, observes en microscopie optique a lumiere directe et en microscopie electronique, nous ont permis l'identification du parasite Coelomomyces psorophorae var. psorophorae

Quantitative monitoring of selected groups of parasites in domestic ruminants: A comparative review

Parasites have had a significant impact on domestic ruminant health and production for a long time, but the emerging threat of drug resistance urgently requires an improved approach to parasite monitoring and control activities. The study reviewed the international literature to analyze the different proposals for the sampling approach and the quantitative estimation of parasite burdens in groups of animals. Moreover, the use of thresholds to decide when and which animal to treat was also investigated. The findings of the study highlighted the presence of a wide-ranging literature on quantitative monitoring for gastrointestinal nematodes (GIN), while more limited data were found for coccidia, and no specific indications were reported for tapeworms. Concerning liver flukes, bronchopulmonary nematodes (BPN) and permanent ectoparasites (lice and mange mites), the diagnostic process is usually aimed at the detection of the parasite rather than at the burden estimation. The main research gaps that need further investigation were also highlighted. For some groups of parasites (e.g., GIN and coccidia) the quantitative approach requires an improved standardization, while its usefulness needs to be confirmed for others (e.g., BPN and lice). The development of practical guidelines for monitoring is also encouraged

Le principali elmintiasi degli ovi-caprini

Laceno, Bagnoli Irpin

Le principali elmintiasi degli ovi-caprini

Laceno, Bagnoli Irpin