We here present the results of Aedes albopictus Mark-Release-Recapture (MRR) experiments in which sticky-traps (STs) were used to collect released females. Three MRRs were carried out in a 250 m radius area within the campus of Sapienza University in Rome (RM, central Italy) in summer 2008, releasing about 500 blood-fed females and employing 55 STs (≈1 ST/3,600 m2) in each replicate. Other 3 MRRs were carried out in a 500 m radius area in a rural/periurban site in the Province of Padova (PD, northern Italy) in summer 2009, releasing about 1.000 blood-fed females and employing 96 STs (≈1 ST/8,177 m2) in each replicate. Recaptures were carried out for 16 days after releases. The recapture rates obtained ranged between 3.3 and 5.1% in RM and 3.4 and 13.4% in PD. Most re-captured females were collected at the gravid stage in the first 8 days after releases. This observation - coupled with the results of single oviposition experiments carried out in PD simultaneously to the releases - allows to conclude that our results mainly refer to the dispersal of females looking for an oviposition site after having completed a single gonotrophic cycle triggered by the blood-meal provided before releases. The females were mostly recaptured at 50-200 m and 0-150 m from the release sites in RM and PD, respectively. Single females flew up to 230 and 464 m in 4 days in RM and PD, respectively. In both sites the females reached the limit of the study areas, indicating that they may probably fly even further away. The cumulative mean distance travelled was 105, 121, 139 m in RM and 110, 77, 68 m in PD. These results will be discussed with reference to the ecological characteristics of the two study areas. These data represent the first evaluation of Ae. albopictus movements in an European area and are instrumental to plan control activities and to determine appropriate control limits necessary to interrupt pathogen transmission in case of possible arbovirus epidemics in Europe, such the Chikungunya outbreak occurred in northern Italy in 2007.
First data on Aedes albopictus dispersal in Italy / Marini, Francesca; Caputo, Beniamino; Pombi, Marco; Travaglio, M.; Tarsitani, G.; Montarsi, F.; Drago, A.; DELLA TORRE, Alessandra. - (2010), pp. 185-185. (Intervento presentato al convegno 59th American Society of Tropical Medicine and Hygiene tenutosi a Atlanta, Georgia USA nel 3-7 Nov 2010).
First data on Aedes albopictus dispersal in Italy.
MARINI, FRANCESCA;CAPUTO, BENIAMINO;POMBI, MARCO;DELLA TORRE, Alessandra
2010
Abstract
We here present the results of Aedes albopictus Mark-Release-Recapture (MRR) experiments in which sticky-traps (STs) were used to collect released females. Three MRRs were carried out in a 250 m radius area within the campus of Sapienza University in Rome (RM, central Italy) in summer 2008, releasing about 500 blood-fed females and employing 55 STs (≈1 ST/3,600 m2) in each replicate. Other 3 MRRs were carried out in a 500 m radius area in a rural/periurban site in the Province of Padova (PD, northern Italy) in summer 2009, releasing about 1.000 blood-fed females and employing 96 STs (≈1 ST/8,177 m2) in each replicate. Recaptures were carried out for 16 days after releases. The recapture rates obtained ranged between 3.3 and 5.1% in RM and 3.4 and 13.4% in PD. Most re-captured females were collected at the gravid stage in the first 8 days after releases. This observation - coupled with the results of single oviposition experiments carried out in PD simultaneously to the releases - allows to conclude that our results mainly refer to the dispersal of females looking for an oviposition site after having completed a single gonotrophic cycle triggered by the blood-meal provided before releases. The females were mostly recaptured at 50-200 m and 0-150 m from the release sites in RM and PD, respectively. Single females flew up to 230 and 464 m in 4 days in RM and PD, respectively. In both sites the females reached the limit of the study areas, indicating that they may probably fly even further away. The cumulative mean distance travelled was 105, 121, 139 m in RM and 110, 77, 68 m in PD. These results will be discussed with reference to the ecological characteristics of the two study areas. These data represent the first evaluation of Ae. albopictus movements in an European area and are instrumental to plan control activities and to determine appropriate control limits necessary to interrupt pathogen transmission in case of possible arbovirus epidemics in Europe, such the Chikungunya outbreak occurred in northern Italy in 2007.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
