Mark-Release-Recapture (MRR) Study to Determine the Dispersal of Aedes aegypti and Aedes albopictus in Dehradun City, Uttarakhand

Abstract

Background and Objectives: Knowledge about the movement of adult mosquito vectors in endemic and epidemic areas is valuable for understanding disease transmission dynamics providing a phenomenon of the behaviour, biology, demography, ethology and patterns of disease transmission.Methods: With this respect, the dispersal range of Ae. aegypti and Ae. albopictus had been conducted based on mark-release-recapture method in the campus periphery of Dayanand Anglo Vedic Post Graduate College, Dehradun, Uttarakhand, in the month of June 2015.Results: Aedes recaptured from various distances consist of 21.21% within 20 m, 45.45% within 50 m and 72.72% within 80 m distance from the release point. However, mean dispersion distances of Ae. aegypti and Ae. albopictus were found to be 31.78 m and 97.36 m respectively. The R 2 value was found higher in case of Ae. aegypti (0.6795) than Ae. albopictus (0.3597), indicating that Ae. albopictus dispersed more than Ae. aegypti. Using the non-parametric test, Mann-Whitney test for two independent samples, the results showed there is no significant difference (p ≤0.05) of flight range of the two species (z=−0.7181, p=0.47152 ). Interpretation and Conclusion:Less recapture rate of male than female justified the fact that mosquitoes will be forced to fly greater distances than they normally would if released at a point distance from any of the enumerated ovipositing items. From the present study, it was suggested that adulticiding should be intensified up to 100 m in and around the periphery of the reported dengue incidences for a week. Busy roads or unshaded areas may serve as barriers to movement of Aedes species and thus water holding containers should be targeted for more intensive adulticiding.

The influence of roads on the fine-scale population genetic structure of the dengue vector Aedes aegypti (Linnaeus)

“…Studies in MRR of Ae. aegypti demonstrated that the dispersal of this mosquito vector could be influenced by the type of road [17][18]. Ae.…”

“…Ae. aegypti prefer crossing smaller and quieter roads as compared to larger and busy roads [17][18]. To date, the only study that investigated the effect of road such as highway on Ae.…”

The influence of roads on the fine-scale population genetic structure of the dengue vectorAedes aegypti(Linnaeus)

“…Studies in MRR of Ae. aegypti demonstrated that the dispersal of this mosquito vector could be influenced by the type of road [16][17]. Ae.…”

“…Ae. aegypti prefer crossing smaller and quieter roads as compared to larger and busy roads [16][17]. To date, the only study that investigated the effect of road such as highway on Ae.…”