LABORATORY EVALUATION OF THE DEVELOPMENT OF Aedes aegypti IN TWO SEASONS: INFLUENCE OF DIFFERENT PLACES AND DIFFERENT DENSITIES

Abstract

Aedes aegypti is an important vector in Brazil being the main vector of the dengue-fever. This paper employs survival curves to describe the time in days from larvae to adult forms of Aedes aegypti raised, individually and collectively, and compares it during winter and spring when positioned inside and outside a laboratory. The study was conducted in São Vicente, a coastal city in Southeastern Brazil. The lowest water temperature in winter and in spring was 20 °C and the highest was 26 °C in spring. Higher and more stable temperatures were measured in the intra compared to the peri in both seasons. Consequently, larvae positioned in the intra resulted in the lowest median time to develop in the individual and collective experiment (nine and ten days, respectively). At least 25% of the larvae positioned in the intra in the individual experiment in the spring took only seven days to reach adulthood. Sex ratios and the median time development by sex did not show significant differences. These results indicate that efforts to control Aedes aegypti must be continuous and directed mainly to prevent the intra-domiciliary sites that can be infested in a week in order to reduce the human-vector contact.

Nutritional Quality during Development Alters Insulin-Like Peptides Expression and Physiology of the Adult Yellow Fever Mosquito, <em>Aedes aegypti</em>

“…The protein-rich diet fed larvae completed their development to pupae in 7-8 days, which is standard in our laboratory and other laboratories [15]. However, the carbohydrate-rich diet fed larvae showed delayed development.…”

Arbovirus Vectors of Epidemiological Concern in the Americas: A Scoping Review of Entomological Studies on Zika, Dengue and Chikungunya Virus Vectors

“…aegypti male fitness and found it to be positively related to larger body size and greater swarming activity in adults. Lopes et al [60] found no effect of isolation on survival and development of Ae. aegypti under typical seasonal conditions in Brazil.…”

“…Several main conclusions can be drawn from the existing literature. Firstly, temperature and humidity have a significant impact on mosquito distribution and dynamics [18–20,22,24], development of immatures [42,43,43,57,58,60], and arboviral infection rates. Minimum temperature in particular appears to have a large impact on mosquito dynamics, including oviposition [36,42] and survival [43].…”

Chemical Control of Aedes Aegypti: A Review on Effects on the Environment and Human Health

“…A laying of eggs is performed above water level and their breeding grounds can be artificial, such as flower pots, tires, cans or any container that contains water, or natural such as, bamboos, bromeliads, fallen leaves, etc. Due to the need of water for development, the population of these insects varies during the year, increasing the density in the presence of rains and high temperatures and reducing the dry season and lower temperatures (LOPES et al, 2014). In this way the eggs of these mosquitoes are resistant to desiccation, remaining viable within a period of more than a year, and hatching with contact with water (CONSOLI and OLIVEIRA, 1994).…”