Daily and seasonal variation in the activity of potential vector mosquitoes

Abstract

In the course of season 2010 (May–September), three 2-day trappings of female mosquitoes were carried out at two sites in order to determine the daily activity of the common mosquito species (e.g. species from genus Culex, Aedes, Ochlerotatus, Anopheles, etc.) in the area. CDC light traps filled with CO2 and placed at a height of 1 m were used to trap individuals, and were sampled every 2 h. A total of 19,604 female mosquitoes from 20 identifiable species were trapped: 7,549 at Sedlec and 12,055 at Kančí obora. The activity of the major species of mosquitoes in South Moravia differed throughout the course of the day. Calamity species of the genus Aedes and Ochlerotatus remained active throughout the day and night, but with different course. Aedes vexans, Ae. cinereus, and Ae. rossicus were most active in the late afternoon and highly active for most of the night. Ochlerotatus sticticus was captured most often in the afternoon, and its abundance decreased rapidly before sunset. The activity of Oc. cantans s.l. (Oc. cantans + Oc. annulipes) females varied little during the day and night. The daily activity for the main vectors of West Nile virus, Culex pipiens and Cx. modestus, were totally different from that of other species. Cx. pipiens females showed significant night activity, while Cx. modestus was most active in the evening. Nighttime activity was also observed in female mosquitoes of the genus Anopheles.

Diversity, distribution, abundance, and feeding pattern of tropical ornithophilic mosquitoes

“…Further, Pearson correlation analysis was performed separately for each studied habitat to check the relationship between weather parameters [monthly average temperature (T m ), monthly average rainfall (R m ), and monthly average humidity (H m )] and the total abundance of ornithophilic mosquitoes. Seasonal variations in relative abundance of most commonly reported species at selected habitats were assessed separately by one‐way ANOVA test and their prevalence was identified using five dominance categories: eudominant (ED) (more than 10%), dominant (D) (5–10%), subdominant (SD) (2–5%), recedent (R) (1–2%) and subrecedent (SR) (less than 1%), based on total number of mosquitoes confined per sampling month as described by Sebesta et al (). Statistical analyses were carried out using MINITAB 14 statistical software.…”

Screening of mosquitoes for filarioid helminths in urban areas in south western Poland—common patterns in European Setaria tundra xenomonitoring studies

“…In our study, sampling mosquitoes for diurnal rhythm analysis was performed on a single day; however, similar results of high incidence and daily rhythm of Ae . vexans have been presented by Šebesta et al ( 2011 ) in southern Moravia. To summarize, there were slight differences in the diurnal activity of Aedes and Culex species; however, those were too small to be a convincing explanation of the lack of S. tundra infections in Culex mosquitoes.…”

“…Warm summers improve transmission and genesis of disease outbreaks by favoring the development of filarioid helminths in their mosquito vectors (Genchi et al 2009 ; Laaksonen et al 2009 ). Diurnal activity of the mosquito species of medical and veterinary importance was monitored in many regions of Europe such as Croatia, the Czech Republic, France, and Sweden (Merdič and Boca 2004 ; Šebesta et al 2011 ; Ponçon et al 2007 ; Jaenson 1988 ). Precise knowledge of the relative abundance and phenology of the relevant mosquito species is essential for establishing the biology and the ecology of mosquito-borne filarial parasites.…”

Seasonal dynamics of mosquito occurrence in the Lower Dyje River Basin at the Czech-Slovak-Austrian border

“…Mosquito activity rapidly decreases in the second half of October, when cooling frequently occurs and some days temperatures even drop below the freezing Downloaded by [University of Colorado -Health Science Library] at 23:38 30 March 2015 In relation to expected changes in climate and related increased incidence of extreme conditions (Kyselý 2009(Kyselý , 2010, the weather's influence upon the occurrence of mosquitoes is becoming a focal point of interest. Considerable differences in mosquito occurrence were also recorded between , 2010and 2011; Tables III-V) and were caused mainly by different amounts of precipitation, its distribution through the year, and the related flow rates of rivers.…”