Mosquito breeding sources in Qalyubiya Governorate, Egypt

Abstract

Water collections which may provide breeding habitats for mosquitoes in Qalyubiya Governorate were surveyed throughout the period from April 2009 to March 2011. Mosquito larvae were collected on monthly basis from 14 different breeding places in eight villages. A total of 1800 from 2821 sites (63.8%) were found positive for mosquitoes, including 312 canals, 271 pools, 191 unused wells, 166 rice fields, 142 irrigation channels, 130 ponds, 128 drainages, 115 catch basins, 85 irrigation basins, 82 ditches, 70 swamps, 66 temporary pools, 22 unused tires and 20 irrigation drainage tubes. Mosquito larvae were found in a variety of water collections including temporary, permanent, natural or man-made habitats. Permanent and semipermanent water collections were the main sites for mosquito breeding. Nine mosquito species were identified in the study area namely, Culex pipiens 64.7%, Culiseta longiareolata 13.5%, Cx. antennatus 8.8%, Aedes caspius 6.3%, Cx. vagans 2.5%, Cx. decens 1.9%, Cx. perexiguus 0.9%, Cx. univittatus 0.8% and Anopheles multicolor 0.6%. Simple and Multiple regression models showed that temperature, Ammonia and Nitrate were the best predictors for mosquito larval density (P = 0.0397), (P = 0.0241) and (P = 0.0040), respectively. The year-round presence of immature mosquitoes indicates that climatic conditions of the area are not limiting to the development of most prevailing mosquito species. Catch basins, unused wells and drainages are playing the major role in mosquito problem in Qalyubiya Governorate.

Correlation between mosquito larval density and their habitat physicochemical characteristics in Mazandaran Province, northern Iran

“…In contrast with our research, no significant relationship was found between the abundance of the genera Anopheles , Culex and Aedes (formerly Ochlerotatus ) with physicochemical and microbial parameters in Qom Province (central) and Bashagard district, southern Iran [ 19 , 21 ] and Egypt [ 7 ].…”

“…As discussed, some of the data presented in others studies are in agreement [ 1 , 4 , 7 , 9 ] and some in contradiction [ 21 ] with the results of the present study which could be due to biological characteristics of different species that show different levels of tolerance to physicochemical factors.…”

“…univittatus , An . multicolor and temperature, pH and nitrate [ 7 , 8 ]; An . arabiensis and turbidity [ 17 ]; An .…”

“…univittatus , An . multicolor are directly correlated with temperature, ammonia, nitrate, pH, dissolved oxygen and salinity [ 7 , 8 ]; An . culicifacies with temperature and dissolved oxygen [ 1 , 9 ]; Ae .…”

Mosquitoe’s Larval Growth With Reference to Water Parameters in Ukkadam Periyakulam Lake- Coimbatore, Tamilnadu, India

“…Observed few anopheles species abundance to dissolved oxygen. Ibrahim AA,El-Monairy OM, El-Sayed, (2011).found that the temperature ,ammonia,and nitrogen are the best predictor for larval density. However no correlation was found between larval density, PH, and dissolved oxygen.…”