Abundance and aggregation egg of Aedes aegypti L. and Aedes albopictus (Skuse) (Diptera: Culicidae) in the north and northwest of the state of Parana, Brazil

The abundance and aggregation of eggs of Aedes aegypti L. and Aedes albopictus Skuse was evaluated in the municipalities of Cambe, Ibipora, Jacarezinho, Maringa and Paranavai, in the State of Parana, Brazil by means of oviposition traps. Of the 225 installed traps, 100 were registered as positive for eggs; 4140 eggs were collected, thus demonstrating an highly aggregate distribution. Both species were registered in Cambe, Jacarezinho, Maringa and Paranavai. Ae. albopictus was generally less abundant and was not present in Ibipora nor in the oviposition traps of a second collection of Maringa. The relation between sexes for Ae. aegypti was approximately 1:1. In the comparison of the number of adults collected between the two species, a negative correlation was obtained in the samples of Maringa and Cambe, what was attributed the seasonality of these populations. The coexistence of these species indicates that both are under pressure by the control programs, therefore specific evaluations are necessary.