[Abundance and aggregation egg of Aedes aegypti L. and Aedes albopictus (Skuse) (Diptera: Culicidae) in the north and northwest of the State of Paraná, Brazil]. / Abundância e agregação de ovos de Aedes aegypti L. e Aedes albopictus (Skuse) (Diptera: Culicidae) no norte e noroeste do Paraná

ABSTRACT

The abundance and aggregation of eggs of Aedes aegypti L. and Aedes albopictus Skuse was evaluated in the municipalities of Cambé, Ibiporã, Jacarezinho, Maringá and Paranavaí, in the State of Paraná, 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 Cambé, Jacarezinho, Maringá and Paranavaí. Ae. albopictus was generally less abundant and was not present in Ibiporã nor in the oviposition traps of a second collection of Maringá. The relation between sexes for Ae. aegypti was approximately 11. In the comparison of the number of adults collected between the two species, a negative correlation was obtained in the samples of Maringá and Cambé, 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.