Diversity of Culicidae during the crepuscular periods in Atlantic Forest blome and parity of Anopheles cruzii (Diptera: Culicidae)

The aim of this investigation was to know the diversity and abundance of Culicidae associating with the climatic factors and obtaining the parity of Anopheles cruzii Dyar a Knab, 1908. The study was developed in a dense rain forest in Atlantic Forest, located in the State of the Parani, named of Palmito State Park. The captures were performed two days in a month, during December 2006 to March 2007, occurring in the matutine and vespertine crepuscular periods. The captures were executed before twilight until after twilight. Twenty five species that belong to Culicidae were identified, the tree most abundant species were Anopheles cruzii (65.2%), Culex sachettae Sirivanakarn & Jacob, 1982 (11.2%) e Anopheles bellator Dyar & Knab, 1906 (8.5%). According to variance analysis, significant difference in frequency, was detected between crepuscular periods, for the following species: Aedes scapularis (Rondone, 1848) (p = 0.03651), Coquillettidia chrysonotum (Peryassu, 1922) (p = 0.00795), Mansonia fonsecai (Pinto, 1932) (p = 0.00804), e Runchomyia theobaldi Lane & Cerqueira, 1934. (p = 0.01996). The tree most captured species didn't show a significant correlation. to the climatic factors. The rate parity of Anopheles cruzii was 48%. Didn't have correlation between the abundance with the rate parity. The twilight influences the behavior of Culicidae species. The similarity comparison between matutine and vespertine crepuscular periods revealed an elevated resemblance in the specific composition. A cruzii was dominant specie in the crepuscular periods. The diversity in the crepuscular periods was considered decrease.