Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 7- Behaviour of adults Nyssorhynchus anophelines with special reference to Anopheles albitarsis s.l. in South-Eastern Brazil

Abstract

Results obtained with catches performed at several sites of the Ribeira Valley, SP (Brazil) are reported. Collections with Shannon type traps showed a concentration of An.albitarsis s.l. in the Experimental Farm of Pariquera-Açu County, associated with the development of irrigated rice cultivation. Two species of the complex, named A and B, were recognized. Species B predominated in the samples. Indoor and outdoor crepuscular human bait captures were performed a the domiciliary environment. The two species showed a generally low William's media valve of 0.2, the highest value obtained was 1.6. No differences were found between indoor and outdoor behaviours between the two species of the complex.

Prevalência de Anofelinos (Diptera: Culicidae) no Crepúsculo Vespertino em Áreas da Usina Hidrelétrica de Itaipu, no Município de Guaíra, Estado do Paraná, Brasil

“…albitarsis sensu lato com isca humana e em casas localizadas no centro e fora da área urbana da cidade, tendo capturado 98,7% dos espécimes fora da área urbana, das quais 28% no intradomicílio. Forattini et al (1995) associam a ocorrência do An. albitarsis, na oportunidade considerado…”

Studies on mosquitoes (Diptera: Culicidae) and anthropic environment. 12- Host-seeking behaviour of Anopheles albitarsis s.l. in South-Eastern Brazil

“…This low density in dwellings has also been reported elsewhere in Brazil as, for example, in Rondonia State (Deane et al 2 , 1988). In earlier observations no agreement has been reported regarding the monthly abundance, a between the domiciliary environment human bait catches and those made in the rice fields by the use of the Shannon trap (Forattini et al 6 , 1995). However, in the present study covering the 1994-1995 cultivation cycle, this agreement was observed.…”

“…These studies were conducted at the same localities described by Forattini et al 3,4,6 , 1993, 1995. Outdoor and indoor adult collections were carried out in dwellings at the ES (Experimental Station) area in the BC ("Sítio Barra do Capinzal").…”

The Anopheles albitarsis complex with the recognition of Anopheles oryzalimnetes Wilkerson and Motoki, n. sp. and Anopheles janconnae Wilkerson and Sallum, n. sp. (Diptera: Culicidae)

“…oryzalimnetes n. sp showed unimodal sunset crepuscular rhythms (Forattini et al 1996). In another study carried out in the same region of the Ribeira Valley, Forattini et al (1995) observed a concentration of An. albitarsis and An.…”

“…At the same area, An. albitarsis fed on humans indoors and outdoors, at sunset and sunrise, in a domestic environment (Forattini et al 1995).…”