Comunidade de cigarrinhas (Hemiptera: Auchenorrhyncha) de uma área de campo do município de Viamão, Rio Grande do Sul, Brasil

Mosquitoes in degraded and preserved areas of the Atlantic Forest and potential for vector-borne disease risk in the municipality of São Paulo, Brazil

“…The classification established by Ott and Carvalho (2001) was applied to determine species dominance, using the formula D%= (i/t) × 100, where i = number of individuals of a same species and t = number of individuals captured. According to the D values obtained, five dominance classes were established: eudominant (over 10%), dominant (5 to 10%), subdominant (2 to 5%), recedent (1 – 2%), and subrecedent (under 1%).…”

Ecological aspects of mosquitoes (Diptera: Culicidae) in an Atlantic forest area on the north coast of Rio Grande do Sul State, Brazil

“…Those indexes were obtained using the program PAST, version 1.88 (Hammer and Harper 2009). To determine categories of dominance, we used the classification established by Ott and Carvalho (2001), where D%= (i / t).100, where i = total of individuals of the species and t = total of individuals collected, where D>10% Eudominant, D>5–10% Dominant, D>2–5% Subdominant, D>1–2% Eventual, and D<1% Rare. The species constancy during the sampling was assessed by the formula C%= (p / N).100, where p = number of sampling occasions where the species was present; N = total number of collections performed.…”

“…The species constancy during the sampling was assessed by the formula C%= (p / N).100, where p = number of sampling occasions where the species was present; N = total number of collections performed. Then, they were grouped in constancy categories, in which C>50% were considered Constant; C>25–50% Accessory, and C<25% Accidental (Ott and Carvalho 2001). To verify the sampling sufficiency, we used the species accumulation curve and the richness estimators of Chao 1, Jackknife 1, Bootstrap, and Michaelis‐Menten, with 100 randomizations, using the software StimateS, version 8.2.0 (Colwell 2009).…”

Abundância e sazonalidade de cigarrinhas (Hemiptera, Cicadellidae, Cicadellinae) em vegetação herbácea de pomar de laranja doce, no município de Montenegro, Estado do Rio Grande do Sul, Brasil

“…Sabidamente o efeito das mudanças climáticas sobre a dinâmica populacional de insetos, sobretudo a pluviosidade, pode ter efeito negativo nestas populações, em especial sobre os fitófagos (OTTE & JOERN, 1975;POLLARD, 1984;WALLNER, 1987). A influência da pluviosidade sobre populações de auquenorrincos foi discutida por OTT & CARVALHO (2001), que atribuíram o reduzido número de cigarrinhas coletadas com a mesma metodologia no outono em ecossistema de campos nativos ao baixo índice pluviométrico registrado neste período. BOINSKY & FOWLER (1989) constataram o menor número de "homópteros" capturados com rede-devarredura no final da temporada de chuvas, onde a pluviosidade registrada no período foi superior à média normal do período.…”