Abstract
The purpose of this work was to describe the population patterns of Anastrepha in three municipalities of the state of Roraima, Brazil, via faunistic analysis. Weekly collections were performed from January through December 2008, using McPhail traps containing 5% hydrolysed protein, in domestic orchards in the municipalities of Boa Vista, Bonfim and Pacaraima. We captured 301 females of Anastrepha in Boa Vista, 212 in Bonfim, and 167 in Pacaraima. Boa Vista presented the highest species richness (S = 10) and Pacaraima the lowest (S = 4). Anastrepha striata was the predominant species in Boa Vista (47.18%) and Pacaraima (65.87%), whereas A. obliqua predominated in Bonfim (46.23%). Boa Vista presented the highest Shannon-Wiener diversity index (H' = 1.19) and Margalef index (α = 1.58), and Bonfim presented the highest Pielou's evenness index (J' = 0.69). In Pacaraima the cumulative curves reached stability, confirming that the observed and expected species richness were the same. In the other two municipalities, the curves showed a moderate growth, suggesting that the sampling effort was not sufficient to produce an accurate depiction of species richness. In this study, Anastrepha zernyi is reported for the first time in Roraima.
Highlights
The state of Roraima is located in the extreme north of the Brazilian Amazon, bordering Venezuela, Guyana, and the Brazilian states of Amazonas and Pará
Very few faunistic analyses have been completed on the diversity and species richness of fruit flies in the Brazilian Amazon
The literature on faunistic analysis of fruit flies is scarce and limited to studies conducted in Brazil, most notably those by Canal et al (1998) in the state of Minas Gerais; Garcia and Corseuil (1998) in the state of Rio Grande do Sul; UchôaFernandes et al (2003) in the center of Mato Grosso do Sul state; Garcia et al (2003) and Alberti et al (2009) in the state of Santa Catarina; Canesin and Uchôa-Fernandes (2007) in the south of the state of Mato Grosso do Sul; Aguiar-Menezes et al (2008) in the state of Rio de Janeiro and Dutra et al (2009) in the state of Bahia
Summary
The state of Roraima is located in the extreme north of the Brazilian Amazon, bordering Venezuela, Guyana, and the Brazilian states of Amazonas and Pará. The first studies on Anastrepha species in Roraima began in the 1990s with Rafael (1991) and Ronchi-Teles et al (1995), who added new information on the species richness of Anastrepha in the state (Marsaro Júnior et al, 2011). Seventeen species of Anastrepha have been reported in the region up to the present time and six species of parasitoids have been reported in Roraima, namely five Braconidae and one Figitidae (Marsaro Júnior et al, 2011). No faunistic analyses have been completed in Roraima as yet. Very few faunistic analyses have been completed on the diversity and species richness of fruit flies in the Brazilian Amazon. The literature on faunistic analysis of fruit flies is scarce and limited to studies conducted in Brazil, most notably those by Canal et al (1998) in the state of Minas Gerais; Garcia and Corseuil (1998) in the state of Rio Grande do Sul; UchôaFernandes et al (2003) in the center of Mato Grosso do Sul state; Garcia et al (2003) and Alberti et al (2009) in the state of Santa Catarina; Canesin and Uchôa-Fernandes (2007) in the south of the state of Mato Grosso do Sul; Aguiar-Menezes et al (2008) in the state of Rio de Janeiro and Dutra et al (2009) in the state of Bahia
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