Biodiversidade de mosca-das-frutas do gênero Anastrepha (Diptera, Tephritidae) no campus Luiz de Queiroz, Piracicaba, São Paulo.
Biodiversity of anastrepha fruit flies (dip., tephritidae) on the luizde queirozcampus, Piracicaba, São Paulo.
This study was conducted in the Luiz de Queiroz campus of the Universidade de São Paulo, in Piracicaba, state of São Paulo. The aim of this study was to determine the number of species in the genus Anastrepha Schiner on campus, their distribution and the quantitative analysis of the population. Moreover, this study correlated populational fluctuations with biotic and abiotic factors as well as the association between host plant species and the Anastrepha species in that area. A total of 23,263 females of Anastrepha collected in MacPhail traps was examined, and 18 species belonging to nine infrageneric groups were registered. The distribution of females per trap was strongly clustered, with 5 traps (6%) capturing 50% of the total of females. Only A. fraterculus (Wiedemann) and A. obliqua (Macquart) were considered dominant species. A. fraterculus was by far the most frequent species, representing 80.2% of the total of females captured on campus, and the most constant, occurring in 98.04% of the analyzed samples. In decreasing order of frequency, A. obliqua (12.6%), A. pseudoparallela (Loew) (3.1%), and A. bistrigata Bezzi (2.1%) comprised the other major species. The remaining species showed frequency lower than 1%. The high value of the Simpson?s index (0.66) as wel as the low values of Shannon?s index (0.7521) and the equitability index (0.459) resulted from the high frequency of A. fraterculus. The populational level of Anastrepha increased from August to November with the highest peak in September. The availability of host fruit, more than climatic parameters determined most of the variation of population size in the most abundant species of Anastrepha. A total of 565 fruit samples representing at least 25 plant species from 11 families was collected in 47 capture sites. 10,290 females were identified. Of the 18 Anastrepha species captured in traps, only 6 also emerged from fruit samples: A. bistrigata Bezzi, A. fraterculus (Wiedemann), A. obliqua (Macquart), A. pseudoparallela (Loew), A. serpentina (Wiedemann) e A. sororcula Zucchi. A. fraterculus infested the greatest diversity of hosts. The preferred hosts of A. obliqua were plant species in the family Anacardiaceae. A. pseudoparallela and A. serpentina infested only species in the families Passifloraceae and Sapotaceae, respectively. A new fruit fly and host plant association was registered: A. fraterculus with Syagrus romanzoffiana (Cham.) Glassman (queen palm). The association of A. fraterculus with Manilkara zapota L. (sapodilla) was reported here for the first time in Brazil.
Advisor:Roberto Antonio Zucchi; Adalton Raga; Sinval Silveira Neto; Roberto Antonio Zucchi
School:Universidade de São Paulo
Source Type:Master's Thesis
Date of Publication:07/12/2002