Co-Infestation and Spatial Distribution ofBactrocera carambolaeandAnastrephaspp. (Diptera: Tephritidae) in Common Guava in the Eastern Amazon

Abstract

Field infestation and spatial distribution of introduced Bactrocera carambolae Drew and Hancock and native species of Anastrepha in common guavas [Psidium guajava (L.)] were investigated in the eastern Amazon. Fruit sampling was carried out in the municipalities of Calçoene and Oiapoque in the state of Amapá, Brazil. The frequency distribution of larvae in fruit was fitted to the negative binomial distribution. Anastrepha striata was more abundant in both sampled areas in comparison to Anastrepha fraterculus (Wiedemann) and B. carambolae. The frequency distribution analysis of adults revealed an aggregated pattern for B. carambolae as well as for A. fraterculus and Anastrepha striata Schiner, described by the negative binomial distribution. Although the populations of Anastrepha spp. may have suffered some impact due to the presence of B. carambolae, the results are still not robust enough to indicate effective reduction in the abundance of Anastrepha spp. caused by B. carambolae in a general sense. The high degree of aggregation observed for both species suggests interspecific co-occurrence with the simultaneous presence of both species in the analysed fruit. Moreover, a significant fraction of uninfested guavas also indicated absence of competitive displacement.

Co-Existence of <i>Bactrocera dorsalis</i> Hendel (Diptera: Tephritidae) and <i>Ceratitis cosyra</i> Walker (Diptera: Tephritidae) in the Mango Orchards in Western Burkina Faso

“…During this study, several mango fruits were infested by both species (B. dorsalis and C. cosyra). Recent studies have reported the co-infestation of guava (Psidium guajava) with an introduced species Bactrocera carambolae and native species of the genus Anastrepha in Brazil [11] and Ceratitis capitata (introduced species) and Anastrepha fraterculus (native species) in Argentina [8] [12].…”

Overlapping and co-occurrence pattern of Anastrepha species (Diptera, Tephritidae) in anthropic areas

“…Aggregations among A. fraterculus, A. striata and Bactrocera carambolae were recently observed in guava in eastern Amazonia. These interactions followed a negative binomial distribution pattern, suggesting that the species coexist in that region (DEUS et al, 2016).…”

“…Studies of the interactions of Anastrepha species in their niches have generally been neglected and have only recently been carried out in Brazil (LOPES et al, 2015;DEUS et al, 2016). In general, studies on the population dynamics of fruit lies are related to faunal analyses and without regard to interspeciic competition.…”

Coexistence between two fruit fly species is supported by the different strength of intra‐ and interspecific competition

“…Tilman (1994) proposed that coexistence of species is favoured by environmental disturbance if it empties (at least partially) the niche, or even generates new niches. Biological invasions can lead to the displacement of the indigenous species, or, alternatively, to a stable coexistence of the involved species under tolerable levels of competition (Human & Gordon, 1996;Juliano, 1998;Amarasekare, 2002;Braks et al, 2004;Duyck et al, 2007;Perdereau et al, 2011;Deus et al, 2016). Interspecific competition derived from situations in which a new species is introduced is not uncommon (Fitt, 1989;Duyck et al, 2004Duyck et al, , 2006.…”

“…Interspecific competition derived from situations in which a new species is introduced is not uncommon (Fitt, 1989;Duyck et al, 2004Duyck et al, , 2006. Biological invasions can lead to the displacement of the indigenous species, or, alternatively, to a stable coexistence of the involved species under tolerable levels of competition (Human & Gordon, 1996;Juliano, 1998;Amarasekare, 2002;Braks et al, 2004;Duyck et al, 2007;Perdereau et al, 2011;Deus et al, 2016).…”