Abstract
Calliphoridae and Mesembrinellidae include Diptera species that are good indicators of changes in forest environments. The present work aimed to inventory the Calliphoridae and Mesembrinellidae in Ilha Grande National Park and correlate the abundance of these organisms with environmental variables. Adult dipterans were collected during two expeditions in 2019 using two sampling methods, a Malaise trap and baited traps, distributed on two islands in the park. During the study, 1,007 individuals of 12 species of Calliphoridae and four species of Mesembrinellidae were collected. Family Calliphoridae was more abundant (97.12%). The abundance of native species showed a strong negative correlation with the abundance of the genus Chrysomya. Rodrigues Island (Island I) had higher diversity levels and no species of Chrysomya were recorded in this area, which may indicate a greater degree of environmental preservation. The results indicate that human action in natural environments can negatively impact species diversity, as found in Ilha Grande National Park that, historically, was partially occupied and is still in the process of regeneration.
Highlights
The insect family Calliphoridae (Diptera, Oestroidea) is cosmopolitan, popularly known as blowflies and comprises more than 1,500 species (PAPE et al, 2011), of which approximately 60 species occur in the neotropical region (KOSMANN et al, 2013)
The larvae of most species develop in decomposing organic matter and some species are reported to cause myiasis (GUIMARÃES; PAPAVERO, 1999)
It is common to find regionalized population fluctuations in the group (PARALUPPI; CASTELLÓN, 1994; VIANNA et al, 2004), which could indicate that biotic factors might be more decisive in relation to distribution
Summary
The insect family Calliphoridae (Diptera, Oestroidea) is cosmopolitan, popularly known as blowflies and comprises more than 1,500 species (PAPE et al, 2011), of which approximately 60 species occur in the neotropical region (KOSMANN et al, 2013). Due to the fact that immatures use decomposing organic matter, many species are extremely important for forensic entomology, since they can be used to calculate the post-mortem interval and even indicate the place of death (AMENDT et al, 2004). Calliphoridae species have different degrees of tolerance to environmental conditions and, are very affected by human impact in natural environments (SOUSA et al, 2014). From a conservation point of view, fly communities are directly affected by both environmental degradation and exotic species (CARMO; VASCONCELOS, 2016). As a result, they are excellent indicators of anthropogenic impacts, as well as indicators of forest regeneration and conservation degree (SOUSA et al, 2014)
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