Collection of drosophilids from the Font Groga site, Barcelona (Spain)

Abstract

Following a series of studies, another collection of drosophilids was obtained from Font Groga (Barcelona) on 6th October 2014. The detailed description of this site can be found in Araúz et al. (2009) and samples have been obtained in previous years (Canals et al., 2013; Pineda et al., 2014). A total of 12 baits containing fermenting bananas placed along a trail were used for attracting flies, and they were sampled by nets. Individuals were collected from 4 to 7 pm. It is worth to compare these data with those from the previous samples of 2012 (Canals et al., 2013) and 2013 (Pineda et al., 2014). In the present collection, the most abundant species is the melano/simulans group (38.94%), increasing with regard to last year (25.21%), but far from the percentage of 2012 sample (81.01%). In 2014, D. subobscura represents 30.53%, approximately half of the percentage detected in 2013 (62.60%), but clearly higher than that of 2012 (6.85%). The invasive species D. suzukii has increased reaching the 20.35%, clearly over the 7.98% (2013) and 9.20% (2012). This species seems to be well adapted to the Font Groga habitat. Finally, we have estimated both the H' (Shannon diversity index) and J (Shannon uniformity index). The values obtained were 1.36 and 0.76, respectively. They are similar, but higher than those from 2012 and 2013 samples [...].