Abstract
The role of different bait types and trap installation heights for an accurate trapping of flower chafer beetles (Coleoptera: Cetoniidae) is still poorly understand worldwide, especially in the Neotropical region. Therefore, in this study, we evaluated how the type of bait and trap installation height can influence flower chafer beetle sampling in the Amazon rainforest. For this, we sampled flower chafer beetles monthly from June to December 2019 in five Amazon forest fragments, in Juína, Mato Grosso, Brazil. In each collecting fragment, we installed aerial traps at different heights (i.e., 1.5, 4.5, 7.5, and 10.5 m above ground) and randomly baited with 300 ml of each of the following bait types: banana + sugarcane juice mixture; pineapple + sugarcane juice mixture; beer; or red wine. We collected 412 individuals belonging to 12 species of Cetoniidae beetles. Traps baited with pineapple + sugarcane juice mixture captured greater abundance and species richness of flower chafer beetles. Moreover, traps at 4.5, 7.5, and 10.5 m caught a similar number of individuals and species, and significantly more than traps at 1.5 m. Thus, our results provide evidence that for an accurate sampling of flower chafer beetle assemblages in tropical forests, traps baited preferably with a ripe fruit (e.g., pineapple) and sugarcane juice mixture should are installed at least 4.5 m above ground.
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