Diversidade de formigas (Hymenoptera, Formicidae) em praças urbanas de Juiz de Fora, MG

Abstract

The survey about ant’s fauna have been realized frequently in fragments of forest and domestic backyground. There are few studies about the frequence of these insects in urban squares. The present study has the intention to realize a survey of ants who liven in urban squares in the town of Juiz de Fora (21°41’’20’ South e 43°20’’40’ North), MG, Brasil. The survey hapnned between November of 2005 and june of 2006, totalize 36 collections. Had been found 82 species of ants who belong to 27 genera and six subfamilies. The subfamilie Mymicinae was the most various, totalize 33 species (40.24%) followed by Ponerinae with 17 species (20.73%) and Formicinae with 15 species (19.29%). Between the most found species, the most frequent was Wasmannia auropuncata, found in 100% in the collections followed by Linepithema humile, Camponotus crassus and Pheidole megacephala. The most efficient method to collect ant species was the active search that collected, 92,12% of the species that were found. This method enables the great various of species, probably of because it is being find were related with the size of green areas. The present ants in these backyground were not different in their diversity between the two seasons of the year considered in these study (hot and rainy and cold and dry).

xiii Except one square it could be related with the fact that some species registered in the backyground are classifying in opportunists.