[Trophic niches in calyptrate Diptera in Rio de Janeiro, RJ].
Niche breadth and niche overlap of flies were estimated. The flies were breeding in different environments in Rio de Janerio (rural, urban and forest). It were used as a larvae substrate: banana mashed, mouse carcass, fish (sardine), bovine liver, shrimp and fresh human faeces. It were bred 14,294 flies, belonging to four families: Calliphoridae, Fanniidae, Muscidae and Sarcophagidae. The greater niche overlap values observed were: rural area: Phaenicia cuprina versus Chrysomya megacephala; urban area: Phaenicia eximia versus Sarcodexia innota and P. eximia versus Synthesiomyia nudiseta; forest area: P. eximia versus Hemilucilia flavifacies. The greater niche breadth recorded were: rural area: Peckia chrysostoma; urban area: S. nudiseta and Musca domestica; forest area: Euboettcheria collusor and P. eximia.