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Life cycle and secondary production of two species of Campsurus (Ephemeroptera, Polymitarcyidae) in reservoirs of southeastern Brazil

ABSTRACT The aim of this paper was to study the life cycle, the annual secondary production, and the spatial and temporal variation of the species Campsurus truncatus and C. violaceus in two reservoirs in Minas Gerais, Brazil. Campsurus truncatus was recorded in 11 months and had a multivoltine lifecycle with a secondary production of 4.61 g.m−2.year−1. Campsurus violaceus was collected in eight months and had a bivoltine lifecycle with a secondary productivity of 1.96 g.m−2.year−1.