Abstract

CERESOLI, Natalia  and  GAGNETEN, Ana María. Efectos del efluente de curtiembre sobre ceriodaphnia dubia (crustacea, cladocera) en condiciones experimentales. INCI [online]. 2003, vol.28, n.8, pp.469-475. ISSN 0378-1844.

The aim of this study was to assess empirically the effects of several concentrations of tannery waste water with a high content of Cr and sulphide on the life history attributes and population parameters of Ceriodaphnia dubia Richard 1894 (Crustacea, Cladocera) in chronic bioessays. The effluent significantly affected survival, fecundity, number of molts and broods of C. dubia. The time between broods and the age of the first reproduction was delayed by the increase of the effluent concentration, producing no broods in concentrations >1ml·l-1. R0 was <1 in effluent concentrations >0.6ml·l-1, which defined the highest limiting concentration that allows the establishment and development of zooplankton populations in the environment. The importance of the use of species with broad distribution and the use of integrative population parameters in ecotoxicological surveys are pointed out. The importance of the development of bioessays with complex effluents is discussed.

Keywords : Bioensayos crónicos ; Ceriodaphnia dubia ; Curtiembre ; Efluente de Curtiembre ; Ecotoxicología .