Bioconcentración y transferencia trófica del Cromo en el sistema Daphnia magna (CRUSTACEA, CLADOCERA) -Cnesterodon decemmaculatus (PISCES, POECILIIDAE)

GUTIERREZ, M. FLORENCIA; GAGNETEN, ANA MARÍA; PARMA, MARÍA JULIETA

Fresenius Environmental Bulletin

PSP - Parlar Scientific Publications

Año: 2008 vol. 17 p. 647 - 651

Cr(VI) trophic transfer was analyzed in a primary and a secondary consumer: Daphnia magna and Cnesterodon decemmaculatus. Three static experimental assays were carried out using two sublethal Cr(VI) concentrations (100 and 300 µg Cr(VI)/L), and a control (without added Cr). The Bioconcentration Factor was calculated for D. magna and the D. magna-C. decemmaculatus system. The results showed a significant toxic effect of Cr(VI) on D. magna when bioaccumulated from water, and on C. decemmaculatus when incorporated by the trophic tansfer. The obtained results constitute a great contribution to the knowledge of Cr(VI) trophic transfer, and provide a valid tool for bio-monitoring studies.