PMID: 11924550Apr 2, 2002Paper

Tolerance and acclimation to zinc of Ceriodaphnia dubia

Environmental Pollution
B T A Muyssen, C R Janssen

Abstract

Zinc is an essential metal for all living organisms. However, so far, little or no attention has been paid to the consequences of zinc deficiency or acclimation to this metal during culturing and testing on toxicity test results. In this study, the cladoceran Ceriodaphnia dubia was acclimated for 10 generations to four zinc concentrations ranging from 0 to 100 microg Zn/l and changes in zinc tolerance were monitored using acute (48 h) and chronic (9 days) assays. C. dubia deprived of zinc and acclimated to 13 microg Zn/l had a lower fitness in comparison with organisms acclimated to 50 and 100 microg Zn/l. In the two lowest versus the two highest acclimation concentrations the 9dEC50 values (on immobility) were 358-387 microg Zn/l versus 486-489 microg Zn/l; the mean number of young per female was 11-18 versus 25-32; and the time to first brood was 4.7-5.0 days versus 4.0-4.3 days. Moreover, the coefficient of variation of all parameters tested was highest in the two lowest acclimation concentrations. The results indicate that culturing test animals in media lacking trace metals such as zinc could give rise to animals that are unnaturally sensitive to those same metals daring toxicity tests.

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Citations

Oct 10, 2008·Ecotoxicology and Environmental Safety·Kevin W H KwokKenneth M Y Leung
Apr 28, 2006·Integrated Environmental Assessment and Management·Charles W M BodarDick T H M Sijm
Jun 9, 2004·Environmental Pollution·Brita T A Muyssen, Colin R Janssen
Apr 6, 2005·Environmental Pollution·Bart T A Bossuyt, Colin R Janssen
Apr 11, 2015·Bulletin of Environmental Contamination and Toxicology·Giada BiniGuido Chelazzi
Jan 21, 2018·Environmental Toxicology and Chemistry·Joy A McGrathKlaas den Haan
Apr 21, 2005·Environmental Toxicology and Chemistry·Brita T A Muyssen, Colin R Janssen
Nov 10, 2017·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Antoine GossetChristine Bazin

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