Induction of cadmium tolerance in two clones of Daphnia magna straus

Freshwater Decapods and Pesticides: An Unavoidable Relation in the Modern World

“…In this case, an individual organism that becomes exposed to a specific contaminant may be less severely affected by this contaminant if it had been previously exposed to it. This effect is generally the result of the induction of a detoxification mechanism, as cytochrome P450, in response to the initial exposure (Tang & Garside, 1987;Stuhlbacher et al, 1992). Klerks (1999) observed (in the shrimp, Palaemonetes pugio) that acclimation results in an increased resistance at only a limited range of concentrations, with generally no change in resistance at lower pre-exposure levels and a decreased resistance at higher pre-exposure concentrations that are stressful or result in a significant increase in contaminant body burdens.…”

Mechanisms underlying recovery of zooplankton in Lake Orta after liming

“…2;Calderoni and Tartari, 2001). The tolerance to toxicants can vary greatly between zooplankton species and among clones within species (Stuhlbacher et al, 1992;Soares et al, 1992;Barata et al, 2002), but many studies confirm that the metal levels in Lake Orta were high enough to be toxic in the earlier part of our record. for rotifer Brachionus plicatilis, while Bossuyt and Jansen (2005) reported a value of 22.6 µg L -1 for D. galeata inhabiting Lake Leuven, confirming the toxicity of Lake Orta waters.…”

Multigenerational contaminant exposures produce non-monotonic, transgenerational responses in Daphnia magna

“…Many single-and several multi-generational studies have been conducted on the effects of metals on life history traits and changes in tolerance to novel stressors in D. magna (Biesinger and Christensen, 1972;Lopes et al, 2004;Stuhlbacher et al, 1992;Münzinger and Monicelli, 1992;Guan and Wang, 2006). LeBlanc (1982) demonstrated that the progeny of D. magna exposed to copper had higher survival rates than those progeny from unexposed parents.…”