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Magnesium and the regulation of lead in three populations of the garden snail Cantareus aspersus
- Source :
- Environmental Pollution. 158:2288-2293
- Publication Year :
- 2010
- Publisher :
- Elsevier BV, 2010.
-
Abstract
- Helicid snails appear to regulate Pb more closely than other toxic metals, though it is reported as the least toxic. No regulatory mechanism has been described in animals, and the possible role of Mg in limiting Pb assimilation is examined here for the first time. Three populations of Cantareus aspersus were fed Pb and Ca with three levels of Mg for up to 64 days. Metal assimilation and production efficiency was calculated for each of 108 snails. Populations differed in their pattern of uptake but soft tissue Pb was unaffected by dietary Mg. The proportion of Pb assimilated did not change as soft tissue concentrations increased, indicating no specific regulatory mechanism. The daily addition of Pb to the soft tissues increases with growth rate suggesting uptake is instead some function of growth or cell turnover. Bioconcentration factors varied with time and are unreliable indicators of an evolved regulatory mechanism for Pb.
- Subjects :
- Cantareus aspersus
Dose-Response Relationship, Drug
Magnesium
Helix, Snails
Health, Toxicology and Mutagenesis
chemistry.chemical_element
Zoology
Bioconcentration
Assimilation (biology)
Feeding Behavior
General Medicine
Calcium
Biology
Toxicology
Pollution
Dose–response relationship
Lead
chemistry
Environmental chemistry
Toxicity
Garden Snail
Animals
Soil Pollutants
Tissue Distribution
Subjects
Details
- ISSN :
- 02697491
- Volume :
- 158
- Database :
- OpenAIRE
- Journal :
- Environmental Pollution
- Accession number :
- edsair.doi.dedup.....ba5b67d27632ce74c11ca39d95069177