Effects of Cd on the Ca Metabolism of Freshwater Mussels
GRIN Verlag, 2008 - 112 pages
Diploma Thesis from the year 2005 in the subject Environmental Sciences, grade: 1,0, University of Bayreuth, 61 entries in the bibliography, language: English, abstract: To achieve a better understanding of how cadmium interferes with the calcium metabolism of freshwater mussels, four cadmium exposure experiments were performed with the freshwater clam Anodonta cygnea. Separate experimental groups were treated with vitamin D3 and SEA0400 (a selective inhibitor of sodium-calcium exchangers) to compare the effects cadmium has with those of other substances influencing the calcium metabolism. Tissue and body fluid samples taken from the animals were analysed for cadmium, calcium and other ions of physiological importance, in order to elucidate the calcium transport processes. The osmolarity of the body fluid samples was also measured.
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2h Water exchanged 2h Water partially analysed body fluids border intestine sample cadmium calcium Cd concentrations certified reference material concentrations in fluid concentrations in mussels concentrations in tissue cygnea distilled water dw 2 g dw 3 mb dw 3 mt dw 4 mb dw 4 mh exchanged mussels fed exchanged Water exchanged experiment c experiment experimental tank fed for 2h fluid samples freshwater mussels gills mantle tissue haemolymph pericardium ventricle ions kidney samples kidney tissue samples mantle border intestine mantle haemolymph pericardium mantle tissue mantle Mean Ca concentrations Measured and standardised metal mg/g dw mmol/L mosmol/L mussel sample CCd mussels from experiment mussels from tank nmol/g dw şk şk şk osmolarity pericardium ventricle sample sample CCd stand samples from experiment standardised Cd tank water test substances tissue mantle border treatment with Cd uptake vitamin D Water exchanged mussels Water exchanged Water Water partially exchanged µg/g µmol/g dw