Health & Environmental Research Online (HERO)


Print Feedback Export to File
3354204 
Journal Article 
The extracellular mineral concretions in Anodonta cygnea (L.): Different types and manganese exposure-caused changes 
Moura, G; Guedes, R; Machado, J 
1999 
1 
Journal of Shellfish Research
ISSN: 0730-8000
EISSN: 1943-6319 
18 
2 
645-650 
English 
WOS:000084906000038 
The mantle and gill extracellular mineral concretions of normal unpolluted and manganese-incubated specimens of the freshwater mussel, Anodonta cygnea (L.), were studied for their elementary composition and morphology. The mineral concretions of the gills, as well as those analyzed on the haemolymph side of the intrapallial epithelium, revealed a phosphate nature, bring related to manganese accumulation. On the contrary, mineral formations located on the haemolymph side of the extrapallial epithelium are mainly built of carbonate salts, probably being more related to the shell biomineralization process than to the toxic metal detoxification. The concretions also differ markedly in their morphological aspects, with the phosphate formations being spherical, and the carbonate formations quite irregularly shaped. 
biomineralization; detoxification; concretion; manganese; METAL-ACCUMULATING CELLS; WATER UNIONID MUSSELS; ACID-BASE; CALCIUM; CONCRETIONS; RECOVERY; LINNAEUS; TISSUES; BALANCE