Viability of glochidia of Anodonta anatina (Unionidae) exposed to selected metals and chelating agents
作者： C Hansten , M Heino , K Pynnönen
DOI: 10.1016/0166-445X(95)00013-T
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摘要: Abstract The effects of humic acid, EDTA, Fe and Mn on the toxicity Cd, Cu Zn were tested mature glochidial larvae stripped from gills Anodonta anatina. Viability was after 24, 72 144 h by observing ability to close valves when exposed 2.5 M KCl. Copper most toxic metals least toxic. metal increased with exposure time. Humic acid (200 mg Pt/l as colour) decreased toxicities Cd Cu, but Zn. EDTA (saturated solution) (1000 μg/l) all three tested. (400 had no effect it These results help estimate reproductive success freshwater unionids in acidifying, humus-rich ecosystems where concentrations increase simultaneously increasing heavy concentrations.
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