Effects of copper on freshwater mussels: Distribution, bioaccumulation, and effects on calcium homeostasis
| Main Authors: | Nugroho, Andhika Puspito, Frank, Hartmut |
|---|---|
| Format: | Proceeding PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
, 2011
|
| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/118046/1/YES%20meeting%20abstract%20book%20%28Andhika%29.pdf https://repository.ugm.ac.id/118046/ |
Daftar Isi:
- Copper (Cu) in aquatic ecosystems is present in dissolved form, associated with suspended food particles, and as inorganic insoluble species in the sediment. It is an essential element to mussels at about 20 mg kg-1 body weight which is taken up from water, food, or both, but it is toxic above 80 mg kg-1. In view of the general decline of almost all freshwater mollusks, the aims of this study are to determine to which extent Cu is involved. Bivalves of the species Anodonta anatina are exposed via food or water by using the stable isotope 63Cu as tracer, to assess its accumulation in the various organs and to monitor its effects on calcium (Ca), carbohydrate, and protein levels. During 63Cu exposure via the water (0.3 μmol L-1 63Cu) or via the food (1.5 mg L-1 63Cu-loaded algae, equivalent to 0.35 μmol L-1 63Cu) for 24 days, the contents of exogenous (63Cu) and total Cu in all body compartments increase with time, by the water pathway to a higher level than via the food. Cu concentrations are highest in the digestive gland followed by the kidney, mantle, gills, and other tissues. Following the increases in Cu concentrations, Ca concentrations increase in all body compartments while carbohydrate and protein levels decrease; stronger effects are observed in the mussels exposed to Cu via the water. During depuration for 12 days, Cu is eliminated, accompanied by a decrease in Ca and increases in carbohydrate and protein levels. The results show that distribution and accumulation of copper are time- and pathway-dependent and organ-specific. The digestive gland is the main site of Cu accumulation. Increased copper uptake leads to disturbances of Ca homeostasis and to decreases in protein and carbohydrate levels.