Effects of copper on adult and early life stages of the freshwater clam, Corbicula manilensis
The copper sensitivity of adult and larval stages of the freshwater clam Corbicula manilensis was evaluated. In addition, copper concentrations in adult clams exposed for 4 to 10 wks to copper in a high-volume, flow-through bioassay are determined. The response of these clams to copper depended on life stage. Copper sensitivity of larvae decreased markedly in successive developmental stages. The LC50/sub 24/s of veliger and juvenile larve were 28 and 600 ..mu..g Cu/L, respectively. The mortality of trochophore larvae exposed to 10 ..mu..g Cu/L for 1 h was 91.5%. The sensitivity to copper decreased with the amount of larval shell deposition. Adult clams were resistant to copper; the LC50/sub 96/ was greater than 2600 ..mu..g Cu/L. By comparison the incipient concentration (ILC) was low - less than 10 ..mu..g Cu/L. Adult clams accumulated more copper as copper concentrations in the water increased. Evidence for copper loss near or at death was obtained.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5056152
- Report Number(s):
- NUREG/CR-1379; UCRL-52741; ON: TI86000951
- Country of Publication:
- United States
- Language:
- English
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