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The Sensitivity of Adult, Embryonic, and Larval Carp Cyprinus carpio to Copper

Technical Report ·
DOI:https://doi.org/10.2172/5225828· OSTI ID:5225828
 [1];  [1]
  1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
The copper sensitivity of adult, embryonic, and larval stages of carp Cyprinus carpio was determined using flow-through bioassay methods. Carp adults, embryos, and larvae were exposed continuously to copper concentrations that ranged from those producing an immediate effect to those producing none. Carp embryos were obtained after we induced adults to spawn. Exposure of embryos began at 4 to 6, 8 to 10, and 20 to 24 h after fertilization and continued until hatching. Exposure of larvae began 6 to 8 h after hatching and continued until yolk sac absorption. From the family of curves of cumulative mortality versus duration of exposure, median lethal times were determined and used to construct comparative toxicity curves. The 24-h LC50s show the order of acute copper sensitivity of carp life-history stages, measured in micrograms per liter, as; larvae (180 μg/L) > embryos (240 μg/L) > adults (540 μg/L). Estimated incipient lethal concentrations give the order of subacute copper sensitivity of carp life-history stages as: larvae (110 μg/L) > adult (120 μg/L) > embryo (230 μg/L). The sensitivity of carp embryos to copper changed as embryogenesis progressed; for example, embryos were approximately twice as sensitive before as after blastopore closure.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; USNRC
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
5225828
Report Number(s):
NUREG/CR--1089; UCRL-52726; ON: TI86000131
Country of Publication:
United States
Language:
English