Copper Sensitivity of the Northern Anchovy, Engraulis mordax, During Its Early Life History

Technical Report · Fri Jun 30 04:00:00 EDT 1978

DOI:https://doi.org/10.2172/6227472· OSTI ID:6227472

Rice, Jr., D. W. ^[1]; Harrison, F. L. ^[1]

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1. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

The sensitivity to copper of embryonic and larval stages of the Northern anchovy, Engraulis mordax, was determined using a flow-through bioassay system. Anchovy embryos were exposed continuously from 8 to 10 h after fertilization until hatching, and the larvae were exposed within 24 h after hatching until yolk-sac absorption. During the testing, both total copper concentrations and the percent copper in labile forms were determined. From the cumulative mortality vs measured copper exposure data, a series of median lethal concentrations (LC₅₀) were determined. These LC₅₀ values were used to construct comparative toxicity curves. The anchovy life stage most sensitive to copper was the embryonic stage. For the anchovy embryo, the 12-h LC₅₀ was 200 ..mu..g Cu/l, and the estimated incipient lethal concentration (ILC₅₀) was 190 ..mu..g Cu/l; a sensitive period of embryonic development was noted prior to closure of the blastopore. The 12-h, 24-h, and ILC/sub 50/ for anchovy larvae were 460, 400, and 370 ..mu..g Cu/l, respectively.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USNRC; USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6227472
• Report Number(s): NUREG/CR--0748; UCRL--52499
• Country of Publication: United States
• Language: English

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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AGE DEPENDENCE
ANIMALS
ANTIFOULANTS
AQUATIC ORGANISMS
BENCH-SCALE EXPERIMENTS
BIOLOGICAL EFFECTS
CHEMICAL EFFLUENTS
CHRONIC EXPOSURE
COASTAL WATERS
COATINGS
COPPER
DATA
DATA FORMS
DOSE-RESPONSE RELATIONSHIPS
ELEMENTS
EMBRYOS
EXPERIMENTAL DATA
FISHES
INFORMATION
ISOLATED VALUES
LARVAE
METALS
MORTALITY
MUNICIPAL WASTES
NUMERICAL DATA
PAINTS
POLLUTION
POWER PLANTS
SENSITIVITY
SURFACE WATERS
SURVIVAL TIME
THERMAL POWER PLANTS
TOXICITY
TRANSITION ELEMENTS
VERTEBRATES
WASTES
WATER POLLUTION