A gravity-flow column to provide pesticide-laden water for aquatic bioassays

  • Patrick W. Borthwick
  • Marlin E. Tagatz
  • Jerrold Forester
Article

Conclusions

Concentrations of mirex among individual tanks in each test were not statistically different at the 5-percent significance level; whereas, differences in mirex concentrations in tank water among experiments were significant. Paired comparisons indicated statistical differences between the first and second, and the second and third experiments, but not between the first and third experiment. These differences in mean mirex concentrations in tank water may have been caused by seasonal variations in water temperature. Fluctuations in the mirex concentrations within individual tanks were not significant.

In its present state of development, the described gravityflow column is being utilized in seasonal tests to deliver mirexladen water to determine toxicity and uptake of mirex by several animal species in an artificial estuarine ecosystem.

Keywords

Tank Water Endrin Mirex Conditioning Period Individual Tank 

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References

  1. CHADWICK, G. G., and U. KIIGEMAGI: J. Water Pollut. Control Fed.,40, 76 (1968).Google Scholar
  2. GRAJCER, D., Ph. D. Dissertation, Univ. Wash. 80 pp. (1968).Google Scholar
  3. HICKS, C. R.: Fundamental Concepts in the Design of Experiments. 2 ed. New York: Holt, Rinehart and Winston 1973.Google Scholar
  4. JOHNSON, H. E., Ph. D. Dissertation, Univ. Wash. 136 pp. (1967).Google Scholar
  5. PARRISH, P. R. Personal Communication, U. S. Environmental Protection Agency, Gulf Breeze, Florida (1973).Google Scholar

Copyright information

© Springer-Verlag New York Inc. 1975

Authors and Affiliations

  • Patrick W. Borthwick
    • 1
    • 2
  • Marlin E. Tagatz
    • 1
    • 2
  • Jerrold Forester
    • 1
    • 2
  1. 1.Gulf Breeze Environmental Research LaboratoryU.S. Environmental Protection AgencyGulf Breeze
  2. 2.Associate Laboratory of the National Environmental Research CenterCorvallis

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