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The Effect of Oil Spraying on Eggs of Double-Crested Cormorants

Author

Listed:
  • K. A. Shonk

    (Wilfrid Laurier University)

  • S. D. Kevan

    (Wilfrid Laurier University)

  • D. V. Weseloh

    (Environment Canada)

Abstract

Spraying eggs with oil has been used as a method of decreasing the reproductive success of super abundant avian species. Double-crested Cormorant (Phalacrocorax auritus) abundances have created a potential disturbance to some endangered species of birds, sport fishing communities and aquaculture facilities. The hatching success of oil sprayed Double-crested Cormorant eggs was investigated. Oil spraying was done during the first, second, or third week of the egg’s incubation to determine the most effective time during the incubation period for a one-time treatment. The oil spraying technique was 95–98% effective at preventing hatching. Hatching success was independent of the week of incubation that an egg was sprayed with oil. The maximum number of eggs on the colony occurred four weeks after the first egg was laid. This would be the most efficient week to spray the colony to decrease hatching success.

Suggested Citation

  • K. A. Shonk & S. D. Kevan & D. V. Weseloh, 2004. "The Effect of Oil Spraying on Eggs of Double-Crested Cormorants," Environment Systems and Decisions, Springer, vol. 24(2), pages 119-124, June.
    • Handle: RePEc:spr:envsyd:v:24:y:2004:i:2:d:10.1007_s10669-004-4802-0
    DOI: 10.1007/s10669-004-4802-0
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    Cited by:

    1. Guillaumet, Alban & Dorr, Brian & Wang, Guiming, 2012. "Towards optimized population control efficiency in space and time: A modelling framework adapted to a colonial waterbird," Ecological Modelling, Elsevier, vol. 235, pages 95-101.

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