Bald eagles of the Hanford National Environmental Research Park

Fitzner, R. E.; Watson, D. G.; Rickard, W. H.

doi:10.2172/6580437

Title: Bald eagles of the Hanford National Environmental Research Park

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Abstract

Since 1961, near-yearly aerial surveys of bald eagles along the Hanford reach of the Columbia River have been conducted. Prey resources available to the eagles have also been monitored and we have thus been able to examine predator-prey relationships in a statistical fashion. We report on a unique set of data which provides insight into one of the factors (prey availability) controlling bald eagle wintering populations. The winter distribution of the bald eagle (Haliaeetus leucocephalus) has been reported to closely follow the availability of prey (Servheen 1975, Southern 1963, Shea 1973, Spencer 1976). Fitzner and Hanson (1979) compared twelve years of eagle winter survey data on the Hanford DOE Site with waterfowl numbers and salmon redd densities over the same period and provided some statistical evidence that eagle wintering numbers varied somewhat dependently with changing salmon redd numbers but not with changing waterfowl numbers. This report re-examines Fitzner and Hanson's (1979) twelve year data set and supplies two additional years of data for the Hanford DOE Site in order to gain additional insight into predator-prey interactions.

Authors:: Fitzner, R. E.; Watson, D. G.; Rickard, W. H.

Publication Date:: Sun Jun 01 00:00:00 EDT 1980

Research Org.:: Battelle Pacific Northwest Labs., Richland, WA (United States)

OSTI Identifier:: 6580437

Report Number(s):: PNL-SA-8504

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; BIRDS; POPULATION DYNAMICS; PREDATOR-PREY INTERACTIONS; HANFORD RESERVATION; DATA COMPILATION; ECOLOGY; ANIMALS; DATA; INFORMATION; NATIONAL ORGANIZATIONS; NUMERICAL DATA; US DOE; US ERDA; US ORGANIZATIONS; VERTEBRATES; 510100* - Environment, Terrestrial- Basic Studies- (-1989)

Citation Formats


                    Fitzner, R. E., Watson, D. G., and Rickard, W. H. Bald eagles of the Hanford National Environmental Research Park.  United States: N. p., 1980. 
        Web.  doi:10.2172/6580437.

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                    Fitzner, R. E., Watson, D. G., & Rickard, W. H. Bald eagles of the Hanford National Environmental Research Park.  United States.  https://doi.org/10.2172/6580437

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                    Fitzner, R. E., Watson, D. G., and Rickard, W. H. 1980.  
        "Bald eagles of the Hanford National Environmental Research Park".  United States.  https://doi.org/10.2172/6580437.  https://www.osti.gov/servlets/purl/6580437.

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@article{osti_6580437,

  title        = {Bald eagles of the Hanford National Environmental Research Park},

  author       = {Fitzner, R. E. and Watson, D. G. and Rickard, W. H.},

  abstractNote = {Since 1961, near-yearly aerial surveys of bald eagles along the Hanford reach of the Columbia River have been conducted. Prey resources available to the eagles have also been monitored and we have thus been able to examine predator-prey relationships in a statistical fashion. We report on a unique set of data which provides insight into one of the factors (prey availability) controlling bald eagle wintering populations. The winter distribution of the bald eagle (Haliaeetus leucocephalus) has been reported to closely follow the availability of prey (Servheen 1975, Southern 1963, Shea 1973, Spencer 1976). Fitzner and Hanson (1979) compared twelve years of eagle winter survey data on the Hanford DOE Site with waterfowl numbers and salmon redd densities over the same period and provided some statistical evidence that eagle wintering numbers varied somewhat dependently with changing salmon redd numbers but not with changing waterfowl numbers. This report re-examines Fitzner and Hanson's (1979) twelve year data set and supplies two additional years of data for the Hanford DOE Site in order to gain additional insight into predator-prey interactions.},

  doi          = {10.2172/6580437},

  url          = {https://www.osti.gov/biblio/6580437},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sun Jun 01 00:00:00 EDT 1980},

  month        = {Sun Jun 01 00:00:00 EDT 1980}

}

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