Article

 

Demographics of Piscivorous Colonial Waterbirds and Management Implications for ESA-listed Salmonids on the Columbia Plateau Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/4j03d1369

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by the Northwest Scientific Association and can be found at:  http://www.bioone.org/loi/nwsc.

Descriptions

Attribute NameValues
Creator
Abstract
  • We investigated colony size, productivity, and limiting factors for five piscivorous waterbird species nesting at 18 locations on the Columbia Plateau (Washington) during 2004–2010 with emphasis on species with a history of salmonid (Oncorhynchus spp.) depredation. Numbers of nesting Caspian terns (Hydroprogne caspia) and double-crested cormorants (Phalacrocorax auritus) were stable at about 700–1,000 breeding pairs at five colonies and about 1,200–1,500 breeding pairs at four colonies, respectively. Numbers of American white pelicans (Pelecanus erythrorhynchos) increased at Badger Island, the sole breeding colony for the species on the Columbia Plateau, from about 900 individuals in 2007 to over 2,000 individuals in 2010. Overall numbers of breeding California gulls (Larus californicus) and ring-billed gulls (L. delawarensis) declined during the study, mostly because of the abandonment of a large colony in the mid-Columbia River. Three gull colonies below the confluence of the Snake and Columbia rivers increased substantially, however. Factors that may limit colony size and productivity for piscivorous waterbirds nesting on the Columbia Plateau included availability of suitable nesting habitat, interspecific competition for nest sites, predation, gull kleptoparasitism, food availability, and human disturbance. Based on observed population trends alone, there is little reason to project increased impacts to juvenile salmonid survival from tern and cormorant populations. Additional monitoring and evaluation may be warranted to assess future impacts of the growing Badger Island American white pelican colony and those gull colonies located near mainstem dams or associated with Caspian tern colonies where kleptoparasitism is common.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Adkins, J. Y., Lyons, D. E., Loschl, P. J., Roby, D. D., Collis, K., Evans, A. F., & Hostetter, N. J. (2014). Demographics of Piscivorous Colonial Waterbirds and Management Implications for ESA-listed Salmonids on the Columbia Plateau. Northwest Science, 88(4), 344-359. doi:10.3955/046.088.0408
Journal Title
Series
Keyword
Rights Statement
Funding Statement (additional comments about funding)
  • The U.S. Army Corps of Engineers (USACE)–Walla Walla District and the U.S. Bureau of Reclamation (BOR) provided funding for this research.
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2015-02-25T23:50:33Z (GMT). No. of bitstreams: 1 AdkinsJessicaFisheriesWildlifeDemographicsPiscivorous.pdf: 461396 bytes, checksum: 740e93d7f3dbd9759b35a5319dd0d51b (MD5) Previous issue date: 2014-11
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2015-02-25T23:50:20Z No. of bitstreams: 1 AdkinsJessicaFisheriesWildlifeDemographicsPiscivorous.pdf: 461396 bytes, checksum: 740e93d7f3dbd9759b35a5319dd0d51b (MD5)
  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2015-02-25T23:50:33Z (GMT) No. of bitstreams: 1 AdkinsJessicaFisheriesWildlifeDemographicsPiscivorous.pdf: 461396 bytes, checksum: 740e93d7f3dbd9759b35a5319dd0d51b (MD5)

Relationships

Parents:

This work has no parents.

Items