Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/21912
Full metadata record
DC FieldValueLanguage
dc.contributor.authorBeckmann, Christaen
dc.contributor.authorBiro, Peter Aen
dc.contributor.authorPost, John Ren
dc.date.accessioned2017-09-26T15:36:00Z-
dc.date.issued2006-
dc.identifier.citationCanadian Journal of Zoology, 84(11), p. 1584-1593en
dc.identifier.issn1480-3283en
dc.identifier.issn0008-4301en
dc.identifier.urihttps://hdl.handle.net/1959.11/21912-
dc.description.abstractFish are frequently considered the top predator in freshwater food web models despite evidence that predatory birds can impact fish populations. In this study, we quantified bird predation rates on experimental populations of rainbow trout (Oncorhynchus mykiss (Walbaum, 1792)) created by stocking nine small lakes in British Columbia, Canada. Combining estimates of fish mortality with estimated bird predation rates allowed us to partition fish mortality into that due to birds versus cannibalism. Our results indicated that bird predators had significant impacts on age-1 trout populations, but little impact on age-0 trout. Common loons (Gavia immer Brunnich, 1764) were the principle predator among eight predatory bird species present, apparently consuming nearly 50% of all stocked age-1 trout and explaining almost 50% of variation in mortality rates. Age-1 trout mortality did not differ significantly from zero in lakes without loons. Birds consumed a small proportion of age-0 trout, and estimated consumption explained none of the variation in age-0 trout mortality among lakes. We conclude that birds affect fish populations by asymmetric predation on different age (size) classes and can be important top predators that should not be ignored when characterizing freshwater food webs in lakes.en
dc.languageenen
dc.publisherNRC Research Pressen
dc.relation.ispartofCanadian Journal of Zoologyen
dc.titleAsymmetric impact of piscivorous birds on size-structured fish populationsen
dc.typeJournal Articleen
dc.identifier.doi10.1139/Z06-151en
dc.subject.keywordsFreshwater Ecologyen
dc.subject.keywordsAnimal Behaviouren
dc.subject.keywordsBehavioural Ecologyen
local.contributor.firstnameChristaen
local.contributor.firstnamePeter Aen
local.contributor.firstnameJohn Ren
local.subject.for2008060201 Behavioural Ecologyen
local.subject.for2008060801 Animal Behaviouren
local.subject.for2008060204 Freshwater Ecologyen
local.subject.seo2008960807 Fresh, Ground and Surface Water Flora, Fauna and Biodiversityen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailcbeckman@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-chute-20170923-182548en
local.publisher.placeCanadaen
local.format.startpage1584en
local.format.endpage1593en
local.peerreviewedYesen
local.identifier.volume84en
local.identifier.issue11en
local.contributor.lastnameBeckmannen
local.contributor.lastnameBiroen
local.contributor.lastnamePosten
dc.identifier.staffune-id:cbeckmanen
local.profile.orcid0000-0002-7904-7228en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:22102en
local.identifier.handlehttps://hdl.handle.net/1959.11/21912en
dc.identifier.academiclevelAcademicen
local.title.maintitleAsymmetric impact of piscivorous birds on size-structured fish populationsen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorBeckmann, Christaen
local.search.authorBiro, Peter Aen
local.search.authorPost, John Ren
local.uneassociationUnknownen
local.year.published2006en
Appears in Collections:Journal Article
School of Environmental and Rural Science
Files in This Item:
2 files
File Description SizeFormat 
Show simple item record

SCOPUSTM   
Citations

16
checked on Feb 15, 2025

Page view(s)

1,262
checked on Sep 3, 2023
Google Media

Google ScholarTM

Check

Altmetric


Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.