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Zooplankton spine induces aversion in small fish predators

dc.contributor.authorBarnhisel, D. Raeen_US
dc.identifier.citationBarnhisel, D. Rae; (1991). "Zooplankton spine induces aversion in small fish predators." Oecologia 88(3): 444-450. <>en_US
dc.description.abstractThe spined cladoceran Bythotrephes cederstroemi is protected from small fish predators due to the difficulty small fish have in ingesting the spine. Juvenile yellow perch (Perca flavescens) 50–60 mm in length were offered Bythotrephes with alternative prey available in two experiments. First, perch were observed as they gained experience with Bythotrephes and developed aversion to the zooplankter. Perch initially attacked and captured Bythotrephes . However, they struggled to ingest the spined zooplankter, rejected and recaptured it many times, and finally ceased to attack it. Second, perch were offered Bythotrephes with varying portions of the spine removed to clarify the spine's role in inducing such behaviors. Perch showed greater preference to attack nospine and half-spine Bythotrephes , and were less likely to reject and more likely to ingest Bythotrephes with the spine removed. For small or young fish that forage on zooplankton in lakes where Bythotrephes is present, aversion is an efficient response to the conspicuous but unpalatable spined cladoceran. However, aversion allows Bythotrephes , also a predator on zooplankton, to more effectively compete with young fish without an increase in predation risk.en_US
dc.format.extent842491 bytes
dc.format.extent3115 bytes
dc.subject.otherYellow Perchen_US
dc.subject.otherLife Sciencesen_US
dc.subject.otherPlant Sciencesen_US
dc.subject.otherPredator Defenseen_US
dc.subject.otherBythotrephes Cederstroemien_US
dc.titleZooplankton spine induces aversion in small fish predatorsen_US
dc.subject.hlbsecondlevelNatural Resources and Environmenten_US
dc.subject.hlbsecondlevelMolecular, Cellular and Developmental Biologyen_US
dc.subject.hlbsecondlevelEcology and Evolutionary Biologyen_US
dc.subject.hlbtoplevelHealth Sciencesen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Biology, University of Michigan, 48109, Ann Arbor, MI, USA; the University of Michigan Biological Station, University of Michigan, 48109, Ann Arbor, MI, USA; Department of Biological Sciences, and Lake Superior Ecosystem Research Center, Michigan Technological University, 49931, Houghton, MI, USAen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.owningcollnameInterdisciplinary and Peer-Reviewed

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