Show simple item record

Competitive exclusion among crayfish: effects of competition on population size (Orconectes propinquus).

dc.contributor.authorLentz, Lisaen_US
dc.coverage.spatialMaple Riveren_US
dc.coverage.spatialDamsiteen_US
dc.date.accessioned2007-06-14T23:35:10Z
dc.date.available2007-06-14T23:35:10Z
dc.date.issued2005en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/55067
dc.description.abstractInvasion of exotic plants and animals has been consistently linked with the extinction of native species leading scientists to suspect competitive exclusion. Invasive species are controlled within their home range by predation or herbivory which has been selected for faster growing, larger and more fecund prey. When released from traditional predation pressures exotic species can experience population explosions and quickly become invasive. However, exotic crayfish have been known to both displace native species and coexist in sympatry. In order to determine if Orconectes rusticus will displace O. propinquus in northern Michigan a study was conducted in order to compare the relative fitness of similar populations of O. propinquus with and without competition from the invasive species O. rusticus. Population sizes were analyzed using mark-recapture. Due to small data sets, no relationship could be determined between the presence of O. rusticus and fitness of O. propinquus. It is possible that O. rusticus is not affecting O. propinquus and is only invasive where humans provide continuous and significant disturbance.en_US
dc.format.extent572895 bytes
dc.format.extent3144 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypetext/plain
dc.relation.haspartGraphen_US
dc.relation.haspartTable of Numbersen_US
dc.subjectNatural History & Evolutionen_US
dc.subject.otherINVERTEBRATESen_US
dc.subject.otherCRAYFISHESen_US
dc.subject.otherBEHAVIORen_US
dc.subject.otherINVASIVEen_US
dc.subject.otherEXOTICen_US
dc.subject.otherCOMPETITIONen_US
dc.subject.otherCOMPETITIVEen_US
dc.subject.otherAGGRESSIONen_US
dc.titleCompetitive exclusion among crayfish: effects of competition on population size (Orconectes propinquus).en_US
dc.typeWorking Paperen_US
dc.subject.hlbsecondlevelNatural Resource and Environmenten_US
dc.subject.hlbtoplevelScienceen_US
dc.contributor.affiliationumBiological Station, University of Michiganen_US
dc.contributor.affiliationumcampusAnn Arboren_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/55067/1/3512.pdfen_US
dc.description.filedescriptionDescription of 3512.pdf : Access restricted to on-site users at the U-M Biological Station.en_US
dc.owningcollnameBiological Station, University of Michigan (UMBS)


Files in this item

Show simple item record

Accessibility: If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.