Interactions between Chaoborus spp. and Mysis relicta and their impact on pelagic crustacean zooplankton in mesocosms at the Experimental Lakes Area

dc.contributor.authorSeckar, Dalila
dc.contributor.examiningcommitteeGalloway, Terry D. (Entomology) Hann, Brenda J. (Biological Sciences)en
dc.contributor.supervisorPaterson, Michael J. (Entomology)en
dc.date.accessioned2009-04-13T16:48:22Z
dc.date.available2009-04-13T16:48:22Z
dc.date.issued2009-04-13T16:48:22Z
dc.degree.disciplineEntomologyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractThe objectives of this study were: 1) to compare and contrast the effects of variations in natural densities of two common freshwater predators of crustacean zooplankton, Chaoborus spp. and Mysis relicta; and 2) to determine whether the combined impacts of these predators together differed from their effects when alone. In deep (>10m) mesocosms, additions of Chaoborus and Mysis at natural densities did not result in large changes in zooplankton abundances, lengths, or biomass. Significant decreases in abundance were observed only for Bosmina longirostris and Daphnia spp. In small (~20L) enclosures, higher predator densities caused zooplankton declines over three days. Strong interactive effects between Chaoborus and Mysis were not detected in either the large or small enclosures. This suggests that the combined effects of these two predators can be predicted from their effects determined in isolation.en
dc.description.noteMay 2009en
dc.format.extent1196881 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1993/3144
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectzooplanktonen
dc.subjectCanadian Shielden
dc.subjectphantom midgeen
dc.subjectopposum shrimpen
dc.subjectpredationen
dc.subjectspecies abundanceen
dc.subjectbiomassen
dc.subjectvertical migrationen
dc.subjectmultiple predatorsen
dc.subjectoligotrophicen
dc.subjectBosminaen
dc.titleInteractions between Chaoborus spp. and Mysis relicta and their impact on pelagic crustacean zooplankton in mesocosms at the Experimental Lakes Areaen
dc.typemaster thesisen_US
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