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dc.contributor.advisorGalat, David L.en
dc.contributor.authorRidenour, Claytonen_US
dc.coverage.spatialMissouri River
dc.date.issued2007eng
dc.date.submitted2007 Summeren
dc.descriptionThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.en_US
dc.descriptionTitle from title screen of research.pdf file (viewed on January 8, 2008)en_US
dc.descriptionIncludes bibliographical references.en_US
dc.descriptionThesis (M.S.) University of Missouri-Columbia 2007.en_US
dc.descriptionDissertations, Academic -- University of Missouri--Columbia -- Fisheries and wildlife.en_US
dc.description.abstractPopulations of many native big-river fishes have declined since channelization and flow regulation contributed to losses of shallow-water habitat (SWH) on lower Missouri River (LMOR). Existing point and wing-dike sandbars represent a potentially important source of SWH to fishes during early ontogeny within the main channel of LMOR. Small-bodied fishes were sampled using pre-positioned electrofishing devices from 0.0-0.5 m water depths adjacent to four point and four wing-dike sandbars on LMOR between July and October, 2005. A suite of associated environmental factors were also measured. Habitat use and assemblage structure relative to three spatial (sandbar type, region within sandbars, and distance from shoreline within region) and two temporal (month, diel), and environmental factors were evaluated using Analysis of Variance, Detrended Correspondence Analysis, and Canonical Correspondence Analysis. Samples yielded 49 species from 13 families in depths 0.0-0.5 m; most fishes were [lesser than or equal to]105 mm TL. Fish mean length increased but abundance decreased from July to October. Ordination analyses revealed that the assemblage was organized into bodylength subgroups. Fish assemblages were not different between point and wing-dike sandbars. Instead, fishes aligned along a depth-velocity gradient relative to body length. Shallow (ca. 0.12m), near-shore areas were dominated by fishes [lesser than] 35 mm TL during the day, but larger fishes (e.g., 70 mm TL) moved nearer to shore at night. This research shows that main-channel sandbars provide nursery to many fluvial fishes during early ontogeny and that sandbars play an important role as nursery in large regulated rivers.en_US
dc.identifier.merlin.b61743707en_US
dc.identifier.oclc190648291en_US
dc.identifier.otherRidenourC-072707-T7980en_US
dc.identifier.urihttp://hdl.handle.net/10355/5076
dc.publisherUniversity of Missouri--Columbiaen_US
dc.relation.ispartofcollection2007 Freely available theses (MU)
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. Graduate School. Theses and Dissertations. Theses. 2007 Theses
dc.subject.lcshFishes -- Habitat -- Missouri Riveren_US
dc.subject.lcshFishes -- Infancy -- Habitat -- Missouri Riveren_US
dc.subject.lcshOntogenyen_US
dc.subject.lcshSediment transporten_US
dc.subject.lcshLand-water ecotonesen_US
dc.subject.lcshSand barsen_US
dc.titleAssemblage structure and shallow-water habitat use by small-bodied fishes at lower Missouri River sandbarsen_US
dc.typeThesisen_US
thesis.degree.disciplineFisheries and wildlife sciencesen_US
thesis.degree.disciplineFisheries and wildlife scienceseng
thesis.degree.grantorUniversity of Missouri--Columbiaen_US
thesis.degree.levelMastersen_US
thesis.degree.nameM.S.en_US


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