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dc.contributor.advisorNoltie, Douglas B. (Douglas Brian)eng
dc.contributor.authorWitte, Christopher C.eng
dc.date.issued2008eng
dc.date.submitted2008 Falleng
dc.descriptionThe entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.eng
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on October 6, 2009).eng
dc.descriptionThesis advisor: Dr. Douglas B. Noltie.eng
dc.descriptionM.S. University of Missouri--Columbia 2008.eng
dc.description.abstractThe Topeka shiner (Notropis topeka) is a federally-listed endangered cyprinid species native to small headwater prairie streams in the mid-west of the United States. It generally spawns over and around sunfish (Lepomis sp.) nests. The objectives of the present studies were to assess the effects that temperature, photoperiod, and substrate size have on the Topeka shiner's maturation and reproductive behavior. A longer photoperiod yielded greater male GSIs and female final weights and GSIs than a shorter photoperiod. The results generally indicated that 31[degrees]C exceeded the optimum temperature. Ovarian histology indicated that spawning had likely occurred in all treatments by the end of the experiment. The frequency of occurrence of reproductive behaviors was greater in the morning and decreased through the day. Substrate utilization by Topeka shiners in the absence of sunfish was tested to determine the shiner's fundamental preference. Fine substrates were chosen over Small Gravel, Large Gravel, Small Cobble, and the Bare Floor of the experimental tank. This preference may influence which sunfish nests are utilized, given that nest substrate characteristics differ both between sunfish species and within species across spawning site locations.eng
dc.description.bibrefIncludes bibliographical referenceseng
dc.identifier.merlinb71578183eng
dc.identifier.oclc456291319eng
dc.identifier.urihttps://hdl.handle.net/10355/5779
dc.identifier.urihttps://doi.org/10.32469/10355/5779eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.rightsOpenAccess.eng
dc.rights.licenseThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.
dc.subject.lcshTopeka shiner -- Growtheng
dc.subject.lcshTopeka shiner -- Effect of light oneng
dc.subject.lcshTopeka shiner -- Reproductioneng
dc.subject.lcshTopeka shiner -- Effect of habitat modification oneng
dc.subject.lcshRare fisheseng
dc.subject.lcshEndangered specieseng
dc.titleEffects of temperature, photoperiod, and substrate on the maturation and reproductive behavior of the Topeka shiner (Notropis topeka)eng
dc.typeThesiseng
thesis.degree.disciplineFisheries and wildlife sciences (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelMasterseng
thesis.degree.nameM.S.eng


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