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dc.contributor.advisorHayward, Robert Scotteng
dc.contributor.authorDoerhoff, Adam Jonathaneng
dc.date.issued2007eng
dc.date.submitted2007 Falleng
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.eng
dc.descriptionTitle from title screen of research.pdf file (viewed on March 24, 2008)eng
dc.descriptionIncludes bibliographical references.eng
dc.descriptionThesis (M.S.) University of Missouri-Columbia 2007.eng
dc.descriptionDissertations, Academic -- University of Missouri--Columbia -- Fisheries and wildlife.eng
dc.description.abstractMale bluegill have the greatest potential to reach food market size ([greater than or equal to] 0.5 lb.; 225g) within two growing seasons. However, establishment of monosex, juvenile bluegill groups does not currently exist. A male-percentage prediction (MPP) model was constructed to predict the percentage of males from a mixed-sex, juvenile bluegill group. The MPP model enables reliable establishment of mostly-male groups for culturing. Trenbolone acetate immersions provided a means of establishing these groups other than by size-grading. Sex reversal often yields aggressively feeding fish which ultimately grow faster. Where male recruitment was successful, many post-immersion males exhibited higher growth rates. After establishing mostly-male groups, the goal is to reduce the agonistic social costs of group confinement to promote growth to food market size in two years. Mixed-sex and mostly-male bluegill groups were cultured in parallel to evaluate the effect of sex ratio on growth. Mostly-male groups yielded higher growth rates, but not greater social costs.eng
dc.identifier.merlinb62926019eng
dc.identifier.oclc213817901eng
dc.identifier.urihttps://hdl.handle.net/10355/4915
dc.identifier.urihttps://doi.org/10.32469/10355/4915eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.subject.lcshBluegill -- Growtheng
dc.subject.lcshBluegill -- Gradingeng
dc.subject.lcshFish tradeeng
dc.titleEstablishing mostly-male bluegill groups and evaluating their growth benefits in indoor rearing systemseng
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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