Characterization of triploid Grass Carp stockings in private waters of Texas

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dc.contributor.advisorBonner, Timothy H.
dc.contributor.authorMcCartney, Robert P.
dc.contributor.committeeMemberHagelman, Ronald
dc.contributor.committeeMemberSerenari, Christopher
dc.contributor.committeeMemberMcDonald, Dusty
dc.date.accessioned2021-11-24T19:31:28Z
dc.date.available2021-11-24T19:31:28Z
dc.date.issued2021-12
dc.description.abstractGrass Carp <i>Ctenopharyngodon idella</i> is used worldwide as a biological control of nuisance aquatic vegetation. Use of triploid Grass Carp in Texas was legalized for stocking on private lands in 1992. Since 1992, landowners seeking to stock triploid Grass Carp must complete a Texas Parks and Wildlife Department (TPWD) permit application, which requires the number of Grass Carp requested, estimated surface area, percent vegetation coverage, and other information on the location and characteristics of the receiving water body. Once applications are received by TPWD, specifics of the application are entered into a database before being approved or denied by TPWD personnel. Purpose of this study was to summarize and characterize the number of permits, number of triploid Grass Carp requested, receiving water body characteristics, and estimated costs in stocking triploid Grass Carp between 1992 and 2020. A total of 30,387 permit applications were submitted, requesting 818,667 triploid Grass Carp of which 793,020 were approved by TPWD. Mean number (± 1 SD) of permit applications per year was 1,048 (± 166), and mean number of triploid Grass Carp requested per year was 28,229 (± 7,881). Trends in permit applications and number of triploid Grass Carp requested were similar between 1992 and 2020. Greater number of requests were for first time, introductory stockings than repeat, supplemental stockings and were from east Texas ecoregions than in central and west Texas ecoregions. Majority of the receiving water bodies were <2.0 ha with >50% submergent vegetative coverage. About 4% of the applications were denied. Estimated cost of stocking ranged between $200 and $400 per ha. Results of this study inform landowners on the practice of triploid Grass Carp as a biological control of nuisance aquatic vegetation but also highlights gaps in information, such as efficacy in controlling aquatic vegetation and the number of triploid Grass Carp stocked, that could benefit TPWD and other natural resource agencies that continue to regulate the stocking of triploid Grass Carp.
dc.description.departmentSociology
dc.formatText
dc.format.extent37 pages
dc.format.medium1 file (.pdf)
dc.identifier.citationMcCartney, R. P. (2021). <i>Characterization of triploid grass carp stockings in private waters of Texas</i> (Unpublished thesis). Texas State University, San Marcos, Texas.
dc.identifier.urihttps://hdl.handle.net/10877/14945
dc.language.isoen
dc.subjectPrivate waters of Texas
dc.subjectTexas
dc.subjectGrass carp
dc.subjectCtenopharyngodon idella
dc.subjectTriploid grass carp
dc.subjectBiological control
dc.subjectAquatic vegetation control
dc.subjectNuisance vegetation
dc.subjectGrass Carp stocking
dc.subjectTexas Parks and Wildlife Department
dc.subjectTPWD
dc.subjectGrass carp permitting
dc.subjectPermit applications
dc.subjectPermit application database
dc.subjectLandowners
dc.subjectStocking requests
dc.subjectWater body characteristics
dc.subjectEstimated stocking costs
dc.subjectRepeat stocking
dc.titleCharacterization of triploid Grass Carp stockings in private waters of Texas
dc.typeThesis
thesis.degree.departmentSociology
thesis.degree.disciplineSustainability Studies
thesis.degree.grantorTexas State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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