Life History and Secondary Production of Goniobasis proxima (Prosobranchia: Pleuroceridae) from Four Appalachian Headwater Streams in Western North Carolina

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dc.contributor.authorJeremiah, Nicholas G.en
dc.contributor.committeechairBenfield, Ernest F.en
dc.contributor.committeememberValett, H. Mauriceen
dc.contributor.committeememberVoshell, J. Reese Jr.en
dc.contributor.departmentBiologyen
dc.date.accessioned2014-03-14T20:47:49Zen
dc.date.adate2007-11-30en
dc.date.available2014-03-14T20:47:49Zen
dc.date.issued2007-10-17en
dc.date.rdate2007-11-30en
dc.date.sdate2007-11-13en
dc.description.abstractI investigated life history traits and secondary production of populations of Goniobasis proxima in four streams from July 2005 to June 2006. Measurements of canopy cover, conductivity, alkalinity, temperature, and nitrate-nitrogen (NO3-N), as well as snail size, density, and occupied substrate were taken monthly for each stream. Snail growth rates were determined in an aquarium for 10 size classes and secondary production was estimated as the summed product of size class growth rates and field biomass measurements. Size class production estimates tracked biomass with intermediate to larger sized snails dominating production, despite smaller snails growing faster. Production estimates across streams ranged from 1,400 mg m-2 yr-1 to 22,183 mg m-2 yr-1 with noticeable summer highs and winter lows. Annual turnover was slow (0.43-0.49) owing to slow growth and long development time. Snails preferred leaves/wood as a substrate to occupy over rock and sand and showed no appreciable grazing effect on the epilithon community.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-11132007-155118en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11132007-155118/en
dc.identifier.urihttp://hdl.handle.net/10919/35689en
dc.publisherVirginia Techen
dc.relation.haspartThesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectaquaticen
dc.subjectgrazingen
dc.subjectpopulation ecologyen
dc.subjectparasitismen
dc.subjectsubstrateen
dc.titleLife History and Secondary Production of Goniobasis proxima (Prosobranchia: Pleuroceridae) from Four Appalachian Headwater Streams in Western North Carolinaen
dc.typeThesisen
thesis.degree.disciplineBiologyen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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