{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/88591"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/88591","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Distribution of Rotifera and Cladocera in a regulated river system","abstract":"The purpose of this study was to determine distributions of Rotifera and Cladocera in the Kanawha River in West Virginia. Rotifera were sampled monthly for twelve months with a Juday trap in the more lotic upstream end of Winfield pool (UW), and the more lentic downstream end of Winfield pool (LW) to determine seasonal distribution. During the period of peak rotifer abundance, rotifers were sampled along a longitudinal transect of Winfield pool and lower Marmet pool to determine longitudinal distribution. Cladocera were sampled with funnel traps at Marmet and Winfield Locks and Dams from lock wall, mid channel, and near shore sites. The seasonal study showed that both UW and LW total rotifer densities were characterized by a single summer population peak. The same physical and/or chemical parameters did not account for equivalent variation in rotifer densities at the two stations. The longitudinal profile showed that a shift in species composition occurred from bacteriophages and detritivorous species upstream to herbivorous species downstream. A new species of the genus Lecane Nitzsch 1827 (Lecanidae: Rotifera) was discovered, namely Lecane arietii n. sp. This species was found to have fungal parasites which apparently effect its distribution. The Cladocera study showed shore and lock wall areas had greater numbers of Cladocera from mud and vegetative habitats than mid channel areas, apparently due to differences in periphyton between the sites. Cladocera from mud and vegetative habitats in lotic systems may be useful organisms to study tow boat perturbations.","abstract_html":"The purpose of this study was to determine distributions of Rotifera and Cladocera in the Kanawha River in West Virginia. Rotifera were sampled monthly for twelve months with a Juday trap in the more lotic upstream end of Winfield pool (UW), and the more lentic downstream end of Winfield pool (LW) to determine seasonal distribution. During the period of peak rotifer abundance, rotifers were sampled along a longitudinal transect of Winfield pool and lower Marmet pool to determine longitudinal distribution. Cladocera were sampled with funnel traps at Marmet and Winfield Locks and Dams from lock wall, mid channel, and near shore sites. The seasonal study showed that both UW and LW total rotifer densities were characterized by a single summer population peak. The same physical and/or chemical parameters did not account for equivalent variation in rotifer densities at the two stations. The longitudinal profile showed that a shift in species composition occurred from bacteriophages and detritivorous species upstream to herbivorous species downstream. A new species of the genus Lecane Nitzsch 1827 (Lecanidae: Rotifera) was discovered, namely Lecane arietii n. sp. This species was found to have fungal parasites which apparently effect its distribution. The Cladocera study showed shore and lock wall areas had greater numbers of Cladocera from mud and vegetative habitats than mid channel areas, apparently due to differences in periphyton between the sites. Cladocera from mud and vegetative habitats in lotic systems may be useful organisms to study tow boat perturbations.","abstract_has_math":false,"creators":["Western, Larry Gene"],"institution":"Virginia Polytechnic Institute and State University","degree_name":"Master of Science","degree_level":"masters","degree_discipline":null,"degree_department":"Zoology","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1984,"date_issued":"1984","date_published":"1984","updated_at":"2026-07-22T22:19:01Z","subjects":[],"languages":["en_US"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/88591","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Zoology"]},{"key":"dc:creator","label":"Author","values":["Western, Larry Gene"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2019-03-26T19:17:01Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2019-03-26T19:17:01Z"]},{"key":"dc:date.issued","label":"Date","values":["1984"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute and State University"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]},{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/88591"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The purpose of this study was to determine distributions of Rotifera and Cladocera in the Kanawha River in West Virginia. Rotifera were sampled monthly for twelve months with a Juday trap in the more lotic upstream end of Winfield pool (UW), and the more lentic downstream end of Winfield pool (LW) to determine seasonal distribution. During the period of peak rotifer abundance, rotifers were sampled along a longitudinal transect of Winfield pool and lower Marmet pool to determine longitudinal distribution. Cladocera were sampled with funnel traps at Marmet and Winfield Locks and Dams from lock wall, mid channel, and near shore sites. The seasonal study showed that both UW and LW total rotifer densities were characterized by a single summer population peak. The same physical and/or chemical parameters did not account for equivalent variation in rotifer densities at the two stations. The longitudinal profile showed that a shift in species composition occurred from bacteriophages and detritivorous species upstream to herbivorous species downstream. A new species of the genus Lecane Nitzsch 1827 (Lecanidae: Rotifera) was discovered, namely Lecane arietii n. sp. This species was found to have fungal parasites which apparently effect its distribution. The Cladocera study showed shore and lock wall areas had greater numbers of Cladocera from mud and vegetative habitats than mid channel areas, apparently due to differences in periphyton between the sites. Cladocera from mud and vegetative habitats in lotic systems may be useful organisms to study tow boat perturbations."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Distribution of Rotifera and Cladocera in a regulated river system"]}]}],"canonical_facts":{"dc:contributor.department":["Zoology"],"dc:creator":["Western, Larry Gene"],"dc:date.accessioned":["2019-03-26T19:17:01Z"],"dc:date.available":["2019-03-26T19:17:01Z"],"dc:date.issued":["1984"],"dc:description.abstract":["The purpose of this study was to determine distributions of Rotifera and Cladocera in the Kanawha River in West Virginia. Rotifera were sampled monthly for twelve months with a Juday trap in the more lotic upstream end of Winfield pool (UW), and the more lentic downstream end of Winfield pool (LW) to determine seasonal distribution. During the period of peak rotifer abundance, rotifers were sampled along a longitudinal transect of Winfield pool and lower Marmet pool to determine longitudinal distribution. Cladocera were sampled with funnel traps at Marmet and Winfield Locks and Dams from lock wall, mid channel, and near shore sites. The seasonal study showed that both UW and LW total rotifer densities were characterized by a single summer population peak. The same physical and/or chemical parameters did not account for equivalent variation in rotifer densities at the two stations. The longitudinal profile showed that a shift in species composition occurred from bacteriophages and detritivorous species upstream to herbivorous species downstream. A new species of the genus Lecane Nitzsch 1827 (Lecanidae: Rotifera) was discovered, namely Lecane arietii n. sp. This species was found to have fungal parasites which apparently effect its distribution. The Cladocera study showed shore and lock wall areas had greater numbers of Cladocera from mud and vegetative habitats than mid channel areas, apparently due to differences in periphyton between the sites. Cladocera from mud and vegetative habitats in lotic systems may be useful organisms to study tow boat perturbations."],"dc:description.degree":["Master of Science"],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/10919/88591"],"dc:language.iso":["en_US"],"dc:publisher":["Virginia Polytechnic Institute and State University"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Distribution of Rotifera and Cladocera in a regulated river system"],"dc:type":["Thesis"],"dc:type.dcmitype":["Text"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:19:01Z"}