{"id":{"repo_id":"mo-state","oai_identifier":"oai:bearworks.missouristate.edu:theses-2292"},"canonical_url":"https://search.dev.ndltd.org/etd/mo-state/oai:bearworks.missouristate.edu:theses-2292","repository":{"repo_id":"mo-state","name":"Missouri State University","base_url":"https://bearworks.missouristate.edu/do/oai/"},"display":{"title":"Variability in Growth and Age of the Duskystripe Shiner Along a Stream Gradient","abstract":"Research was conducted to describe the variability in growth and age structure of the duskystripe shiner (Luxilus pilsbryi) along a stream gradient. Duskystripe shiners (n= 600) were sampled from eleven sites representing 4 stream orders. Fish were collected in the spring of 2010 using seining techniques, and the physical assessment of fish and habitat was performed within 24 hours after collection. Shiners were categorized into populations based on stream order for statistical analysis. Ages were determined using the asterisci otoliths (inner ear bones), based on previously validated techniques. Significant correlations existed between stream order and fish growth rate, condition, and longevity. Upstream portions of the river contained older shiners than downstream portions. Male and immature shiners had faster growth rates in upstream portions of the river. Female gonadosomatic indices were higher in upstream portions of the river. Shiners had higher condition factors in upstream portions of the river. Habitat conditions were relatively similar along the river. The findings suggest that duskystripe shiners in headwaters are better able to use resources to enhance their physical condition compared to fishes in higher order stream regions.","abstract_html":"Research was conducted to describe the variability in growth and age structure of the duskystripe shiner (Luxilus pilsbryi) along a stream gradient. Duskystripe shiners (n= 600) were sampled from eleven sites representing 4 stream orders. Fish were collected in the spring of 2010 using seining techniques, and the physical assessment of fish and habitat was performed within 24 hours after collection. Shiners were categorized into populations based on stream order for statistical analysis. Ages were determined using the asterisci otoliths (inner ear bones), based on previously validated techniques. Significant correlations existed between stream order and fish growth rate, condition, and longevity. Upstream portions of the river contained older shiners than downstream portions. Male and immature shiners had faster growth rates in upstream portions of the river. Female gonadosomatic indices were higher in upstream portions of the river. Shiners had higher condition factors in upstream portions of the river. Habitat conditions were relatively similar along the river. The findings suggest that duskystripe shiners in headwaters are better able to use resources to enhance their physical condition compared to fishes in higher order stream regions.","abstract_has_math":false,"creators":["Recktenwald, Nathan Michael"],"institution":null,"degree_name":"Master of Science in Biology","degree_level":"Masters","degree_discipline":"Biology","degree_department":null,"school":null,"contributors":["Daniel Beckman"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-07-01T07:00:00Z","date_published":"2011-07-01T07:00:00Z","updated_at":"2026-07-24T03:16:17Z","subjects":["duskystripe shiner","otolith","growth","age","stream order","Biology"],"languages":[],"rights":["© Nathan Michael Recktenwald"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://bearworks.missouristate.edu/theses/1291","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Daniel Beckman"]},{"key":"dc:creator","label":"Author","values":["Recktenwald, Nathan Michael"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"thesis:degree_discipline","label":"Discipline","values":["Biology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Biology"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["duskystripe shiner","otolith","growth","age","stream order","Biology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["© Nathan Michael Recktenwald"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://bearworks.missouristate.edu/theses/1291"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Research was conducted to describe the variability in growth and age structure of the duskystripe shiner (Luxilus pilsbryi) along a stream gradient. Duskystripe shiners (n= 600) were sampled from eleven sites representing 4 stream orders. Fish were collected in the spring of 2010 using seining techniques, and the physical assessment of fish and habitat was performed within 24 hours after collection. Shiners were categorized into populations based on stream order for statistical analysis. Ages were determined using the asterisci otoliths (inner ear bones), based on previously validated techniques. Significant correlations existed between stream order and fish growth rate, condition, and longevity. Upstream portions of the river contained older shiners than downstream portions. Male and immature shiners had faster growth rates in upstream portions of the river. Female gonadosomatic indices were higher in upstream portions of the river. Shiners had higher condition factors in upstream portions of the river. Habitat conditions were relatively similar along the river. The findings suggest that duskystripe shiners in headwaters are better able to use resources to enhance their physical condition compared to fishes in higher order stream regions."]},{"key":"dc:title","label":"Title","values":["Variability in Growth and Age of the Duskystripe Shiner Along a Stream Gradient"]}]}],"canonical_facts":{"dc:contributor":["Daniel Beckman"],"dc:creator":["Recktenwald, Nathan Michael"],"dc:description.abstract":["Research was conducted to describe the variability in growth and age structure of the duskystripe shiner (Luxilus pilsbryi) along a stream gradient. Duskystripe shiners (n= 600) were sampled from eleven sites representing 4 stream orders. Fish were collected in the spring of 2010 using seining techniques, and the physical assessment of fish and habitat was performed within 24 hours after collection. Shiners were categorized into populations based on stream order for statistical analysis. Ages were determined using the asterisci otoliths (inner ear bones), based on previously validated techniques. Significant correlations existed between stream order and fish growth rate, condition, and longevity. Upstream portions of the river contained older shiners than downstream portions. Male and immature shiners had faster growth rates in upstream portions of the river. Female gonadosomatic indices were higher in upstream portions of the river. Shiners had higher condition factors in upstream portions of the river. Habitat conditions were relatively similar along the river. The findings suggest that duskystripe shiners in headwaters are better able to use resources to enhance their physical condition compared to fishes in higher order stream regions."],"dc:identifier":["https://bearworks.missouristate.edu/theses/1291"],"dc:rights":["© Nathan Michael Recktenwald"],"dc:subject":["duskystripe shiner","otolith","growth","age","stream order","Biology"],"dc:title":["Variability in Growth and Age of the Duskystripe Shiner Along a Stream Gradient"],"thesis:degree_discipline":["Biology"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science in Biology"]},"updated_at":"2026-07-24T03:16:17Z"}