{"id":{"repo_id":"texas-state","oai_identifier":"oai:digital.library.txst.edu:10877/3123"},"canonical_url":"https://search.dev.ndltd.org/etd/texas-state/oai:digital.library.txst.edu:10877/3123","repository":{"repo_id":"texas-state","name":"Texas State University","base_url":"https://digital.library.txst.edu/server/oai/request"},"display":{"title":"Occurrence and Impact of the Asian Fish Tapeworm Bothriocephalus acheilognathi in the Rio Grande (Rio Bravo del Norte)","abstract":"Bothriocephalus acheilognathi is native to Asia and was introduced worldwide as an incidental hitchhiker of its native host, Ctenopharyngodon idella (Andrews et al. 1981; Hoffman 1999). It is established in ten states in USA with the most recent discovery in the Rio Grande in Texas (Bean et al. 2007). Occurrence of this exotic tapeworm in the Rio Grande potentially is detrimental to native fishes, causing intestinal blockage and perforation, hemorrhaging, reduced growth, significantly decreased survivorship, and mortality (Scott and Grizzle 1979; Hoffman 1980; Granath and Esch 1983; Hoole and Nisan 1994; Hansen et al. 2006). Endemic fishes of conservation concern in the Rio Grande include Hybognathus amarus, Dionda diaboli, Notropis jemezanus, and Notropis Chihuahua and likely are affected by the tapeworm. The purpose of the first part of this study was to examine the presence and mean intensity of B. acheilognathi in Cyprinella lutrensis to determine spatial and temporal patterns in several reaches of the Rio Grande. The study also examined seasonal trends in tapeworm maturation and intraspecific competition. The second study assessed impacts of B. acheilognathi infection on condition and reproduction in C. lutrensis to make inferences about potential impacts on other endemic cyprinid species.","abstract_html":"Bothriocephalus acheilognathi is native to Asia and was introduced worldwide as an incidental hitchhiker of its native host, Ctenopharyngodon idella (Andrews et al. 1981; Hoffman 1999). It is established in ten states in USA with the most recent discovery in the Rio Grande in Texas (Bean et al. 2007). Occurrence of this exotic tapeworm in the Rio Grande potentially is detrimental to native fishes, causing intestinal blockage and perforation, hemorrhaging, reduced growth, significantly decreased survivorship, and mortality (Scott and Grizzle 1979; Hoffman 1980; Granath and Esch 1983; Hoole and Nisan 1994; Hansen et al. 2006). Endemic fishes of conservation concern in the Rio Grande include Hybognathus amarus, Dionda diaboli, Notropis jemezanus, and Notropis Chihuahua and likely are affected by the tapeworm. The purpose of the first part of this study was to examine the presence and mean intensity of B. acheilognathi in Cyprinella lutrensis to determine spatial and temporal patterns in several reaches of the Rio Grande. The study also examined seasonal trends in tapeworm maturation and intraspecific competition. The second study assessed impacts of B. acheilognathi infection on condition and reproduction in C. lutrensis to make inferences about potential impacts on other endemic cyprinid species.","abstract_has_math":false,"creators":["Bean, Megan Gardiner"],"institution":"Texas State University","degree_name":"Master of Science","degree_level":"Masters","degree_discipline":"Biology","degree_department":null,"school":null,"contributors":[],"advisors":["Bonner, Timothy H."],"committee_chairs":[],"committee_members":["Weckerly, Floyd W.","Groeger, Alan W."],"year":2008,"date_issued":"2008-06","date_published":"2008-06","updated_at":"2026-07-27T21:22:55Z","subjects":["Bothriocephalus acheilognathi","Rio Grande","native fish","fish tapeworm","cyprinids","impact on host","fish reproduction","Cyprinella lutrensis"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10877/3123","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Bonner, Timothy H."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Weckerly, Floyd W.","Groeger, Alan W."]},{"key":"dc:creator","label":"Author","values":["Bean, Megan Gardiner"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2008-09-29T19:00:22Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2012-02-24T10:09:04Z"]},{"key":"dc:date.issued","label":"Date","values":["2008-06"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"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"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Texas State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Bothriocephalus acheilognathi","Rio Grande","native fish","fish tapeworm","cyprinids","impact on host","fish reproduction","Cyprinella lutrensis"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10877/3123"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Bothriocephalus acheilognathi is native to Asia and was introduced worldwide as an incidental hitchhiker of its native host, Ctenopharyngodon idella (Andrews et al. 1981; Hoffman 1999). It is established in ten states in USA with the most recent discovery in the Rio Grande in Texas (Bean et al. 2007). Occurrence of this exotic tapeworm in the Rio Grande potentially is detrimental to native fishes, causing intestinal blockage and perforation, hemorrhaging, reduced growth, significantly decreased survivorship, and mortality (Scott and Grizzle 1979; Hoffman 1980; Granath and Esch 1983; Hoole and Nisan 1994; Hansen et al. 2006). Endemic fishes of conservation concern in the Rio Grande include Hybognathus amarus, Dionda diaboli, Notropis jemezanus, and Notropis Chihuahua and likely are affected by the tapeworm. The purpose of the first part of this study was to examine the presence and mean intensity of B. acheilognathi in Cyprinella lutrensis to determine spatial and temporal patterns in several reaches of the Rio Grande. The study also examined seasonal trends in tapeworm maturation and intraspecific competition. The second study assessed impacts of B. acheilognathi infection on condition and reproduction in C. lutrensis to make inferences about potential impacts on other endemic cyprinid species."]},{"key":"dc:format","label":"Dc Format","values":["Text"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["1 file (.pdf)"]},{"key":"dc:title","label":"Title","values":["Occurrence and Impact of the Asian Fish Tapeworm Bothriocephalus acheilognathi in the Rio Grande (Rio Bravo del Norte)"]}]}],"canonical_facts":{"dc:contributor.advisor":["Bonner, Timothy H."],"dc:contributor.committeemember":["Weckerly, Floyd W.","Groeger, Alan W."],"dc:creator":["Bean, Megan Gardiner"],"dc:date.accessioned":["2008-09-29T19:00:22Z"],"dc:date.available":["2012-02-24T10:09:04Z"],"dc:date.issued":["2008-06"],"dc:description.abstract":["Bothriocephalus acheilognathi is native to Asia and was introduced worldwide as an incidental hitchhiker of its native host, Ctenopharyngodon idella (Andrews et al. 1981; Hoffman 1999). It is established in ten states in USA with the most recent discovery in the Rio Grande in Texas (Bean et al. 2007). Occurrence of this exotic tapeworm in the Rio Grande potentially is detrimental to native fishes, causing intestinal blockage and perforation, hemorrhaging, reduced growth, significantly decreased survivorship, and mortality (Scott and Grizzle 1979; Hoffman 1980; Granath and Esch 1983; Hoole and Nisan 1994; Hansen et al. 2006). Endemic fishes of conservation concern in the Rio Grande include Hybognathus amarus, Dionda diaboli, Notropis jemezanus, and Notropis Chihuahua and likely are affected by the tapeworm. The purpose of the first part of this study was to examine the presence and mean intensity of B. acheilognathi in Cyprinella lutrensis to determine spatial and temporal patterns in several reaches of the Rio Grande. The study also examined seasonal trends in tapeworm maturation and intraspecific competition. The second study assessed impacts of B. acheilognathi infection on condition and reproduction in C. lutrensis to make inferences about potential impacts on other endemic cyprinid species."],"dc:format":["Text"],"dc:format.medium":["1 file (.pdf)"],"dc:identifier.uri":["https://hdl.handle.net/10877/3123"],"dc:language.iso":["en"],"dc:subject":["Bothriocephalus acheilognathi","Rio Grande","native fish","fish tapeworm","cyprinids","impact on host","fish reproduction","Cyprinella lutrensis"],"dc:title":["Occurrence and Impact of the Asian Fish Tapeworm Bothriocephalus acheilognathi in the Rio Grande (Rio Bravo del Norte)"],"dc:type":["Thesis"],"thesis:degree_discipline":["Biology"],"thesis:degree_level":["Masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Texas State University"]},"updated_at":"2026-07-27T21:22:55Z"}