title: First record of Bothriocephalus acheilognathi in the Rio Grande with comparative analysis of ITS2 and V4-18S rRNA gene sequences.
abstract: Bothriocephalus acheilognathi is an introduced tapeworm in North America often reported as a serious ecological threat to native fishes. In this paper, we report the first record of B. acheilognathi in the Big Bend region of the Rio Grande in Texas (known as the Río Bravo del Norte in Mexico). Identification of B. acheilognathi was confirmed by morphologic and genetic techniques (sequences of ITS2 and V4-18S rRNA genes). Its prevalence was 27% and its intensity ranged from 1 to 5 individuals in a January 2006 collection of 115 red shiners Cyprinella lutrensis. In addition, it was found in the Tamaulipas shiner Notropis braytoni, a Rio Grande endemic and a new host record. The occurrence of B. acheilognathi might have negative ecological impacts on endemic fishes in the Rio Grande. Several of the fishes that could serve as definitive hosts are of conservation concern. Its occurrence also might affect the success of reintroducing the Rio Grande silvery minnow Hybognathus amarus, which is federally listed as endangered, in this portion of the Rio Grande.
authors.affiliation: Department of Biology, Aquatic Station, Texas State University-San Marcos, 601 University Drive, San Marcos, Texas 78666, USA. megan.bean@txstate.edu
authors.forename: Megan G
authors.initials: MG
authors.lastname: Bean
authors.forename: Andrea
authors.initials: A
authors.lastname: Skeríkova
authors.forename: Timothy H
authors.initials: TH
authors.lastname: Bonner
authors.forename: Tomás
authors.initials: T
authors.lastname: Scholz
authors.forename: David G
authors.initials: DG
authors.lastname: Huffman
mesh_terms: D000818:Animals; D002589:Cestoda / Q000145:classification / Q000235:genetics*; D002590:Cestode Infections / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary*; D003247:Conservation of Natural Resources; D003530:Cyprinidae / Q000469:parasitology*; D005393:Fish Diseases / Q000453:epidemiology* / Q000469:parasitology; D005399:Fishes / Q000469:parasitology; D010802:Phylogeny; D015995:Prevalence; D018510:RNA, Helminth / Q000032:analysis; D013045:Species Specificity; D013781:Texas / Q000453:epidemiology
chemical_list: D018510:RNA, Helminth