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Distinct evolutionary lineages of Schistocephalus parasites infecting co-occurring sculpin and stickleback fishes in Alaska.
Heins, David C; Moody, Kristine N; Arostegui, Martin C; Harmon, Brian S; Blum, Michael J; Quinn, Thomas P.
Afiliação
  • Heins DC; Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA 70118, USA.
  • Moody KN; Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA 70118, USA.
  • Arostegui MC; Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
  • Harmon BS; Department of Ecology & Evolutionary Biology, University of Tennessee, Knoxville, TN 37996, USA.
  • Blum MJ; Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
  • Quinn TP; School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98103, USA.
Parasitology ; 151(6): 626-633, 2024 May.
Article em En | MEDLINE | ID: mdl-38719483
ABSTRACT
Sculpins (coastrange and slimy) and sticklebacks (ninespine and threespine) are widely distributed fishes cohabiting 2 south-central Alaskan lakes (Aleknagik and Iliamna), and all these species are parasitized by cryptic diphyllobothriidean cestodes in the genus Schistocephalus. The goal of this investigation was to test for host-specific parasitic relationships between sculpins and sticklebacks based upon morphological traits (segment counts) and sequence variation across the NADH1 gene. A total of 446 plerocercoids was examined. Large, significant differences in mean segment counts were found between cestodes in sculpin (mean = 112; standard deviation [s.d.] = 15) and stickleback (mean = 86; s.d. = 9) hosts within and between lakes. Nucleotide sequence divergence between parasites from sculpin and stickleback hosts was 20.5%, and Bayesian phylogenetic analysis recovered 2 well-supported clades of cestodes reflecting intermediate host family (i.e. sculpin, Cottidae vs stickleback, Gasterosteidae). Our findings point to the presence of a distinct lineage of cryptic Schistocephalus in sculpins from Aleknagik and Iliamna lakes that warrants further investigation to determine appropriate evolutionary and taxonomic recognition.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Filogenia / Lagos / Cestoides / Infecções por Cestoides / Smegmamorpha / Doenças dos Peixes Idioma: En Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Filogenia / Lagos / Cestoides / Infecções por Cestoides / Smegmamorpha / Doenças dos Peixes Idioma: En Ano de publicação: 2024 Tipo de documento: Article