Parasitology Research

, Volume 117, Issue 4, pp 1079–1086 | Cite as

Digeneans of northern fur seals Callorhinus ursinus (Pinnipedia: Otariidae) from five subpopulations on St. Paul Island, Alaska

  • T. A. Kuzmina
  • V. V. Tkach
  • T. R. Spraker
  • E. T. Lyons
  • O. Kudlai
Original Paper


A parasitological survey of 651 northern fur seals Callorhinus ursinus L. from five subpopulations was conducted on St. Paul Island, Alaska, during July–August 2012–2014. Digenean trematodes were found in 210 of 651 fur seals with a total prevalence of 32.3%. Intensity of infection varied from 1 to 1540 parasites with mean intensity 18.4 ± 111.1 SD and median intensity of 2 specimens per host. Significant differences in prevalence and intensity of infection in northern fur seals between separate rookeries was not observed (Mann–Whitney test; p > 0.05). Four species of digeneans belonging to the families Heterophyidae (Apophallus zalophi Price, 1932, Phocitrema fusiforme Goto and Ozaki, 1930, and Galactosomum ubelakeri (Dailey, 1969)) and Troglotrematidae (Nanophyetus salmincola (Chapin, 1926)) were found. Nanophyetus salmincola is reported from C. ursinus for the first time. We obtained partial 28S rDNA sequences for all digenean species and conducted molecular phylogenetic analysis to demonstrate their phylogenetic relationships.


Trematoda Heterophyidae Nanophyetus Callorhinus ursinus 28S rDNA sequences Molecular phylogeny 



The authors thank Dr. Yuriy Kuzmin from the Institute of Zoology NAS of Ukraine for his useful comments and assistance with preparation of the manuscript.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.I. I. Schmalhausen Institute of Zoology NAS of UkraineKyivUkraine
  2. 2.Department of BiologyUniversity of North DakotaGrand ForksUSA
  3. 3.W. Stefanski Institute of ParasitologyPolish Academy of SciencesWarsawPoland
  4. 4.Department of Microbiology, Immunology and Pathology, College of Veterinary, Medicine and Biomedical SciencesColorado State UniversityFort CollinsUSA
  5. 5.Department of Veterinary Science, Gluck Equine Research CenterUniversity of KentuckyLexingtonUSA
  6. 6.Water Research Group, Unit for Environmental Sciences and Management, Potchefstroom CampusNorth-West UniversityPotchefstroomSouth Africa
  7. 7.Nature Research CentreInstitute of EcologyVilniusLithuania

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