Genetic variability in Hysterothylacium aduncum, a raphidascarid nematode isolated from sprat (Sprattus sprattus) of different geographical areas of the northeastern Atlantic

Klimpel, Sven; Kleinertz, Sonja; Hanel, Reinhold; Rueckert, Sonja

Abstract

Species of the genus Hysterothylacium are among the most common marine nematode fish parasites in the northern Atlantic. Due to recent findings of cryptic speciation in other parasitic ascaridoid nematodes, a similar pattern of sibling species was hypothesized also for Hysterothylacium aduncum. By investigating a 886- to 890-bp-long genomic DNA fragment including ITS-1, 5.8S rDNA and ITS-2 of 40 specimens of H. aduncum of sprat (Sprattus sprattus) of four different biogeographical regions (North Sea, English Channel, Bay of Biscay, Adriatic Sea), we could not detect significant genetic variability and therefore cryptic speciation. Nevertheless, while ITS-1 and 5.8S rDNA sequences were identical for all analysed specimens, ITS-2 sequences showed a population-specific pattern with the differentiation of an English Channel/Bay of Biscay group from a North Sea/Mediterranean Sea group.

Citation

Klimpel, S., Kleinertz, S., Hanel, R., & Rueckert, S. (2007). Genetic variability in Hysterothylacium aduncum, a raphidascarid nematode isolated from sprat (Sprattus sprattus) of different geographical areas of the northeastern Atlantic. Parasitology Research, 101(5), (1425-1430). doi:10.1007/s00436-007-0662-0. ISSN 0932-0113

• Journal Article Type: Article
• Online Publication Date: Aug 3, 2007
• Publication Date: Sep 4, 2007
• Deposit Date: Sep 25, 2013
• Print ISSN: 0932-0113
• Electronic ISSN: 1432-1955
• Publisher: BMC
• Peer Reviewed: Peer Reviewed
• Volume: 101
• Issue: 5
• Pages: 1425-1430
• DOI: https://doi.org/10.1007/s00436-007-0662-0
• Keywords: Insect Science; General Veterinary; Parasitology; Infectious Diseases; General Medicine
• Public URL: http://researchrepository.napier.ac.uk/id/eprint/6419
• Publisher URL: http://dx.doi.org/10.1007/s00436-007-0662-0