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Occurrence of Psorospermium haeckeli in the stone crayfish Austropotamobius torrentium from a population naturally mixed with the noble crayfish Astacus astacus

1996; Inter-Research; Volume: 25; Linguagem: Inglês

10.3354/dao025233

1616-1580

Günter Vogt, Monika Keller, Dirk Brandis,

Invertebrate Immune Response Mechanisms

DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials DAO 25:233-238 (1996) - doi:10.3354/dao025233 Occurrence of Psorospermium haeckeli in the stone crayfish Austropotamobius torrentium from a population naturally mixed with the noble crayfish Astacus astacus Vogt G, Keller M, Brandis D The crayfish parasite 'Psorospermium haeckeli', which supposedly includes several species, is reported for the first time from the stone crayfish Austropotamobius torrentium. The infected specimens were from the Kammlach river in Bavaria (Germany), a place where A. torrentium and the noble crayfish Astacus astacus have coexisted for more than 20 yr. Screening of the mixed crayfish population for P. haeckeli revealed that both species were infected with the elongate morphotype of P. haeckeli which is typical of A. astacus. The distribution pattern of the parasite was similar in both species; most spores were in the collagenous wall of the blood vessels and the subepidermal connective tissue underneath the carapace. In the noble crayfish there was practically no immune response against P. haeckeli, whereas in the stone crayfish ca 10% of the spores were encapsulated by haemocytes, and approximately 1% were melanised. Since stone crayfish collected from other creeks were free of P. haeckeli, we presume that the parasite may have been transmitted to A. torrentium from A. astacus. Psorospermium haeckeli . Astacus astacus . Austropotamobius torrentium . Crayfish . Parasite Full text in pdf format PreviousExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in DAO Vol. 25, No. 3. Publication date: June 06, 1996 Print ISSN:0177-5103; Online ISSN:1616-1580 Copyright © 1996 Inter-Research.