Abstract
A SURVEY of the parasites of the trout, char, stickleback, minnow and eel in Llyn Padarn was begun in April 1963. The trout Salmo trutta L. and the char Salvelinus alpinus perisii (Günther) were heavily infected by the plerocercoids of Diphyllobothrium ditremum (Creplin, 1825) and Diphyllobothrium dendriticum (Nitzsch, 1824) which were found encapsuled in the viscera and body wall. The parasite survey was continued in 1964 when a marked fall in the occurrence of Diphyllobothrium plerocercoids in the trout was noted. Observations made in 1965 showed a further fall in the numbers of the plerocercoids in the trout. The numbers of plerocercoids present in the char remained more or less constant throughout the period of investigation (see Table 1).
Similar content being viewed by others
Article PDF
References
Fraser, P. G., J. Helminthol., 34, 59 (1960).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
POWELL, A., CHUBB, J. A Decline in the Occurrence of Diphyllobothrium Plerocercoids in the Trout Salmotrutta L. of Llyn Padarn, Caernarvonshire. Nature 211, 439 (1966). https://doi.org/10.1038/211439a0
Issue Date:
DOI: https://doi.org/10.1038/211439a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.