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The sites occupied by the acanthocephalan Pomphorhynchus laevis in the alimentary canal of fish

Published online by Cambridge University Press:  06 April 2009

C. R. Kennedy ,
P. F. Broughton  and
P. M. Hine
C. R. Kennedy
Affiliation:
Department of Biological Sciences, The University, Exeter, U.K.
P. F. Broughton*
Affiliation:
Department of Biological Sciences, The University, Exeter, U.K.
P. M. Hine*
Affiliation:
Department of Biological Sciences, The University, Exeter, U.K.
*
*Waliaceville Animal Research Centre, Upper Hutt, New Zealand.
†Fisheries Research Division, P.O. Box 19062, Wellington, New Zealand.
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Extract

The distribution of the acanthocephalan Pomphorhynchus laevis along the alimentary tract of several species of freshwater fish was studied in both natural and experimental infections. The parasite exhibits a clear preference for a particular region of the alimentary canal, which differs from host species to host species, but it is capable of surviving in all regions of the intestine. In some host species, but not in all, its growth rate may be reduced in regions outside of the preferred site. The parasite remains in the same site throughout the period of infection, emigrations occurring only preparatory to complete loss of the parasite from the host. The presence of cestodes in the region of the preferred site has no effect upon the distribution of the parasite. At high levels of infection the range of the parasite's distribution is extended. The feeding of larval parasites to fish by stomach tube also leads to an extension of range, whereas when fish are allowed to feed on cystacanths removed from their intermediate host the parasite establishes in a more anterior position than usual and in a site that it does not occupy to any extent in natural infections. It is concluded that the distribution of P. laevis in the alimentary canal offish is determined primarily by the process of liberation, activation and establishment of the parasite, and that it normally attaches in the first available space and remains there. Unsuitable physico-chemical or feeding conditions affect only its growth, not the site that it occupies. It is suggested that P. laevis may be atypical in this respect.

Type
Research Article
Information
Parasitology , Volume 72 , Issue 2 , April 1976 , pp. 195 - 206
Copyright
Copyright © Cambridge University Press 1976

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References

Al-Hussaini, A. H. (1949). On the functional morphology of the alimentary tract of some fish in relation to differences in their feeding habits. Part I. Anatomy and Histology. Quarterly Journal of Microscopical Science 90, 109–39.Google Scholar
Amin, O. M. (1975). Host and seasonal associations of Acanthocephalus parksidei Amin, 1974 (Acanthocephala, Echinorhynchidae) in Wisconsin fishes. Journal of Parasitology 61, 318–29.Google Scholar
Awachie, J. B. E. (1966). The development and life history of Echinorhynchus truttae Schrank, 1788 (Acanthocephala). Journal of Helminthology 40, 11–32.Google Scholar
Brottghton, P. F. (1974). Specificity of Pomphorhynchus laevis (Acanthocephala) with special reference to growth in trout and in vitro. M.Sc. Thesis, University of Exeter.Google Scholar
Crompton, D. W. T. (1973). The sites occupied by some parasitic helminths in the alimentary tract of vertebrates. Biological Reviews 48, 27–83.CrossRefGoogle ScholarPubMed
Hine, P.M. & Kennedy, C. R. (1974). Observations on the distribution, specificity and pathogenicity of the acanthocephalan Pomphorhynchus laevis (Muller). Journal of Fish Biology 6, 521–35.CrossRefGoogle Scholar
Hopkins, C. A. (1970). Location-specificity in adult tapeworms with special reference to Hymenolepis diminuta. Journal of Parasitology 56, 561–4.Google ScholarPubMed
Kennedy, C. R. (1972). The effects of temperature and other factors upon the establishment and survival of Pomphorhynchus laevis (Acanthocephala) in goldfish, Carrassius auratus. Parasitology 65, 283–94.CrossRefGoogle Scholar
Nicholas, W. L. & Hynes, H. B. N. (1958). Studies on Polymorphus minutus (Goeze, 1782) (Acanthocephala) as a parasite of the domestic duck. Annals of Tropical Medicine and Parasitology 52, 36–47.CrossRefGoogle ScholarPubMed
Tedla, S. & Fernando, C. H. (1970). Some remarks on the ecology of Echinorhynchus salmonis Muller, 1784. Canadian Journal of Zoology 48, 317–21.CrossRefGoogle ScholarPubMed