Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-23T00:52:48.040Z Has data issue: false hasContentIssue false
  • English
  • Français

The population dynamics of the monogenean gill parasite Discocotyle sagittata Leuckart on Windermere trout, Salmo trutta, L.

Published online by Cambridge University Press:  10 June 2015

J. E. Paling
J. E. Paling*
Affiliation:
Department of Zoology and Comparative Physiology, The University, Birmingham 15, U.K.
Get access Rights & Permissions [Opens in a new window]

Extract

Relatively little is known of the way in which the populations of monogenean parasites are related to the behaviour and physiology of their hosts or how such populations vary in composition over the year. Bychowsky (1957, trans. Hargis, 1961, p. 108) has described the results of studies upon six different fish hosts and parasites, while Llewellyn (1962) has studied two other species of Monogenea living on one host species. In all these investigations, the various ecological factors which influence the life cycles of the parasites have been determined.

Dogiel, Petrushevski & Polyanski (1961, p. 14) referred to a previous population study of Discocotyle sagittata on a host Coregonus lavaretus in Lake Ladoga, Russia. The parasite was said to breed in July and August, while in September broods of young and old parasites overlapped. The large individuals disappeared in October and November and this ‘death of the older generation’ was taken to indicate that the parasites had a life span of only one year.

The only relevant work available when the present study was commenced was the population study of the monogeneans Gastrocotyle trachuri and Pseudaxine trachuri by Llewellyn and as this concerned a marine host, it was of obvious interest to investigate the population dynamics of a parasite of a freshwater fish. Discocotyle sagittata was chosen because the biology of the British host, the brown trout (a different host from that in the Russian study of Discocotyle), has been intensively studied for many years. It was thought that this would be of advantage in attempting to relate any seasonal fluctuations in the parasite population to the biology of the host.

Type
Research Article
Information
Parasitology , Volume 55 , Issue 4 , November 1965 , pp. 667 - 694
Copyright
Copyright © Cambridge University Press 1965

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Allen, K. R. (1938). Some observations on the biology of the trout (Salmo trutta) in Windermere. J. Anim. Ecol. 7, 333–49.CrossRefGoogle Scholar
Ball, J. N. & Jones, J. W. (1962). On the movements of the brown trout of Llyn Tegid. Proc. zool. Soc. Lond. 138, 205–24.CrossRefGoogle Scholar
Bychowsky, B. E. (1957, trans. Hargis, W. J., 1961). Monogenetic Trematodes, their Classification and Phylogeny, 627 pp. Washington: American Institute of Biological Sciences.Google Scholar
Chubb, J. C. (1963). On the characterization of the parasite fauna of the fish of Llyn Tegid. Proc. zool. Soc. Lond. 141, 609–21.CrossRefGoogle Scholar
Dobson, C. (1961). Certain aspects of the host-parasite relationship of Nematospiroides dubius (Baylis). I. Resistance of male and female mice to experimental infections. Parasitology, 51, 173–9.CrossRefGoogle ScholarPubMed
Dogiel, V. A., Petrushevski, G. K. & Polyanski, Y.I. (1958, trans. Kabata, Z., 1961). Parasitology of Fishes, 384 pp. Edinburgh: Oliver and Boyd.Google Scholar
Frost, W. E. & Brown, M. E. (1965). The Brown Trout. London: Collins. (In the Press.)Google Scholar
Lees, E. & Bass, L. (1960). Sex hormones as a possible factor influencing the level of parasitization in frogs. Nature, Lond., 188, 1207–8.CrossRefGoogle ScholarPubMed
Leuckart, F. S. (1842). Helminthologische Beiträge. Zoologische Bruchstüko. 3. Freiburg.Google Scholar
Lindroth, A. (1955). Distribution, territorial behaviour and movements of sea trout fry in the River Indalsälven. Rep. Inst. Freshwater Res. Drottningholm. 36, 104–19.Google Scholar
Llewellyn, J. (1957). The larvae of some monogenetic trematode parasitos of Plymouth fishes. J. mar. biol. Ass. U.K. 38, 461–7.CrossRefGoogle Scholar
Llewellyn, J. (1962). The life histories and population dynamics of monogenean gill parasites of Trachurus trachurus (L.). J. mar. biol. Ass. U.K. 42, 587–600.CrossRefGoogle Scholar
Price, E. W. (1943). North American monogenetic trematodes. 7. The family Discocotylidae. Proc. helminth. Soc. Wash. 10, 10–15.Google Scholar
Slinn, D. J. (1963). Occurrence of Discocotyle sagittata on sea trout. Nature, Lond., 197, 306.CrossRefGoogle Scholar
Sproston, N. G. (1946). Synopsis of the monogenetic trematodes. Trans. zool. Soc. Lond. 25, 185–600.CrossRefGoogle Scholar
Thomas, J. D. (1964 a). Studies on the growth of trout, Salmo trutta L. from four contrasting habitats. Proc. zool. Soc. Lond. 142, 1–51.CrossRefGoogle Scholar
Thomas, J. D. (1964 b). A comparison between the helminth burdens of male and female brown trout, Salmo trutta L., from a natural population in the River Toify, West Wales. Parasitology, 54, 263–74.CrossRefGoogle Scholar
Yamaguti, S. (1963). Systema Helminthum. 4. Monogenea and Aspidocotylea, 699 pp. London: Interscience.Google Scholar