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Ichthyocotylurus erraticus (Digenea: Strigeidae): factors affecting infection intensity and the effects of infection on pollan (Coregonus autumnalis), a glacial relict fish

Published online by Cambridge University Press:  10 June 2005

School of Environmental Sciences, University of Ulster, Coleraine BT52 1SA, UK Current address: Department of Physiological Ecology, Max Planck Institute for Limnology, Postfach 165, 24302 Plön, Germany.
School of Environmental Sciences, University of Ulster, Coleraine BT52 1SA, UK


Lough Neagh pollan are heavily infected with the strigeid Ichthyocotylurus erraticus, with 100% prevalence and median infection intensities of 600+ metacercariae in the pericardial cavity of mature fish. Female fish were more heavily infected than males. Infection intensity, which rose in summer, varied with pollan size, year, sampling bay within the lough and water depth within bays. Heavily infected pollan were caught further offshore than lightly infected fish. Spatial variation in pollan infection intensity corresponded to variation in the abundance of the first intermediate host, Valvata snails. The data suggest that heavily infected fish had lower food intakes. Parasitism reduced condition and liver size in male fish but condition in heavily parasitized females increased. Infection intensity was greater in larger fish of a given age. These patterns are discussed in the context of risks and rewards. The data suggest that inshore waters in summer are the preferred habitat of pollan and that the greater infection intensity of offshore fish results from their reduced competitive ability as a consequence of parasitism and the increased risk of infection there.

Research Article
© 2005 Cambridge University Press

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Bean, C. W. and Winfield, I. J. ( 1989). Biological and ecological effects of a Ligula intestinalis (L.) infestation of the gudgeon, Gobio gobio (L.), in Lough Neagh, Northern Ireland. Journal of Fish Biology 34, 135147.Google Scholar
Bean, C. W. and Winfield, I. J. ( 1992). Influences of the tapeworm Ligula intestinalis (L.) on the spatial distributions of juvenile roach Rutilus rutilus (L.) and gudgeon Gobio gobio (L.) in Lough Neagh, Northern Ireland. Netherlands Journal of Zoology 42, 416429.Google Scholar
Bell, A. S., Sommerville, C. and Gibson, D. I. ( 1999). Cercarial emergence of Ichthyocotylurus erraticus (Rudolphi, 1809), I. variegatus (Creplin, 1825) and Apatemon gracilis (Rudolphi, 1819) (Digenea: Strigeidae): contrasting responses to light[ratio ]dark cycling. Parasitology Research 85, 387392.Google Scholar
Bigsby, E. J. ( 2000). Interactions between macro-invertebrates, fish and diving ducks in Lough Neagh. Unpublished D.Phil. thesis, University of Ulster.
Carter, C. E. and Griffiths, D. ( 2001). A study of environmental conditions in south-east Lough Neagh prior to the relocation of sewage outfalls. Report presented to The Environment and Heritage Service, Northern Ireland.
Chellappa, S., Huntingford, F. A., Strang, R. H. C. and Thomson, R. Y. ( 1995). Condition factor and hepatosomatic index as estimates of energy status in male three-spined stickleback. Journal of Fish Biology 47, 775787.CrossRefGoogle Scholar
Cramp, S. and Simmons, K. E. L. ( 1983). Handbook of the Birds of Europe, the Middle East and North Africa: the Birds of the Western Palearctic. Vol. 3. Oxford University Press, Oxford.
Cryer, M., Peirson, G. and Townsend, C. R. ( 1986). Reciprocal interactions between roach, Rutilus rutilus (L.), and zooplankton in a small lake: prey dynamics and fish growth and recruitment. Limnology and Oceanography 31, 10221038.Google Scholar
Dolezel, M. C. and Crompton, D. W. T. ( 2000). Platyhelminth infections in powan, Coregonus lavaretus (L.), from Loch Eck and Loch Lomond, Scotland. Helminthologia 37, 147152.Google Scholar
Faulkner, M., Halton, D. W. and Montgomery, W. I. ( 1989). Sexual, seasonal and tissue variation in the encystment of Cotylurus variegatus metacercariae in perch, Perca fluviatilis. International Journal for Parasitology 19, 285290.CrossRefGoogle Scholar
Gaffikin, P. M. ( 1939). An investigation of the life history and bionomics of the Coregonus pollan of Lough Neagh. M.Sc., Queen's University, Belfast.
Hamrin, S. F. and Persson, L. ( 1986). Asymmetrical competition between age classes as a factor causing population oscillations in an obligate planktivorous fish species. Oikos 47, 223232.CrossRefGoogle Scholar
Harrod, C. and Griffiths, D. ( 2005). Parasitism, space constraints and gonad asymmetry in the pollan (Coregonus autumnalis). Canadian Journal of fisheries and Aquatic Sciences (in the Press).CrossRefGoogle Scholar
Harrod, C., Griffiths, D., Rosell, R. and McCarthy, T. K. ( 2002). Current status of the pollan (Coregonus autumnalis Pallas 1776) in Ireland. Archiv für Hydrobiologie. Special Issues Advances in Limnology 57, 627638.Google Scholar
Holmes, J. C. and Bethel, W. M. ( 1972). Modification of intermediate host behaviour by parasites. Zoological Journal of the Linnean Society 51 (Suppl. 1), 123149.Google Scholar
Hudson, P. J., Rizzoli, A., Grenfell, B. T., Heesterbeek, H. and Dobson, A. P. ( 2002). The Ecology of Wildlife Diseases. Oxford University Press, Oxford.
Johnson, K. A. ( 1971). The migration of Cotylurus erraticus cercariae (Trematoda: Strigeidae) in rainbow trout (Salmo gairdneri) and their effects on the host. Journal of Parasitology 57, 244251.CrossRefGoogle Scholar
Karvonen, A. and Valtonen, E. T. ( 2004). Helminth assemblages of whitefish (Coregonus lavaretus) in interconnected lakes: similarity as a function of species specific parasites and geographical separation. Journal of Parasitology 90, 471476.CrossRefGoogle Scholar
Kirkwood, R. C. ( 1996). Interactions between fish, Mysis, and zooplankton in Lough Neagh. Unpublished D.Phil. thesis, University of Ulster.
Lafferty, K. D. ( 1999). The evolution of trophic transmission. Parasitology Today 15, 111115.CrossRefGoogle Scholar
Loot, G., Brosse, S., Lek, S. and Guégan, J.-F. ( 2001). Behaviour of roach (Rutilus rutilus L.) altered by Ligula intestinalis (Cestoda: Pseudophyllidea): a field demonstration. Freshwater Biology 46, 12191227.Google Scholar
Niewiadomska, K. and Kozika, J. ( 1970). Remarks on the occurrence and biology of Cotylurus erraticus (Rudolphi, 1809) (Strigeidae) from the Mazurian lakes. Acta Parasitologica Polonica 18, 487496.Google Scholar
Olson, R. E. ( 1970). The life cycle of Cotylurus erraticus (Rudolphi, 1809) Szidat, 1928 (Trematoda: Strigeidae). Journal of Parasitology 56, 5563.CrossRefGoogle Scholar
Orecka-Grabda, T. ( 1991). Hemato- and histopathological changes in the whitefish (Coregonus albula (L.) invaded by metacercariae of Cotylurus erraticus (Syn. Ichthyocotylurus) (Rudolphi 1809). Acta Ichthyologica et Piscatoria 21, 319.Google Scholar
Petrushevski, G. K. and Shulman, S. S. ( 1961). The parasitic diseases of fishes in the natural waters of the USSR. In Parasitology of Fishes ( ed. Dogiel, V. A., Petrushevski, G. K. and Polyanski, Y. I), pp. 299319. Oliver and Boyd, Edinburgh.
Poulin, R. ( 2000). Manipulation of host behaviour by parasites: a weakening paradigm? Proceedings of the Royal Society of London, B 267, 787792.Google Scholar
Pulkkinen, K. and Valtonen, E. T. ( 1999). Accumulation of plerocercoids of Triaenophorus crassus in the second intermediate host Coregonus lavaretus and their effect on growth of the host. Journal of Fish Biology 55, 115126.CrossRefGoogle Scholar
Ricker, W. E. ( 1975) Computation and interpretation of biological statistics of fish populations. Bulletin of the Fisheries Research Board of Canada 191, 1382.Google Scholar
Shaw, D. J. and Dobson, A. P. ( 1995). Patterns of macroparasite abundance and aggregation in wildlife populations: a quantitative review. Parasitology 111 (Suppl.), S111S133.CrossRefGoogle Scholar
Swennen, C., Heessen, H. J. L. and Höcker, A. W. M. ( 1979). Occurrence and biology of the trematodes Cotylurus (Ichthyocotylurus) erraticus, C. (I.) variegatus and C. (I.) platycephalus (Digenea: Strigeidae) in the Netherlands. Netherlands Journal of Sea Research 13, 161191.Google Scholar
Tort, L., Watson, J. J. and Priede, I. G. ( 1987). Changes in in vitro heart performance in rainbow trout, Salmo gairdneri Richardson, infected with Apatemon gracilis (Digenea). Journal of Fish Biology 30, 341347.CrossRefGoogle Scholar
Vickers, K. U. ( 1951). Some trematodes from freshwater fish in north-east Ireland. Irish Naturalists' Journal 10, 189190.Google Scholar
Watson, J. J., Pike, A. W. and Priede, I. G. ( 1992). Cardiac pathology associated with the infection of Oncorhynchus mykiss Walbaum with Apatemon gracilis Rud. 1819. Journal of Fish Biology 41, 163167.Google Scholar
Wood, R. B. and Smith, R. V. ( 1993). Lough Neagh: the Ecology of a Multipurpose Water Resource. Kluwer Academic Publishers, Dordrecht, The Netherlands.CrossRef
Wootten, R. ( 1973). Occurrence of the metacercariae of Cotylurus erraticus (Rudolphi, 1809) Szidat, 1928 (Digenea: Strigeidae) in brown trout Salmo trutta L., and rainbow trout S. gairdneri Richardson, 1836, from Hanningfield Reservoir, Essex. Journal of Helminthology 47, 389398.Google Scholar