Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-06T06:45:12.408Z Has data issue: false hasContentIssue false
  • English
  • Français

A comparison between the helminth burdens of male and female brown trout, Salmo trutta L., from a natural population in the River Teify, West Wales

Published online by Cambridge University Press:  06 April 2009

J. D. Thomas
J. D. Thomas
Affiliation:
University of Ghana, Legon, Accra, Ghana
Get access Rights & Permissions [Opens in a new window]

Extract

Nine hundred and five brown trout were collected from the River Teify, West Wales, over a period of 12 months and their helminth infestations are considered in relation to the age and sex of the host and season.

Only one statistically significant difference could be detected between levels of infestation in male and female trout of 1 and 2 years of age.

When trout of 3 years of age and over were spawning or recovering from the effects of spawning there is a tendency for sexually mature females to be more heavily infested with some parasites than the males. During the season of growth and maturation of the gonads this trend was reversed or became less marked. In the case of fish that were not spent or spawning the statistically significant differences showed the males to be more heavily infested than the females.

The possible reasons for these variations are discussed with particular reference to the roles of ‘physiological’ and ‘behavioural’ or ecological resistance'.

Type
Research Article
Information
Parasitology , Volume 54 , Issue 2 , May 1964 , pp. 263 - 272
Copyright
Copyright © Cambridge University Press 1964

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

Ashcroft, M. T. (1959). The sex ratio of infected flies found in transmission experiments with Glossina morsitans and Trypanosoma rhodesiense and T. brucei. Trans. R. Soc. trop. Med. Hyg. 53, 394–9.CrossRefGoogle ScholarPubMed
Berry, A. J. (1962). The occurrence of a trematode larva in a population of Littorina saxatilis (Olivi). Parasitology, 52, 237–40.CrossRefGoogle Scholar
Bishop, Y. M. & Margolis, L. (1955). A statistical examination of Anisakis larvae (Nematoda) in herring (Clupea pallasi) of the British Columbia Coast. J. Fish Res. Bd. Can. 12, 571–92.CrossRefGoogle Scholar
Brand, T. von (1952). Chemical Physiology of Endoparasitic Animals. New York: Academic Press, Inc.Google Scholar
Bull, P. C. (1959). A seasonal sex difference in the infestation of rabbits with the nematode Trichostrongylus retortaeformis (Zeder, 1800). Nature, Lond., 184, 281–2.CrossRefGoogle Scholar
Burtt, E. (1946). The sex-ratio of infected flies found in transmission experiments with Glossina morsitans and Trypanosoma rhodesiense. Ann. trop. Med. Parasit. 40, 74–9.CrossRefGoogle ScholarPubMed
Dobson, C. (1961 a). 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
Dobson, C. (1961 b). Certain aspects of the host-parasite relationship of Nematospiroides dubius (Baylis). II. The effects of sex on experimental infections in the rat (an abnormal host). Parasitology, 51, 499–510.CrossRefGoogle ScholarPubMed
Dobson, C. (1962). Certain aspects of the host parasite relationship of Nematospiroides dubius (Baylis). V. Host specificity. Parasitology, 52, 41–8.CrossRefGoogle Scholar
Dudzinski, M. L. & Mykytowycz, R. (1963). Relationship between sex and age of rabbits, Oryctolagus cuniculus (L.) and infection with Nematodes Trichostrongylus retortaeformis and Graphidium strigosum. J. Parasit. 49, 55–9.CrossRefGoogle Scholar
Duke, H. L. (1933). Relative susceptibility of the sexes of Glossina to infection with Trypanosomes. Ann. trop. Med. Parasit. 27, 355–6.CrossRefGoogle Scholar
Haley, A. J. (1958). Sex difference in the resistance of hamsters to infection with the rat nematode, Nippostrongylus muris. Exp. Parasit. 7, 338–48.CrossRefGoogle ScholarPubMed
Hickman, J. L. (1960). Cestodes of some Tasmanian Anura. Ann. Mag. nat. Hist. 3, 1–23.CrossRefGoogle Scholar
Hoar, W. S. (1957). Endocrine organs. In Brown, M.E. (ed.): The Physiology of Fishes, vol. 1, pp. 245–85. New York: Academic Press, Inc.CrossRefGoogle Scholar
Lees, E. (1962). The incidence of helminth parasites in a particular frog population. Parasitology, 52, 95–102.CrossRefGoogle Scholar
Lees, E. & Bass, L. (1960). Sex hormones as a possible factor influencing the level of parasitization in frogs. Nature, Lond., 188, 1207–8. Correspondence.CrossRefGoogle ScholarPubMed
Leigh, W. H. (1960). The Florida Spotted Gar, as the intermediate host for Odhneriotrema incommodum (Leidy, 1856) from Alligator mississippiensis, Abstract, J. Parasit. 46, (5, Sect. 2), 16.Google Scholar
Neafie, R. C. & Haley, A. J. (1962). Sex difference in resistance of the mouse Mus musculus to infection with the rat nematode, Nippostrongylus brasiliensis (Travassos, 1914). J. Parasit. 48, 151.CrossRefGoogle ScholarPubMed
Nelson, G. S., Heisch, R. B. & Furlong, M. (1962). Studies on filariasis in East Africa. II. Filarial infections in man, animals and mosquitoes on the Kenya coast. Trans. R. Soc. trop. Med. Hyg. 56, 202–17.CrossRefGoogle ScholarPubMed
Prosser, C. L. & Brown, F. A. (1961). Comparative Animal Physiology: Philadelphia: Saunders.Google Scholar
Read, C. P. (1958). Status of behavioural and physiological resistance. Rice Inst. Pamphl. 45, 36–54.Google Scholar
Schad, G. A. (1962). Helminth parasitism in a flock of domestic geese introduced to arctic summer conditions in Canada. Canad. J. Zool. 40, 1–4.CrossRefGoogle Scholar
Smyth, J. D. (1962). Introduction to Animal Parasitology. London: The English Universities Press.Google Scholar
Thomas, J. D. (1958 a). Studies on the structure, life history and ecology of the trematode Phyllodistomum simile Nybelin 1926 (Gorgoderidae: Gorgoderinae) from the urinary bladder of brown trout Salmo trutta L. Proc. zool. Soc. Lond. 130, 397–435.CrossRefGoogle Scholar
Thomas, J. D. (1958 b). Studies on Crepidostomum metoecus (Braun) and C. farionis (Müller), parasitic in Salmo trutta L. and S. salar L. in Britain. Parasitology, 48, 336–52.CrossRefGoogle Scholar
Thomas, J. D. (1962). The food and growth of brown trout (Salmo trutta L.) and its feeding relationships with the salmon parr (Salmo salar L.) and the eel (Anguilla anguilla (L.)) in the River Teify, West Wales. J. Anim. Ecol. 31, 175–205.CrossRefGoogle Scholar
Thomas, J. D. (1964). Studies on the growth of brown trout (Salmo trutta L.) from four contrasting habitats. Proc. zool. Soc. Lond. 142, 1–51.Google Scholar
Yamaguti, S. (1961). Systema Helminthum, Vol. 3. Nematodes. Parts 1 and 2. London: Interscience Publishers, Ltd.Google Scholar