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The co-occurrence of three species of Diorchis Clerc, 1903 (Cestoda: Hymenolepididae) in the European coot, Fulica atra L.

Published online by Cambridge University Press:  06 April 2009

Teresa Pojmańska
Teresa Pojmańska
Affiliation:
Institute of Parasitology, Polish Academy of Sciences, Pasteura 3, s.p. 153, 00-973 Warszawa, Poland
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Summary

The relationship between intensity and site of infection of Diorchis brevis, D. inflata and D. ransomi in Fulica atra from central Poland has been analysed; of 173 adult birds 152 (87·9%) were infected with one or more of these three species. From (1) the incidence of the three species (D. brevis, 59·5%; D. inflata, 69·9%; D. ransomi, 61·3%), (2) the high total incidence and high total intensity of infection (118·2 worms/bird) in hosts harbouring the three species concurrently and (3) the frequent co-occurrence of all three species in the same site in the host gut, it is concluded that there are no antagonistic interactions among these species. There are, however, some inter-dependencies between the number of parasites and the site occupied by particular species. In heavy infections there was a tendency to specific segregation and extension of the site of each species. This suggests the existence of inter- and intra-specific competition at higher densities of infection, regulating the spatial distribution of these parasites in the host gut.

Type
Research Article
Information
Parasitology , Volume 84 , Issue 3 , June 1982 , pp. 419 - 429
Copyright
Copyright © Cambridge University Press 1982

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