Zeitschrift für Parasitenkunde

, Volume 56, Issue 1, pp 1–11 | Cite as

The occurrence ofCercaria cerastodermae I Sannia, James, and Bowers, 1978 (Digenea: Monorchiidae) in populations ofCerastoderma edule (L.) from the commercial beds of the Lower Thames Estuary

  • A. Sannia
  • B. L. James


A total of 10,406 cockles (Cerastoderma edule) were taken at monthly intervals between May 1975 and November 1976 from the Thames estuary, in order to demonstrate variations in percentage infection byCercaria cerastodermae I (Monorchiidae) with season, size, age, distribution and species of host. Cockles of different ages and sizes are equally susceptible to infection but season and perhaps species of host are important in determining the percentage infection.

The maturity of the infection and the mean number of metacercariae per daughter sporocyst from the same host are also largely determined by season. The peak of both is reached in early spring.

Parasitism decreases the host's shell growth rate and may increase the susceptibility to other digenean species.


Growth Rate Early Spring Monthly Interval Shell Growth Percentage Infection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • A. Sannia
    • 1
  • B. L. James
    • 1
  1. 1.Zoology DepartmentUniversity CollegeSwanseaUK

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