Marine Biology

, Volume 110, Issue 2, pp 253–259 | Cite as

Distribution of encrusting bryozoans and other epifauna on the subtidal bivalveChlamys opercularis

  • M. A. Ward
  • J. P. Thorpe


The shells of living queen scallops,Chlamys opercularis (L.), are often completely colonised with epifauna. In this study, the distribution of the major epifaunal groups across the surfaces of left (upper) and right (lower) valves is examined using samples from two commercial queen scallop beds off the Isle of Man. The composition of the epifauna differs across and between the valves and also varies with the age of the scallop. YoungerC. opercularis are commonly encrusted by sponges, but on older shells other epifauna colonise the surfaces. The encrusting bryozoan assemblage found on livingC. opercularis is not as abundant or speciose as on some other substrata such as stones and dead shell. This may be a result of intense competition from other phyla. The distribution of different bryozoan species between the surfaces is examined. Most species are more abundant on the lower valves.


Sponge Intense Competition Bryozoan Species Lower Valve Dead Shell 
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 1991

Authors and Affiliations

  • M. A. Ward
    • 1
  • J. P. Thorpe
    • 1
  1. 1.Port Erin Marine LaboratoryUniversity of LiverpoolPort ErinIsle of Man, Great Britain

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