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Epibiosis and hyperepibiosis on Pagurus bernhardus (Crustacea: Decapoda) from the west Coast of Scotland

Published online by Cambridge University Press:  21 November 2012

Gregorio Fernandez-Leborans*
Affiliation:
Department of Zoology, Faculty of Biology, Pnta9, Complutense University, 28040 Madrid, Spain
Patricia Dávila
Affiliation:
Department of Zoology, Faculty of Biology, Pnta9, Complutense University, 28040 Madrid, Spain
Eva Cerezo
Affiliation:
Department of Zoology, Faculty of Biology, Pnta9, Complutense University, 28040 Madrid, Spain
Cristina Contreras
Affiliation:
Department of Zoology, Faculty of Biology, Pnta9, Complutense University, 28040 Madrid, Spain
*
Correspondence should be addressed to: G. Fernandez-Leborans, Department of Zoology, Faculty of Biology, Pnta9, Complutense University, 28040 Madrid, Spain email: greg@bio.ucm.es

Abstract

The presence of a diverse range of epibionts was found on Pagurus bernhardus from the west coast of Scotland. The invertebrate species found on the shell inhabited by the crab were the hydrozoans Hydractinia echinata and Dycorine conferta, the cirripeds Balanus balanus and Balanus crenatus, the polychaetes Hydroides norvegica, Pomatoceros triqueter and Circeis armoricana, and the molluscs Hiatella arctica and Anomia ephippium. On the crab were observed the polychaete Circeis armoricana and the amphipod Podoceropsis nitida. In addition, on the gastropod shells occupied by P. bernhardus, ciliate protozoan species were found attached to the hydrozoan Dycorine conferta, this being hyperepibiosis. These ciliates were 6 suctorian (Conchacineta constricta, Corynophrya anisostyla, Actinocyathula homari, Actinocyathula crenata, Acineta sulcata and Acineta corophii), and one peritrich species (Zoothamnium sp.). This is the first time that this hyperepibiosis was observed. In contrast to the epibiont communities observed in previous surveys in the same sampling area, basibiont specimens without D. conferta did not show ciliate epibionts. The ciliate epibionts also were not present on the surface of the shell and crab in specimens with D. conferta; they only appeared in hyperepibiosis on the surface of the hydrozoan. The spatial distribution and abundance of the invertebrate epibiont species were analysed, as well as the morphology, taxonomy and distribution of the ciliate hyperepibionts.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012 

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