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Involvement of the barnacle settlement-inducing protein complex (SIPC) in species recognition at settlement

Lookup NU author(s): Dr Catherine Dreanno, Professor Tony Clare


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A cuticular glycoprotein known as the settlement-inducing protein complex (SIPC) induces gregarious settlement in the barnacle, Balanus amphitrite. Here the ability of B. amphitrite cyprids to discriminate among the SIPCs of three related Balanidae, B. improvisus, Megabalantis rosa and Elminitis modestus is examined. Using a laboratory settlement assay, the effective surface-adsorbed concentration of B. amphitrite SIPC that achieved 50% settlement of B. ainphitrite cypris larvae (EC50) was similar to 100 ng 0.8 cm(-2). When the B. antphitrite cyprids were exposed to conspecific and allospecific SIPC extracts at their EC50, they settled preferentially (P<0.05) on the conspecific extracts (24.3 +/- 1.8%) rather than on the SIPCs of B. improvisus (9.2 +/- 1.6%), M. rosa (9.7 +/- 2.9%) and E. modestus (3.1 +/- 2.1%). Moreover, the cyprids did not discriminate significantly (P>0.05) between the SIPCs of B. improvisus and M rosa. These results are consistent with the phylogenetic relationships of the species and suggest that variation in the SIPCs may play an important role in species recognition and barnacle evolution. (C) 2007 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Dreanno C, Kirby RR, Clare AS

Publication type: Article

Publication status: Published

Journal: Journal of Experimental Marine Biology and Ecology

Year: 2007

Volume: 351

Issue: 1-2

Pages: 276-282

ISSN (print): 0022-0981

ISSN (electronic):

Publisher: Elsevier BV


DOI: 10.1016/j.jembe.2007.07.003


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