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Rare predation by the intertidal crab Pachygrapsus marmoratus on the limpet Patella depressa

Silva, A., Boaventura, D., Flores, A., Re, P. and Hawkins, S.J. (2004) Rare predation by the intertidal crab Pachygrapsus marmoratus on the limpet Patella depressa Journal of the Marine Biological Association of the United Kingdom, 84, (2), pp. 367-370. (doi:10.1017/S0025315404009294h).

Record type: Article


The predatory effects of Pachygrapsus marmoratus on populations of the intertidal limpet Patella depressa were analysed on rocky shores located on the central coast of Portugal. Nocturnal observations on crab feeding behaviour were conducted and experimental exclusion cages were set in the substratum to assess density effects on limpets. The results indicated that although crabs feed on adult limpets the predatory level was minimal. Crabs used consistent tactics to detach limpets from the substratum but the majority of the attacks were unsuccessful, possibly due to morphological and behavioural adaptations of limpets. An alternative recruitment hypothesis is advanced to explain non-significant differences between experimental treatments and a possible predatory role on shaping levels of recruitment on lower levels of the shore is considered.

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Published date: April 2004


Local EPrints ID: 56873
ISSN: 0025-3154
PURE UUID: 6860385b-7c39-4020-8740-3dd252dc9ba5

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Date deposited: 06 Aug 2008
Last modified: 17 Jul 2017 14:30

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Author: A. Silva
Author: D. Boaventura
Author: A. Flores
Author: P. Re
Author: S.J. Hawkins

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