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dc.contributor.authorMabin, C.A.
dc.contributor.authorWilson, J.R.U.
dc.contributor.authorLe Roux, J.J.
dc.contributor.authorRobinson, T.B.
dc.date.accessioned2017-12-21T12:28:36Z
dc.date.available2017-12-21T12:28:36Z
dc.date.issued2017
dc.identifier.citationMabin, C.A.; Wilson, J.R.U.; Le Roux, J.J.; Robinson, T.B. (2017) Reassessing the invasion of South African waters by the European shore-crab Carcinus maenas. African Journal of Marine Science, 39(3): 259-267en
dc.identifier.issn1814-232Xen
dc.identifier.urihttp://hdl.handle.net/123456789/2376
dc.description.abstractThe European shore-crab Carcinus maenas has been present in South Africa since 1983. Despite this species’ international reputation as a biological invader, its distribution in this region has only been considered by three outdated ‘snapshot surveys.’ The present study is the most comprehensive to date, providing an update on the species’ range and the first temporal assessment of its abundance and demographics. Along South Africa’s Cape Peninsula and surrounding areas, C. maenas was absent from 12 intertidal sites surveyed, except for Sea Point, and no crabs were found during subtidal surveys along the open coastline. Subtidal harbour populations were recorded in the Cape Town harbours of Table Bay and Hout Bay (previously estimated as comprising approximately 164 200 and 6 500 individuals, respectively). Table Bay was surveyed monthly for one year, using baited traps, crab condos and postlarvae settlement collectors, to assess size distributions and reproductive seasonality of the crab. Reproductive females were recorded throughout most of the year. These results suggest that the harbour populations could be targeted by control programmes, but provide no strong evidence to support the initiation of management action during a particular season. The lack of detection of postlarval settlement, even among well-established populations, suggests this will not be a useful monitoring tool for detecting incursions.en
dc.format.extent651574 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherNISC (Pty) Ltden
dc.subjectharbour populationsen
dc.subjectintertidal surveyen
dc.subjectinvasive speciesen
dc.subjectMarine invasionsen
dc.subjectpopulation statusen
dc.subjectpostlarval settlementen
dc.subjectreproductive seasonalityen
dc.subjectsutidal surveyen
dc.titleReassessing the invasion of South African waters by the European shore-crab Carcinus maenasen
dc.typeJournalArticlesen
dc.cibjournalAfrican Journal of Marine Scienceen
dc.cibprojectNAen


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