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dc.contributor.authorHaupt, T.M.
dc.contributor.authorGriffiths, C.L.
dc.contributor.authorRobinson, T.B.
dc.date.accessioned2013-02-19T08:25:23Z
dc.date.available2013-02-19T08:25:23Z
dc.date.issued2012
dc.identifier.citationHaupt, T.M., Griffiths, C.L. & Robinson, T.B. 2012 - Intra-regional translocations of epi- and infaunal species associated with cultured Pacific oysters, Crassostrea gigas. African Journal of Marine Science 34: 187-194.en
dc.identifier.issn1814-232X
dc.identifier.urihttp://hdl.handle.net/123456789/1202
dc.description.abstractFarmed oysters host a diverse community of epifaunal and infaunal fouling taxa, including alien species, and these are easily translocated in the course of commercial oyster trade. We document the diversity and densities of fouling taxa associated with farmed oysters Crassostrea gigas in South Africa, how effectively these are removed by conventional cleansing techniques, and whether those that remain after cleansing survive intra-regional translocation. Over 40 invertebrate species belonging to 11 major taxa were found living on farmed oysters. Both mean abundance (A) and biomass (B) of invertebrate taxa associated with uncleansed oysters (A: 79.48, SD 233.10; B: 0.034 g, SD 0.314) were greatly reduced following cleansing (A: 2.30, SD 7.65; B: 0.0003 g, SD 0.002), but mall numbers survived even after translocation (A: 1.87, SD 7.43; B: 0.006 g, SD 0.020). We examined the effectiveness of exposing oysters to either fresh water or heated seawater as a more thorough cleansing regimen to prevent the translocation of such taxa. Oysters survived soaking in fresh water (0% mortality after 18 h) better than immersion in heated seawater (26.7% mortality after 40 s), but associated organisms were more effectively eliminated by the latter treatment. However, as some taxa survived both types of treatment, translocation of oysters would still pose some bio-security risks, even following such treatments.en
dc.description.sponsorshipCentre of Invasion Biology — a joint venture between the National Research Foundation and Department of Science and Technologyen
dc.format.extent255695 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherNISCen
dc.relation.ispartofseriesAfrican Journal of Marine Scienceen
dc.subjectalien speciesen
dc.subjectbiosecurityen
dc.subjectcleansing proceduresen
dc.subjectepifaunaen
dc.subjectinfaunaen
dc.subjectSouth Africaen
dc.subjectoysteren
dc.titleIntra-regional translocations of epifaunal and infaunal species associated with cultured Pacific oysters, Crassostrea gigasen
dc.typeArticleen


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