Factors affecting the recovery of soft-sediment mussel reefs in the Firth of Thames, New Zealand

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dc.contributor.author McLeod, IM en
dc.contributor.author Parsons, Darren en
dc.contributor.author Morrison, M en
dc.contributor.author Le Port, Agnes en
dc.contributor.author Taylor, Richard en
dc.date.accessioned 2011-11-29T19:01:09Z en
dc.date.issued 2011 en
dc.identifier.citation Marine and Freshwater Research 2011 en
dc.identifier.issn 1323-1650 en
dc.identifier.uri http://hdl.handle.net/2292/9605 en
dc.description.abstract Bivalve reefs are vital ecosystem engineers, but have declined or disappeared in many regions. In the Firth of Thames (FOT), northeast New Zealand, overfishing and/or sedimentation led to the commercial extinction of extensive reefs of green-lipped mussels (Perna canaliculus). The mussel reefs have not recovered since commercial fishing ceased in 1968, possibly because the muddy sediments that replaced the reefs are an unsuitable habitat for adult mussels. To test this hypothesis, we transplanted mussels into cages on the seafloor at three sites along a turbidity gradient (average visibility 0.8 - 4.7 m) within the mussel reefs former range for 500 days. Sixty eight percent of individuals survived the duration of the experiment, and they grew an average of 19 mm in length. Survivorship and growth did not differ between sites. However, at the completion of the experiment mussels from the least turbid site were in better condition (Condition Index = 15) than those from the most turbid site (Condition Index = 10). Our results suggest that the current lack of recovery of mussel reefs in the FOT is attributable to low recruitment and/or survivorship of juvenile mussels. Restoration of mussel reefs and the ecosystem services they provide may therefore be possible. en
dc.publisher CSIRO en
dc.relation.ispartofseries Marine and Freshwater Research en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/1323-1650/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Factors affecting the recovery of soft-sediment mussel reefs in the Firth of Thames, New Zealand en
dc.type Journal Article en
dc.identifier.doi 10.1071/MF11083 en
pubs.issue 1 en
pubs.begin-page 78 en
pubs.volume 63 en
dc.rights.holder Copyright: CSIRO en
pubs.end-page 83 en
pubs.publication-status Accepted en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 232970 en
pubs.org-id Science en
pubs.org-id Marine Science en
pubs.record-created-at-source-date 2011-10-17 en

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