Utility of bivalve aquaculture of urban environments in New Zealand

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dc.contributor.advisor Dunphy, B en
dc.contributor.author Pivac, Alyx en
dc.date.accessioned 2016-12-19T20:48:42Z en
dc.date.issued 2016 en
dc.identifier.uri http://hdl.handle.net/2292/31449 en
dc.description Full text is available to authenticated members of The University of Auckland only. en
dc.description.abstract Bivalves are considered to be ecosystem engineers, and an important component in New Zealand’s marine diversity. It is well supported that through the filter feeding processes of such organisms, excess nutrients and heavy metals are removed from the surrounding marine environment, often improving water quality. A series of tests were performed to discover the utility of bivalve aquaculture in urban environments within New Zealand. Initially a field experiment was trialed, however after biological and logistical difficulties, a laboratory based approach was adopted. A comparative study between the Green Lipped Mussel (Perna canaliculus), Pacific Oyster (Crassostrea gigas) and the M. galloprovincialis (Xenostrobus neozelanicus) was performed. Inductively coupled plasma mass spectrometry (ICP-MS) techniques were used to measure levels of selected elements (Mg, Al, Cd, Zn, Pb, Cu, Ni). A focus was then taken to the utilization of New Zealand’s native aquaculture species P. canaliculus to better understand the interactions between this species and an urban setting. Laser ablation inductively coupled plasma mass spectrometry techniques were used to measure the levels of elements (Mg, Al, Cd, Zn, Pb, Cu, Ni) retained by this species after 6 months of feeding in an urban marine environment. For the purpose of the study, four mesocosms were set up at Kelly Tarlton’s Aquarium, and water samples were measured on a weekly basis. This demonstrated the clearance rate of P. canaliculus over a period of 25 weeks, which was then used to better understand growth and feeding rates of the species within such an environment. Results demonstrated some statistical significance between the means of the species heavy metal uptake, however results between analytes vary. Furthermore, there was no statistical significance to show any increase in heavy metal accumulation within an urban environment measured over 25 weeks (P. canaliculus). Clearance rate shown by P. canaliculus increased over a period of 25 weeks, typical behaviour of bivalves from winter to summer seasonal changes. Results are consistent with current scientific publications, displaying promise that bivalve aquaculture has a positive effect on water quality. en
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof Masters Thesis - University of Auckland en
dc.relation.isreferencedby UoA99264896507902091 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. en
dc.rights Restricted Item. Available to authenticated members of The University of Auckland. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/nz/ en
dc.title Utility of bivalve aquaculture of urban environments in New Zealand en
dc.type Thesis en
thesis.degree.discipline Biological Science en
thesis.degree.grantor The University of Auckland en
thesis.degree.level Masters en
dc.rights.holder Copyright: The author en
pubs.elements-id 603029 en
pubs.record-created-at-source-date 2016-12-20 en

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