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Investigation of broad scale implementation of integrated multitrophic aquaculture using a 3D model of an estuary


Hadley, S and Wild-Allen, K and Johnson, C and Macleod, C, Investigation of broad scale implementation of integrated multitrophic aquaculture using a 3D model of an estuary, Marine Pollution Bulletin, 133 pp. 448-459. ISSN 0025-326X (2018) [Refereed Article]

Copyright Statement

Crown Copyright 2018 Published by Elsevier Ltd. All rights reserved.

DOI: doi:10.1016/j.marpolbul.2018.05.045


A 3D ecosystem model was used to quantify changes in water quality brought about by salmon aquaculture in the D'Entrecasteaux Channel and Huon Estuary in southeast Tasmania. Macroalgae-based integrated multitrophic aquaculture (IMTA) was simulated and showed that IMTA is capable of reducing the increased chlorophyll concentration attributable to fish farming by up to 1015% in large areas of the region, during the season of highest production. Kelp farms (Macrocystis pyrifera) recovered between 6 and 11% of the dissolved inorganic nitrogen (DIN) input by salmon aquaculture over a nine month period, with DIN remediation increasing linearly with farm size. Under a ten-fold increase in aquaculture to very high loads, a much lower remediation effect was found for both chlorophyll and DIN. Model results indicate that IMTA could have an important impact on reducing negative effects of finfish aquaculture on water quality providing that stocking rates are not too high.

Item Details

Item Type:Refereed Article
Keywords:bioremediation, macrocystis, salmon aquaculture, biogeochemical model, giant kelp
Research Division:Mathematical Sciences
Research Group:Applied mathematics
Research Field:Biological mathematics
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Hadley, S (Mr Scott Hadley)
UTAS Author:Johnson, C (Professor Craig Johnson)
UTAS Author:Macleod, C (Associate Professor Catriona MacLeod)
ID Code:126631
Year Published:2018
Web of Science® Times Cited:5
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2018-06-20
Last Modified:2018-12-14

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