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Investigation of broad scale implementation of integrated multitrophic aquaculture using a 3D model of an estuary
journal contribution
posted on 2023-05-24, 04:08 authored by Scott HadleyScott Hadley, Wild-Allen, K, Craig JohnsonCraig Johnson, Catriona MacLeodCatriona MacLeodA 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 10–15% 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.
History
Publication title
Marine Pollution BulletinVolume
133Pagination
448-459ISSN
0025-326XDepartment/School
Institute for Marine and Antarctic StudiesPublisher
Pergamon-Elsevier Science LtdPlace of publication
The Boulevard, Langford Lane, Kidlington, Oxford, England, Ox5 1GbRights statement
Crown Copyright © 2018 Published by Elsevier Ltd. All rights reserved.Repository Status
- Restricted