Modelling the cultivation and bioremediation potential of the kelp Saccharina latissima in close proximity to an exposed salmon farm in Norway

A 3-dimensional hydrodynamic-ecological model system (SINMOD) was used to estimate the full-scale cultivation potential of the brown alga Saccharina latissima in integrated multi-trophic aquaculture (IMTA) with Atlantic salmon Salmo salar. A previously developed model for the frond size and composit...

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Bibliographic Details
Published in:Aquaculture Environment Interactions
Main Authors: OJ Broch, IH Ellingsen, S Forbord, X Wang, Z Volent, MO Alver, A Handå, K Andresen, D Slagstad, KI Reitan, Y Olsen, J Skjermo
Format: Article in Journal/Newspaper
Language:English
Published: Inter-Research 2013
Subjects:
Aquaculture. Fisheries. Angling
SH1-691
Ecology
QH540-549.5
Norway
Imta
Atlantic salmon
Salmo salar
Online Access:https://doi.org/10.3354/aei00080
https://doaj.org/article/56d9477467a04662b97e12b9e8b03ca6
Description
Summary:A 3-dimensional hydrodynamic-ecological model system (SINMOD) was used to estimate the full-scale cultivation potential of the brown alga Saccharina latissima in integrated multi-trophic aquaculture (IMTA) with Atlantic salmon Salmo salar. A previously developed model for the frond size and composition (carbon and nitrogen content) of S. latissima sporophytes was adjusted to data from an outdoor mesocosm growth experiment and then coupled and run online with the 3-dimensional model system. Results from simulations were compared with data from an IMTA field experiment, providing partial validation of the hydrodynamic–ecological–kelp model system. The model system was applied to study the large-scale cultivation potential of S. latissima in IMTA with salmon and to quantify its seasonal bioremediation potential. The results suggest a possible yield of 75 t fresh weight S. latissima ha-1 in 4 mo (February to June) and about 170 t fresh weight ha-1 in 10 mo (August to June). The results further suggest that the net nitrogen consumption of a 1 ha S. latissima installation in the vicinity of a fish farm producing approximately 5000 t salmon in a production cycle is about 0.36 (0.15) t NH4+-N, or a removal of 0.34% (0.41%) of the dissolved inorganic nitrogen effluent with a cultivation period from August (February) to June. Due to the differing seasonal growth patterns of fish and kelp, there was a mismatch between the maximum effluent of NH4+-N from the fish farm and the maximum uptake rates in S. latissima.

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