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Aquaculture Environment Interactions

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AEI 11:331-336 (2019)  -  DOI:

Enhancing opportunistic polychaete communities under fish farms: an alternative concept for integrated aquaculture

H. M. Jansen1,2,*, P. K. Hansen1, N. Brennan3, T. G. Dahlgren4,5, J. Fang6,7, M. A. J. Nederlof8, T. Strohmeier1, H. Sveier9, Ø. Strand1

1Institute of Marine Research, Nordnesgaten 50, 5005 Bergen, Norway
2Wageningen Marine Research, Wageningen UR, Yerseke 4401 NT, The Netherlands
3Department of Biological Sciences, Bergen University, 5020 Bergen, Norway
4NORCE Norwegian Research Centre, Postboks 22 Nygårdstangen, 5838 Bergen, Norway
5Gothenburg Global Biodiversity Centre and Department of Marine Sciences, University of Gothenburg, 40530 Gothenburg, Sweden
6Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Qingdao 266071, PR China
7Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, PR China
8Department of Aquaculture & Fisheries, Wageningen University, Wageningen 6708 WD, The Netherlands
9Lerøy Seafood Group, 5020 Bergen, Norway
*Corresponding author:

ABSTRACT: This note presents the development of benthic integrated aquaculture, addressing a novel cultivation concept for open-water aquaculture. We introduce an approach that supports the colonization of indigenous polychaete communities on benthic cultivation trays deployed in the vicinity of fish-farming cages. Enhancement and subsequent harvest of polychaetes that naturally dominate the local benthic response is essentially different from the classical IMTA approach wherein juveniles and/or seedlings of the extractive species are introduced to the farm site. Results of a field trial showed quick and massive colonization of cultivation trays by polychaetes (predominantly Ophryotrocha craigsmithi) and large spatial variability within the salmon farm site. Our results suggest that enhancing indigenous opportunistic polychaetes is a promising cultivation concept making use of the deposition of organic wastes such as fish faeces and uneaten feed. The methods and results presented here contribute to solutions for technical optimization of benthic IMTA techniques. We expect that further advances in benthic IMTA production will contribute to the expansion of open-water finfish aquaculture within environmentally sustainable boundaries.

KEY WORDS: Integrated multi-trophic aquaculture · IMTA · Organic loading · Deposit feeders · Indigenous species · Ophryotrocha

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Cite this article as: Jansen HM, Hansen PK, Brennan N, Dahlgren TG and others (2019) Enhancing opportunistic polychaete communities under fish farms: an alternative concept for integrated aquaculture. Aquacult Environ Interact 11:331-336.

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