# Commission Implementing Regulation (EU) 2020/464 of 26 March 2020 laying down certain rules for the application of Regulation (EU) 2018/848 of the European Parliament and of the Council as regards the documents needed for the retroactive recognition of periods for the purpose of conversion, the production of organic products and information to be provided by Member States (Text with EEA relevance), Part I: Salmonids in fresh water

Extent: E+W+S+N.I.

Brown trout (Salmo trutta) – Rainbow trout (Oncorhynchus mykiss) – American brook trout (Salvelinus fontinalis) – Salmon (Salmo salar) – Arctic charr (Salvelinus alpinus) – Grayling (Thymallus thymallus) – American lake trout (or grey trout) (Salvelinus namaycush) – Huchen (Hucho hucho)
Production systems
Ongrowing farm systems must be fed from open systems. The flow rate must ensure a minimum of 60 % oxygen saturation for stock and must ensure their comfort and the elimination of farming effluent.
Maximum stocking density
Salmonid species not listed below 15 kg/m3
Salmon 20 kg/m3
Brown trout and Rainbow trout 25 kg/m3
Arctic charr 25 kg/m3

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Source: https://www.legislation.gov.uk/eur/2020/464/annex/II/part/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2020-464/annex-II/part-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.