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Laksvel

— A standardised, operational welfare monitoring protocol for Atlantic salmon held in sea cages

Author(s): Jonatan Nilsson (HI), Kristine Gismervik, Kristoffer Vale Nielsen (Veterinærinstituttet), Martin Haugsmo Iversen (Nord universitet), Chris Noble, Jelena Kolarevic (Nofima), Hilde Frotjold, Kathrine Nilsen (STIM), Eirik Wilkinson (Labora), Barbo Klakegg, Hege Sørvåg Hauge, Per Anton Sæther (Åkerblå) and Tore Kristiansen og Lars Helge Stien (HI)

Report series: Rapport fra havforskningen 2025-40 ISSN: 1893-4536 Published: 20.06.2025 Project No.: 15542 On request by: Fishery and Aquaculture Industry Research Funding (FHF) Reference: 901554
Research group(s): Dyrevelferd Subject: Fiskevelferd Program: Fremtidens havbruk
Research group leader(s): Lars Helge Stien (Dyrevelferd)
Approved by: Research Director(s): Geir Lasse Taranger Program leader(s): Robin Ørnsrud External: English version edited by Angelico Madaro (HI)

Norsk sammendrag

Summary

To measure and record fish welfare in a consistent manner, a detailed protocol is necessary for how measurements and scores should be conducted. This report describes three environmental based (oxygen, temperature, and salinity), three group based (behavior, appetite, and mortality), and fourteen individual based operational welfare indicators for use in salmon grow-out facilities. All indicators are divided into four levels that indicate increasing welfare burden at each level. The protocol includes instructions on how the indicators should be measured or scored, and for the individual-based welfare indicators, there is a guide with a description of each indicator and three example images for each of the three levels indicating deviations (scoring levels 1-3).

The welfare monitoring described in this protocol is intended as a basic level for detecting potential welfare issues and does not necessarily provide detailed information about the cause of observed deviations. Therefore, additional more in-depth investigations may be necessary.

Link to the report in norwegian: Laksvel | Havforskningsinstituttet