121. The stocking density must allow fish to show most normal behaviour with minimal pain, stress and fear. Pending scientific research on the welfare of salmon in sea cages, 15 kg/m³ should be considered as an acceptable stocking rate. Higher densities may also be acceptable for short periods prior to slaughter and during treatment for disease and parasites.
122. Research should be undertaken urgently to determine acceptable maximum stocking densities taking account of factors referred to in paragraph 120 and including objective measures of the welfare of the fish. These results should be available within five years, at which point we expect to recommend the introduction of legislation to limit stocking densities.
123. Efforts should be made to reduce mortality between the parr stage and slaughter by improving existing management systems and developing systems which are better for fish welfare.