Rivers Database

The Council first established a database of salmon rivers in 1989 and over the last 26 years it has undergone several changes. A history of the Rivers Database can be found in the Report of the Working Group on Stock Classification, CNL(16)11.

In 2016, Council adopted a revised classifications system, CNL(16)11. The Stock Classifications Score (SCS) was based on:

• Conservation limits Attainment Score (CAS): based on available information concerning the extent to which the conservation limit is being attained; and
• Impacts Assessment Score (IAS): based on a range of factors including: habitat degradation e.g. deterioration in water quality or obstacles to migration; over-harvest or selective harvest; diseases and parasites, e.g. sea lice; G. salaris; impacts on genetic integrity e.g. due to aquaculture escapees; or a steadily declining stock trend where the causes are unknown.

The CAS and IAS are added together to assign a Stock Classification Score (SCS) to a river.

An amalgamated version of this classification was used in the State of North Atlantic Salmon Report.

The interactive map of the Rivers Database will be available soon.