Following the statutory consultation period, the final classifications for Scotland's rivers in 2017 have been announced, in line with salmon conservation regulations.
Data used has shown Category 1 rivers to have a conservation status which does not require mandatory catch and release.
Category 2 rivers do not require mandatory catch and release but are under regular review.
Category 3 rivers show populations which are not sustainable and catch and release is in place in order to conserve stocks.
Of 168 assessed rivers, there are 47 Grade one and 48 grade two. Seventy three are classed as grade 3.