The Impact of Escaped Farmed Atlantic Salmon (Salmo salar L.) on Catch Statistics in Scotland

摘要: In Scotland and elsewhere, there are concerns that escaped farmed Atlantic salmon (Salmo salar L.) may impact on wild stocks. Potential detrimental effects could arise through disease spread, competition, or inter-breeding. We investigated whether is evidence of a direct effect recorded escape events stocks in using anglers' counts caught (classified as farmed) sea trout trutta L.). This tests specifically documented can be associated with reduced elevated escapes detected the catch over five-year time window, after accounting for overall variation between areas years. Alternate model frameworks were somewhat inconsistent, however no robust association was found higher proportion farm-origin catch, nor size. A weak positive correlation local subsequent catch. opposite direction to what would expected if negatively affected fish numbers. Our approach events, contrasting earlier studies examining potentially wider farming more conservative, but alleviates some potential sources confounding, which always concern observational studies. Successful analysis reports requires high data quality, particularly since relatively rare event Scottish data. Therefore, part our analysis, we reviewed sensitivity specificity determination origin. Specificity estimates generally literature, making an form have performed feasible.