The report on the Spey hatchery genetic study has been finalised. It can be downloaded here .
During the course of this study the male and female salmon broodstock used in the Spey hatcheries between 2004 to 2012 were genetically sampled. In subsequent years DNA samples were collected from rod caught fish from fishing beats throughout the river. The DNA profile of the rod caught fish between 2008 – 2012 were screened and compared to the broodstock DNA database. From this is was concluded that between 0% and 1.8% of all rod caught fish could be traced back to the hatchery.
Year to year the results were reasonably consistent with a low contribution of hatchery origin fish to the Spey rod fishery.
Another aspect of the study involved sampling adult fish returning to Spey Dam. The area above Spey Dam was targeted heavily for stocking due to the low juvenile stock present above the dam. Out of a total of 33 adults sampled in 2010 none were found to be of hatchery origin.