Atlantic salmon smolt migration timing for 9 rivers across UK, Ireland and France.

This data package consists of time series of migration timing information for Atlantic salmon smolts leaving their home rivers. The 9 rivers included are: Dee (Wales) 1997 - 2019,Frome (England) 2006 - 2020,Tamar (England) 2005 - 2019,Bresle (France) 1996 - 2021,Oir (France) 1986 - 2021,Scorff (France) 1997 - 2021,Bush (Northern Ireland) 1997 - 2020,Burrishoole (Ireland) 1970 - 2019,North Esk (Scotland) 1975 - 2013. Some data is still being added to annually. Most have been derived from daily counts but some are based on weekly.