Changes in salmon smolt ages in the Welsh River Dee over a 66 year period

• Published in: Journal of Fish Biology
• Main Authors: Cragg‐Hine, D., Bradley, D. C., Hendry, K.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2006
• Subjects: Dee; Atlantic salmon; Salmo salar
• Online Access: http://dx.doi.org/10.1111/j.0022-1112.2006.01062.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.0022-1112.2006.01062.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.0022-1112.2006.01062.x

Analysis of Atlantic salmon Salmo salar scales from the River Dee in Wales between 1937 and 2002 revealed a marked increase in the proportion of 1 + year smolts from c . 5% in the period to 1949, to almost 40% in the decade to 2002. Due to regulation flows post‐1964 over the period of change the Dee became colder during the period April to October, indicating that factors other than climate change are likely to be involved.