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How a 'traffic lights' system is keeping salmon alive in this Perthshire river

The two-year scheme used 15 years of flow data and has prevented smolt mortality at Victorian weirs during two unusually dry springs, the trust said.

An innovative Perthshire conservation project which uses ‘traffic lights’ to protect juvenile salmon is celebrating its second year without fish mortality.

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The Herald Scotland broke the news in Glasgow, United Kingdom on Thursday, November 5, 2026.
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