Wildlife

Salmon River Migration Barrier Removal Welfare

Removing weirs and culverts that block migratory fish passage is a major conservation intervention with direct animal welfare benefits.

Key Facts

Over 30,000 barriers obstruct UK rivers reducing salmonid access to spawning grounds
Fish attempting to leap impassable barriers expend massive energy and risk injury
Restoration of river connectivity can increase salmon populations by 50-300%
Fish passes allow passage but are used by only a fraction of the fish that would use open rivers
Barrier removal is more cost-effective than fish pass construction in most situations

Welfare Considerations

Salmon blocked from spawning grounds experience physiological stress from prolonged migration without reproductive success. The welfare benefit of barrier removal - allowing natural migratory completion - is profound at population scale, also benefiting eels, trout, and lamprey.

What You Can Do

Support river restoration organisations removing obsolete barriers
Advocate for mandatory fish passage at all new water infrastructure
Learn about salmon migration ecology and its importance
Report suspected fish passage problems to the Environment Agency