The population of wild Atlantic salmon in Ireland has plummeted by an estimated 80% since the 1970s, according to a major environmental assessment detailing the severe ecological pressures facing the species.

The dramatic decline highlights a growing conservation crisis for the native fish, which relies on healthy river systems and marine environments to complete its complex life cycle. Environmental experts and conservation bodies have raised concerns over the findings, pointing to a combination of habitat degradation, water quality issues, and climate-related shifts in marine survival rates as key drivers of the population collapse.

Historically, Irish rivers hosted abundant runs of Atlantic salmon, supporting local ecosystems as well as recreational angling and commercial fisheries. However, the new data indicates that the species is now under unprecedented stress, with far fewer adult salmon returning from the sea to spawn in their native freshwater rivers.

Conservationists warn that without urgent intervention to improve water quality, restore river habitats, and address the wider impacts of climate change on marine ecosystems, the future of the wild Atlantic salmon in Ireland remains highly precarious.