Saimaa seal bycatch jumps, population growth falls short, Finland weighs tighter fishing curbs

• Recorded gear-related deaths rose from a low base five years ago to more than five times that level.
• Authorities and researchers say the increase cannot be explained simply by a larger seal population.
• Most deaths are linked to fishing gear, with nets and other trap risks concentrated in parts of the Saimaa lake system.
• The case has renewed pressure to examine whether existing seasonal restrictions are being enforced well enough to prevent avoidable losses.

Bycatch deaths of the Saimaa ringed seal, one of the world’s rarest seals, have increased more than fivefold in five years in eastern Finland’s Saimaa lake system. YLE reports that the rise does not match population growth alone, after years in which gear-related deaths had been moving down rather than up.

The Saimaa ringed seal is a freshwater subspecies found only in Lake Saimaa, and its recovery has long depended on a mix of fishing restrictions, nest protection and public funding. The numbers now moving in the wrong direction matter because bycatch is not a random natural loss: it is tied to specific gear, seasons and areas where people already know young seals are at risk. If deaths rise faster than the population, each additional carcass says something about compliance, supervision or the design of the restrictions themselves.

According to YLE’s reporting, the recent increase is concentrated in gear-related deaths rather than a broad change in overall mortality. The central danger remains fishing equipment that can trap seals, especially juveniles that are less experienced and more vulnerable during the open-water season. Finland has for years used seasonal bans and gear limits in parts of Saimaa, aimed above all at preventing pups and young seals from drowning in nets. Those rules reduced deaths earlier. The current figures suggest that writing restrictions into regulations and getting risky gear out of the water are two different things.

Where the deaths occur also matters. Saimaa is not a single open lake but a fragmented labyrinth of basins, straits and shorelines spread across several municipalities. That makes conservation highly local. A restriction that exists on paper across a broad area still depends on thousands of shoreline decisions by commercial fishers, cottage owners and recreational users. The state carries the administrative burden; the seal carries the direct cost when a net stays in the water.

The policy question is whether Finland is now tightening protections or mainly counting losses more carefully after they happen. If the increase comes from the same known hazard — prohibited or harmful gear in seal waters during sensitive periods — then the problem is less biological than administrative. A growing seal population was supposed to make each death less catastrophic. Instead, the latest tally has made bycatch a measure of how much protection reaches the water’s edge.

The Saimaa ringed seal population has grown over the long term, but a drowned juvenile in a fishing net does not care which ministry issued the guidance. On Saimaa, the evidence still surfaces one carcass at a time.

Källor: YLE Uutiset