Centuries-long collapse of Baltic herring trade linked to combined pressures
A study led by Kiel University and iDiv examined why the Skanör-Falsterbo herring fishery in the Baltic Sound collapsed around 1570 after centuries of stability. Researchers found that the stock decline alone was insufficient; environmental shifts, heavy fishing, and socioeconomic changes combined to end the trade. Catches did not recover to similar levels until the 1950s, nearly four centuries later.
Researchers from Kiel University and iDiv led an international group of historians, ecologists and fisheries economists. Their work centered on the Skanör-Falsterbo herring trade in the Baltic Sound, which had remained stable for centuries before a sharp decline near 1570. The team built a 450-year catch record for 1200–1650 from customs documents, royal preemption records and other archives, filling gaps with salt availability and climate reconstructions.
Using a bioeconomic stock assessment method and loop analysis, they modeled links among fish populations, prices, ecology and society. The findings, published in Nature Sustainability, indicate that shrinking herring numbers alone did not end the fishery; environmental, fishing and social pressures interacted. Catches only returned to similar levels in the 1950s.
This research may influence how fisheries managers and historians think about collapse, suggesting single-cause explanations can miss interacting pressures. Coastal communities, policymakers, and industry groups could use such long-term perspectives when assessing current stock risks, though historical parallels require caution. It may also encourage broader collaboration among economists, ecologists, and historians.