Chile salmon mortality falls to 9.7% in 2025, Sernapesca report shows.
Chile’s total salmonid mortality rate fell to 9.7% in 2025, down 1.5 percentage points from the previous year, according to the annual health report from Servicio Nacional de Pesca y Acuicultura (Sernapesca).
Total dead biomass reached 60,273 tonnes, a decline of around 2% compared with 2024.
Regional data showed average monthly mortality of 0.9% in Los Lagos, 0.8% in Aysén and 0.4% in Magallanes. Los Lagos and Magallanes both improved year-on-year, while Aysén recorded a marginal increase of 0.01%.
By species, coho salmon recorded the highest monthly average mortality at 1.0%, followed by rainbow trout at 0.8% and Atlantic salmon at 0.7%.
Despite the overall improvement, Tenacibaculosis increased across all three species. For Atlantic salmon, infectious causes accounted for 25.7% of total mortality. Within this category, Piscirickettsiosis (SRS) represented 52.8% and Tenacibaculosis 31.5%, up 9.6% and 2.1% respectively compared with 2024.
In rainbow trout, infectious mortality fell 1.6% overall, although Tenacibaculosis rose 6.8%. Coho salmon recorded a 7.4% decline in infectious mortality, but Tenacibaculosis still increased by 4%.
Chile reached a peak of 386 active salmon farming sites in August 2025. Atlantic salmon accounted for 66% of operating centres, followed by coho salmon at 28% and rainbow trout at 6%. Coho sites expanded 16.4% year-on-year, the largest increase among the three species.
