Aquatic Animal Welfare

Wild Salmon Run Timing and Climate Disruption

Climate change is shifting salmon run timing in Pacific and Atlantic rivers, creating mismatches with food availability and threatening welfare and survival.

Key Facts

Pacific salmon runs are shifting earlier in many rivers due to warming temperatures
Earlier runs create mismatches with zooplankton prey availability for juveniles
Higher river temperatures cause direct thermal stress and disease in migrating adults
Altered run timing disrupts synchrony with marine food production cycles
Monitoring programmes track run timing to guide conservation interventions

Welfare Considerations

Climate-driven disruption of salmon run timing creates welfare impacts at multiple life stages. Warmer rivers cause thermal stress, disease and starvation, while adults face energetic costs of migration during suboptimal conditions. River cooling measures and flow management offer partial mitigation.

What You Can Do

Support river restoration projects that shade and cool salmon rivers
Advocate for climate policies that protect salmon-critical cold-water systems
Choose sustainably certified wild salmon products