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Expired Salmon Cans Reveal Climate Change Insights

11/1/2025

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Summary

Story summary

Researchers at the University of Washington show that expired canned salmon from the 1970s can archive marine ecosystem change.
The study analyzed 178 samples from four salmon species in the Gulf of Alaska and Bristol Bay.
Anisakid parasite levels were higher in chum and pink salmon, while coho and sockeye remained stable.
This approach enables long-term tracking of climate change effects without fresh samples, potentially informing ecosystem management.

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Story summary

Researchers at the University of Washington show that expired canned salmon from the 1970s can archive marine ecosystem change.
The study analyzed 178 samples from four salmon species in the Gulf of Alaska and Bristol Bay.
Anisakid parasite levels were higher in chum and pink salmon, while coho and sockeye remained stable.
This approach enables long-term tracking of climate change effects without fresh samples, potentially informing ecosystem management.