A fish’s life history is stored in its ears – and we can read it with the right tools

A fish’s life history is stored in its ears – and we can read it with the right tools

Imagine if we could follow a salmon during its entire, multi-year life cycle. How long did she stay in the natal stream before she migrated to the ocean? How many years did she stay in the ocean? Was her natal stream contaminated with heavy metals? What about the ocean? Did her mother pass on heavy metals to her? Could her metal burden cause health implications to her? Or to those who consume her?

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