Hello,
Signature just means distinctive. Distinctive means unique or peculiar. So, it's talking about the river's sediments, which is the special identifying mark for salmon's to go back to the Yukon.
Regards,
Andy
8 de julio de 2022
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It’s a particular quality that makes something different from other similar things.
10 de julio de 2022
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A mark of something. Andy said it best!
8 de julio de 2022
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¿No has encontrado las respuestas?
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