Alaska Chinook salmon study requiring lethal sampling during worst-ever run draws Yukon criticism

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An Alaska study of a parasite in Yukon River Chinook salmon is facing criticism in the Yukon due to researchers lethally sampling fish during the worst season on record.

Researchers with the Alaska Department of Fish and Game (ADF&G) have killed 452 fish to examine them for ichthyophonus, a disease-causing pathogen that may be causing Chinook to die mid-migration.

However, fewer than 45,000 Chinook entered the river this season and just more than 11,000 have entered Canada. A minimum of 42,500 fish, under an international agreement, are supposed to make it to their Yukon spawning grounds. 

The run is the smallest recorded and marks the fourth season in a row where minimum

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