March 14, 2019 — NOAA Fisheries scientists are developing cutting-edge techniques to age eulachon, a key forage fish, by reading the history recorded in its ear stones.
The eulachon is a little fish that plays a big role in the ecosystem, history, and culture of northwest North America. But in recent decades populations have declined dramatically over much of its range. Age data are crucial to accurately assess stocks and sustainably manage this vital prey species.
Despite its importance in the ecosystem, the eulachon has been little studied compared to many commercially fished species. Currently, there is no established method to age eulachon.