Tag Archives: otoliths

Research shows juvenile endangered California salmon use different rivers than expected

In a paper published online last week in the journal Biological Conservation, a team of California researchers revealed a surprising finding: Juvenile winter-run Chinook aren’t just using the Sacramento River as rearing habitat; after hatching, they also venture in large numbers into the river’s tributaries, including creeks that feed into it below Redding, as well the Feather and the American rivers. Winter-run Chinook are a distinct species of salmon that return each year to spawn and die in the Sacramento River near Redding. click here to read the story 11:16

Tiny ear bones of fish tell a big story about the environment.

Fish ear bones, also known as otoliths, are like tree rings for the ocean. A layer of calcium carbonate laid down each year offers a snapshot of both the fish’s yearly growth and its surrounding ocean conditions. [email protected]